feat: enable passive health checks and upstream retries in Caddy

* test: Add an e2e test for build&push

* test: Add image cleanup

* test: Switch to assert.NoError

.github/workflows/go-tests.yml

@@ -0,0 +1,36 @@
+name: Go Tests
+
+on:
+  push:
+    branches:
+      - "main"
+      - "test/**"
+      - "release/**"
+  pull_request:
+    branches:
+      - main
+    paths:
+      - ".github/**"
+      - "**.go"
+      - "go.*"
+      - "Makefile"
+      - "scripts/**"
+      - "test/**"
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+
+      - name: Set up Go
+        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
+        with:
+          go-version: "1.23.2"
+
+      - name: Install dependencies
+        run: go mod tidy
+
+      - name: Run tests
+        run: make test
+    timeout-minutes: 10

.gitignore

@@ -30,6 +30,7 @@ go.work.sum
 /data/
 /dist/
 /uc
+/tmp
 
 # Web
 node_modules/

.goreleaser.yaml

@@ -24,6 +24,8 @@ builds:
     goarch:
       - amd64
       - arm64
+    ldflags:
+      - -s -w -X github.com/psviderski/uncloud/internal/version.version={{ .Version }}
 
   - id: uncloudd
     main: ./cmd/uncloudd
@@ -35,6 +37,8 @@ builds:
     goarch:
       - amd64
       - arm64
+    ldflags:
+      - -s -w -X github.com/psviderski/uncloud/internal/version.version={{ .Version }}
 
 archives:
   - id: uncloud

Dockerfile

@@ -17,13 +17,22 @@ RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o uncloudd cmd/uncloudd/main
 
 
 FROM alpine:${ALPINE_VERSION} AS corrosion-download
-RUN wget -q -O /tmp/corrosion.tar.gz \
+ARG TARGETARCH
-      https://github.com/psviderski/corrosion/releases/latest/download/corrosion-aarch64-unknown-linux-gnu.tar.gz \
+
+RUN CORROSION_ARCH=$(case "${TARGETARCH}" in \
+      "amd64") echo "x86_64" ;; \
+      "arm64") echo "aarch64" ;; \
+      *) echo "Architecture '${TARGETARCH}' not supported" >&2 && exit 1 ;; \
+    esac) \
+    && wget -q -O /tmp/corrosion.tar.gz \
+      "https://github.com/psviderski/corrosion/releases/latest/download/corrosion-${CORROSION_ARCH}-unknown-linux-gnu.tar.gz" \
     && tar -xzf /tmp/corrosion.tar.gz -C /tmp \
     && install /tmp/corrosion /usr/local/bin/corrosion \
     && rm /tmp/corrosion.tar.gz /tmp/corrosion
 
-FROM chainguard/wolfi-base:latest AS corrosion
+# Beware that more modern images like chainguard/wolfi-base build glibc with flags that require newer CPU features,
+# e.g. x86-64-v2. So such image may fail with "Fatal glibc error: CPU does not support x86-64-v2" on older CPUs.
+FROM gcr.io/distroless/cc-debian12:latest AS corrosion
 COPY --from=corrosion-download /usr/local/bin/corrosion /usr/local/bin/corrosion
 CMD ["corrosion", "agent"]
 

Makefile

@@ -1,5 +1,6 @@
 CORROSION_IMAGE ?= ghcr.io/psviderski/corrosion:latest
 UCIND_IMAGE ?= ghcr.io/psviderski/ucind:latest
+DOCS_IMAGE ?= ghcr.io/psviderski/uncloud-docs:latest
 
 update-dev:
 	GOOS=linux GOARCH=amd64 go build -o uncloudd-linux-amd64 ./cmd/uncloudd && \
@@ -36,6 +37,10 @@ demo-reset:
 	ssh root@5.223.45.199 "AUTO_CONFIRM=true sudo -E uncloud-uninstall"
 	ssh spy@192.168.40.243 "AUTO_CONFIRM=true sudo -E uncloud-uninstall"
 
+.PHONY: ucind-cluster
+ucind-cluster:
+	go run ./cmd/ucind cluster rm && go run ./cmd/ucind cluster create -m 3
+
 .PHONY: proto
 proto:
 	protoc --go_out=. --go_opt=paths=source_relative --go-grpc_out=. --go-grpc_opt=paths=source_relative \
@@ -45,14 +50,51 @@ proto:
 corrosion-image:
 	docker build -t "$(CORROSION_IMAGE)" --target corrosion .
 
-.PHONY: corrosion-image-push
+.PHONY: corrosion-multiarch-image-push
-corrosion-image-push: corrosion-image
+corrosion-multiarch-image-push:
-	docker push "$(CORROSION_IMAGE)"
+	docker buildx build --push --platform linux/amd64,linux/arm64 -t "$(CORROSION_IMAGE)" --target corrosion .
 
 .PHONY: ucind-image
 ucind-image:
 	docker build -t "$(UCIND_IMAGE)" --target ucind .
 
-.PHONY: ucind-image-push
+.PHONY: ucind-multiarch-image-push
-ucind-image-push: ucind-image
+ucind-multiarch-image-push:
-	docker push "$(UCIND_IMAGE)"
+	docker buildx build --push --platform linux/amd64,linux/arm64 -t "$(UCIND_IMAGE)" --target ucind .
+
+.PHONY: test
+test:
+ifeq ($(TEST_NAME),)
+	go test -count=1 -v ./...
+else
+	go test -count=1 -v -run ^$(TEST_NAME)$$ ./...
+endif
+
+.PHONY: test-clean
+test-clean:
+	@CONTAINERS=$$(docker ps --filter "name=ucind-test" -q); \
+	if [ -n "$$CONTAINERS" ]; then \
+		echo "Killing containers..."; \
+		docker kill $$CONTAINERS; \
+	fi; \
+	CONTAINERS_STOPPED=$$(docker ps -a --filter "name=ucind-test" -q); \
+	if [ -n "$$CONTAINERS_STOPPED" ]; then \
+		echo "Removing stopped containers..."; \
+		docker rm $$CONTAINERS_STOPPED; \
+	else \
+		echo "Nothing to clean."; \
+	fi
+
+.PHONY: vet
+vet:
+	go vet ./...
+
+.PHONY: docs-image-push
+docs-image:
+	docker buildx build --push --platform linux/amd64,linux/arm64 -t "$(DOCS_IMAGE)" ./docs
+
+.PHONY: install-dev
+install-dev:
+	go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.34.2
+	go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.5.1
+# TODO: install a pinned protoc version

README.md

@@ -2,39 +2,41 @@
   <img src="./website/images/logo.svg" height="100" alt="Uncloud logo"/>
   <h1>Uncloud</h1>
   <p><strong>Docker simplicity. Multi-machine power.</strong></p>
+
+  <p>
+    <a href="https://docs.uncloud.run"><img src="https://img.shields.io/badge/Docs-blue.svg?style=for-the-badge&logo=gitbook&logoColor=white" alt="Documentation"></a>
+    <a href="https://discord.gg/eR35KQJhPu"><img src="https://img.shields.io/badge/discord-5865F2.svg?style=for-the-badge&logo=discord&logoColor=white" alt="Join Discord"></a>
+    <a href="https://x.com/psviderski"><img src="https://img.shields.io/badge/follow-black?style=for-the-badge&logo=X&logoColor=while" alt="Follow on X"></a>
+  </p>
 </div>
 
 Uncloud is a lightweight clustering and container orchestration tool that lets you deploy and manage web apps across
-cloud VMs and bare metal with minimized cluster management overhead. It creates a secure WireGuard mesh network between
+cloud VMs and bare metal with minimised cluster management overhead. It creates a secure WireGuard mesh network between
 your Docker hosts and provides automatic service discovery, load balancing, ingress with HTTPS, and simple CLI commands
 to manage your apps.
 
 Unlike traditional orchestrators, there's no central control plane and quorum to maintain. Each machine maintains a
-synchronized copy of the cluster state through peer-to-peer communication, keeping cluster operations functional even if
+synchronised copy of the cluster state through peer-to-peer communication, keeping cluster operations functional even if
 some machines go offline.
 
-Uncloud aims to be the solution for developers who want the flexibility of self-hosted infrastructure without the
+Uncloud is the solution for developers who want the flexibility of self-hosted infrastructure without the operational
-operational complexity of Kubernetes.
+complexity of Kubernetes.
-
-## 🎬 Quick demo
-
-Deploy a highly available web app with automatic HTTPS across multiple regions and on-premises in just a couple minutes.
-
-<a href="https://uncloud.wistia.com/medias/k47uwt9uau?wvideo=k47uwt9uau">
-<img src="https://embed-ssl.wistia.com/deliveries/3cf7014a48b93afc556444bed3e39a8c.jpg?image_crop_resized=900x526&image_play_button_rounded=true&image_play_button_size=2x&image_play_button_color=18181Be0" alt="Uncloud demo" width="450" height="263" />
-</a>
 
 ## ✨ Features
 
 * **Deploy anywhere**: Combine cloud VMs, dedicated servers, and bare metal into a unified computing environment —
   regardless of location or provider.
+* **Docker Compose**: Familiar [Docker Compose](https://compose-spec.io/) format for defining services and volumes. No
+  need to learn a new bespoke DSL.
+* **Zero-downtime deployments**: Rolling updates without service interruption. Automatic rollback on failure is coming
+  soon.
+* **Service discovery**: Built-in DNS server resolves service names to container IPs.
+* **Persistent storage**: Run stateful services with Docker volumes managed across machines.
 * **Zero-config private network**: Automatic WireGuard mesh with peer discovery and NAT traversal. Containers get unique
   IPs for direct cross-machine communication.
-* **No control plane**: Fully decentralized design eliminates single points of failure and reduces operational overhead.
+* **No control plane**: Fully decentralised design eliminates single points of failure and reduces operational overhead.
 * **Imperative over declarative**: Favoring imperative operations over state reconciliation simplifies both the mental
   model and troubleshooting.
-* **Zero-downtime deployments**: Rolling updates with health checks and automatic rollback on failure.
-* **Service discovery**: Built-in DNS server resolves service names to container IPs.
 * **Managed DNS**: Automatic DNS records `*.<id>.cluster.uncloud.run` for services with public access via managed
   [Uncloud DNS](https://github.com/psviderski/uncloud-dns) service.
 * **Automatic HTTPS**: Built-in Caddy reverse proxy handles TLS certificate provisioning and renewal using Let's
@@ -42,17 +44,22 @@ Deploy a highly available web app with automatic HTTPS across multiple regions a
 * **Docker-like CLI**: Familiar commands for managing both infrastructure and applications.
 * **Remote management**: Control your entire infrastructure through SSH access to any single machine in the cluster.
 
-Coming soon:
+## 🎬 Quick demo
 
-* Infrastructure as Code using Docker Compose format
+The screenshot below demonstrates how I use Uncloud to deploy the [Uncloud Documentation](https://docs.uncloud.run)
-* Project isolation through environments/namespaces
+website to 2 remote machines (why not?) from the [`compose.yaml`](docs/compose.yaml) file on my local machine.
-* Persistent volumes and secrets management
-* Monitoring and log aggregation
-* Database deployment and management
 
-Here is a diagram of an Uncloud multi-provider cluster of 3 machines:
+It exposes the container port `8000/tcp` as HTTPS on the domain `docs.uncloud.run`, served by the Caddy reverse proxy on
+the remote machines. All managed by Uncloud.
 
-![Diagram: multi-provider cluster of 3 machines](website/images/diagram.webp)
+![Uncloud compose deployment demo](.github/images/compose-deploy.jpg)
+
+Here is a more advanced use case. Deploy a highly available web app with automatic HTTPS across multiple regions and
+on-premises in just a couple minutes.
+
+<a href="https://uncloud.wistia.com/medias/k47uwt9uau?wvideo=k47uwt9uau">
+<img src="https://embed-ssl.wistia.com/deliveries/3cf7014a48b93afc556444bed3e39a8c.jpg?image_crop_resized=900x526&image_play_button_rounded=true&image_play_button_size=2x&image_play_button_color=18181Be0" alt="Uncloud demo" width="450" height="263" />
+</a>
 
 ## 💫 Why Uncloud?
 
@@ -62,14 +69,15 @@ believe there's a sweet spot in between — a pragmatic solution for the majorit
 scale. You should be able to:
 
 * **Own your infrastructure and data**: Whether driven by costs, compliance, or flexibility, run applications on any
-  combination of cloud VMs and personal hardware while maintaining the cloud-like experience you love.
+  combination of cloud VMs and personal hardware while controlling your data and maintaining the cloud-like experience
-* **Stay simple**: Don't worry about control planes, highly-available clusters, or complex YAML configurations for
+  you love.
-  common use cases.
+* **Stay simple as you grow**: Start with a single machine and add more whenever you need without changing your
+  workflow. No worrying about highly-available control planes or complex YAML configurations.
 * **Build with proven primitives**: Get production-grade networking, deployment primitives, service discovery, load
   balancing, and ingress with HTTPS out of the box without becoming a distributed systems expert.
-* **Support sustainable computing** 🌿: Minimize system overhead to maximize resources available for your applications.
+* **Support sustainable computing** 🌿: Minimise system overhead to maximise resources available for your applications.
 
-Uncloud's goal is to make deployment and management of containerized applications feel as seamless as using a cloud
+Uncloud's goal is to make deployment and management of containerised applications feel as seamless as using a cloud
 platform, whether you're running on a $5 VPS, a spare Mac mini, or a rack of bare metal servers.
 
 ## 🚀 Quick start
@@ -83,7 +91,7 @@ platform, whether you're running on a $5 VPS, a spare Mac mini, or a rack of bar
    curl -fsS https://get.uncloud.run/install.sh | sh
    ```
 
-2. Initialize your first machine:
+2. Initialise your first machine:
 
    ```bash
    uc machine init root@your-server-ip
@@ -114,14 +122,20 @@ platform, whether you're running on a $5 VPS, a spare Mac mini, or a rack of bar
    uncloud-uninstall
    ```
 
-View the [user guide](docs/user_guide.md) for more information.
+View the [Documentation](https://docs.uncloud.run) for more information.
 
 ## ⚙️ How it works
 
-Check out the [design document](docs/design.md) to understand Uncloud's design philosophy and goals. Here, let's peek
+Check out the [design document](docs/design.md) to understand Uncloud's design philosophy and goals.
-under the hood to see what happens when you run certain commands.
 
-**When you initialize a new cluster on a machine:**
+Here is a diagram of an Uncloud multi-provider cluster of 3 machines:
+
+![Diagram: multi-provider cluster of 3 machines](website/images/diagram.webp)
+
+<details>
+<summary>Peek under the hood to see what happens when you run certain commands.</summary>
+
+**When you initialise a new cluster on a machine:**
 
 ```bash
 $ uc machine init --name oracle-vm ubuntu@152.67.101.197
@@ -254,23 +268,49 @@ Look ma, no control plane or master nodes to maintain! Just a simple overlay net
 sync that lets machines work together. Want to check on things or make changes? Connect to any machine either implicitly
 using the CLI or directly over SSH. They all have the complete cluster state and can control everything. It's like each
 machine is a full backup of your control plane.
+</details>
 
 ## 🏗 Project status
 
 Uncloud is currently in active development and is **not ready for production use**. Features may change significantly
 and there may be breaking changes between releases.
 
-I'd love your input! Here's how you can contribute:
+We'd love your input! Here's how you can contribute:
 
 * 🐛 Found a bug? [Open an issue](https://github.com/psviderski/uncloud/issues)
-* 💡 Have ideas? [Join the discussion](https://github.com/psviderski/uncloud/discussions)
+* 💡 Have ideas or need help? [Join our Discord community](https://discord.gg/eR35KQJhPu) where we discuss features,
+  roadmap, implementation details, and help each other out.
+
+## 🙏 Inspiration & Acknowledgements
+
+I'm grateful to the following projects that inspired Uncloud's design and implementation:
+
+* [Kamal](https://kamal-deploy.org/) — for proving that even in the declarative era of Kubernetes there is a place for
+  simple deployment tools that use imperative commands without complex orchestration. Kamal powers the multi-billion
+  dollar company [37signals](https://37signals.com/) where it was created, and that's truly inspiring!
+* [Fly.io](https://fly.io/) — for inspiring my vision for what self-hosted infrastructure should feel like, proving that
+  developer experience and powerful infrastructure can coexist beautifully.
+* [Tailscale](https://tailscale.com/) — for pioneering the vision of decentralised flat mesh networking with an amazing
+  user experience that feels like magic.
+* [Talos Linux](https://github.com/siderolabs/talos)
+  and [KubeSpan](https://www.talos.dev/v1.10/talos-guides/network/kubespan/) — for the machine API design using
+  [grpc-proxy](https://github.com/siderolabs/grpc-proxy) and for its elegant approach to secure WireGuard-based overlay
+  networking with zero configuration.
+* [Docker Swarm Classic](https://github.com/docker-archive/classicswarm) and
+  [Rancher 1.x](http://rancher-com-website-main-elb-elb-1798790864.us-west-2.elb.amazonaws.com/docs/rancher/v1.6/en/)
+  — for showing the power of simplicity and pragmatism in container orchestration and that not every problem needs the
+  complexity of Kubernetes.
+
+Special thanks to the [Corrosion](https://github.com/superfly/corrosion) project by Fly.io for providing the distributed
+SQLite database used to share Uncloud's cluster state.
 
 ## 📫 Stay updated
 
-* [Subscribe](https://uncloud.run/#subscribe) to my newsletter to follow the progress, get early insights into new
+* Join our [Discord server](https://discord.gg/eR35KQJhPu) for real-time discussions, support, and updates.
+* Follow [@psviderski](https://x.com/psviderski) on X/Twitter.
+* Subscribe to [my newsletter](https://uncloud.run/#subscribe) to follow the progress, get early insights into new
   features, and be the first to know when it's ready for production use.
 * Watch this repository for releases.
-* Follow [@psviderski](https://github.com/psviderski) on GitHub.
 
 ## ❤️ Contributors
 

cmd/uncloud/build.go

@@ -0,0 +1,77 @@
+package main
+
+import (
+	"context"
+	"fmt"
+
+	composecli "github.com/compose-spec/compose-go/v2/cli"
+	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/pkg/client/compose"
+	"github.com/spf13/cobra"
+)
+
+// NewBuildCommand creates a new command to build services from a Compose file.
+func NewBuildCommand() *cobra.Command {
+	opts := cli.BuildOptions{}
+	cmd := &cobra.Command{
+		Use:   "build [FLAGS] [SERVICE...]",
+		Short: "Build services from a Compose file.",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+
+			if len(args) > 0 {
+				opts.Services = args
+			}
+
+			return runBuild(cmd.Context(), uncli, opts)
+		},
+	}
+
+	cmd.Flags().StringSliceVarP(&opts.Files, "file", "f", nil,
+		"One or more Compose files to build (default compose.yaml)")
+	cmd.Flags().StringSliceVarP(&opts.Profiles, "profile", "p", nil,
+		"One or more Compose profiles to enable.")
+	cmd.Flags().BoolVarP(&opts.Push, "push", "P", false,
+		"Push built images to the registry after building. (default false)")
+	cmd.Flags().BoolVarP(&opts.NoCache, "no-cache", "n", false,
+		"Do not use cache when building images. (default false)")
+
+	return cmd
+}
+
+// TODO: deduplicate with a similar functino for deploy options
+// projectOpts returns the project options for the Compose file(s).
+func projectOptsFromBuildOpts(opts cli.BuildOptions) []composecli.ProjectOptionsFn {
+	projectOpts := []composecli.ProjectOptionsFn{}
+
+	if len(opts.Profiles) > 0 {
+		projectOpts = append(projectOpts, composecli.WithDefaultProfiles(opts.Profiles...))
+	}
+
+	return projectOpts
+}
+
+// runBuild parses the Compose file(s), builds the services, and pushes them if requested.
+func runBuild(ctx context.Context, uncli *cli.CLI, opts cli.BuildOptions) error {
+	projectOpts := projectOptsFromBuildOpts(opts)
+	project, err := compose.LoadProject(ctx, opts.Files, projectOpts...)
+	if err != nil {
+		return fmt.Errorf("load compose file(s): %w", err)
+	}
+
+	if len(opts.Services) > 0 {
+		project, err = project.WithSelectedServices(opts.Services)
+		if err != nil {
+			return fmt.Errorf("select services: %w", err)
+		}
+	}
+
+	servicesToBuild := cli.GetServicesThatNeedBuild(project)
+
+	if len(servicesToBuild) == 0 {
+		fmt.Println("No services to build.")
+		return nil
+	}
+
+	return cli.BuildServices(ctx, servicesToBuild, opts)
+}

cmd/uncloud/caddy/deploy.go

@@ -152,7 +152,8 @@ func runDeploy(ctx context.Context, uncli *cli.CLI, opts deployOptions) error {
 }
 
 func UpdateDomainRecords(ctx context.Context, clusterClient *client.Client, progressOut *streams.Out) error {
-	if _, err := clusterClient.GetDomain(ctx); err != nil {
+	domain, err := clusterClient.GetDomain(ctx)
+	if err != nil {
 		if errors.Is(err, api.ErrNotFound) {
 			fmt.Println("Skipping DNS records update as no cluster domain is reserved (see 'uc dns').")
 			return nil
@@ -164,7 +165,7 @@ func UpdateDomainRecords(ctx context.Context, clusterClient *client.Client, prog
 	// TODO: split the method into two: one to get the records and one to update them to ask for update confirmation.
 
 	var records []*pb.DNSRecord
-	err := progress.RunWithTitle(ctx, func(ctx context.Context) error {
+	err = progress.RunWithTitle(ctx, func(ctx context.Context) error {
 		var err error
 		records, err = clusterClient.CreateIngressRecords(ctx, client.CaddyServiceName)
 		return err
@@ -172,18 +173,19 @@ func UpdateDomainRecords(ctx context.Context, clusterClient *client.Client, prog
 	if err != nil {
 		if errors.Is(err, client.ErrNoReachableMachines) {
 			fmt.Println()
-			fmt.Println("DNS records could not be updated as there are no internet-reachable machines running " +
+			fmt.Printf("DNS records for domain '%s' could not be updated as there are no internet-reachable "+
-				"caddy containers.")
+				"machines running caddy containers.\n", domain)
 			fmt.Println()
 			fmt.Println("Possible solutions:")
 			fmt.Println("- Ensure your machines have public IP addresses")
 			fmt.Println("- Use --public-ip flag when adding machines to override the automatically detected IPs")
 			fmt.Println("- Check firewall settings on your machines")
 			fmt.Println("- Configure port forwarding if behind NAT")
-			fmt.Println("- Retry Caddy deployment after resolving connectivity issues with 'uc caddy deploy'")
+			fmt.Println("- Retry Caddy deployment with 'uc caddy deploy' after resolving connectivity issues")
 			fmt.Println()
-			fmt.Println("Your services will not be accessible from the internet until at least one machine " +
+			fmt.Println("Your services won't be accessible from the internet until at least one machine " +
-				"becomes reachable.")
+				"becomes reachable. If you aren't planning to expose any services publicly, you can release " +
+				"the domain by running 'uc dns release'.")
 		}
 		return fmt.Errorf("failed to update DNS records pointing to caddy service: %w", err)
 	}

cmd/uncloud/context/use.go

@@ -78,6 +78,5 @@ func buildContextOptions(contexts []string, current string) []huh.Option[string]
 		options[i] = opt
 	}
 
-	options[1].Selected(true)
 	return options
 }

cmd/uncloud/deploy.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"strings"
 
+	composecli "github.com/compose-spec/compose-go/v2/cli"
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/psviderski/uncloud/internal/cli"
 	"github.com/psviderski/uncloud/pkg/api"
@@ -17,7 +18,9 @@ import (
 
 type deployOptions struct {
 	files    []string
+	profiles []string
 	services []string
+	noBuild  bool
 
 	context string
 }
@@ -40,18 +43,36 @@ func NewDeployCommand() *cobra.Command {
 	}
 
 	cmd.Flags().StringSliceVarP(&opts.files, "file", "f", nil,
-		"One or more Compose files to deploy services from. (default compose-ports-long.yaml)")
+		"One or more Compose files to deploy services from. (default compose.yaml)")
+	cmd.Flags().StringSliceVarP(&opts.profiles, "profile", "p", nil,
+		"One or more Compose profiles to enable.")
 	cmd.Flags().StringVarP(&opts.context, "context", "c", "",
 		"Name of the cluster context to deploy to (default is the current context)")
+	cmd.Flags().BoolVarP(&opts.noBuild, "no-build", "n", false,
+		"Do not build images before deploying services. (default false)")
+
 	// TODO: Consider adding a filter flag to specify which machines to deploy to but keep the rest running.
 	//  Could be useful to test a new version on a subset of machines before rolling out to all.
 
 	return cmd
 }
 
+// projectOpts returns the project options for the Compose file(s).
+func projectOpts(opts deployOptions) []composecli.ProjectOptionsFn {
+	projectOpts := []composecli.ProjectOptionsFn{}
+
+	if len(opts.profiles) > 0 {
+		projectOpts = append(projectOpts, composecli.WithDefaultProfiles(opts.profiles...))
+	}
+
+	return projectOpts
+}
+
 // runDeploy parses the Compose file(s) and deploys the services.
 func runDeploy(ctx context.Context, uncli *cli.CLI, opts deployOptions) error {
-	project, err := compose.LoadProject(ctx, opts.files)
+	projectOpts := projectOpts(opts)
+
+	project, err := compose.LoadProject(ctx, opts.files, projectOpts...)
 	if err != nil {
 		return fmt.Errorf("load compose file(s): %w", err)
 	}
@@ -64,6 +85,23 @@ func runDeploy(ctx context.Context, uncli *cli.CLI, opts deployOptions) error {
 		}
 	}
 
+	servicesToBuild := cli.GetServicesThatNeedBuild(project)
+
+	if len(servicesToBuild) > 0 {
+		if opts.noBuild {
+			fmt.Println("Not building services as requested.")
+		} else {
+			buildOpts := cli.BuildOptions{
+				Push:    true,
+				NoCache: false,
+			}
+
+			if err := cli.BuildServices(ctx, servicesToBuild, buildOpts); err != nil {
+				return fmt.Errorf("build services: %w", err)
+			}
+		}
+	}
+
 	clusterClient, err := uncli.ConnectCluster(ctx, opts.context)
 	if err != nil {
 		return fmt.Errorf("connect to cluster: %w", err)

cmd/uncloud/machine/add.go

@@ -62,8 +62,8 @@ func NewAddCommand() *cobra.Command {
 			"blank '' or 'none' to disable ingress on this machine, or specify an IP address.",
 	)
 	cmd.Flags().StringVarP(
-		&opts.sshKey, "ssh-key", "i", "",
+		&opts.sshKey, "ssh-key", "i", "~/.ssh/id_ed25519",
-		"path to SSH private key for SSH remote login. (default ~/.ssh/id_*)",
+		"Path to SSH private key for remote login (if not already added to SSH agent).",
 	)
 	cmd.Flags().StringVar(
 		&opts.version, "version", "latest",
@@ -92,7 +92,7 @@ func add(ctx context.Context, uncli *cli.CLI, remoteMachine cli.RemoteMachine, o
 		publicIP = &ip
 	}
 
-	machineClient, err := uncli.AddMachine(ctx, cli.AddMachineOptions{
+	clusterClient, machineClient, err := uncli.AddMachine(ctx, cli.AddMachineOptions{
 		Context:       opts.context,
 		MachineName:   opts.name,
 		PublicIP:      publicIP,
@@ -102,6 +102,7 @@ func add(ctx context.Context, uncli *cli.CLI, remoteMachine cli.RemoteMachine, o
 	if err != nil {
 		return err
 	}
+	defer clusterClient.Close()
 	defer machineClient.Close()
 
 	if opts.noCaddy {
@@ -117,8 +118,11 @@ func add(ctx context.Context, uncli *cli.CLI, remoteMachine cli.RemoteMachine, o
 
 	// Deploy a Caddy service container to the added machine. If caddy service is already deployed on other machines,
 	// use the deployed image version. Otherwise, use the latest version.
+	// NOTE: We use the cluster client to inspect and scale the Caddy service because the newly added machine may have
+	// issues accessing the Machine API of existing machines in the cluster.
+	// See the issue for more details: https://github.com/psviderski/uncloud/issues/65.
 	caddyImage := ""
-	caddySvc, err := machineClient.InspectService(ctx, client.CaddyServiceName)
+	caddySvc, err := clusterClient.InspectService(ctx, client.CaddyServiceName)
 	if err != nil {
 		if !errors.Is(err, api.ErrNotFound) {
 			return fmt.Errorf("inspect caddy service: %w", err)
@@ -141,7 +145,7 @@ func add(ctx context.Context, uncli *cli.CLI, remoteMachine cli.RemoteMachine, o
 
 	// TODO: scale the existing Caddy service to the new machine instead of running a new deployment
 	//  that may cause a small downtime.
-	d, err := machineClient.NewCaddyDeployment(caddyImage, api.Placement{})
+	d, err := clusterClient.NewCaddyDeployment(caddyImage, api.Placement{})
 	if err != nil {
 		return fmt.Errorf("create caddy deployment: %w", err)
 	}

cmd/uncloud/machine/init.go

@@ -80,8 +80,8 @@ func NewInitCommand() *cobra.Command {
 			"blank '' or 'none' to disable ingress on this machine, or specify an IP address.",
 	)
 	cmd.Flags().StringVarP(
-		&opts.sshKey, "ssh-key", "i", "",
+		&opts.sshKey, "ssh-key", "i", "~/.ssh/id_ed25519",
-		"Path to SSH private key for SSH remote login. (default ~/.ssh/id_*)",
+		"Path to SSH private key for remote login (if not already added to SSH agent).",
 	)
 	cmd.Flags().StringVar(
 		&opts.version, "version", "latest",
@@ -114,7 +114,6 @@ func initCluster(ctx context.Context, uncli *cli.CLI, remoteMachine *cli.RemoteM
 		}
 		publicIP = &ip
 	}
-	
 	client, err := uncli.InitCluster(ctx, cli.InitClusterOptions{
 		Context:       opts.context,
 		MachineName:   opts.name,

cmd/uncloud/machine/root.go

@@ -6,8 +6,9 @@ import (
 
 func NewRootCommand() *cobra.Command {
 	cmd := &cobra.Command{
-		Use:   "machine",
+		Use:     "machine",
-		Short: "Manage machines in an Uncloud cluster.",
+		Aliases: []string{"m"},
+		Short:   "Manage machines in an Uncloud cluster.",
 	}
 	cmd.AddCommand(
 		NewAddCommand(),

cmd/uncloud/main.go

@@ -15,6 +15,7 @@ import (
 	"github.com/psviderski/uncloud/internal/cli"
 	"github.com/psviderski/uncloud/internal/cli/config"
 	"github.com/psviderski/uncloud/internal/fs"
+	"github.com/psviderski/uncloud/internal/version"
 	"github.com/spf13/cobra"
 )
 
@@ -28,6 +29,7 @@ func main() {
 	cmd := &cobra.Command{
 		Use:           "uncloud",
 		Short:         "A CLI tool for managing Uncloud resources such as clusters, machines, and services.",
+		Version:       version.String(),
 		SilenceUsage:  true,
 		SilenceErrors: true,
 		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
@@ -73,6 +75,7 @@ func main() {
 
 	cmd.AddCommand(
 		NewDeployCommand(),
+		NewBuildCommand(),
 		caddy.NewRootCommand(),
 		cmdcontext.NewRootCommand(),
 		dns.NewRootCommand(),

cmd/uncloud/service/inspect.go

@@ -22,7 +22,7 @@ type inspectOptions struct {
 func NewInspectCommand() *cobra.Command {
 	opts := inspectOptions{}
 	cmd := &cobra.Command{
-		Use:   "inspect",
+		Use:   "inspect SERVICE",
 		Short: "Display detailed information on a service.",
 		Args:  cobra.ExactArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {

cmd/uncloud/service/run.go

@@ -86,9 +86,10 @@ func NewRunCommand() *cobra.Command {
 			"Supported protocols: tcp, udp, http, https (default is tcp). If a hostname for http(s) port is not specified\n"+
 			"and a cluster domain is reserved, service-name.cluster-domain will be used as the hostname.\n"+
 			"Examples:\n"+
-			"  -p 8080/https                  Publish port 8080 as HTTPS via load balancer with default service-name.cluster-domain hostname\n"+
+			"  -p 8080/https                  Publish port 8080 as HTTPS via reverse proxy with default service-name.cluster-domain hostname\n"+
-			"  -p app.example.com:8080/https  Publish port 8080 as HTTPS via load balancer with custom hostname\n"+
+			"  -p app.example.com:8080/https  Publish port 8080 as HTTPS via reverse proxy with custom hostname\n"+
-			"  -p 9000:8080                   Publish port 8080 as TCP port 9000 via load balancer\n"+
+			// TODO: add support for publishing L4 tcp/udp ports.
+			//"  -p 9000:8080                   Publish port 8080 as TCP port 9000 via reverse proxy\n"+
 			"  -p 53:5353/udp@host            Bind UDP port 5353 to host port 53")
 	cmd.Flags().StringVar(&opts.pull, "pull", api.PullPolicyMissing,
 		fmt.Sprintf("Pull image from the registry before running service containers ('%s', '%s', '%s').",

cmd/uncloud/service/scale.go

@@ -143,7 +143,7 @@ func confirm() (bool, error) {
 				Negative("No").
 				Value(&confirmed),
 		),
-	)
+	).WithAccessible(true)
 	if err := form.Run(); err != nil {
 		return false, err
 	}

cmd/uncloud/volume/create.go

@@ -26,7 +26,7 @@ func NewCreateCommand() *cobra.Command {
 	opts := createOptions{}
 
 	cmd := &cobra.Command{
-		Use:   "create [FLAGS] VOLUME_NAME",
+		Use:   "create VOLUME_NAME",
 		Short: "Create a volume on a specific machine.",
 		Args:  cobra.ExactArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {

cmd/uncloud/volume/inspect.go

@@ -20,7 +20,7 @@ func NewInspectCommand() *cobra.Command {
 	opts := inspectOptions{}
 
 	cmd := &cobra.Command{
-		Use:   "inspect [FLAGS] VOLUME_NAME",
+		Use:   "inspect VOLUME_NAME",
 		Short: "Display detailed information on a volume.",
 		Args:  cobra.ExactArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {

cmd/uncloud/volume/ls.go

@@ -23,7 +23,7 @@ func NewListCommand() *cobra.Command {
 	opts := listOptions{}
 
 	cmd := &cobra.Command{
-		Use:     "ls [FLAGS]",
+		Use:     "ls",
 		Aliases: []string{"list"},
 		Short:   "List volumes across all machines in the cluster.",
 		RunE: func(cmd *cobra.Command, args []string) error {

cmd/uncloud/volume/rm.go

@@ -21,7 +21,7 @@ func NewRemoveCommand() *cobra.Command {
 	opts := removeOptions{}
 
 	cmd := &cobra.Command{
-		Use:     "rm [FLAGS] VOLUME_NAME [VOLUME_NAME...]",
+		Use:     "rm VOLUME_NAME [VOLUME_NAME...]",
 		Aliases: []string{"remove", "delete"},
 		Short:   "Remove one or more volumes.",
 		Long:    "Remove one or more volumes. You cannot remove a volume that is in use by a container.",

cmd/uncloudd/main.go

@@ -2,14 +2,16 @@ package main
 
 import (
 	"context"
-	"github.com/spf13/cobra"
 	"log/slog"
 	"os"
 	"os/signal"
 	"syscall"
+
 	"github.com/psviderski/uncloud/internal/daemon"
 	"github.com/psviderski/uncloud/internal/log"
 	"github.com/psviderski/uncloud/internal/machine"
+	"github.com/psviderski/uncloud/internal/version"
+	"github.com/spf13/cobra"
 )
 
 func main() {
@@ -22,6 +24,7 @@ func main() {
 	cmd := &cobra.Command{
 		Use:           "uncloudd",
 		Short:         "Uncloud machine daemon.",
+		Version:       version.String(),
 		SilenceUsage:  true,
 		SilenceErrors: true,
 		RunE: func(cmd *cobra.Command, args []string) error {

docs/.dockerignore

@@ -0,0 +1,14 @@
+# Ignore everything and use an allowlist of what is allowed to not package any secrets by accident.
+*
+
+# Allow files and directories.
+!docs/
+!src/
+!static/
+!pkg/
+!Caddyfile
+!*.js
+!*.json
+
+# Ignore unnecessary files inside allowed directories.
+**/.DS_Store

docs/.gitignore

@@ -0,0 +1,20 @@
+# Dependencies
+/node_modules
+
+# Production
+/build
+
+# Generated files
+.docusaurus
+.cache-loader
+
+# Misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*

docs/Caddyfile

@@ -0,0 +1,9 @@
+{
+    admin off
+}
+
+:8000 {
+    root * /usr/share/caddy
+    file_server
+    try_files {path} /index.html
+}

docs/Dockerfile

@@ -0,0 +1,27 @@
+# Stage 1: Base image.
+## Start with a base image containing NodeJS so we can build Docusaurus.
+FROM node:lts-alpine AS base
+## Disable colour output from yarn to make logs easier to read.
+ENV FORCE_COLOR=0
+## Enable corepack.
+RUN corepack enable
+## Set the working directory to `/opt/docusaurus`.
+WORKDIR /opt/docusaurus
+
+# Stage 2: Production build.
+FROM base AS prod
+## Set the working directory to `/opt/docusaurus`.
+WORKDIR /opt/docusaurus
+## Copy over the source code.
+COPY . /opt/docusaurus/
+## Install dependencies with `--immutable` to ensure reproducibility.
+RUN npm ci
+## Build the static site.
+RUN npm run build
+
+# Stage 3: Serve static site with Caddy.
+FROM caddy:2.10.0-alpine AS caddy
+## Copy the Caddyfile.
+COPY ./Caddyfile /etc/caddy/Caddyfile
+## Copy the Docusaurus build output.
+COPY --from=prod /opt/docusaurus/build /usr/share/caddy

docs/README.md

@@ -0,0 +1,41 @@
+# Website
+
+This website is built using [Docusaurus](https://docusaurus.io/), a modern static website generator.
+
+### Installation
+
+```
+$ yarn
+```
+
+### Local Development
+
+```
+$ yarn start
+```
+
+This command starts a local development server and opens up a browser window. Most changes are reflected live without having to restart the server.
+
+### Build
+
+```
+$ yarn build
+```
+
+This command generates static content into the `build` directory and can be served using any static contents hosting service.
+
+### Deployment
+
+Using SSH:
+
+```
+$ USE_SSH=true yarn deploy
+```
+
+Not using SSH:
+
+```
+$ GIT_USER=<Your GitHub username> yarn deploy
+```
+
+If you are using GitHub pages for hosting, this command is a convenient way to build the website and push to the `gh-pages` branch.

docs/compose.yaml

@@ -0,0 +1,8 @@
+services:
+  uncloud-docs:
+    image: ghcr.io/psviderski/uncloud-docs:latest
+    pull_policy: always
+    user: nobody
+    x-ports:
+      - docs.uncloud.run:8000/https
+    scale: 2

docs/docs/1-overview.md

@@ -0,0 +1,115 @@
+---
+slug: /
+---
+
+# Overview
+
+Uncloud makes **self-hosting web applications** across multiple machines in production dead simple.
+
+You can connect any machines — from cloud VMs to bare metal servers (no matter where they're located) — into a secure
+private network. Then run and scale multi-service and multi-container web apps and databases across your machines using
+simple Docker-like commands and [Docker Compose](https://docs.docker.com/reference/compose-file/) files.
+
+Uncloud covers all the essentials for operating apps in production without overwhelming you with the complexity of
+traditional container orchestrators like Kubernetes or Swarm:
+
+* Initial machine and network setup
+* Zero-downtime rolling deployments
+* Health checks and automatic restarts
+* Automatic HTTPS and reverse proxy configuration
+* Scaling services across multiple machines
+* Cross-machine service communication without exposing ports to the internet
+* DNS-based service discovery
+* Load balancing
+* Persistent storage
+
+## Use cases
+
+Some of the common use cases Uncloud is a great fit for:
+
+- **Self-hosting and Homelabs**: Run your self-hosted apps on your own hardware. Start with a single machine and add
+  more as your needs grow.
+- **Outgrowing Docker Compose**: Level up your Docker Compose setup with zero-downtime deployments, replicas across
+  multiple machines for improved reliability, cross-machine service communication, automated reverse proxy management,
+  and more using the same Compose file.
+- **Small to medium web applications**: Deploy your SaaS product, websites, or personal projects with redundancy across
+  multiple machines for better reliability and your peace of mind.
+- **Hybrid setups (cloud + on-prem)**: Combine cloud VMs with on-premise for cost savings and data sovereignty — all
+  managed through the same interface.
+- **Agencies and freelancers**: Host multiple client projects with proper isolation on shared infrastructure, optimising
+  costs and resources.
+- **Edge computing**: Deploy applications closer to your users for lower latency and better performance.
+- **Dev/staging environments**: Spin up additional environments for development and testing that mirror production
+  reusing the same Compose configuration.
+
+## What makes Uncloud different
+
+Here are the design decisions that make Uncloud stand out:
+
+### Decentralised design
+
+You can think of an Uncloud cluster as a **network of Docker hosts** (machines) that are all aware of each other. All
+machines in the cluster are equal. You can connect to any of them to manage containers on any other machine in the
+cluster. If a machine or part of the network goes down, the rest of the cluster keeps running.
+
+There is no centralised control plane, so no need to worry about maintaining a quorum of machines for it. The time saved
+can be better spent developing and deploying your apps instead.
+
+### Zero-config overlay network
+
+Uncloud automatically configures and maintains a secure **WireGuard mesh network** across your machines. It handles key
+management, peer discovery, and NAT traversal without any manual configuration. This makes it easy to connect machines
+from different networks and locations, such as cloud VMs, on-premise servers, or your Raspberry Pi at home.
+
+Docker containers running on different machines get **unique IP addresses** from the cluster network so they can
+**communicate directly** as if they were on a single machine without opening up any host ports to the internet.
+
+The design and implementation were highly inspired by
+Talos [KubeSpan](https://www.talos.dev/v1.10/talos-guides/network/kubespan/).
+
+### Managed DNS service
+
+Uncloud can provide **managed DNS records** like `<service-name>.<cluster-id>.cluster.uncloud.run` for your public
+services through free [Uncloud DNS](https://github.com/psviderski/uncloud-dns) service. You can deploy a service and
+instantly access it from anywhere with a proper DNS name and HTTPS without any manual DNS configuration. This makes
+self-hosting much more accessible and simplifies the process of adding your own domain later.
+
+### No complex orchestration
+
+Uncloud operations are done using **imperative CLI commands** that have the taste of Docker and Docker Compose. The
+deployment and scaling commands can output an execution plan that describes what exactly will be changed on your cluster
+once you approve it. For example, what containers and volumes will be created or removed, and on which machines.
+
+This gives you full visibility and control over every change with **immediate feedback** when something goes wrong.
+
+### Minimal resource footprint
+
+The Uncloud daemon consists of a couple Go and Rust binaries running alongside the Docker daemon on each machine. It
+needs no more than **150 MB of RAM** and a few percent of a CPU core in small setups. This minimal overhead maximises
+the system resources available for your apps.
+
+You can run Uncloud on machines with as little as 512 MB of RAM, assuming you also need some RAM for the OS and Docker,
+as well as the apps you want to run.
+
+### Troubleshooting-friendly
+
+When something goes wrong, you can dive straight into standard Docker containers without layers of abstraction in your
+way. You can also SSH into any machine and use the regular Linux troubleshooting tools. For example, `ping` service
+containers by their service names, `curl` service endpoints, or analyse traffic between containers using `wireshark`.
+
+## Getting started
+
+Install Uncloud CLI and deploy your first app in minutes:
+
+* [Install Uncloud CLI](./2-getting-started/1-install-cli.md)
+* [Deploy demo app](./2-getting-started/2-deploy-demo-app.md)
+
+## Getting help
+
+* **Discord community**: Join our [Discord server](https://discord.gg/eR35KQJhPu) for real-time discussions, support,
+  and updates.
+* **GitHub issues**: Report bugs or request features on our [GitHub repository](https://github.com/psviderski/uncloud).
+* **Documentation**: Browse the full documentation (this website you're on) for detailed guides and references. Use
+  search to find what you need quickly.
+* **Newsletter**: Subscribe to the [newsletter](https://uncloud.run/#subscribe) for development updates and early
+  insights.

docs/docs/2-getting-started/1-install-cli.md

@@ -0,0 +1,104 @@
+# Install CLI
+
+Install the Uncloud command-line utility to manage your machines and deploy apps using `uc` commands. You will run `uc`
+locally so choose the appropriate installation method for your operating system.
+
+:::info NOTE
+
+Windows is not natively supported yet, but you can install and run `uc` in a
+[WSL](https://learn.microsoft.com/en-us/windows/wsl/) terminal by following the instructions for Linux.
+:::
+
+## Homebrew (macOS, Linux)
+
+If you have [Homebrew](https://brew.sh/) package manager installed, this is the recommended installation method on macOS
+and Linux:
+
+```shell
+brew install psviderski/tap/uncloud
+```
+
+To upgrade to the latest version:
+
+```shell
+brew upgrade uncloud
+```
+
+## Install script (macOS, Linux)
+
+For a quick automated installation, use the install script:
+
+```shell
+curl -fsS https://get.uncloud.run/install.sh | sh
+```
+
+The script will:
+
+- Detect your operating system and architecture
+- Download the appropriate latest binary from [GitHub releases](https://github.com/psviderski/uncloud/releases)
+- Install it to `/usr/local/bin/uncloud` using `sudo` (you may need to enter your user password)
+- Create a shortcut `uc` in `/usr/local/bin` for convenience
+
+Don't like `curl | sh`? You can download and review the [install script](https://get.uncloud.run/install.sh) first and
+then run it:
+
+```shell
+curl -fsSO https://get.uncloud.run/install.sh
+cat install.sh
+sh install.sh
+```
+
+## GitHub download (macOS, Linux)
+
+You can manually download and use a pre-built binary from the
+[latest release](https://github.com/psviderski/uncloud/releases/latest) on GitHub.
+
+<Tabs>
+  <TabItem value="macOS (Apple Silicon)">
+    ```shell
+    curl -L https://github.com/psviderski/uncloud/releases/latest/download/uncloud_macos_arm64.tar.gz | tar xz
+    mv uncloud uc
+    ```
+  </TabItem>
+  <TabItem value="macOS (Intel)">
+    ```shell
+    curl -L https://github.com/psviderski/uncloud/releases/latest/download/uncloud_macos_amd64.tar.gz | tar xz
+    mv uncloud uc
+    ```
+  </TabItem>
+  <TabItem value="Linux (AMD 64-bit)">
+    ```shell
+    curl -L https://github.com/psviderski/uncloud/releases/latest/download/uncloud_linux_amd64.tar.gz | tar xz
+    mv uncloud uc
+    ```
+  </TabItem>
+  <TabItem value="Linux (ARM 64-bit)">
+    ```shell
+    curl -L https://github.com/psviderski/uncloud/releases/latest/download/uncloud_linux_arm64.tar.gz | tar xz
+    mv uncloud uc
+    ```
+  </TabItem>
+</Tabs>
+
+You can use the `./uc` binary directly from the current directory, or move it to a directory in your system's `PATH`
+to run it as `uc` from any location.
+
+For example, move it to `/usr/local/bin` which is a common location for user-installed binaries:
+
+```shell
+sudo mv ./uc /usr/local/bin
+```
+
+## Verify installation
+
+After installation, verify that `uc` command is working:
+
+```shell
+uc --version
+```
+
+## Next steps
+
+Now that you have `uc` installed, you're ready to:
+
+- [Deploy demo app](./2-deploy-demo-app.md)

docs/docs/2-getting-started/2-deploy-demo-app.md

@@ -0,0 +1,315 @@
+# Deploy demo app
+
+In this guide, we'll deploy [Excalidraw](https://excalidraw.com) — a popular sketching and diagramming tool — to your
+Linux server. You'll learn the **basics of Uncloud** and see how simple it is to **run web apps** on your own
+infrastructure with secure internet access.
+
+## Prerequisites
+
+Before you begin, you'll need:
+
+- **Uncloud CLI** [installed](1-install-cli.md) on your local machine
+- A **Ubuntu or Debian server** with **public IP address** and **SSH access** (as `root` or a user with `sudo`
+  privileges) using a **private key**.
+
+:::tip Need a server?
+
+A small Virtual Private Server (VPS) or dedicated server from providers like [Hetzner](https://www.hetzner.com) or
+[DigitalOcean](https://www.digitalocean.com) is a great choice for learning Uncloud and running lightweight services. We
+recommend using a freshly installed server as existing services on ports 80 and 443 can cause conflicts.
+
+**Minimum requirements:** 1 vCPU, 512 MB RAM, Ubuntu 22.04 or Debian 11, AMD64 (recommended) or ARM64 architecture.
+Other Linux distributions may work, but haven't been tested yet.
+
+:::
+
+## Set up your server
+
+First, let's turn your server into an Uncloud **machine**. This simply means setting it up so you can deploy and manage
+services on it using `uc`.
+
+```shell
+uc machine init root@<your-server-ip>
+```
+
+If the SSH key to access your server isn't added to your [SSH agent](https://www.ssh.com/academy/ssh/agent), specify it
+with the `-i` flag:
+
+```shell
+uc machine init root@<your-server-ip> -i ~/.ssh/id_xxx
+```
+
+This command will:
+
+- Install the latest stable Docker version on your server if it's not already installed
+- Install the Uncloud daemon on your server
+- Create a Docker network for Uncloud-managed containers
+- Deploy [Caddy](https://caddyserver.com/) as your reverse proxy listening on host ports 80 and 443
+- Reserve a free `xxxxxx.cluster.uncloud.run` subdomain via the Uncloud managed DNS service and point it to your
+  server's IP
+
+All in about a minute!
+
+<details>
+<summary>💡 Expand to see example output</summary>
+
+```
+$ uc machine init root@157.180.72.195
+Downloading Uncloud install script: https://raw.githubusercontent.com/psviderski/uncloud/refs/heads/main/scripts/install.sh
+⏳ Running Uncloud install script...
+⏳ Installing Docker...
+# Executing docker install script, commit: 53a22f61c0628e58e1d6680b49e82993d304b449
++ sh -c apt-get -qq update >/dev/null
++ sh -c DEBIAN_FRONTEND=noninteractive apt-get -y -qq install ca-certificates curl >/dev/null
++ sh -c install -m 0755 -d /etc/apt/keyrings
++ sh -c curl -fsSL "https://download.docker.com/linux/ubuntu/gpg" -o /etc/apt/keyrings/docker.asc
++ sh -c chmod a+r /etc/apt/keyrings/docker.asc
++ sh -c echo "deb [arch=amd64 signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu noble stable" > /etc/apt/sources.list.d/docker.list
++ sh -c apt-get -qq update >/dev/null
++ sh -c DEBIAN_FRONTEND=noninteractive apt-get -y -qq install docker-ce docker-ce-cli containerd.io docker-compose-plugin docker-ce-rootless-extras docker-buildx-plugin >/dev/null
+
+Running kernel seems to be up-to-date.
+
+No services need to be restarted.
+
+No containers need to be restarted.
+
+No user sessions are running outdated binaries.
+
+No VM guests are running outdated hypervisor (qemu) binaries on this host.
++ sh -c docker version
+Client: Docker Engine - Community
+ Version:           28.2.1
+ API version:       1.50
+ Go version:        go1.24.3
+ Git commit:        879ac3f
+ Built:             Wed May 28 19:25:01 2025
+ OS/Arch:           linux/amd64
+ Context:           default
+
+Server: Docker Engine - Community
+ Engine:
+  Version:          28.2.1
+  API version:      1.50 (minimum version 1.24)
+  Go version:       go1.24.3
+  Git commit:       0e2cc22
+  Built:            Wed May 28 19:25:01 2025
+  OS/Arch:          linux/amd64
+  Experimental:     false
+ containerd:
+  Version:          1.7.27
+  GitCommit:        05044ec0a9a75232cad458027ca83437aae3f4da
+ runc:
+  Version:          1.2.5
+  GitCommit:        v1.2.5-0-g59923ef
+ docker-init:
+  Version:          0.19.0
+  GitCommit:        de40ad0
+
+================================================================================
+
+To run Docker as a non-privileged user, consider setting up the
+Docker daemon in rootless mode for your user:
+
+    dockerd-rootless-setuptool.sh install
+
+Visit https://docs.docker.com/go/rootless/ to learn about rootless mode.
+
+
+To run the Docker daemon as a fully privileged service, but granting non-root
+users access, refer to https://docs.docker.com/go/daemon-access/
+
+WARNING: Access to the remote API on a privileged Docker daemon is equivalent
+         to root access on the host. Refer to the 'Docker daemon attack surface'
+         documentation for details: https://docs.docker.com/go/attack-surface/
+
+================================================================================
+
+✓ Docker installed successfully.
+✓ Linux user and group 'uncloud' created.
+⏳ Installing Uncloud binaries...
+⏳ Downloading uncloudd binary: https://github.com/psviderski/uncloud/releases/latest/download/uncloudd_linux_amd64.tar.gz
+✓ uncloudd binary installed: /usr/local/bin/uncloudd
+⏳ Downloading uninstall script: https://raw.githubusercontent.com/psviderski/uncloud/refs/heads/main/scripts/uninstall.sh
+✓ uncloud-uninstall script installed: /usr/local/bin/uncloud-uninstall
+✓ Systemd unit file created: /etc/systemd/system/uncloud.service
+Created symlink /etc/systemd/system/multi-user.target.wants/uncloud.service → /etc/systemd/system/uncloud.service.
+⏳ Downloading uncloud-corrosion binary: https://github.com/psviderski/corrosion/releases/latest/download/corrosion-x86_64-unknown-linux-gnu.tar.gz
+✓ uncloud-corrosion binary installed: /usr/local/bin/uncloud-corrosion
+✓ Systemd unit file created: /etc/systemd/system/uncloud-corrosion.service
+⏳ Starting Uncloud machine daemon (uncloud.service)...
+✓ Uncloud machine daemon started.
+✓ Uncloud installed on the machine successfully! 🎉
+Cluster initialised with machine 'machine-dc3c' and saved as context 'default' in your local config (/Users/spy/.config/uncloud/config.yaml)
+Current cluster context is now 'default'.
+Waiting for the machine to be ready...
+
+Reserved cluster domain: 7za6s7.cluster.uncloud.run
+[+] Deploying service caddy 7/2
+ ✔ Container caddy-d7uk on machine-dc3c     Started                                            6.1s
+   ✔ Image caddy:2.10.0 on machine-dc3c       Pulled                                           3.7s
+
+Updating cluster domain records in Uncloud DNS to point to machines running caddy service...
+[+] Verifying internet access to caddy service 1/1
+ ✔ Machine machine-dc3c (157.180.72.195)  Reachable                                            0.7s
+
+DNS records updated to use only the internet-reachable machines running caddy service:
+  *.7za6s7.cluster.uncloud.run  A → 157.180.72.195
+```
+
+</details>
+
+## Deploy Excalidraw
+
+Now that your machine is set up, let's deploy `excalidraw` service from the
+[official Docker image](https://hub.docker.com/r/excalidraw/excalidraw). The service will publish the container port 80
+as HTTPS endpoint on the previously reserved domain via Caddy.
+
+```shell
+uc run --name excalidraw --publish 80/https excalidraw/excalidraw
+```
+
+You'll the progress of the deployment and the public URL where you can access the service:
+
+```
+[+] Running service excalidraw (replicated mode) 2/2
+ ✔ Container excalidraw-azpc on machine-dc3c  Started                       8.9s
+   ✔ Image excalidraw/excalidraw on machine-dc3c  Pulled                    4.7s
+
+excalidraw endpoints:
+ • https://excalidraw.7za6s7.cluster.uncloud.run → :80
+```
+
+## Verify your deployment
+
+After the service is deployed, use the `uc inspect` command to check its status and details:
+
+```shell
+uc inspect excalidraw
+```
+
+```
+ID:    4d2de1600b6ada221a03896cd388836c
+Name:  excalidraw
+Mode:  replicated
+
+CONTAINER ID   IMAGE                   CREATED              STATUS                        MACHINE
+fde7ac7f11ad   excalidraw/excalidraw   About a minute ago   Up About a minute (healthy)   machine-dc3c
+```
+
+In this example, the service has one container running on the machine `machine-dc3c` (our server). The container is up
+and healthy.
+
+You can also list all deployed services and their public endpoints using the `uc ls` command:
+
+```shell
+uc ls
+```
+
+```
+NAME         MODE         REPLICAS   ENDPOINTS
+caddy        global       1
+excalidraw   replicated   1          https://excalidraw.7za6s7.cluster.uncloud.run → :80
+```
+
+You can see `caddy` service listed here. That's your reverse proxy, running as a regular Uncloud service.
+
+## It's live! Start drawing! ✨
+
+Open your browser and navigate to the URL shown in the endpoints. It may take a moment for Caddy to obtain a TLS
+certificate from Let's Encrypt. If it doesn't load immediately, wait a few seconds and try again.
+
+![Excalidraw running on Uncloud](./img/excalidraw-browser.png)
+
+You now have:
+
+- Your **own Excalidraw instance** running on your server
+- A **public URL** with **automatic HTTPS** you can share with your team and friends
+- **Full control over your data** — no analytics or tracking
+
+## Convert to Docker Compose format
+
+Uncloud supports the [Compose file format](https://docs.docker.com/reference/compose-file/) for defining services. This
+allows you to version control your deployments, share configurations with your team, and deploy complex multi-service
+applications with a single command.
+
+Let's create a `compose.yaml` file in your current directory for the `excalidraw` service we just deployed.
+
+```yaml title="compose.yaml"
+services:
+  excalidraw:
+    image: excalidraw/excalidraw
+    x-ports:
+      - 80/https
+```
+
+:::info note
+
+The `x-ports` key is an Uncloud-specific extension to the Compose file format. It allows you to specify ports that
+should be published as HTTP(S) endpoints. Uncloud automatically configures the reverse proxy (Caddy) to route traffic to
+these ports.
+
+:::
+
+Now deploy it:
+
+```shell
+uc deploy
+```
+
+```
+Services are up to date.
+```
+
+Since `excalidraw` service is already running with the same configuration, Uncloud recognises there's nothing to change.
+We've successfully converted our deployment created with `uc run` to a Compose file.
+
+## Use your own domain
+
+Want to use your own domain, for example, `excalidraw.example.com` instead of `excalidraw.7za6s7.cluster.uncloud.run`?
+
+Add a CNAME record `excalidraw.example.com` in your DNS provider (Cloudflare, Namecheap, etc.) pointing to
+`excalidraw.7za6s7.cluster.uncloud.run`. Alternatively, you can add an A record pointing to your server's IP.
+
+Then update the published port `80/https` in `compose.yaml` to use your domain:
+
+```yaml title="compose.yaml"
+...
+x-ports:
+  - excalidraw.example.com:80/https
+```
+
+Finally, deploy the changes:
+
+```shell
+uc deploy
+```
+
+```
+Deployment plan:
+- Deploy service [name=excalidraw]
+  - machine-dc3c: Run container [image=excalidraw/excalidraw]
+  - machine-dc3c: Remove container [name=excalidraw-azpc]
+
+Do you want to continue?
+
+Choose [y/N]: y
+Chose: Yes!
+
+[+] Deploying services 2/2
+ ✔ Container excalidraw-0z12 on machine-dc3c  Started                       3.5s 
+ ✔ Container excalidraw-azpc on machine-dc3c  Removed                       3.4s 
+```
+
+Notice how Uncloud performed a **zero-downtime deployment** — it started the new container with the updated
+configuration before removing the old one. Your service stayed available throughout the update.
+
+Give it a moment for Caddy to obtain a TLS certificate, then visit https://excalidraw.example.com.
+
+## Clean up
+
+TBD
+
+## Next steps
+
+TBD

docs/docs/2-getting-started/_category_.yaml

@@ -0,0 +1,4 @@
+label: Getting started
+collapsed: false # keep the category open by default
+link:
+  type: generated-index

docs/docusaurus.config.js

@@ -0,0 +1,153 @@
+// @ts-check
+// `@type` JSDoc annotations allow editor autocompletion and type checking
+// (when paired with `@ts-check`).
+// There are various equivalent ways to declare your Docusaurus config.
+// See: https://docusaurus.io/docs/api/docusaurus-config
+
+import {themes as prismThemes} from 'prism-react-renderer';
+
+// This runs in Node.js - Don't use client-side code here (browser APIs, JSX...)
+
+/** @type {import('@docusaurus/types').Config} */
+const config = {
+  title: 'Uncloud Docs',
+  tagline: 'Dinosaurs are cool',
+  favicon: 'img/favicon.png',
+
+  // Set the production url of your site here
+  url: 'https://docs.uncloud.run',
+  // Set the /<baseUrl>/ pathname under which your site is served
+  // For GitHub pages deployment, it is often '/<projectName>/'
+  baseUrl: '/',
+
+  // GitHub pages deployment config.
+  // If you aren't using GitHub pages, you don't need these.
+  organizationName: '', // Usually your GitHub org/user name.
+  projectName: '', // Usually your repo name.
+
+  onBrokenLinks: 'throw',
+  onBrokenMarkdownLinks: 'warn',
+
+  // Even if you don't use internationalization, you can use this field to set
+  // useful metadata like html lang. For example, if your site is Chinese, you
+  // may want to replace "en" with "zh-Hans".
+  i18n: {
+    defaultLocale: 'en',
+    locales: ['en'],
+  },
+
+  themes: [
+    [
+      '@easyops-cn/docusaurus-search-local',
+      /** @type {import("@easyops-cn/docusaurus-search-local").PluginOptions} */
+      ({
+        docsRouteBasePath: '/',
+        hashed: true,
+        highlightSearchTermsOnTargetPage: true,
+      }),
+    ],
+  ],
+  presets: [
+    [
+      'classic',
+      /** @type {import('@docusaurus/preset-classic').Options} */
+      ({
+        docs: {
+          // Remove this to remove the "edit this page" links.
+          editUrl: 'https://github.com/psviderski/uncloud/edit/main/docs/',
+          // Serve the docs at the site's root.
+          routeBasePath: '/',
+          showLastUpdateTime: true,
+          sidebarPath: './sidebars.js',
+        },
+        // blog: {
+        //   showReadingTime: true,
+        //   feedOptions: {
+        //     type: ['rss', 'atom'],
+        //     xslt: true,
+        //   },
+        //   // Please change this to your repo.
+        //   // Remove this to remove the "edit this page" links.
+        //   editUrl:
+        //     'https://github.com/facebook/docusaurus/tree/main/packages/create-docusaurus/templates/shared/',
+        //   // Useful options to enforce blogging best practices
+        //   onInlineTags: 'warn',
+        //   onInlineAuthors: 'warn',
+        //   onUntruncatedBlogPosts: 'warn',
+        // },
+        theme: {
+          customCss: './src/css/custom.css',
+        },
+      }),
+    ],
+  ],
+
+  themeConfig:
+    /** @type {import('@docusaurus/preset-classic').ThemeConfig} */
+    ({
+      colorMode: {
+        // The color mode when user first visits the site.
+        defaultMode: "light",
+        // Whether to use the prefers-color-scheme media-query, using user system preferences,
+        // instead of the hardcoded defaultMode.
+        respectPrefersColorScheme: true,
+      },
+      // The meta image URL for the site (og:image and twitter:image meta tags).
+      // Relative to your site's "static" directory. Cannot be SVGs. Can be external URLs too.
+      image: 'img/social-card.png',
+      navbar: {
+        title: 'Uncloud Docs',
+        logo: {
+          alt: 'Uncloud Logo',
+          src: 'img/logo.svg',
+        },
+        items: [
+          {
+            type: 'search',
+            position: 'right',
+          },
+          {
+            href: 'https://github.com/psviderski/uncloud',
+            label: 'GitHub',
+            position: 'right',
+          },
+        ],
+      },
+      footer: {
+        style: 'light',
+        links: [
+          {
+            title: 'Uncloud',
+            items: [
+              {
+                html: 'Made with ❤️ by <a href="https://github.com/psviderski">@psviderski</a> in Australia'
+              },
+            ],
+          },
+          {
+            title: 'Community',
+            items: [
+              {
+                label: 'Discord',
+                href: 'https://discord.gg/eR35KQJhPu',
+              },
+              {
+                label: 'X',
+                href: 'https://x.com/psviderski',
+              },
+              {
+                label: 'GitHub',
+                href: 'https://github.com/psviderski/uncloud',
+              },
+            ],
+          }
+        ]
+      },
+      prism: {
+        theme: prismThemes.palenight,
+        //darkTheme: prismThemes.dracula,
+      },
+    }),
+};
+
+export default config;

docs/package.json

@@ -0,0 +1,45 @@
+{
+  "name": "docs",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "docusaurus": "docusaurus",
+    "start": "docusaurus start",
+    "build": "docusaurus build",
+    "swizzle": "docusaurus swizzle",
+    "deploy": "docusaurus deploy",
+    "clear": "docusaurus clear",
+    "serve": "docusaurus serve",
+    "write-translations": "docusaurus write-translations",
+    "write-heading-ids": "docusaurus write-heading-ids"
+  },
+  "dependencies": {
+    "@docusaurus/core": "3.7.0",
+    "@docusaurus/preset-classic": "3.7.0",
+    "@easyops-cn/docusaurus-search-local": "^0.49.2",
+    "@mdx-js/react": "^3.0.0",
+    "clsx": "^2.0.0",
+    "prism-react-renderer": "^2.3.0",
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0"
+  },
+  "devDependencies": {
+    "@docusaurus/module-type-aliases": "3.7.0",
+    "@docusaurus/types": "3.7.0"
+  },
+  "browserslist": {
+    "production": [
+      ">0.5%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 3 chrome version",
+      "last 3 firefox version",
+      "last 5 safari version"
+    ]
+  },
+  "engines": {
+    "node": ">=18.0"
+  }
+}

docs/sidebars.js

@@ -0,0 +1,35 @@
+// @ts-check
+
+// This runs in Node.js - Don't use client-side code here (browser APIs, JSX...)
+
+/**
+ * Creating a sidebar enables you to:
+ - create an ordered group of docs
+ - render a sidebar for each doc of that group
+ - provide next/previous navigation
+
+ The sidebars can be generated from the filesystem, or explicitly defined here.
+
+ Create as many sidebars as you want.
+
+ @type {import('@docusaurus/plugin-content-docs').SidebarsConfig}
+ */
+const sidebars = {
+  // By default, Docusaurus generates a sidebar from the docs folder structure
+  sidebar: [{type: 'autogenerated', dirName: '.'}],
+
+  // But you can create a sidebar manually
+  /*
+  tutorialSidebar: [
+    'intro',
+    'hello',
+    {
+      type: 'category',
+      label: 'Tutorial',
+      items: ['tutorial-basics/create-a-document'],
+    },
+  ],
+   */
+};
+
+export default sidebars;

docs/src/css/custom.css

@@ -0,0 +1,40 @@
+/**
+ * Any CSS included here will be global. The classic template
+ * bundles Infima by default. Infima is a CSS framework designed to
+ * work well for content-centric websites.
+ */
+
+@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;700&display=swap');
+
+/* You can override the default Infima variables here. */
+:root {
+  --ifm-font-family-base: 'Inter', sans-serif;
+  --ifm-heading-font-family: 'Inter', sans-serif;
+
+  --ifm-color-primary: #006be6;
+  --ifm-color-primary-dark: #0060cf;
+  --ifm-color-primary-darker: #005bc4;
+  --ifm-color-primary-darkest: #004ba1;
+  --ifm-color-primary-light: #0076fd;
+  --ifm-color-primary-lighter: #0a7cff;
+  --ifm-color-primary-lightest: #2c8eff;
+  --ifm-code-font-size: 95%;
+  --docusaurus-highlighted-code-line-bg: rgba(0, 0, 0, 0.1);
+}
+
+/* For readability concerns, you should choose a lighter palette in dark mode. */
+[data-theme='dark'] {
+  --ifm-color-primary: #3391ee;
+  --ifm-color-primary-dark: #1883ec;
+  --ifm-color-primary-darker: #137be3;
+  --ifm-color-primary-darkest: #1066bb;
+  --ifm-color-primary-light: #4e9ff0;
+  --ifm-color-primary-lighter: #5ba7f1;
+  --ifm-color-primary-lightest: #83bcf5;
+  --docusaurus-highlighted-code-line-bg: rgba(0, 0, 0, 0.3);
+}
+
+.menu {
+  font-size: 0.875rem;
+  font-weight: var(--ifm-font-weight-normal);
+}

docs/src/theme/MDXComponents.js

@@ -0,0 +1,13 @@
+import React from 'react';
+// Import the original mapper
+import MDXComponents from '@theme-original/MDXComponents';
+import Tabs from '@theme/Tabs';
+import TabItem from '@theme/TabItem';
+
+export default {
+    // Re-use the default mapping
+    ...MDXComponents,
+    // Global import the <Tabs> and <TabItem> components
+    Tabs,
+    TabItem,
+};

docs/static/img/logo.svg

@@ -0,0 +1,7 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 80 80">
+    <g>
+        <rect x="0" y="0" width="80" height="80" rx="10" fill="#18181B"/>
+        <path d="M20 32 L20 48 L36 48 L36 32 M60 32 L45 32 L45 48 L60 48" stroke="white" stroke-width="6" fill="none"
+              stroke-linecap="square" stroke-linejoin="miter"/>
+    </g>
+</svg>

go.mod

@@ -36,6 +36,7 @@ require (
 	github.com/ipfs/go-log/v2 v2.5.1
 	github.com/jmoiron/sqlx v1.4.0
 	github.com/lmittmann/tint v1.0.5
+	github.com/miekg/dns v1.1.65
 	github.com/opencontainers/go-digest v1.0.0
 	github.com/opencontainers/image-spec v1.1.0
 	github.com/siderolabs/discovery-api v0.1.4
@@ -46,9 +47,9 @@ require (
 	github.com/vishvananda/netlink v1.3.0
 	go.uber.org/zap v1.27.0
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
-	golang.org/x/crypto v0.32.0
+	golang.org/x/crypto v0.33.0
-	golang.org/x/net v0.34.0
+	golang.org/x/net v0.35.0
-	golang.org/x/sync v0.10.0
+	golang.org/x/sync v0.11.0
 	golang.org/x/sys v0.31.0
 	golang.zx2c4.com/wireguard v0.0.0-20231211153847-12269c276173
 	golang.zx2c4.com/wireguard/wgctrl v0.0.0-20230429144221-925a1e7659e6
@@ -197,7 +198,6 @@ require (
 	github.com/mdlayher/socket v0.5.1 // indirect
 	github.com/mgutz/ansi v0.0.0-20200706080929-d51e80ef957d // indirect
 	github.com/mholt/acmez/v2 v2.0.3 // indirect
-	github.com/miekg/dns v1.1.62 // indirect
 	github.com/miekg/pkcs11 v1.1.1 // indirect
 	github.com/minio/sha256-simd v1.0.1 // indirect
 	github.com/mitchellh/cli v1.1.5 // indirect
@@ -213,6 +213,8 @@ require (
 	github.com/moby/patternmatcher v0.6.0 // indirect
 	github.com/moby/sys/sequential v0.6.0 // indirect
 	github.com/moby/sys/signal v0.7.1 // indirect
+	github.com/moby/sys/user v0.3.0 // indirect
+	github.com/moby/sys/userns v0.1.0 // indirect
 	github.com/moby/term v0.5.0 // indirect
 	github.com/morikuni/aec v1.0.0 // indirect
 	github.com/mr-tron/base58 v1.2.0 // indirect
@@ -303,11 +305,11 @@ require (
 	go.uber.org/zap/exp v0.2.0 // indirect
 	golang.org/x/crypto/x509roots/fallback v0.0.0-20240507223354-67b13616a595 // indirect
 	golang.org/x/exp v0.0.0-20241215155358-4a5509556b9e // indirect
-	golang.org/x/mod v0.22.0 // indirect
+	golang.org/x/mod v0.23.0 // indirect
-	golang.org/x/term v0.28.0 // indirect
+	golang.org/x/term v0.29.0 // indirect
-	golang.org/x/text v0.21.0 // indirect
+	golang.org/x/text v0.22.0 // indirect
 	golang.org/x/time v0.8.0 // indirect
-	golang.org/x/tools v0.29.0 // indirect
+	golang.org/x/tools v0.30.0 // indirect
 	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 // indirect
 	google.golang.org/genproto v0.0.0-20240401170217-c3f982113cda // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20241209162323-e6fa225c2576 // indirect

go.sum

@@ -721,8 +721,8 @@ github.com/mholt/acmez/v2 v2.0.3 h1:CgDBlEwg3QBp6s45tPQmFIBrkRIkBT4rW4orMM6p4sw=
 github.com/mholt/acmez/v2 v2.0.3/go.mod h1:pQ1ysaDeGrIMvJ9dfJMk5kJNkn7L2sb3UhyrX6Q91cw=
 github.com/miekg/dns v1.1.26/go.mod h1:bPDLeHnStXmXAq1m/Ch/hvfNHr14JKNPMBo3VZKjuso=
 github.com/miekg/dns v1.1.41/go.mod h1:p6aan82bvRIyn+zDIv9xYNUpwa73JcSh9BKwknJysuI=
-github.com/miekg/dns v1.1.62 h1:cN8OuEF1/x5Rq6Np+h1epln8OiyPWV+lROx9LxcGgIQ=
+github.com/miekg/dns v1.1.65 h1:0+tIPHzUW0GCge7IiK3guGP57VAw7hoPDfApjkMD1Fc=
-github.com/miekg/dns v1.1.62/go.mod h1:mvDlcItzm+br7MToIKqkglaGhlFMHJ9DTNNWONWXbNQ=
+github.com/miekg/dns v1.1.65/go.mod h1:Dzw9769uoKVaLuODMDZz9M6ynFU6Em65csPuoi8G0ck=
 github.com/miekg/pkcs11 v1.0.2/go.mod h1:XsNlhZGX73bx86s2hdc/FuaLm2CPZJemRLMA+WTFxgs=
 github.com/miekg/pkcs11 v1.1.1 h1:Ugu9pdy6vAYku5DEpVWVFPYnzV+bxB+iRdbuFSu7TvU=
 github.com/miekg/pkcs11 v1.1.1/go.mod h1:XsNlhZGX73bx86s2hdc/FuaLm2CPZJemRLMA+WTFxgs=
@@ -1196,8 +1196,8 @@ golang.org/x/crypto v0.0.0-20210711020723-a769d52b0f97/go.mod h1:GvvjBRRGRdwPK5y
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.3.0/go.mod h1:hebNnKkNXi2UzZN1eVRvBB7co0a+JxK6XbPiWVs/3J4=
 golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
-golang.org/x/crypto v0.32.0 h1:euUpcYgM8WcP71gNpTqQCn6rC2t6ULUPiOzfWaXVVfc=
+golang.org/x/crypto v0.33.0 h1:IOBPskki6Lysi0lo9qQvbxiQ+FvsCC/YWOecCHAixus=
-golang.org/x/crypto v0.32.0/go.mod h1:ZnnJkOaASj8g0AjIduWNlq2NRxL0PlBrbKVyZ6V/Ugc=
+golang.org/x/crypto v0.33.0/go.mod h1:bVdXmD7IV/4GdElGPozy6U7lWdRXA4qyRVGJV57uQ5M=
 golang.org/x/crypto/x509roots/fallback v0.0.0-20240507223354-67b13616a595 h1:TgSqweA595vD0Zt86JzLv3Pb/syKg8gd5KMGGbJPYFw=
 golang.org/x/crypto/x509roots/fallback v0.0.0-20240507223354-67b13616a595/go.mod h1:kNa9WdvYnzFwC79zRpLRMJbdEFlhyM5RPFBBZp/wWH8=
 golang.org/x/exp v0.0.0-20190121172915-509febef88a4/go.mod h1:CJ0aWSM057203Lf6IL+f9T1iT9GByDxfZKAQTCR3kQA=
@@ -1214,8 +1214,8 @@ golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
-golang.org/x/mod v0.22.0 h1:D4nJWe9zXqHOmWqj4VMOJhvzj7bEZg4wEYa759z1pH4=
+golang.org/x/mod v0.23.0 h1:Zb7khfcRGKk+kqfxFaP5tZqCnDZMjC5VtUBs87Hr6QM=
-golang.org/x/mod v0.22.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
+golang.org/x/mod v0.23.0/go.mod h1:6SkKJ3Xj0I0BrPOZoBy3bdMptDDU9oJrpohJ3eWZ1fY=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -1237,8 +1237,8 @@ golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug
 golang.org/x/net v0.2.0/go.mod h1:KqCZLdyyvdV855qA2rE3GC2aiw5xGR5TEjj8smXukLY=
 golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
 golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
-golang.org/x/net v0.34.0 h1:Mb7Mrk043xzHgnRM88suvJFwzVrRfHEHJEl5/71CKw0=
+golang.org/x/net v0.35.0 h1:T5GQRQb2y08kTAByq9L4/bz8cipCdA8FbRTXewonqY8=
-golang.org/x/net v0.34.0/go.mod h1:di0qlW3YNM5oh6GqDGQr92MyTozJPmybPK4Ev/Gm31k=
+golang.org/x/net v0.35.0/go.mod h1:EglIi67kWsHKlRzzVMUD93VMSWGFOMSZgxFjparz1Qk=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.24.0 h1:KTBBxWqUa0ykRPLtV69rRto9TLXcqYkeswu48x/gvNE=
 golang.org/x/oauth2 v0.24.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
@@ -1252,8 +1252,8 @@ golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
-golang.org/x/sync v0.10.0 h1:3NQrjDixjgGwUOCaF8w2+VYHv0Ve/vGYSbdkTa98gmQ=
+golang.org/x/sync v0.11.0 h1:GGz8+XQP4FvTTrjZPzNKTMFtSXH80RAzG+5ghFPgK9w=
-golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sync v0.11.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sys v0.0.0-20180823144017-11551d06cbcc/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180830151530-49385e6e1522/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -1310,8 +1310,8 @@ golang.org/x/term v0.2.0/go.mod h1:TVmDHMZPmdnySmBfhjOoOdhjzdE1h4u1VwSiw2l1Nuc=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
 golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
 golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
-golang.org/x/term v0.28.0 h1:/Ts8HFuMR2E6IP/jlo7QVLZHggjKQbhu/7H0LJFr3Gg=
+golang.org/x/term v0.29.0 h1:L6pJp37ocefwRRtYPKSWOWzOtWSxVajvz2ldH/xi3iU=
-golang.org/x/term v0.28.0/go.mod h1:Sw/lC2IAUZ92udQNf3WodGtn4k/XoLyZoh8v/8uiwek=
+golang.org/x/term v0.29.0/go.mod h1:6bl4lRlvVuDgSf3179VpIxBF0o10JUpXWOnI7nErv7s=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
@@ -1322,8 +1322,8 @@ golang.org/x/text v0.4.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/text v0.7.0/go.mod h1:mrYo+phRRbMaCq/xk9113O4dZlRixOauAjOtrjsXDZ8=
 golang.org/x/text v0.9.0/go.mod h1:e1OnstbJyHTd6l/uOt8jFFHp6TRDWZR/bV3emEE/zU8=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
-golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
-golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
+golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
 golang.org/x/time v0.8.0 h1:9i3RxcPv3PZnitoVGMPDKZSq1xW1gK1Xy3ArNOGZfEg=
 golang.org/x/time v0.8.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
@@ -1345,8 +1345,8 @@ golang.org/x/tools v0.0.0-20210106214847-113979e3529a/go.mod h1:emZCQorbCU4vsT4f
 golang.org/x/tools v0.1.5/go.mod h1:o0xws9oXOQQZyjljx8fwUC0k7L1pTE6eaCbjGeHmOkk=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
-golang.org/x/tools v0.29.0 h1:Xx0h3TtM9rzQpQuR4dKLrdglAmCEN5Oi+P74JdhdzXE=
+golang.org/x/tools v0.30.0 h1:BgcpHewrV5AUp2G9MebG4XPFI1E2W41zU1SaqVA9vJY=
-golang.org/x/tools v0.29.0/go.mod h1:KMQVMRsVxU6nHCFXrBPhDB8XncLNLM0lIy/F14RP588=
+golang.org/x/tools v0.30.0/go.mod h1:c347cR/OJfw5TI+GfX7RUPNMdDRRbjvYTS0jPyvsVtY=
 golang.org/x/xerrors v0.0.0-20190410155217-1f06c39b4373/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20190513163551-3ee3066db522/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=

internal/cli/build.go

@@ -0,0 +1,197 @@
+package cli
+
+import (
+	"context"
+	"encoding/base64"
+	"encoding/json"
+	"fmt"
+	"io"
+	"os"
+
+	composetypes "github.com/compose-spec/compose-go/v2/types"
+	"github.com/distribution/reference"
+	"github.com/docker/cli/cli/config"
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/image"
+	dockerclient "github.com/docker/docker/client"
+	"github.com/docker/docker/pkg/archive"
+	"github.com/docker/docker/registry"
+)
+
+type BuildOptions struct {
+	Files    []string
+	Profiles []string
+	Services []string
+	Push     bool
+	NoCache  bool
+}
+
+// GetServicesThatNeedBuild returns a map of services that require building
+func GetServicesThatNeedBuild(project *composetypes.Project) map[string]composetypes.ServiceConfig {
+	servicesToBuild := make(map[string]composetypes.ServiceConfig, len(project.Services))
+	for serviceName, service := range project.Services {
+		if service.Build == nil {
+			continue
+		}
+		servicesToBuild[serviceName] = service
+	}
+	return servicesToBuild
+}
+
+// BuildServices builds the services defined in the provided map.
+func BuildServices(ctx context.Context, servicesToBuild map[string]composetypes.ServiceConfig, opts BuildOptions) error {
+	fmt.Println("Building services...")
+
+	// Init docker client (can be local or remote, depending on DOCKER_HOST environment variable)
+	dockerCli, err := dockerclient.NewClientWithOpts(dockerclient.FromEnv, dockerclient.WithAPIVersionNegotiation())
+	if err != nil {
+		return err
+	}
+	defer dockerCli.Close()
+
+	serviceImages := make(map[string]string, len(servicesToBuild))
+
+	// Build the services using the local docker client and compose libraries
+	for _, service := range servicesToBuild {
+		fmt.Printf("Building service: %s\n", service.Name)
+		imageName, err := buildSingleService(ctx, dockerCli, service, opts)
+		if err != nil {
+			return fmt.Errorf("build service %s: %w", service.Name, err)
+		}
+		serviceImages[service.Name] = imageName
+	}
+	fmt.Printf("Service images are built.\n")
+
+	if opts.Push {
+		err = pushServiceImages(ctx, dockerCli, serviceImages)
+	}
+
+	return err
+}
+
+// buildSingleService builds a single service using the Docker client and Compose libraries.
+func buildSingleService(ctx context.Context, dockerCli *dockerclient.Client, service composetypes.ServiceConfig, opts BuildOptions) (string, error) {
+	if service.Build == nil {
+		return "", fmt.Errorf("service %s has no build configuration", service.Name)
+	}
+	if service.Image == "" {
+		return "", fmt.Errorf("service %s has no image specified; building services without image is not supported yet", service.Name)
+	}
+
+	buildContextPath := service.Build.Context
+	imageName := service.Image
+
+	// Create a tar archive of the build context
+	buildContext, err := archive.TarWithOptions(buildContextPath, &archive.TarOptions{})
+	if err != nil {
+		return "", fmt.Errorf("failed to create build context for service %s: %w", service.Name, err)
+	}
+
+	buildOptions := types.ImageBuildOptions{
+		// TODO: Support Dockerfiles outside the build context
+		// See https://github.com/docker/compose/blob/cf89fd1aa1328d5af77658ccc5a1e1b29981ae80/pkg/compose/build_classic.go#L92
+		Dockerfile: service.Build.Dockerfile,
+		Tags:       []string{imageName},
+		Remove:     true, // Remove intermediate containers
+		NoCache:    opts.NoCache,
+	}
+
+	buildResponse, err := dockerCli.ImageBuild(ctx, buildContext, buildOptions)
+	if err != nil {
+		return "", fmt.Errorf("failed to build image for service %s: %w", service.Name, err)
+	}
+	defer buildResponse.Body.Close()
+
+	// Print the build output
+	decoder := json.NewDecoder(buildResponse.Body)
+	for {
+		var message map[string]interface{}
+		if err := decoder.Decode(&message); err == io.EOF {
+			break
+		} else if err != nil {
+			return "", fmt.Errorf("failed to decode build output for service %s: %w", service.Name, err)
+		}
+
+		if stream, ok := message["stream"]; ok {
+			fmt.Print(stream)
+		}
+	}
+
+	return imageName, nil
+}
+
+// pushSingleServiceImage pushes a single service image.
+func pushSingleServiceImage(ctx context.Context, dockerCli *dockerclient.Client, serviceName string, imageName string) error {
+	ref, err := reference.ParseNormalizedNamed(imageName)
+	if err != nil {
+		return err
+	}
+
+	repoInfo, err := registry.ParseRepositoryInfo(ref)
+	if err != nil {
+		return err
+	}
+
+	registryKey := repoInfo.Index.Name
+	if repoInfo.Index.Official {
+		registryKey = registry.IndexServer
+	}
+
+	// Load the Docker config file with auth details, if available
+	configFile := config.LoadDefaultConfigFile(os.Stderr)
+
+	authConfig, err := configFile.GetAuthConfig(registryKey)
+	if err != nil {
+		return err
+	}
+
+	authJSON, err := json.Marshal(authConfig)
+	if err != nil {
+		return fmt.Errorf("failed to marshal auth config for registry %s: %w", registryKey, err)
+	}
+
+	authStr := base64.URLEncoding.EncodeToString(authJSON)
+
+	pushOptions := image.PushOptions{
+		RegistryAuth: authStr,
+	}
+	pushResponse, err := dockerCli.ImagePush(ctx, imageName, pushOptions)
+	if err != nil {
+		return fmt.Errorf("failed to push image %s: %w", imageName, err)
+	}
+	defer pushResponse.Close()
+
+	fmt.Printf("Pushing image %s for service %s\n", imageName, serviceName)
+
+	// Handle output and errors
+	decoder := json.NewDecoder(pushResponse)
+	for {
+		var message map[string]interface{}
+		if err := decoder.Decode(&message); err == io.EOF {
+			break
+		} else if err != nil {
+			return fmt.Errorf("failed to decode push output for image %s: %w", imageName, err)
+		}
+		if stream, ok := message["stream"]; ok {
+			fmt.Print(stream)
+		} else if errorMessage, ok := message["error"]; ok {
+			return fmt.Errorf("error pushing image %s: %s", imageName, errorMessage)
+		} else if status, ok := message["status"]; ok {
+			fmt.Printf("   %s\n", status)
+		}
+	}
+
+	fmt.Printf("Image %s pushed successfully.\n", imageName)
+	return nil
+}
+
+// pushServiceImages pushes all built service images to the registry.
+func pushServiceImages(ctx context.Context, dockerCli *dockerclient.Client, serviceImages map[string]string) error {
+	fmt.Printf("Pushing images...\n")
+	for serviceName, imageName := range serviceImages {
+		if err := pushSingleServiceImage(ctx, dockerCli, serviceName, imageName); err != nil {
+			return fmt.Errorf("push image for service %s: %w", serviceName, err)
+		}
+	}
+	return nil
+}

internal/cli/cli.go

@@ -7,6 +7,7 @@ import (
 	"net/netip"
 	"os"
 
+	"github.com/charmbracelet/huh"
 	"github.com/docker/cli/cli/streams"
 	"github.com/psviderski/uncloud/internal/cli/config"
 	"github.com/psviderski/uncloud/internal/fs"
@@ -16,8 +17,8 @@ import (
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/psviderski/uncloud/pkg/client"
 	"github.com/psviderski/uncloud/pkg/client/connector"
-
+	"google.golang.org/grpc/codes"
-	"github.com/charmbracelet/huh"
+	"google.golang.org/grpc/status"
 	"google.golang.org/protobuf/types/known/emptypb"
 )
 
@@ -194,6 +195,17 @@ func (cli *CLI) initRemoteMachine(ctx context.Context, opts InitClusterOptions)
 		}
 	}
 
+	// Check machine meets all necessary system requirements before proceeding.
+	checkResp, err := machineClient.CheckPrerequisites(ctx, &emptypb.Empty{})
+	// TODO(lhf): remove Unimplemented check when v0.9.0 is released.
+	if err != nil {
+		if status.Convert(err).Code() != codes.Unimplemented {
+			return nil, fmt.Errorf("check machine prerequisites: %w", err)
+		}
+	} else if !checkResp.Satisfied {
+		return nil, fmt.Errorf("machine prerequisites not satisfied: %s", checkResp.Error)
+	}
+
 	req := &pb.InitClusterRequest{
 		MachineName: opts.MachineName,
 		Network:     pb.NewIPPrefix(opts.Network),
@@ -241,22 +253,28 @@ type AddMachineOptions struct {
 	Version       string
 }
 
-// AddMachine provisions a remote machine and adds it to the cluster. It returns a client to interact with the machine
+// AddMachine provisions a remote machine and adds it to the cluster. It returns a cluster client and a machine client.
-// which should be closed after use by the caller.
+// The cluster client is connected to the existing machine in the cluster. It was used to add the new machine to the
-func (cli *CLI) AddMachine(ctx context.Context, opts AddMachineOptions) (*client.Client, error) {
+// cluster. The machine client is connected to the new machine and can be used to interact with it.
+// Both client should be closed after use by the caller.
+func (cli *CLI) AddMachine(ctx context.Context, opts AddMachineOptions) (*client.Client, *client.Client, error) {
 	contextName := opts.Context
 	if contextName == "" {
 		contextName = cli.Config.CurrentContext
 	}
 	c, err := cli.ConnectCluster(ctx, contextName)
 	if err != nil {
-		return nil, fmt.Errorf("connect to cluster (context '%s'): %w", contextName, err)
+		return nil, nil, fmt.Errorf("connect to cluster (context '%s'): %w", contextName, err)
 	}
-	defer c.Close()
+	defer func() {
+		if err != nil {
+			c.Close()
+		}
+	}()
 
 	machineClient, err := cli.provisionRemoteMachine(ctx, opts.RemoteMachine, opts.Version)
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 	defer func() {
 		if err != nil {
@@ -267,21 +285,32 @@ func (cli *CLI) AddMachine(ctx context.Context, opts AddMachineOptions) (*client
 	// Check if the machine is already initialised as a cluster member and prompt the user to reset it first.
 	minfo, err := machineClient.Inspect(ctx, &emptypb.Empty{})
 	if err != nil {
-		return nil, fmt.Errorf("inspect machine: %w", err)
+		return nil, nil, fmt.Errorf("inspect machine: %w", err)
 	}
 	if minfo.Id != "" {
 		if err = cli.promptResetMachine(); err != nil {
-			return nil, err
+			return nil, nil, err
 		}
 	}
 
+	// Check machine meets all necessary system requirements before proceeding.
+	checkResp, err := machineClient.CheckPrerequisites(ctx, &emptypb.Empty{})
+	// TODO(lhf): remove Unimplemented check when v0.9.0 is released.
+	if err != nil {
+		if status.Convert(err).Code() != codes.Unimplemented {
+			return nil, nil, fmt.Errorf("check machine prerequisites: %w", err)
+		}
+	} else if !checkResp.Satisfied {
+		return nil, nil, fmt.Errorf("machine prerequisites not satisfied: %s", checkResp.Error)
+	}
+
 	tokenResp, err := machineClient.Token(ctx, &emptypb.Empty{})
 	if err != nil {
-		return nil, fmt.Errorf("get remote machine token: %w", err)
+		return nil, nil, fmt.Errorf("get remote machine token: %w", err)
 	}
 	token, err := machine.ParseToken(tokenResp.Token)
 	if err != nil {
-		return nil, fmt.Errorf("parse remote machine token: %w", err)
+		return nil, nil, fmt.Errorf("parse remote machine token: %w", err)
 	}
 
 	// Register the machine in the cluster using its public key and endpoints from the token.
@@ -307,13 +336,13 @@ func (cli *CLI) AddMachine(ctx context.Context, opts AddMachineOptions) (*client
 
 	addResp, err := c.AddMachine(ctx, addReq)
 	if err != nil {
-		return nil, fmt.Errorf("add machine to cluster (context '%s'): %w", contextName, err)
+		return nil, nil, fmt.Errorf("add machine to cluster (context '%s'): %w", contextName, err)
 	}
 
 	// List other machines in the cluster to include them in the join request.
 	machines, err := c.ListMachines(ctx, nil)
 	if err != nil {
-		return nil, fmt.Errorf("list cluster machines: %w", err)
+		return nil, nil, fmt.Errorf("list cluster machines: %w", err)
 	}
 	otherMachines := make([]*pb.MachineInfo, 0, len(machines)-1)
 	for _, m := range machines {
@@ -328,7 +357,7 @@ func (cli *CLI) AddMachine(ctx context.Context, opts AddMachineOptions) (*client
 		OtherMachines: otherMachines,
 	}
 	if _, err = machineClient.JoinCluster(ctx, joinReq); err != nil {
-		return nil, fmt.Errorf("join cluster: %w", err)
+		return nil, nil, fmt.Errorf("join cluster: %w", err)
 	}
 
 	// TODO: fix empty context name when using the current context (contextName == "").
@@ -344,10 +373,10 @@ func (cli *CLI) AddMachine(ctx context.Context, opts AddMachineOptions) (*client
 	}
 	cli.Config.Contexts[contextName].Connections = append(cli.Config.Contexts[contextName].Connections, connCfg)
 	if err = cli.Config.Save(); err != nil {
-		return nil, fmt.Errorf("save config: %w", err)
+		return nil, nil, fmt.Errorf("save config: %w", err)
 	}
 
-	return machineClient, nil
+	return c, machineClient, nil
 }
 
 // provisionRemoteMachine installs the Uncloud daemon and dependencies on the remote machine over SSH and returns
@@ -403,7 +432,7 @@ func (cli *CLI) promptResetMachine() error {
 				Negative("No").
 				Value(&confirm),
 		),
-	)
+	).WithAccessible(true)
 	if err := form.Run(); err != nil {
 		return fmt.Errorf("prompt user to confirm: %w", err)
 	}

internal/cli/prompt.go

@@ -14,7 +14,7 @@ func Confirm() (bool, error) {
 				Negative("No").
 				Value(&confirmed),
 		),
-	)
+	).WithAccessible(true)
 	if err := form.Run(); err != nil {
 		return false, err
 	}

internal/log/handler.go

@@ -45,11 +45,19 @@ func (h *SlogTextHandler) Enabled(ctx context.Context, level slog.Level) bool {
 }
 
 func (h *SlogTextHandler) WithAttrs(attrs []slog.Attr) slog.Handler {
-	return h.TextHandler.WithAttrs(attrs)
+	return &SlogTextHandler{
+		TextHandler: h.TextHandler.WithAttrs(attrs).(*slog.TextHandler),
+		opts:        h.opts,
+		w:           h.w,
+	}
 }
 
 func (h *SlogTextHandler) WithGroup(name string) slog.Handler {
-	return h.TextHandler.WithGroup(name)
+	return &SlogTextHandler{
+		TextHandler: h.TextHandler.WithGroup(name).(*slog.TextHandler),
+		opts:        h.opts,
+		w:           h.w,
+	}
 }
 
 func (h *SlogTextHandler) Handle(ctx context.Context, r slog.Record) error {

internal/machine/api/pb/machine.pb.go

@@ -21,6 +21,63 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
+type CheckPrerequisitesResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// Overall status of the checks.
+	Satisfied bool `protobuf:"varint,1,opt,name=satisfied,proto3" json:"satisfied,omitempty"`
+	// Error message if not satisfied (empty if all checks pass).
+	Error string `protobuf:"bytes,2,opt,name=error,proto3" json:"error,omitempty"`
+}
+
+func (x *CheckPrerequisitesResponse) Reset() {
+	*x = CheckPrerequisitesResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CheckPrerequisitesResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CheckPrerequisitesResponse) ProtoMessage() {}
+
+func (x *CheckPrerequisitesResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CheckPrerequisitesResponse.ProtoReflect.Descriptor instead.
+func (*CheckPrerequisitesResponse) Descriptor() ([]byte, []int) {
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *CheckPrerequisitesResponse) GetSatisfied() bool {
+	if x != nil {
+		return x.Satisfied
+	}
+	return false
+}
+
+func (x *CheckPrerequisitesResponse) GetError() string {
+	if x != nil {
+		return x.Error
+	}
+	return ""
+}
+
 type MachineInfo struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -35,7 +92,7 @@ type MachineInfo struct {
 func (x *MachineInfo) Reset() {
 	*x = MachineInfo{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[0]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[1]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -48,7 +105,7 @@ func (x *MachineInfo) String() string {
 func (*MachineInfo) ProtoMessage() {}
 
 func (x *MachineInfo) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[0]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[1]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -61,7 +118,7 @@ func (x *MachineInfo) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use MachineInfo.ProtoReflect.Descriptor instead.
 func (*MachineInfo) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{0}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{1}
 }
 
 func (x *MachineInfo) GetId() string {
@@ -106,7 +163,7 @@ type NetworkConfig struct {
 func (x *NetworkConfig) Reset() {
 	*x = NetworkConfig{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[1]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[2]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -119,7 +176,7 @@ func (x *NetworkConfig) String() string {
 func (*NetworkConfig) ProtoMessage() {}
 
 func (x *NetworkConfig) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[1]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[2]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -132,7 +189,7 @@ func (x *NetworkConfig) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use NetworkConfig.ProtoReflect.Descriptor instead.
 func (*NetworkConfig) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{1}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{2}
 }
 
 func (x *NetworkConfig) GetSubnet() *IPPrefix {
@@ -180,7 +237,7 @@ type InitClusterRequest struct {
 func (x *InitClusterRequest) Reset() {
 	*x = InitClusterRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[2]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[3]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -193,7 +250,7 @@ func (x *InitClusterRequest) String() string {
 func (*InitClusterRequest) ProtoMessage() {}
 
 func (x *InitClusterRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[2]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[3]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -206,7 +263,7 @@ func (x *InitClusterRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use InitClusterRequest.ProtoReflect.Descriptor instead.
 func (*InitClusterRequest) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{2}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{3}
 }
 
 func (x *InitClusterRequest) GetMachineName() string {
@@ -271,7 +328,7 @@ type InitClusterResponse struct {
 func (x *InitClusterResponse) Reset() {
 	*x = InitClusterResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[3]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[4]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -284,7 +341,7 @@ func (x *InitClusterResponse) String() string {
 func (*InitClusterResponse) ProtoMessage() {}
 
 func (x *InitClusterResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[3]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[4]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -297,7 +354,7 @@ func (x *InitClusterResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use InitClusterResponse.ProtoReflect.Descriptor instead.
 func (*InitClusterResponse) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{3}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{4}
 }
 
 func (x *InitClusterResponse) GetMachine() *MachineInfo {
@@ -319,7 +376,7 @@ type JoinClusterRequest struct {
 func (x *JoinClusterRequest) Reset() {
 	*x = JoinClusterRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[4]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[5]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -332,7 +389,7 @@ func (x *JoinClusterRequest) String() string {
 func (*JoinClusterRequest) ProtoMessage() {}
 
 func (x *JoinClusterRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[4]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[5]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -345,7 +402,7 @@ func (x *JoinClusterRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use JoinClusterRequest.ProtoReflect.Descriptor instead.
 func (*JoinClusterRequest) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{4}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{5}
 }
 
 func (x *JoinClusterRequest) GetMachine() *MachineInfo {
@@ -373,7 +430,7 @@ type TokenResponse struct {
 func (x *TokenResponse) Reset() {
 	*x = TokenResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[5]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[6]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -386,7 +443,7 @@ func (x *TokenResponse) String() string {
 func (*TokenResponse) ProtoMessage() {}
 
 func (x *TokenResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[5]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[6]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -399,7 +456,7 @@ func (x *TokenResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use TokenResponse.ProtoReflect.Descriptor instead.
 func (*TokenResponse) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{5}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{6}
 }
 
 func (x *TokenResponse) GetToken() string {
@@ -423,7 +480,7 @@ type Service struct {
 func (x *Service) Reset() {
 	*x = Service{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[6]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[7]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -436,7 +493,7 @@ func (x *Service) String() string {
 func (*Service) ProtoMessage() {}
 
 func (x *Service) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[6]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[7]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -449,7 +506,7 @@ func (x *Service) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Service.ProtoReflect.Descriptor instead.
 func (*Service) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{6}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{7}
 }
 
 func (x *Service) GetId() string {
@@ -491,7 +548,7 @@ type InspectServiceRequest struct {
 func (x *InspectServiceRequest) Reset() {
 	*x = InspectServiceRequest{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[7]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[8]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -504,7 +561,7 @@ func (x *InspectServiceRequest) String() string {
 func (*InspectServiceRequest) ProtoMessage() {}
 
 func (x *InspectServiceRequest) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[7]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[8]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -517,7 +574,7 @@ func (x *InspectServiceRequest) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use InspectServiceRequest.ProtoReflect.Descriptor instead.
 func (*InspectServiceRequest) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{7}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{8}
 }
 
 func (x *InspectServiceRequest) GetId() string {
@@ -538,7 +595,7 @@ type InspectServiceResponse struct {
 func (x *InspectServiceResponse) Reset() {
 	*x = InspectServiceResponse{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[8]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[9]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -551,7 +608,7 @@ func (x *InspectServiceResponse) String() string {
 func (*InspectServiceResponse) ProtoMessage() {}
 
 func (x *InspectServiceResponse) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[8]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[9]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -564,7 +621,7 @@ func (x *InspectServiceResponse) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use InspectServiceResponse.ProtoReflect.Descriptor instead.
 func (*InspectServiceResponse) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{8}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{9}
 }
 
 func (x *InspectServiceResponse) GetService() *Service {
@@ -587,7 +644,7 @@ type Service_Container struct {
 func (x *Service_Container) Reset() {
 	*x = Service_Container{}
 	if protoimpl.UnsafeEnabled {
-		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[9]
+		mi := &file_internal_machine_api_pb_machine_proto_msgTypes[10]
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		ms.StoreMessageInfo(mi)
 	}
@@ -600,7 +657,7 @@ func (x *Service_Container) String() string {
 func (*Service_Container) ProtoMessage() {}
 
 func (x *Service_Container) ProtoReflect() protoreflect.Message {
-	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[9]
+	mi := &file_internal_machine_api_pb_machine_proto_msgTypes[10]
 	if protoimpl.UnsafeEnabled && x != nil {
 		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
 		if ms.LoadMessageInfo() == nil {
@@ -613,7 +670,7 @@ func (x *Service_Container) ProtoReflect() protoreflect.Message {
 
 // Deprecated: Use Service_Container.ProtoReflect.Descriptor instead.
 func (*Service_Container) Descriptor() ([]byte, []int) {
-	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{6, 0}
+	return file_internal_machine_api_pb_machine_proto_rawDescGZIP(), []int{7, 0}
 }
 
 func (x *Service_Container) GetMachineId() string {
@@ -640,96 +697,106 @@ var file_internal_machine_api_pb_machine_proto_rawDesc = []byte{
 	0x70, 0x74, 0x79, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x1a, 0x24, 0x69, 0x6e, 0x74, 0x65, 0x72,
 	0x6e, 0x61, 0x6c, 0x2f, 0x6d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x2f, 0x61, 0x70, 0x69, 0x2f,
 	0x70, 0x62, 0x2f, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x22,
-	0x85, 0x01, 0x0a, 0x0b, 0x4d, 0x61, 0x63, 0x68, 0x69, 0x6e, 0x65, 0x49, 0x6e, 0x66, 0x6f, 0x12,
+	0x50, 0x0a, 0x1a, 0x43, 0x68, 0x65, 0x63, 0x6b, 0x50, 0x72, 0x65, 0x72, 0x65, 0x71, 0x75, 0x69,
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 }
 
 var (
@@ -744,48 +811,51 @@ func file_internal_machine_api_pb_machine_proto_rawDescGZIP() []byte {
 	return file_internal_machine_api_pb_machine_proto_rawDescData
 }
 
-var file_internal_machine_api_pb_machine_proto_msgTypes = make([]protoimpl.MessageInfo, 10)
+var file_internal_machine_api_pb_machine_proto_msgTypes = make([]protoimpl.MessageInfo, 11)
 var file_internal_machine_api_pb_machine_proto_goTypes = []any{
-	(*MachineInfo)(nil),            // 0: api.MachineInfo
+	(*CheckPrerequisitesResponse)(nil), // 0: api.CheckPrerequisitesResponse
-	(*NetworkConfig)(nil),          // 1: api.NetworkConfig
+	(*MachineInfo)(nil),                // 1: api.MachineInfo
-	(*InitClusterRequest)(nil),     // 2: api.InitClusterRequest
+	(*NetworkConfig)(nil),              // 2: api.NetworkConfig
-	(*InitClusterResponse)(nil),    // 3: api.InitClusterResponse
+	(*InitClusterRequest)(nil),         // 3: api.InitClusterRequest
-	(*JoinClusterRequest)(nil),     // 4: api.JoinClusterRequest
+	(*InitClusterResponse)(nil),        // 4: api.InitClusterResponse
-	(*TokenResponse)(nil),          // 5: api.TokenResponse
+	(*JoinClusterRequest)(nil),         // 5: api.JoinClusterRequest
-	(*Service)(nil),                // 6: api.Service
+	(*TokenResponse)(nil),              // 6: api.TokenResponse
-	(*InspectServiceRequest)(nil),  // 7: api.InspectServiceRequest
+	(*Service)(nil),                    // 7: api.Service
-	(*InspectServiceResponse)(nil), // 8: api.InspectServiceResponse
+	(*InspectServiceRequest)(nil),      // 8: api.InspectServiceRequest
-	(*Service_Container)(nil),      // 9: api.Service.Container
+	(*InspectServiceResponse)(nil),     // 9: api.InspectServiceResponse
-	(*IP)(nil),                     // 10: api.IP
+	(*Service_Container)(nil),          // 10: api.Service.Container
-	(*IPPrefix)(nil),               // 11: api.IPPrefix
+	(*IP)(nil),                         // 11: api.IP
-	(*IPPort)(nil),                 // 12: api.IPPort
+	(*IPPrefix)(nil),                   // 12: api.IPPrefix
-	(*emptypb.Empty)(nil),          // 13: google.protobuf.Empty
+	(*IPPort)(nil),                     // 13: api.IPPort
+	(*emptypb.Empty)(nil),              // 14: google.protobuf.Empty
 }
 var file_internal_machine_api_pb_machine_proto_depIdxs = []int32{
-	1,  // 0: api.MachineInfo.network:type_name -> api.NetworkConfig
+	2,  // 0: api.MachineInfo.network:type_name -> api.NetworkConfig
-	10, // 1: api.MachineInfo.public_ip:type_name -> api.IP
+	11, // 1: api.MachineInfo.public_ip:type_name -> api.IP
-	11, // 2: api.NetworkConfig.subnet:type_name -> api.IPPrefix
+	12, // 2: api.NetworkConfig.subnet:type_name -> api.IPPrefix
-	10, // 3: api.NetworkConfig.management_ip:type_name -> api.IP
+	11, // 3: api.NetworkConfig.management_ip:type_name -> api.IP
-	12, // 4: api.NetworkConfig.endpoints:type_name -> api.IPPort
+	13, // 4: api.NetworkConfig.endpoints:type_name -> api.IPPort
-	11, // 5: api.InitClusterRequest.network:type_name -> api.IPPrefix
+	12, // 5: api.InitClusterRequest.network:type_name -> api.IPPrefix
-	10, // 6: api.InitClusterRequest.public_ip:type_name -> api.IP
+	11, // 6: api.InitClusterRequest.public_ip:type_name -> api.IP
-	0,  // 7: api.InitClusterResponse.machine:type_name -> api.MachineInfo
+	1,  // 7: api.InitClusterResponse.machine:type_name -> api.MachineInfo
-	0,  // 8: api.JoinClusterRequest.machine:type_name -> api.MachineInfo
+	1,  // 8: api.JoinClusterRequest.machine:type_name -> api.MachineInfo
-	0,  // 9: api.JoinClusterRequest.other_machines:type_name -> api.MachineInfo
+	1,  // 9: api.JoinClusterRequest.other_machines:type_name -> api.MachineInfo
-	9,  // 10: api.Service.containers:type_name -> api.Service.Container
+	10, // 10: api.Service.containers:type_name -> api.Service.Container
-	6,  // 11: api.InspectServiceResponse.service:type_name -> api.Service
+	7,  // 11: api.InspectServiceResponse.service:type_name -> api.Service
-	2,  // 12: api.Machine.InitCluster:input_type -> api.InitClusterRequest
+	14, // 12: api.Machine.CheckPrerequisites:input_type -> google.protobuf.Empty
-	4,  // 13: api.Machine.JoinCluster:input_type -> api.JoinClusterRequest
+	3,  // 13: api.Machine.InitCluster:input_type -> api.InitClusterRequest
-	13, // 14: api.Machine.Token:input_type -> google.protobuf.Empty
+	5,  // 14: api.Machine.JoinCluster:input_type -> api.JoinClusterRequest
-	13, // 15: api.Machine.Inspect:input_type -> google.protobuf.Empty
+	14, // 15: api.Machine.Token:input_type -> google.protobuf.Empty
-	7,  // 16: api.Machine.InspectService:input_type -> api.InspectServiceRequest
+	14, // 16: api.Machine.Inspect:input_type -> google.protobuf.Empty
-	3,  // 17: api.Machine.InitCluster:output_type -> api.InitClusterResponse
+	8,  // 17: api.Machine.InspectService:input_type -> api.InspectServiceRequest
-	13, // 18: api.Machine.JoinCluster:output_type -> google.protobuf.Empty
+	0,  // 18: api.Machine.CheckPrerequisites:output_type -> api.CheckPrerequisitesResponse
-	5,  // 19: api.Machine.Token:output_type -> api.TokenResponse
+	4,  // 19: api.Machine.InitCluster:output_type -> api.InitClusterResponse
-	0,  // 20: api.Machine.Inspect:output_type -> api.MachineInfo
+	14, // 20: api.Machine.JoinCluster:output_type -> google.protobuf.Empty
-	8,  // 21: api.Machine.InspectService:output_type -> api.InspectServiceResponse
+	6,  // 21: api.Machine.Token:output_type -> api.TokenResponse
-	17, // [17:22] is the sub-list for method output_type
+	1,  // 22: api.Machine.Inspect:output_type -> api.MachineInfo
-	12, // [12:17] is the sub-list for method input_type
+	9,  // 23: api.Machine.InspectService:output_type -> api.InspectServiceResponse
+	18, // [18:24] is the sub-list for method output_type
+	12, // [12:18] is the sub-list for method input_type
 	12, // [12:12] is the sub-list for extension type_name
 	12, // [12:12] is the sub-list for extension extendee
 	0,  // [0:12] is the sub-list for field type_name
@@ -799,7 +869,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 	file_internal_machine_api_pb_common_proto_init()
 	if !protoimpl.UnsafeEnabled {
 		file_internal_machine_api_pb_machine_proto_msgTypes[0].Exporter = func(v any, i int) any {
-			switch v := v.(*MachineInfo); i {
+			switch v := v.(*CheckPrerequisitesResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -811,7 +881,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[1].Exporter = func(v any, i int) any {
-			switch v := v.(*NetworkConfig); i {
+			switch v := v.(*MachineInfo); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -823,7 +893,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[2].Exporter = func(v any, i int) any {
-			switch v := v.(*InitClusterRequest); i {
+			switch v := v.(*NetworkConfig); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -835,7 +905,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[3].Exporter = func(v any, i int) any {
-			switch v := v.(*InitClusterResponse); i {
+			switch v := v.(*InitClusterRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -847,7 +917,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[4].Exporter = func(v any, i int) any {
-			switch v := v.(*JoinClusterRequest); i {
+			switch v := v.(*InitClusterResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -859,7 +929,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[5].Exporter = func(v any, i int) any {
-			switch v := v.(*TokenResponse); i {
+			switch v := v.(*JoinClusterRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -871,7 +941,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[6].Exporter = func(v any, i int) any {
-			switch v := v.(*Service); i {
+			switch v := v.(*TokenResponse); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -883,7 +953,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[7].Exporter = func(v any, i int) any {
-			switch v := v.(*InspectServiceRequest); i {
+			switch v := v.(*Service); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -895,7 +965,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[8].Exporter = func(v any, i int) any {
-			switch v := v.(*InspectServiceResponse); i {
+			switch v := v.(*InspectServiceRequest); i {
 			case 0:
 				return &v.state
 			case 1:
@@ -907,6 +977,18 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 		file_internal_machine_api_pb_machine_proto_msgTypes[9].Exporter = func(v any, i int) any {
+			switch v := v.(*InspectServiceResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_internal_machine_api_pb_machine_proto_msgTypes[10].Exporter = func(v any, i int) any {
 			switch v := v.(*Service_Container); i {
 			case 0:
 				return &v.state
@@ -919,7 +1001,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			}
 		}
 	}
-	file_internal_machine_api_pb_machine_proto_msgTypes[2].OneofWrappers = []any{
+	file_internal_machine_api_pb_machine_proto_msgTypes[3].OneofWrappers = []any{
 		(*InitClusterRequest_PublicIp)(nil),
 		(*InitClusterRequest_PublicIpAuto)(nil),
 	}
@@ -929,7 +1011,7 @@ func file_internal_machine_api_pb_machine_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_internal_machine_api_pb_machine_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   10,
+			NumMessages:   11,
 			NumExtensions: 0,
 			NumServices:   1,
 		},

internal/machine/api/pb/machine.proto

@@ -8,6 +8,8 @@ import "google/protobuf/empty.proto";
 import "internal/machine/api/pb/common.proto";
 
 service Machine {
+  // CheckPrerequisites verifies if the machine meets all necessary system requirements to participate in the cluster.
+  rpc CheckPrerequisites(google.protobuf.Empty) returns (CheckPrerequisitesResponse);
   rpc InitCluster(InitClusterRequest) returns (InitClusterResponse);
   rpc JoinCluster(JoinClusterRequest) returns (google.protobuf.Empty);
   rpc Token(google.protobuf.Empty) returns (TokenResponse);
@@ -29,6 +31,13 @@ message NetworkConfig {
   bytes public_key = 4;
 }
 
+message CheckPrerequisitesResponse {
+  // Overall status of the checks.
+  bool satisfied = 1;
+  // Error message if not satisfied (empty if all checks pass).
+  string error = 2;
+}
+
 message InitClusterRequest {
   string machineName = 1;
   IPPrefix network = 2;

internal/machine/api/pb/machine_grpc.pb.go

@@ -20,17 +20,19 @@ import (
 const _ = grpc.SupportPackageIsVersion9
 
 const (
-	Machine_InitCluster_FullMethodName    = "/api.Machine/InitCluster"
+	Machine_CheckPrerequisites_FullMethodName = "/api.Machine/CheckPrerequisites"
-	Machine_JoinCluster_FullMethodName    = "/api.Machine/JoinCluster"
+	Machine_InitCluster_FullMethodName        = "/api.Machine/InitCluster"
-	Machine_Token_FullMethodName          = "/api.Machine/Token"
+	Machine_JoinCluster_FullMethodName        = "/api.Machine/JoinCluster"
-	Machine_Inspect_FullMethodName        = "/api.Machine/Inspect"
+	Machine_Token_FullMethodName              = "/api.Machine/Token"
-	Machine_InspectService_FullMethodName = "/api.Machine/InspectService"
+	Machine_Inspect_FullMethodName            = "/api.Machine/Inspect"
+	Machine_InspectService_FullMethodName     = "/api.Machine/InspectService"
 )
 
 // MachineClient is the client API for Machine service.
 //
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
 type MachineClient interface {
+	CheckPrerequisites(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*CheckPrerequisitesResponse, error)
 	InitCluster(ctx context.Context, in *InitClusterRequest, opts ...grpc.CallOption) (*InitClusterResponse, error)
 	JoinCluster(ctx context.Context, in *JoinClusterRequest, opts ...grpc.CallOption) (*emptypb.Empty, error)
 	Token(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*TokenResponse, error)
@@ -46,6 +48,16 @@ func NewMachineClient(cc grpc.ClientConnInterface) MachineClient {
 	return &machineClient{cc}
 }
 
+func (c *machineClient) CheckPrerequisites(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*CheckPrerequisitesResponse, error) {
+	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
+	out := new(CheckPrerequisitesResponse)
+	err := c.cc.Invoke(ctx, Machine_CheckPrerequisites_FullMethodName, in, out, cOpts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *machineClient) InitCluster(ctx context.Context, in *InitClusterRequest, opts ...grpc.CallOption) (*InitClusterResponse, error) {
 	cOpts := append([]grpc.CallOption{grpc.StaticMethod()}, opts...)
 	out := new(InitClusterResponse)
@@ -100,6 +112,7 @@ func (c *machineClient) InspectService(ctx context.Context, in *InspectServiceRe
 // All implementations must embed UnimplementedMachineServer
 // for forward compatibility.
 type MachineServer interface {
+	CheckPrerequisites(context.Context, *emptypb.Empty) (*CheckPrerequisitesResponse, error)
 	InitCluster(context.Context, *InitClusterRequest) (*InitClusterResponse, error)
 	JoinCluster(context.Context, *JoinClusterRequest) (*emptypb.Empty, error)
 	Token(context.Context, *emptypb.Empty) (*TokenResponse, error)
@@ -115,6 +128,9 @@ type MachineServer interface {
 // pointer dereference when methods are called.
 type UnimplementedMachineServer struct{}
 
+func (UnimplementedMachineServer) CheckPrerequisites(context.Context, *emptypb.Empty) (*CheckPrerequisitesResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method CheckPrerequisites not implemented")
+}
 func (UnimplementedMachineServer) InitCluster(context.Context, *InitClusterRequest) (*InitClusterResponse, error) {
 	return nil, status.Errorf(codes.Unimplemented, "method InitCluster not implemented")
 }
@@ -151,6 +167,24 @@ func RegisterMachineServer(s grpc.ServiceRegistrar, srv MachineServer) {
 	s.RegisterService(&Machine_ServiceDesc, srv)
 }
 
+func _Machine_CheckPrerequisites_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(emptypb.Empty)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(MachineServer).CheckPrerequisites(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: Machine_CheckPrerequisites_FullMethodName,
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(MachineServer).CheckPrerequisites(ctx, req.(*emptypb.Empty))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _Machine_InitCluster_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
 	in := new(InitClusterRequest)
 	if err := dec(in); err != nil {
@@ -248,6 +282,10 @@ var Machine_ServiceDesc = grpc.ServiceDesc{
 	ServiceName: "api.Machine",
 	HandlerType: (*MachineServer)(nil),
 	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "CheckPrerequisites",
+			Handler:    _Machine_CheckPrerequisites_Handler,
+		},
 		{
 			MethodName: "InitCluster",
 			Handler:    _Machine_InitCluster_Handler,

internal/machine/caddyconfig/config.go

@@ -1,4 +1,4 @@
-package caddyfile
+package caddyconfig
 
 import (
 	"encoding/json"
@@ -10,12 +10,12 @@ import (
 	"net/http"
 	"slices"
 	"strconv"
+	"time"
 
 	"github.com/caddyserver/caddy/v2"
 	"github.com/caddyserver/caddy/v2/caddyconfig"
 	"github.com/caddyserver/caddy/v2/modules/caddyhttp"
 	"github.com/caddyserver/caddy/v2/modules/caddyhttp/reverseproxy"
-	"github.com/psviderski/uncloud/internal/machine/docker"
 	"github.com/psviderski/uncloud/pkg/api"
 )
 
@@ -24,34 +24,38 @@ func GenerateConfig(containers []api.ServiceContainer, verifyResponse string) (*
 	httpHostUpstreams := make(map[string][]string)
 	httpsHostUpstreams := make(map[string][]string)
 	for _, ctr := range containers {
-		logger := slog.With("container", ctr.ID)
+		if !ctr.Healthy() {
-		network, ok := ctr.NetworkSettings.Networks[docker.NetworkName]
-		if !ok {
-			// Container is not connected to the uncloud Docker network (could be host network).
-			continue
-		}
-		if network.IPAddress == "" {
-			logger.Error("Container has no IPv4 address.")
 			continue
 		}
 
+		ip := ctr.UncloudNetworkIP()
+		if !ip.IsValid() {
+			// Container is not connected to the uncloud Docker network (could be host network).
+			continue
+		}
+		log := slog.With("container", ctr.ID)
+
 		ports, err := ctr.ServicePorts()
 		if err != nil {
-			logger.Error("Failed to parse service ports for container.", "err", err)
+			log.Error("Failed to parse service ports for container.", "err", err)
 			continue
 		}
 
 		for _, port := range ports {
+			if port.Mode != api.PortModeIngress {
+				continue
+			}
+
 			switch port.Protocol {
 			case api.ProtocolHTTP:
-				upstream := net.JoinHostPort(network.IPAddress, strconv.Itoa(int(port.ContainerPort)))
+				upstream := net.JoinHostPort(ip.String(), strconv.Itoa(int(port.ContainerPort)))
 				httpHostUpstreams[port.Hostname] = append(httpHostUpstreams[port.Hostname], upstream)
 			case api.ProtocolHTTPS:
-				upstream := net.JoinHostPort(network.IPAddress, strconv.Itoa(int(port.ContainerPort)))
+				upstream := net.JoinHostPort(ip.String(), strconv.Itoa(int(port.ContainerPort)))
 				httpsHostUpstreams[port.Hostname] = append(httpsHostUpstreams[port.Hostname], upstream)
 			default:
 				// TODO: implement L4 ingress routing for TCP and UDP.
-				logger.Error("Unsupported protocol for ingress port.", "port", port)
+				log.Error("Unsupported protocol for ingress port.", "port", port)
 				continue
 			}
 		}
@@ -61,6 +65,8 @@ func GenerateConfig(containers []api.ServiceContainer, verifyResponse string) (*
 	servers := make(map[string]*caddyhttp.Server)
 	servers["http"] = &caddyhttp.Server{
 		Listen: []string{fmt.Sprintf(":%d", caddyhttp.DefaultHTTPPort)},
+		// All http requests to this server are logged to the default logger.
+		Logs: &caddyhttp.ServerLogConfig{},
 		Routes: append(
 			hostUpstreamsToRoutes(httpHostUpstreams, &warnings),
 			// Add a route to respond with a static verification response at the /.uncloud-verify path.
@@ -69,6 +75,8 @@ func GenerateConfig(containers []api.ServiceContainer, verifyResponse string) (*
 	}
 	servers["https"] = &caddyhttp.Server{
 		Listen: []string{fmt.Sprintf(":%d", caddyhttp.DefaultHTTPSPort)},
+		// All https requests to this server are logged to the default logger.
+		Logs:   &caddyhttp.ServerLogConfig{},
 		Routes: hostUpstreamsToRoutes(httpsHostUpstreams, &warnings),
 	}
 
@@ -109,6 +117,16 @@ func hostUpstreamsToRoutes(hostUpstreams map[string][]string, warnings *[]caddyc
 			}
 		}
 		handler := &reverseproxy.Handler{
+			HealthChecks: &reverseproxy.HealthChecks{
+				// Enable passive health checks to automatically detect unhealthy upstreams.
+				Passive: &reverseproxy.PassiveHealthChecks{
+					FailDuration: caddy.Duration(30 * time.Second),
+				},
+			},
+			LoadBalancing: &reverseproxy.LoadBalancing{
+				// Retry failed requests to skip over temporarily unavailable upstreams.
+				Retries: 3,
+			},
 			Upstreams: upstreamPool,
 		}
 

internal/machine/caddyconfig/config_test.go

@@ -1,4 +1,4 @@
-package caddyfile
+package caddyconfig
 
 import (
 	"strings"
@@ -14,6 +14,27 @@ import (
 )
 
 func TestGenerateConfig(t *testing.T) {
+	configWithoutServices := `{
+		"servers": {
+			"http": {
+				"listen": [":80"],
+				"routes": [{
+					"match": [{"path": ["/.uncloud-verify"]}],
+					"handle": [{
+						"body": "verification-response-body",
+						"handler": "static_response",
+						"status_code": 200
+					}]
+				}],
+				"logs": {}
+			},
+			"https": {
+				"listen": [":443"],
+				"logs": {}
+			}
+		}
+	}`
+
 	tests := []struct {
 		name       string
 		containers []api.ServiceContainer
@@ -23,25 +44,8 @@ func TestGenerateConfig(t *testing.T) {
 		{
 			name:       "empty containers",
 			containers: []api.ServiceContainer{},
-			want: `{
+			want:       configWithoutServices,
-                "servers": {
+			wantErr:    false,
-                    "http": {
-                        "listen": [":80"],
-                        "routes": [{
-                            "match": [{"path": ["/.uncloud-verify"]}],
-                            "handle": [{
-								"body": "verification-response-body",
-								"handler": "static_response",
-								"status_code": 200
-							}]
-                        }]
-                    },
-                    "https": {
-                        "listen": [":443"]
-                    }
-				}
-			}`,
-			wantErr: false,
 		},
 
 		{
@@ -58,6 +62,14 @@ func TestGenerateConfig(t *testing.T) {
                                 "match": [{"host": ["app.example.com"]}],
                                 "handle": [{
                                     "handler": "reverse_proxy",
+									"health_checks": {
+                                        "passive": {
+                                            "fail_duration": 30000000000
+                                        }
+                                    },
+                                    "load_balancing": {
+                                        "retries": 3
+                                    },
                                     "upstreams": [{"dial": "10.210.0.2:8080"}]
                                 }]
                             },
@@ -69,10 +81,12 @@ func TestGenerateConfig(t *testing.T) {
                                     "status_code": 200
                                 }]
                             }
-                        ]
+                        ],
+						"logs": {}
                     },
                     "https": {
-                        "listen": [":443"]
+                        "listen": [":443"],
+						"logs": {}
                     }
                 }
             }`,
@@ -93,6 +107,14 @@ func TestGenerateConfig(t *testing.T) {
                                 "match": [{"host": ["app.example.com"]}],
                                 "handle": [{
                                     "handler": "reverse_proxy",
+									"health_checks": {
+                                        "passive": {
+                                            "fail_duration": 30000000000
+                                        }
+                                    },
+                                    "load_balancing": {
+                                        "retries": 3
+                                    },
                                     "upstreams": [
                                         {"dial": "10.210.0.2:8080"},
                                         {"dial": "10.210.0.3:8080"}
@@ -107,10 +129,12 @@ func TestGenerateConfig(t *testing.T) {
                                     "status_code": 200
                                 }]
                             }
-                        ]
+                        ],
+						"logs": {}
                     },
                     "https": {
-                        "listen": [":443"]
+                        "listen": [":443"],
+						"logs": {}
                     }
                 }
             }`,
@@ -134,7 +158,8 @@ func TestGenerateConfig(t *testing.T) {
                                     "status_code": 200
                                 }]
                             }
-                        ]
+                        ],
+						"logs": {}
                     },
                     "https": {
                         "listen": [":443"],
@@ -143,10 +168,19 @@ func TestGenerateConfig(t *testing.T) {
                                 "match": [{"host": ["secure.example.com"]}],
                                 "handle": [{
                                     "handler": "reverse_proxy",
+									"health_checks": {
+                                        "passive": {
+                                            "fail_duration": 30000000000
+                                        }
+                                    },
+                                    "load_balancing": {
+                                        "retries": 3
+                                    },
                                     "upstreams": [{"dial": "10.210.0.2:8000"}]
                                 }]
                             }
-                        ]
+                        ],
+						"logs": {}
                     }
                 }
             }`,
@@ -178,6 +212,14 @@ func TestGenerateConfig(t *testing.T) {
                                 "match": [{"host": ["app.example.com"]}],
                                 "handle": [{
                                     "handler": "reverse_proxy",
+									"health_checks": {
+                                        "passive": {
+                                            "fail_duration": 30000000000
+                                        }
+                                    },
+                                    "load_balancing": {
+                                        "retries": 3
+                                    },
                                     "upstreams": [
 										{"dial": "10.210.0.2:8080"},
 										{"dial": "10.210.0.3:8080"},
@@ -189,6 +231,14 @@ func TestGenerateConfig(t *testing.T) {
                                 "match": [{"host": ["web.example.com"]}],
                                 "handle": [{
                                     "handler": "reverse_proxy",
+									"health_checks": {
+                                        "passive": {
+                                            "fail_duration": 30000000000
+                                        }
+                                    },
+                                    "load_balancing": {
+                                        "retries": 3
+                                    },
                                     "upstreams": [
 										{"dial": "10.210.0.2:8000"},
 										{"dial": "10.210.0.4:8000"},
@@ -204,7 +254,8 @@ func TestGenerateConfig(t *testing.T) {
                                     "status_code": 200
                                 }]
                             }
-                        ]
+                        ],
+						"logs": {}
                     },
                     "https": {
                         "listen": [":443"],
@@ -213,6 +264,14 @@ func TestGenerateConfig(t *testing.T) {
                                 "match": [{"host": ["secure.example.com"]}],
                                 "handle": [{
                                     "handler": "reverse_proxy",
+									"health_checks": {
+                                        "passive": {
+                                            "fail_duration": 30000000000
+                                        }
+                                    },
+                                    "load_balancing": {
+                                        "retries": 3
+                                    },
                                     "upstreams": [
 										{"dial": "10.210.0.3:8888"},
 										{"dial": "10.210.0.4:8888"},
@@ -220,7 +279,8 @@ func TestGenerateConfig(t *testing.T) {
 									]
                                 }]
                             }
-                        ]
+                        ],
+						"logs": {}
                     }
                 }
             }`,
@@ -231,24 +291,7 @@ func TestGenerateConfig(t *testing.T) {
 			containers: []api.ServiceContainer{
 				newContainerWithoutNetwork("ignored.example.com:8080/http"),
 			},
-			want: `{
+			want:    configWithoutServices,
-                "servers": {
-                    "http": {
-                        "listen": [":80"],
-                        "routes": [{
-                            "match": [{"path": ["/.uncloud-verify"]}],
-                            "handle": [{
-                                "body": "verification-response-body",
-                                "handler": "static_response",
-                                "status_code": 200
-                            }]
-                        }]
-                    },
-                    "https": {
-                        "listen": [":443"]
-                    }
-                }
-            }`,
 			wantErr: false,
 		},
 		{
@@ -256,48 +299,76 @@ func TestGenerateConfig(t *testing.T) {
 			containers: []api.ServiceContainer{
 				newContainer("10.210.0.2", "invalid-port"),
 			},
-			want: `{
+			want:    configWithoutServices,
-                "servers": {
-                    "http": {
-                        "listen": [":80"],
-                        "routes": [{
-                            "match": [{"path": ["/.uncloud-verify"]}],
-                            "handle": [{
-                                "body": "verification-response-body",
-                                "handler": "static_response",
-                                "status_code": 200
-                            }]
-                        }]
-                    },
-                    "https": {
-                        "listen": [":443"]
-                    }
-                }
-            }`,
 			wantErr: false,
 		},
 		{
-			name: "containers with unsupported protocols ignored",
+			name: "containers with unsupported protocols and host mode ignored",
 			containers: []api.ServiceContainer{
 				newContainer("10.210.0.2", "5000/tcp"),
 				newContainer("10.210.0.3", "5000/udp"),
 				newContainer("10.210.0.4", "80:8080/tcp@host"),
 			},
+			want:    configWithoutServices,
+			wantErr: false,
+		},
+		{
+			name: "restarting container ignored",
+			containers: []api.ServiceContainer{
+				newRestartingContainer("10.210.0.2", "app.example.com:8080/http"),
+			},
+			want:    configWithoutServices,
+			wantErr: false,
+		},
+		{
+			name: "stopped container ignored",
+			containers: []api.ServiceContainer{
+				newStoppedContainer("10.210.0.2", "app.example.com:8080/http"),
+			},
+			want:    configWithoutServices,
+			wantErr: false,
+		},
+		{
+			name: "mix of running, restarting, and stopped containers",
+			containers: []api.ServiceContainer{
+				newContainer("10.210.0.2", "app.example.com:8080/http"),
+				newRestartingContainer("10.210.0.3", "app.example.com:8080/http"),
+				newStoppedContainer("10.210.0.4", "app.example.com:8080/http"),
+			},
 			want: `{
                 "servers": {
                     "http": {
                         "listen": [":80"],
-                        "routes": [{
+                        "routes": [
-                            "match": [{"path": ["/.uncloud-verify"]}],
+                            {
-                            "handle": [{
+                                "match": [{"host": ["app.example.com"]}],
-                                "body": "verification-response-body",
+                                "handle": [{
-                                "handler": "static_response",
+                                    "handler": "reverse_proxy",
-                                "status_code": 200
+									"health_checks": {
-                            }]
+                                        "passive": {
-                        }]
+                                            "fail_duration": 30000000000
+                                        }
+                                    },
+                                    "load_balancing": {
+                                        "retries": 3
+                                    },
+                                    "upstreams": [{"dial": "10.210.0.2:8080"}]
+                                }]
+                            },
+                            {
+                                "match": [{"path": ["/.uncloud-verify"]}],
+                                "handle": [{
+                                    "body": "verification-response-body",
+                                    "handler": "static_response",
+                                    "status_code": 200
+                                }]
+                            }
+                        ],
+						"logs": {}
                     },
                     "https": {
-                        "listen": [":443"]
+                        "listen": [":443"],
+						"logs": {}
                     }
                 }
             }`,
@@ -326,7 +397,11 @@ func TestGenerateConfig(t *testing.T) {
 func newContainer(ip string, ports ...string) api.ServiceContainer {
 	portsLabel := strings.Join(ports, ",")
 	return api.ServiceContainer{Container: api.Container{ContainerJSON: types.ContainerJSON{
-		ContainerJSONBase: &types.ContainerJSONBase{},
+		ContainerJSONBase: &types.ContainerJSONBase{
+			State: &types.ContainerState{
+				Running: true,
+			},
+		},
 		NetworkSettings: &types.NetworkSettings{
 			Networks: map[string]*network.EndpointSettings{
 				docker.NetworkName: {
@@ -345,7 +420,11 @@ func newContainer(ip string, ports ...string) api.ServiceContainer {
 func newContainerWithoutNetwork(ports ...string) api.ServiceContainer {
 	portsLabel := strings.Join(ports, ",")
 	return api.ServiceContainer{Container: api.Container{ContainerJSON: types.ContainerJSON{
-		ContainerJSONBase: &types.ContainerJSONBase{},
+		ContainerJSONBase: &types.ContainerJSONBase{
+			State: &types.ContainerState{
+				Running: true,
+			},
+		},
 		NetworkSettings: &types.NetworkSettings{
 			Networks: map[string]*network.EndpointSettings{
 				"other-network": {
@@ -360,3 +439,15 @@ func newContainerWithoutNetwork(ports ...string) api.ServiceContainer {
 		},
 	}}}
 }
+
+func newRestartingContainer(ip string, ports ...string) api.ServiceContainer {
+	ctr := newContainer(ip, ports...)
+	ctr.Container.State.Restarting = true
+	return ctr
+}
+
+func newStoppedContainer(ip string, ports ...string) api.ServiceContainer {
+	ctr := newContainer(ip, ports...)
+	ctr.Container.State.Running = false
+	return ctr
+}

internal/machine/caddyconfig/controller.go

@@ -1,4 +1,4 @@
-package caddyfile
+package caddyconfig
 
 import (
 	"context"
@@ -19,7 +19,7 @@ const (
 )
 
 // Controller monitors container changes in the cluster store and generates a configuration file for Caddy reverse
-// proxy. The generated Caddyfile allows Caddy to route external traffic to service containers across the internal
+// proxy. The generated configuration allows Caddy to route external traffic to service containers across the internal
 // network.
 type Controller struct {
 	store          *store.Store

internal/machine/dns/resolver.go

@@ -0,0 +1,126 @@
+package dns
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"net/netip"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/psviderski/uncloud/internal/machine/store"
+	"github.com/psviderski/uncloud/pkg/api"
+)
+
+// ClusterResolver implements Resolver by tracking containers in the cluster and resolving service names
+// to their IP addresses.
+type ClusterResolver struct {
+	store *store.Store
+	// serviceIPs maps service names to container IPs.
+	serviceIPs map[string][]netip.Addr
+	// mu protects the serviceIPs map.
+	mu sync.RWMutex
+	// lastUpdate tracks when records were last updated.
+	lastUpdate time.Time
+	log        *slog.Logger
+}
+
+// NewClusterResolver creates a new cluster resolver using the cluster store.
+func NewClusterResolver(store *store.Store) *ClusterResolver {
+	return &ClusterResolver{
+		store:      store,
+		serviceIPs: make(map[string][]netip.Addr),
+		log:        slog.With("component", "dns-resolver"),
+	}
+}
+
+// Run starts watching for container changes and updates DNS records accordingly.
+func (r *ClusterResolver) Run(ctx context.Context) error {
+	containers, changes, err := r.store.SubscribeContainers(ctx)
+	if err != nil {
+		return fmt.Errorf("subscribe to container changes: %w", err)
+	}
+	r.log.Info("Subscribed to container changes in the cluster to keep DNS records updated.")
+
+	// TODO: implement machine membership check using Corrossion Admin client to filter available containers.
+	r.updateServiceIPs(containers)
+
+	for {
+		select {
+		case _, ok := <-changes:
+			if !ok {
+				return fmt.Errorf("containers subscription failed")
+			}
+			r.log.Debug("Cluster containers changed, updating DNS records.")
+
+			containers, err = r.store.ListContainers(ctx, store.ListOptions{})
+			if err != nil {
+				r.log.Error("Failed to list containers.", "err", err)
+				continue
+			}
+
+			// TODO: implement machine membership check using Corrossion Admin client to filter available containers.
+			r.updateServiceIPs(containers)
+		case <-ctx.Done():
+			return nil
+		}
+	}
+}
+
+// updateServiceIPs processes container records and updates the serviceIPs map.
+func (r *ClusterResolver) updateServiceIPs(containers []store.ContainerRecord) {
+	newServiceIPs := make(map[string][]netip.Addr, len(r.serviceIPs))
+
+	containersCount := 0
+	for _, record := range containers {
+		if !record.Container.Healthy() {
+			continue
+		}
+
+		ip := record.Container.UncloudNetworkIP()
+		if !ip.IsValid() {
+			// Container is not connected to the uncloud Docker network (could be host network).
+			continue
+		}
+
+		ctr := api.ServiceContainer{Container: record.Container}
+		if ctr.ServiceID() == "" || ctr.ServiceName() == "" {
+			// Container is not part of a service, skip it.
+			continue
+		}
+
+		// TODO: remove normalisation after implementing service name validation:
+		//.https://github.com/psviderski/uncloud/issues/53
+		serviceName := strings.ToLower(ctr.ServiceName())
+
+		newServiceIPs[serviceName] = append(newServiceIPs[serviceName], ip)
+		// Also add the service ID as a valid lookup.
+		newServiceIPs[ctr.ServiceID()] = append(newServiceIPs[ctr.ServiceID()], ip)
+		containersCount++
+	}
+
+	// Update the serviceIPs map atomically.
+	r.mu.Lock()
+	r.serviceIPs = newServiceIPs
+	r.mu.Unlock()
+
+	r.log.Debug("DNS records updated.", "services", len(newServiceIPs)/2, "containers", containersCount)
+}
+
+// Resolve returns IP addresses of the service containers.
+func (r *ClusterResolver) Resolve(serviceName string) []netip.Addr {
+	r.mu.RLock()
+	defer r.mu.RUnlock()
+
+	ips, ok := r.serviceIPs[serviceName]
+	if !ok || len(ips) == 0 {
+		return nil
+	}
+
+	// Return a copy of the IPs slice to prevent modification of the original.
+	ipsCopy := make([]netip.Addr, len(ips))
+	copy(ipsCopy, ips)
+
+	return ipsCopy
+}

internal/machine/dns/server.go

@@ -0,0 +1,347 @@
+package dns
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"log/slog"
+	"math/rand/v2"
+	"net"
+	"net/netip"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/miekg/dns"
+)
+
+const (
+	// InternalDomain is the cluster internal domain for service discovery. All DNS queries ending with this suffix
+	// will be resolved using the internal DNS server.
+	InternalDomain = "internal."
+	// Port is the standard DNS port.
+	Port = 53
+	// maxConcurrentForwards is the maximum number of concurrent forwarded queries to upstream DNS servers.
+	// 1024 is the default used by the Docker internal DNS server.
+	maxConcurrentForwards = 1024
+	// forwardingTimeout is the timeout for forwarding a DNS query to an upstream server.
+	forwardingTimeout = 3 * time.Second
+)
+
+// Resolver is an interface for resolving service names to IP addresses.
+type Resolver interface {
+	// Resolve returns a list of IP addresses of the service containers.
+	// An empty list is returned if no service is found.
+	Resolve(serviceName string) []netip.Addr
+}
+
+// Server is an embedded internal DNS server for service discovery and forwarding external queries
+// to upstream DNS servers.
+type Server struct {
+	listenAddr      netip.Addr
+	resolver        Resolver
+	upstreamServers []netip.AddrPort
+
+	udpServer        *dns.Server
+	tcpServer        *dns.Server
+	inProgressReqs   sync.WaitGroup
+	forwardSemaphore chan struct{}
+	log              *slog.Logger
+}
+
+// NewServer creates a new DNS server with the given configuration.
+// If upstreams is nil, nameservers from /etc/resolv.conf will be used. An empty upstreams list means to only resolve
+// internal DNS queries and not forward any external queries.
+func NewServer(listenAddr netip.Addr, resolver Resolver, upstreams []netip.AddrPort) (*Server, error) {
+	if !listenAddr.IsValid() {
+		return nil, fmt.Errorf("invalid listen address: %s", listenAddr)
+	}
+	if resolver == nil {
+		return nil, fmt.Errorf("resolver must be provided")
+	}
+
+	// Load upstreams from /etc/resolv.conf and set fallback servers only if upstreams is not provided.
+	if upstreams == nil {
+		if nameservers, err := parseNameserversFromResolvConf(); err != nil {
+			slog.Warn("Failed to parse nameservers from /etc/resolv.conf.", "err", err)
+		} else {
+			for _, ns := range nameservers {
+				if ns.Compare(listenAddr) == 0 {
+					// Skip this internal DNS server address if it has been configured in /etc/resolv.conf
+					// to not create a forwarding loop.
+					continue
+				}
+				upstreams = append(upstreams, netip.AddrPortFrom(ns, Port))
+			}
+		}
+
+		// Fallback to common public DNS servers if no nameservers were found in /etc/resolv.conf.
+		if upstreams == nil {
+			upstreams = []netip.AddrPort{
+				netip.AddrPortFrom(netip.MustParseAddr("1.1.1.1"), Port), // Cloudflare DNS
+				netip.AddrPortFrom(netip.MustParseAddr("8.8.8.8"), Port), // Google DNS
+			}
+		}
+	}
+
+	return &Server{
+		listenAddr:       listenAddr,
+		resolver:         resolver,
+		upstreamServers:  upstreams,
+		forwardSemaphore: make(chan struct{}, maxConcurrentForwards),
+		log:              slog.With("component", "dns-server"),
+	}, nil
+}
+
+// ListenAddr returns the address the DNS server is listening on.
+func (s *Server) ListenAddr() netip.Addr {
+	return s.listenAddr
+}
+
+// Run starts the DNS server listening on both UDP and TCP ports. The server on TCP is not critical so it won't return
+// an error if it fails to start. The server will run until the context is canceled or an error occurs.
+func (s *Server) Run(ctx context.Context) error {
+	addr := net.JoinHostPort(s.listenAddr.String(), strconv.Itoa(Port))
+	s.udpServer = &dns.Server{
+		Addr:    addr,
+		Net:     "udp",
+		Handler: dns.HandlerFunc(s.handleRequest),
+	}
+	s.tcpServer = &dns.Server{
+		Addr:    addr,
+		Net:     "tcp",
+		Handler: dns.HandlerFunc(s.handleRequest),
+	}
+
+	errCh := make(chan error, 1) // Buffer size 1 is for UDP server error only.
+
+	go func() {
+		s.log.Info("Starting DNS server on UDP port.", "addr", addr, "upstreams", s.upstreamServers)
+		if err := s.udpServer.ListenAndServe(); err != nil {
+			errCh <- fmt.Errorf("listen and serve on %s/udp: %w", addr, err)
+		}
+	}()
+
+	go func() {
+		s.log.Info("Starting DNS server on TCP port.", "addr", addr, "upstreams", s.upstreamServers)
+		if err := s.tcpServer.ListenAndServe(); err != nil {
+			// TCP server is not critical, so log the error and continue.
+			slog.Warn("Failed to listen and serve DNS server on TCP port. "+
+				"TCP server is not critical and will be ignored.", "addr", addr, "err", err)
+		}
+	}()
+
+	select {
+	case err := <-errCh:
+		// Stop the servers if the UDP one fails.
+		s.stop()
+		return err
+	case <-ctx.Done():
+		s.log.Info("Stopping DNS server.")
+		return s.stop()
+	}
+}
+
+// stop gracefully shuts down the DNS server.
+func (s *Server) stop() error {
+	var udpErr, tcpErr error
+
+	if s.udpServer != nil {
+		udpErr = s.udpServer.Shutdown()
+	}
+	if s.tcpServer != nil {
+		tcpErr = s.tcpServer.Shutdown()
+	}
+
+	// Wait for all in-progress requests to finish.
+	s.inProgressReqs.Wait()
+
+	if udpErr != nil {
+		return fmt.Errorf("shutdown DNS server (UDP): %w", udpErr)
+	}
+
+	if tcpErr != nil {
+		return fmt.Errorf("shutdown DNS server (TCP): %w", tcpErr)
+	}
+
+	return nil
+}
+
+// handleRequest processes a DNS query and returns an appropriate response.
+func (s *Server) handleRequest(w dns.ResponseWriter, req *dns.Msg) {
+	s.inProgressReqs.Add(1)
+	defer s.inProgressReqs.Done()
+
+	if len(req.Question) == 0 {
+		resp := new(dns.Msg).SetRcode(req, dns.RcodeFormatError)
+		s.reply(w, req, resp)
+		return
+	}
+
+	// While the original DNS RFCs allow multiple questions, in practice it never works. So handle only the first one.
+	q := req.Question[0]
+	log := s.log.With("name", q.Name, "type", dns.TypeToString[q.Qtype])
+	log.Debug("Received DNS query.")
+
+	if !dns.IsSubDomain(InternalDomain, dns.CanonicalName(q.Name)) {
+		log.Debug("Forwarding non-internal DNS query to upstream DNS servers.")
+
+		// Use the same transport for the forwarded request as the original request.
+		resp, err := s.forwardRequest(req, w.LocalAddr().Network())
+		if err != nil {
+			log.Error("Failed to forward DNS query.", "err", err)
+			resp = new(dns.Msg).SetRcode(req, dns.RcodeServerFailure)
+		}
+
+		s.reply(w, req, resp)
+		return
+	}
+
+	// Handle the query for the internal domain.
+	resp := new(dns.Msg).SetReply(req)
+	resp.Authoritative = true
+	resp.RecursionAvailable = true
+
+	switch q.Qtype {
+	case dns.TypeA:
+		records := s.handleAQuery(q.Name)
+		if len(records) > 0 {
+			log.Debug("Found A records for internal DNS query.", "count", len(records))
+			resp.Answer = append(resp.Answer, records...)
+		} else {
+			log.Debug("No records found for internal DNS query.")
+			resp.SetRcode(req, dns.RcodeNameError)
+		}
+		// TODO: Handle other query types (SRV, TXT, etc.) as needed.
+	}
+
+	// Truncate the response if it exceeds the maximum size for the transport protocol.
+	maxSize := dns.MinMsgSize
+	if w.LocalAddr().Network() == "tcp" {
+		maxSize = dns.MaxMsgSize
+	} else {
+		// Retrieve the UDP buffer size from the EDNS0 record if present.
+		if opt := req.IsEdns0(); opt != nil {
+			if udpSize := int(opt.UDPSize()); udpSize > maxSize {
+				maxSize = udpSize
+			}
+		}
+	}
+	resp.Truncate(maxSize)
+
+	s.reply(w, req, resp)
+}
+
+func (s *Server) reply(w dns.ResponseWriter, req *dns.Msg, resp *dns.Msg) error {
+	if err := w.WriteMsg(resp); err != nil {
+		s.log.Error("Failed to write DNS response.", "err", err, "msg", resp)
+		// It may fail due to a malformed response message, e.g. exceeding the maximum size. In that case,
+		// attempt to send a server failure response instead so the client doesn't have to wait for a timeout.
+		if resp.Rcode != dns.RcodeServerFailure {
+			resp = new(dns.Msg).SetRcode(req, dns.RcodeServerFailure)
+			if err2 := w.WriteMsg(resp); err2 != nil {
+				s.log.Error("Failed to write DNS error response.", "err", err2, "msg", resp)
+			}
+		}
+		return err
+	}
+	return nil
+}
+
+// forwardRequest forwards a DNS query to system DNS servers
+func (s *Server) forwardRequest(req *dns.Msg, proto string) (*dns.Msg, error) {
+	if len(s.upstreamServers) == 0 {
+		return nil, errors.New("no upstream DNS servers configured")
+	}
+
+	// Apply concurrency control for forwarded queries.
+	select {
+	case s.forwardSemaphore <- struct{}{}:
+		defer func() {
+			<-s.forwardSemaphore
+		}()
+	default:
+		return nil, fmt.Errorf("too many concurrent forwarded queries (max: %d)", maxConcurrentForwards)
+	}
+
+	// Create DNS client with timeout and same transport as original request
+	client := &dns.Client{
+		Net:     proto,
+		Timeout: forwardingTimeout,
+	}
+
+	var lastErr error
+	for _, server := range s.upstreamServers {
+		resp, _, err := client.Exchange(req, server.String())
+		if err == nil {
+			return resp, nil
+		}
+		lastErr = err
+		s.log.Debug("Failed to forward DNS query to upstream server.", "server", server, "err", err)
+	}
+
+	return nil, lastErr
+}
+
+// handleAQuery processes an A query for the internal domain and returns A records for the requested name.
+// The internal domain suffix is already stripped from the name. An empty list is returned if no records are found.
+func (s *Server) handleAQuery(name string) []dns.RR {
+	serviceName := trimInternalDomain(name)
+	ips := s.resolver.Resolve(serviceName)
+	if len(ips) == 0 {
+		s.log.Debug("Failed to resolve service name.", "service", serviceName)
+		return nil
+	}
+	s.log.Debug("Resolved service name.", "service", serviceName, "ips", ips)
+
+	if len(ips) > 1 {
+		// TODO: sort by proximity to the requesting container/machine. For now, just shuffle the IPs.
+		rand.Shuffle(len(ips), func(i, j int) {
+			ips[i], ips[j] = ips[j], ips[i]
+		})
+	}
+
+	// Create A records for each IP.
+	records := make([]dns.RR, 0, len(ips))
+	for _, ip := range ips {
+		records = append(records, &dns.A{
+			Hdr: dns.RR_Header{
+				Name:   name,
+				Rrtype: dns.TypeA,
+				Class:  dns.ClassINET,
+				// TODO: should we increate the TTL to some reasonably small value like 5-30 seconds to allow
+				//  at least some caching?
+				Ttl: 0,
+			},
+			A: net.ParseIP(ip.String()),
+		})
+	}
+	return records
+}
+
+// parseNameserversFromResolvConf parses the nameservers from /etc/resolv.conf.
+func parseNameserversFromResolvConf() ([]netip.Addr, error) {
+	config, err := dns.ClientConfigFromFile("/etc/resolv.conf")
+	if err != nil {
+		return nil, err
+	}
+
+	var servers []netip.Addr
+	for _, server := range config.Servers {
+		if addr, err := netip.ParseAddr(server); err == nil {
+			servers = append(servers, addr)
+		}
+	}
+
+	return servers, nil
+}
+
+func trimInternalDomain(name string) string {
+	name = dns.CanonicalName(name)
+	if !dns.IsSubDomain(InternalDomain, name) {
+		return name
+	}
+
+	return strings.TrimSuffix(name, "."+InternalDomain)
+}

internal/machine/docker/manager.go

@@ -4,19 +4,19 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"log/slog"
+	"time"
+
 	dockercontainer "github.com/docker/docker/api/types/container"
 	"github.com/docker/docker/api/types/events"
 	"github.com/docker/docker/api/types/filters"
 	"github.com/docker/docker/client"
 	"github.com/psviderski/uncloud/internal/machine/store"
 	"github.com/psviderski/uncloud/pkg/api"
-	"log/slog"
-	"time"
 )
 
 const (
 	NetworkName = "uncloud"
-	UserChain   = "DOCKER-USER"
 	// EventsDebounceInterval defines how long to wait before processing the next Docker event. Multiple events
 	// occurring within this window will be processed together as a single event to prevent system overload.
 	EventsDebounceInterval = 100 * time.Millisecond

internal/machine/docker/manager_darwin.go

@@ -8,7 +8,7 @@ import (
 	"net/netip"
 )
 
-// EnsureUncloudNetwork is a stub for darwin.
+// EnsureUncloudNetwork is a stub for Darwin.
-func (m *Manager) EnsureUncloudNetwork(ctx context.Context, subnet netip.Prefix) error {
+func (m *Manager) EnsureUncloudNetwork(ctx context.Context, subnet netip.Prefix, dnsServer netip.Addr) error {
-	return fmt.Errorf("not supported on darwin")
+	return fmt.Errorf("not supported on Darwin")
 }

internal/machine/docker/manager_linux.go

@@ -3,24 +3,28 @@ package docker
 import (
 	"context"
 	"fmt"
+	"log/slog"
+	"net/netip"
+	"strconv"
+
 	dnetwork "github.com/docker/docker/api/types/network"
 	"github.com/docker/docker/client"
 	"github.com/docker/docker/libnetwork/iptables"
-	"log/slog"
+	"github.com/psviderski/uncloud/internal/machine/dns"
-	"net/netip"
+	"github.com/psviderski/uncloud/internal/machine/firewall"
 	"github.com/psviderski/uncloud/internal/machine/network"
 )
 
 // EnsureUncloudNetwork creates the Docker bridge network NetworkName with the provided machine subnet
 // if it doesn't exist. If the network exists but has a different subnet, it removes and recreates the network.
 // It also configures iptables to allow container access from the WireGuard network.
-func (m *Manager) EnsureUncloudNetwork(ctx context.Context, subnet netip.Prefix) error {
+func (m *Manager) EnsureUncloudNetwork(ctx context.Context, subnet netip.Prefix, dnsServer netip.Addr) error {
 	// Ensure the Docker network 'uncloud' is created with the correct subnet.
 	needsCreation := false
 	nw, err := m.client.NetworkInspect(ctx, NetworkName, dnetwork.InspectOptions{})
 	if err != nil {
 		if !client.IsErrNotFound(err) {
-			return fmt.Errorf("inspect Docker network %q: %w", NetworkName, err)
+			return fmt.Errorf("inspect Docker network '%s': %w", NetworkName, err)
 		}
 		needsCreation = true
 	} else if nw.IPAM.Config[0].Subnet != subnet.String() {
@@ -31,7 +35,7 @@ func (m *Manager) EnsureUncloudNetwork(ctx context.Context, subnet netip.Prefix)
 		)
 		if err = m.client.NetworkRemove(ctx, NetworkName); err != nil {
 			// It can still fail if the network is in use by a container. Leave it to the user to resolve the issue.
-			return fmt.Errorf("remove Docker network %q: %w", NetworkName, err)
+			return fmt.Errorf("remove Docker network '%s': %w", NetworkName, err)
 		}
 		needsCreation = true
 	}
@@ -50,12 +54,12 @@ func (m *Manager) EnsureUncloudNetwork(ctx context.Context, subnet netip.Prefix)
 				},
 			},
 		); err != nil {
-			return fmt.Errorf("create Docker network %q: %w", NetworkName, err)
+			return fmt.Errorf("create Docker network '%s': %w", NetworkName, err)
 		}
 		slog.Info("Docker network created.", "name", NetworkName, "subnet", subnet.String())
 
 		if nw, err = m.client.NetworkInspect(ctx, NetworkName, dnetwork.InspectOptions{}); err != nil {
-			return fmt.Errorf("inspect Docker network %q: %w", NetworkName, err)
+			return fmt.Errorf("inspect Docker network '%s': %w", NetworkName, err)
 		}
 	}
 
@@ -67,10 +71,36 @@ func (m *Manager) EnsureUncloudNetwork(ctx context.Context, subnet netip.Prefix)
 	// Bridge name doesn't seem to be documented but this is the source code where it is generated:
 	// https://github.com/moby/moby/blob/v27.2.1/libnetwork/drivers/bridge/bridge_linux.go#L664
 	bridgeName := "br-" + nw.ID[:12]
+
+	if err = configureIptables(bridgeName, dnsServer); err != nil {
+		return fmt.Errorf("configure iptables for Docker network '%s': %w", NetworkName, err)
+	}
+
+	return nil
+}
+
+// configureIptables configures iptables rules for the uncloud Docker network.
+func configureIptables(bridgeName string, dnsServer netip.Addr) error {
 	ipt := iptables.GetIptable(iptables.IPv4)
-	rule := []string{"--in-interface", network.WireGuardInterfaceName, "--out-interface", bridgeName, "-j", "ACCEPT"}
+	// Allow traffic from other machines and their containers through the WG mesh to the Uncloud containers
-	if err = ipt.ProgramRule(iptables.Filter, UserChain, iptables.Insert, rule); err != nil {
+	// on the machine.
+	wgRule := []string{"--in-interface", network.WireGuardInterfaceName, "--out-interface", bridgeName, "-j", "ACCEPT"}
+	if err := ipt.ProgramRule(iptables.Filter, firewall.DockerUserChain, iptables.Insert, wgRule); err != nil {
 		return fmt.Errorf("insert iptables rule: %w", err)
+	}
+
+	// Allow DNS queries from Uncloud containers to the embedded DNS server.
+	for _, proto := range []string{"udp", "tcp"} {
+		dnsRule := []string{
+			"--in-interface", bridgeName,
+			"--dst", dnsServer.String(),
+			"--protocol", proto,
+			"--dport", strconv.Itoa(dns.Port),
+			"-j", "ACCEPT",
+		}
+		if err := ipt.ProgramRule(iptables.Filter, firewall.UncloudInputChain, iptables.Insert, dnsRule); err != nil {
+			return fmt.Errorf("insert iptables rule: %w", err)
+		}
 	}
 
 	return nil

internal/machine/docker/server.go

@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"io"
 	"log/slog"
+	"net/netip"
 	"regexp"
 	"slices"
 	"strconv"
@@ -30,6 +31,7 @@ import (
 	"github.com/opencontainers/go-digest"
 	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
+	"github.com/psviderski/uncloud/internal/machine/dns"
 	"github.com/psviderski/uncloud/internal/secret"
 	"github.com/psviderski/uncloud/pkg/api"
 	"google.golang.org/grpc"
@@ -45,13 +47,17 @@ type Server struct {
 	pb.UnimplementedDockerServer
 	client *client.Client
 	db     *sqlx.DB
+	// internalDNSIP is a function that returns the IP address of the internal DNS server. It may return an empty
+	// address if the address is unknown (e.g. when the machine is not initialised yet).
+	internalDNSIP func() netip.Addr
 }
 
 // NewServer creates a new Docker gRPC server with the provided Docker client.
-func NewServer(cli *client.Client, db *sqlx.DB) *Server {
+func NewServer(cli *client.Client, db *sqlx.DB, internalDNSIP func() netip.Addr) *Server {
 	return &Server{
-		client: cli,
+		client:        cli,
-		db:     db,
+		db:            db,
+		internalDNSIP: internalDNSIP,
 	}
 }
 
@@ -505,6 +511,16 @@ func (s *Server) CreateServiceContainer(
 		},
 	}
 
+	// Configure the container to use the internal DNS server if it's available.
+	dnsIP := s.internalDNSIP()
+	if dnsIP.IsValid() {
+		hostConfig.DNS = []string{dnsIP.String()}
+		// Optimize DNS resolution for service discovery by appending the search domain to names without a dot.
+		// For example, the first attempt for "my-service" will be "my-service.internal".
+		hostConfig.DNSOptions = []string{"ndots:1"}
+		hostConfig.DNSSearch = []string{dns.InternalDomain}
+	}
+
 	if spec.Container.LogDriver != nil {
 		hostConfig.LogConfig = container.LogConfig{
 			Type:   spec.Container.LogDriver.Name,

internal/machine/firewall/iptables_darwin.go

@@ -0,0 +1,8 @@
+package firewall
+
+import "fmt"
+
+// ConfigureIptablesChains is a stub for Darwin.
+func ConfigureIptablesChains() error {
+	return fmt.Errorf("not supported on Darwin")
+}

internal/machine/firewall/iptables_linux.go

@@ -0,0 +1,74 @@
+package firewall
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+
+	"github.com/docker/docker/libnetwork/iptables"
+	"github.com/psviderski/uncloud/internal/machine/network"
+)
+
+const (
+	DockerUserChain   = "DOCKER-USER"
+	UncloudInputChain = "UNCLOUD-INPUT"
+)
+
+// ConfigureIptablesChains sets up custom iptables chains and initial firewall rules for Uncloud networking.
+func ConfigureIptablesChains() error {
+	// Ensure iptables UNCLOUD-INPUT chain with a RETURN rule exists. All existing rules are flushed.
+	ipt := iptables.GetIptable(iptables.IPv4)
+	if _, err := ipt.NewChain(UncloudInputChain, iptables.Filter); err != nil {
+		return fmt.Errorf("create iptables chain '%s': %w", UncloudInputChain, err)
+	}
+	if err := ipt.RawCombinedOutput("-t", string(iptables.Filter), "-F", UncloudInputChain); err != nil {
+		return fmt.Errorf("flush iptables chain '%s': %w", UncloudInputChain, err)
+	}
+	if err := ipt.AddReturnRule(UncloudInputChain); err != nil {
+		return fmt.Errorf("add the RETURN rule for iptables chain '%s': %w", UncloudInputChain, err)
+	}
+
+	// Ensure the main iptables INPUT chain has a jump rule to the UNCLOUD-INPUT chain before any DROP/REJECT rules.
+	jumpRule := []string{"-m", "comment", "--comment", "Uncloud-managed", "-j", UncloudInputChain}
+	if !ipt.Exists(iptables.Filter, "INPUT", jumpRule...) {
+		// Look for the first DROP/REJECT rule in the INPUT chain.
+		out, err := ipt.Raw("-t", string(iptables.Filter), "-L", "INPUT", "--line-numbers")
+		if err != nil {
+			return fmt.Errorf("get iptables rules for chain '%s': %w", UncloudInputChain, err)
+		}
+
+		firstRejectRuleNum := 0
+		for _, line := range strings.Split(string(out), "\n") {
+			fields := strings.Fields(line)
+			if len(fields) < 2 {
+				continue
+			}
+			if fields[1] == "DROP" || fields[1] == "REJECT" {
+				if ruleNum, err := strconv.Atoi(fields[0]); err == nil {
+					firstRejectRuleNum = ruleNum
+					break
+				}
+			}
+		}
+
+		var addJumpRule []string
+		if firstRejectRuleNum > 0 {
+			addJumpRule = append([]string{"-t", string(iptables.Filter), "-I", "INPUT", strconv.Itoa(firstRejectRuleNum)},
+				jumpRule...)
+		} else {
+			addJumpRule = append([]string{"-t", string(iptables.Filter), "-A", "INPUT"}, jumpRule...)
+		}
+		if err = ipt.RawCombinedOutput(addJumpRule...); err != nil {
+			return fmt.Errorf("add iptables rule '%s': %w", strings.Join(addJumpRule, " "), err)
+		}
+	}
+
+	// Allow WireGuard traffic to the machine.
+	acceptWireGuardRule := []string{"-p", "udp", "--dport", strconv.Itoa(network.WireGuardPort), "-j", "ACCEPT"}
+	err := ipt.ProgramRule(iptables.Filter, UncloudInputChain, iptables.Insert, acceptWireGuardRule)
+	if err != nil {
+		return fmt.Errorf("insert iptables rule '%s': %w", strings.Join(acceptWireGuardRule, " "), err)
+	}
+
+	return nil
+}

internal/machine/machine.go

@@ -21,9 +21,10 @@ import (
 	"github.com/psviderski/uncloud/internal/fs"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 	apiproxy "github.com/psviderski/uncloud/internal/machine/api/proxy"
-	"github.com/psviderski/uncloud/internal/machine/caddyfile"
+	"github.com/psviderski/uncloud/internal/machine/caddyconfig"
 	"github.com/psviderski/uncloud/internal/machine/cluster"
 	"github.com/psviderski/uncloud/internal/machine/corroservice"
+	"github.com/psviderski/uncloud/internal/machine/dns"
 	machinedocker "github.com/psviderski/uncloud/internal/machine/docker"
 	"github.com/psviderski/uncloud/internal/machine/network"
 	"github.com/psviderski/uncloud/internal/machine/store"
@@ -62,6 +63,8 @@ type Config struct {
 	// CaddyConfigPath specifies where the machine generates the Caddy reverse proxy configuration file for routing
 	// external traffic to service containers across the internal network. Default is DataDir/caddy/caddy.json.
 	CaddyConfigPath string
+	// DNSUpstreams specifies the upstream DNS servers for the embedded internal DNS server.
+	DNSUpstreams []netip.AddrPort
 }
 
 // SetDefaults returns a new Config with default values set where not provided.
@@ -206,7 +209,7 @@ func NewMachine(config *Config) (*Machine, error) {
 	}
 	c := cluster.NewCluster(corroStore, corroAdmin)
 
-	// Init a gRPC Docker server that proxies requests to the local Docker daemon.
+	// Init dependencies for a gRPC Docker server that proxies requests to the local Docker daemon.
 	dockerCli, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
 	if err != nil {
 		return nil, fmt.Errorf("create Docker client: %w", err)
@@ -217,7 +220,6 @@ func NewMachine(config *Config) (*Machine, error) {
 	if err != nil {
 		return nil, fmt.Errorf("init machine database: %w", err)
 	}
-	dockerServer := machinedocker.NewServer(dockerCli, db)
 
 	// Init a local gRPC proxy server that proxies requests to the local or remote machine API servers.
 	proxyDirector := apiproxy.NewDirector(config.MachineSockPath, APIPort)
@@ -235,11 +237,16 @@ func NewMachine(config *Config) (*Machine, error) {
 		initialised:      make(chan struct{}, 1),
 		store:            corroStore,
 		cluster:          c,
-		docker:           dockerServer,
 		localProxyServer: localProxyServer,
 		proxyDirector:    proxyDirector,
 	}
-	m.localMachineServer = newGRPCServer(m, c, dockerServer)
+
+	// Machine IP will only be available after the machine is initialised as a cluster member so wrap it in a function.
+	internalDNSIP := func() netip.Addr {
+		return m.IP()
+	}
+	m.docker = machinedocker.NewServer(dockerCli, db, internalDNSIP)
+	m.localMachineServer = newGRPCServer(m, c, m.docker)
 
 	if m.Initialised() {
 		m.initialised <- struct{}{}
@@ -270,6 +277,15 @@ func (m *Machine) Initialised() bool {
 	return m.state.ID != ""
 }
 
+// IP returns the machine IPv4 address in the cluster network which is the first address in the machine subnet.
+func (m *Machine) IP() netip.Addr {
+	if !m.Initialised() {
+		return netip.Addr{}
+	}
+
+	return network.MachineIP(m.state.Network.Subnet)
+}
+
 func (m *Machine) Run(ctx context.Context) error {
 	// Docker dependency is essential for the machine to function. Block until it's ready.
 	if err := docker.WaitDaemonReady(ctx, m.config.DockerClient); err != nil {
@@ -368,11 +384,17 @@ func (m *Machine) Run(ctx context.Context) error {
 
 					// Create a new Caddyfile controller for managing the Caddy reverse proxy configuration.
 					// It will also serve the current machine ID at /.uncloud-verify to verify Caddy reachability.
-					caddyfileCtrl, err := caddyfile.NewController(m.store, m.config.CaddyConfigPath, m.state.ID)
+					caddyfileCtrl, err := caddyconfig.NewController(m.store, m.config.CaddyConfigPath, m.state.ID)
 					if err != nil {
 						return fmt.Errorf("create Caddyfile controller: %w", err)
 					}
 
+					dnsResolver := dns.NewClusterResolver(m.store)
+					dnsServer, err := dns.NewServer(m.IP(), dnsResolver, m.config.DNSUpstreams)
+					if err != nil {
+						return fmt.Errorf("create embedded DNS server: %w", err)
+					}
+
 					ctrl, err = newNetworkController(
 						m.state,
 						m.store,
@@ -380,6 +402,8 @@ func (m *Machine) Run(ctx context.Context) error {
 						m.config.CorrosionService,
 						m.config.DockerClient,
 						caddyfileCtrl,
+						dnsServer,
+						dnsResolver,
 					)
 					if err != nil {
 						return fmt.Errorf("initialise network controller: %w", err)
@@ -520,6 +544,38 @@ func (m *Machine) configureCorrosion() error {
 	return nil
 }
 
+// CheckPrerequisites verifies if the machine meets all necessary system requirements to participate in the cluster.
+func (m *Machine) CheckPrerequisites(ctx context.Context, _ *emptypb.Empty) (*pb.CheckPrerequisitesResponse, error) {
+	// Check DNS port (UDP) availability.
+	if err := checkDNSPortAvailable(); err != nil {
+		return &pb.CheckPrerequisitesResponse{
+			Satisfied: false,
+			Error:     err.Error(),
+		}, nil
+	}
+
+	return &pb.CheckPrerequisitesResponse{
+		Satisfied: true,
+	}, nil
+}
+
+// checkDNSPortAvailable verifies that DNS port 53/udp is available for Uncloud's embedded DNS service.
+func checkDNSPortAvailable() error {
+	addr := &net.UDPAddr{
+		IP:   net.IPv4(127, 0, 0, 210), // Use a unique loopback address to avoid conflicts.
+		Port: dns.Port,
+	}
+	conn, err := net.ListenUDP("udp", addr)
+	if err != nil {
+		return fmt.Errorf("DNS port %d/udp is already in use by another service: %w. Uncloud needs this port "+
+			"to run the embedded internal DNS service on WireGuard interface 'uncloud'. Please reconfigure "+
+			"any DNS servers (like dnsmasq, systemd-resolved, or named) that might be listening on all network "+
+			"interfaces (0.0.0.0) on the machine and try again", dns.Port, err)
+	}
+	conn.Close()
+	return nil
+}
+
 // InitCluster initialises a new cluster on the local machine with the provided network configuration.
 func (m *Machine) InitCluster(ctx context.Context, req *pb.InitClusterRequest) (*pb.InitClusterResponse, error) {
 	if m.Initialised() {

internal/machine/network.go

@@ -4,22 +4,25 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"github.com/cenkalti/backoff/v4"
-	"github.com/docker/docker/client"
-	"golang.org/x/sync/errgroup"
-	"google.golang.org/grpc"
 	"log/slog"
 	"net"
 	"net/netip"
 	"slices"
 	"strconv"
 	"time"
+
+	"github.com/cenkalti/backoff/v4"
+	"github.com/docker/docker/client"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
-	"github.com/psviderski/uncloud/internal/machine/caddyfile"
+	"github.com/psviderski/uncloud/internal/machine/caddyconfig"
 	"github.com/psviderski/uncloud/internal/machine/corroservice"
+	"github.com/psviderski/uncloud/internal/machine/dns"
 	"github.com/psviderski/uncloud/internal/machine/docker"
+	"github.com/psviderski/uncloud/internal/machine/firewall"
 	"github.com/psviderski/uncloud/internal/machine/network"
 	"github.com/psviderski/uncloud/internal/machine/store"
+	"golang.org/x/sync/errgroup"
+	"google.golang.org/grpc"
 )
 
 const (
@@ -36,10 +39,11 @@ type networkController struct {
 	server        *grpc.Server
 	corroService  corroservice.Service
 	dockerCli     *client.Client
-	caddyfileCtrl *caddyfile.Controller
+	caddyfileCtrl *caddyconfig.Controller
 
-	// TODO: DNS server/resolver listening on the machine IP, e.g. 10.210.0.1:53. It can't listen on 127.0.X.X
+	// dnsServer is the embedded internal DNS server for the cluster listening on the machine IP.
-	//  like resolved does because it needs to be reachable from both the host and the containers.
+	dnsServer   *dns.Server
+	dnsResolver *dns.ClusterResolver
 }
 
 func newNetworkController(
@@ -48,7 +52,9 @@ func newNetworkController(
 	server *grpc.Server,
 	corroService corroservice.Service,
 	dockerCli *client.Client,
-	caddyfileCtrl *caddyfile.Controller,
+	caddyfileCtrl *caddyconfig.Controller,
+	dnsServer *dns.Server,
+	dnsResolver *dns.ClusterResolver,
 ) (
 	*networkController, error,
 ) {
@@ -68,10 +74,16 @@ func newNetworkController(
 		corroService:    corroService,
 		dockerCli:       dockerCli,
 		caddyfileCtrl:   caddyfileCtrl,
+		dnsServer:       dnsServer,
+		dnsResolver:     dnsResolver,
 	}, nil
 }
 
 func (nc *networkController) Run(ctx context.Context) error {
+	if err := firewall.ConfigureIptablesChains(); err != nil {
+		return fmt.Errorf("configure iptables chains: %w", err)
+	}
+
 	if err := nc.wgnet.Configure(*nc.state.Network); err != nil {
 		return fmt.Errorf("configure WireGuard network: %w", err)
 	}
@@ -110,65 +122,73 @@ func (nc *networkController) Run(ctx context.Context) error {
 		},
 	)
 
+	errGroup.Go(func() error {
+		slog.Info("Starting embedded DNS resolver.")
+		if err := nc.dnsResolver.Run(ctx); err != nil {
+			return fmt.Errorf("embedded DNS resolver failed: %w", err)
+		}
+		return nil
+	})
+
+	errGroup.Go(func() error {
+		slog.Info("Starting embedded DNS server.")
+		if err := nc.dnsServer.Run(ctx); err != nil {
+			return fmt.Errorf("embedded DNS server failed: %w", err)
+		}
+		return nil
+	})
+
 	// Setup Docker network and synchronise containers to the cluster store.
-	errGroup.Go(
+	errGroup.Go(func() error {
-		func() error {
+		return nc.prepareAndWatchDocker(ctx)
-			return nc.prepareAndWatchDocker(ctx)
+	})
-		},
-	)
 
 	// Handle machine changes in the cluster. Handling machine and endpoint changes should be done
 	// in separate goroutines to avoid a deadlock when reconfiguring the network.
-	errGroup.Go(
+	errGroup.Go(func() error {
-		func() error {
+		if err := nc.handleMachineChanges(ctx); err != nil {
-			if err := nc.handleMachineChanges(ctx); err != nil {
+			return fmt.Errorf("handle new machines: %w", err)
-				return fmt.Errorf("handle new machines: %w", err)
+		}
-			}
+		return nil
-			return nil
+	})
-		},
-	)
 
 	// Watch for endpoint changes and update the machine state accordingly.
-	errGroup.Go(
+	errGroup.Go(func() error {
-		func() error {
+		for {
-			for {
+			select {
-				select {
+			case e, ok := <-nc.endpointChanges:
-				case e, ok := <-nc.endpointChanges:
+				if !ok {
-					if !ok {
+					// The channel was closed, stop watching for changes.
-						// The channel was closed, stop watching for changes.
+					nc.endpointChanges = nil
-						nc.endpointChanges = nil
-						return nil
-					}
-
-					nc.state.mu.Lock()
-					for i := range nc.state.Network.Peers {
-						if nc.state.Network.Peers[i].PublicKey.Equal(e.PublicKey) {
-							nc.state.Network.Peers[i].Endpoint = &e.Endpoint
-							break
-						}
-					}
-					if err := nc.state.Save(); err != nil {
-						slog.Error("Failed to save machine state.", "err", err)
-					}
-					nc.state.mu.Unlock()
-
-					slog.Debug("Preserved endpoint change in the machine state.",
-						"public_key", e.PublicKey, "endpoint", e.Endpoint)
-				case <-ctx.Done():
 					return nil
 				}
-			}
-		},
-	)
 
-	errGroup.Go(
+				nc.state.mu.Lock()
-		func() error {
+				for i := range nc.state.Network.Peers {
-			if err := nc.wgnet.Run(ctx); err != nil {
+					if nc.state.Network.Peers[i].PublicKey.Equal(e.PublicKey) {
-				return fmt.Errorf("WireGuard network failed: %w", err)
+						nc.state.Network.Peers[i].Endpoint = &e.Endpoint
+						break
+					}
+				}
+				if err := nc.state.Save(); err != nil {
+					slog.Error("Failed to save machine state.", "err", err)
+				}
+				nc.state.mu.Unlock()
+
+				slog.Debug("Preserved endpoint change in the machine state.",
+					"public_key", e.PublicKey, "endpoint", e.Endpoint)
+			case <-ctx.Done():
+				return nil
 			}
-			return nil
+		}
-		},
+	})
-	)
+
+	errGroup.Go(func() error {
+		if err := nc.wgnet.Run(ctx); err != nil {
+			return fmt.Errorf("WireGuard network failed: %w", err)
+		}
+		return nil
+	})
 
 	errGroup.Go(func() error {
 		slog.Info("Starting Caddyfile controller.")
@@ -180,16 +200,14 @@ func (nc *networkController) Run(ctx context.Context) error {
 	})
 
 	// Wait for the context to be done and stop the network API server.
-	errGroup.Go(
+	errGroup.Go(func() error {
-		func() error {
+		<-ctx.Done()
-			<-ctx.Done()
+		slog.Info("Stopping network API server.")
-			slog.Info("Stopping network API server.")
+		// TODO: implement timeout for graceful shutdown.
-			// TODO: implement timeout for graceful shutdown.
+		nc.server.GracefulStop()
-			nc.server.GracefulStop()
+		slog.Info("Network API server stopped.")
-			slog.Info("Network API server stopped.")
+		return nil
-			return nil
+	})
-		},
-	)
 
 	return errGroup.Wait()
 }
@@ -202,7 +220,7 @@ func (nc *networkController) prepareAndWatchDocker(ctx context.Context) error {
 		return fmt.Errorf("wait for Docker daemon: %w", err)
 	}
 
-	if err := manager.EnsureUncloudNetwork(ctx, nc.state.Network.Subnet); err != nil {
+	if err := manager.EnsureUncloudNetwork(ctx, nc.state.Network.Subnet, nc.dnsServer.ListenAddr()); err != nil {
 		return fmt.Errorf("ensure Docker network: %w", err)
 	}
 	slog.Info("Docker network configured.")

internal/machine/network/config.go

@@ -2,10 +2,11 @@ package network
 
 import (
 	"fmt"
-	"github.com/psviderski/uncloud/internal/secret"
-	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
 	"net"
 	"net/netip"
+
+	"github.com/psviderski/uncloud/internal/secret"
+	"golang.zx2c4.com/wireguard/wgctrl/wgtypes"
 )
 
 type Config struct {
@@ -13,7 +14,7 @@ type Config struct {
 	// in the subnet. Other IP addresses are allocated to containers running on the machine.
 	Subnet netip.Prefix
 	// ManagementIP is the IPv6 address assigned to the machine within the WireGuard network. This address is used
-	// for cluster management traffic, such as gRPC communication with the machine API server and Serf gossip.
+	// for cluster management traffic, such as gRPC communication with the machine API server and Corrosion gossip.
 	ManagementIP netip.Addr
 	PrivateKey   secret.Secret
 	PublicKey    secret.Secret
@@ -23,7 +24,7 @@ type Config struct {
 type PeerConfig struct {
 	Subnet *netip.Prefix `json:",omitempty"`
 	// ManagementIP is the IPv6 address assigned to the peer within the WireGuard network. This address is used
-	// for cluster management traffic, such as gRPC communication with the machine API server and Serf gossip.
+	// for cluster management traffic, such as gRPC communication with the machine API server and Corrosion gossip.
 	ManagementIP netip.Addr
 	Endpoint     *netip.AddrPort  `json:",omitempty"`
 	AllEndpoints []netip.AddrPort `json:",omitempty"`

internal/machine/network/ip.go

@@ -2,9 +2,10 @@ package network
 
 import (
 	"fmt"
-	"github.com/psviderski/uncloud/internal/secret"
 	"net"
 	"net/netip"
+
+	"github.com/psviderski/uncloud/internal/secret"
 )
 
 // MachineIP returns the IP address of the machine which is the first address in the subnet.

internal/sshexec/ssh.go

@@ -7,6 +7,7 @@ import (
 	"strconv"
 	"time"
 
+	"github.com/psviderski/uncloud/internal/fs"
 	"golang.org/x/crypto/ssh"
 	"golang.org/x/crypto/ssh/agent"
 )
@@ -63,6 +64,7 @@ func sshAgentAuth() (ssh.AuthMethod, func(), error) {
 }
 
 func privateKeyAuth(path string) (ssh.AuthMethod, error) {
+	path = fs.ExpandHomeDir(path)
 	key, err := os.ReadFile(path)
 	if err != nil {
 		return nil, fmt.Errorf("read private key file %q: %w", path, err)

internal/ucind/cluster.go

@@ -12,6 +12,7 @@ import (
 	"github.com/docker/docker/api/types/filters"
 	"github.com/docker/docker/api/types/network"
 	dockerclient "github.com/docker/docker/client"
+	"github.com/docker/go-connections/nat"
 	"github.com/psviderski/uncloud/internal/machine"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 	"github.com/psviderski/uncloud/internal/machine/cluster"
@@ -30,6 +31,8 @@ type Cluster struct {
 
 type CreateClusterOptions struct {
 	Machines int
+	// Ports to forward from the cluster machines to the host.
+	PortMap nat.PortMap
 }
 
 func (c *Cluster) PopulateMachineIDs(ctx context.Context) error {
@@ -72,7 +75,7 @@ func (p *Provisioner) CreateCluster(ctx context.Context, name string, opts Creat
 			ManagedLabel:     "",
 		},
 	}
-	// Create a Docker network with the same as the cluster name.
+	// Create a Docker network with the same name as the cluster name.
 	if _, err = p.dockerCli.NetworkCreate(ctx, name, netOpts); err != nil {
 		return c, fmt.Errorf("create Docker network '%s': %w", name, err)
 	}
@@ -81,7 +84,8 @@ func (p *Provisioner) CreateCluster(ctx context.Context, name string, opts Creat
 	// Create machines (containers) in the created cluster network.
 	for i := 1; i < opts.Machines+1; i++ {
 		mopts := CreateMachineOptions{
-			Name: fmt.Sprintf("machine-%d", i),
+			Name:    fmt.Sprintf("machine-%d", i),
+			PortMap: opts.PortMap,
 		}
 		m, err := p.CreateMachine(ctx, name, mopts)
 		if err != nil {

internal/ucind/machine.go

@@ -42,6 +42,8 @@ func (m *Machine) Connect(ctx context.Context) (*client.Client, error) {
 type CreateMachineOptions struct {
 	Name  string
 	Image string
+	// Ports to forward from the machine to the host.
+	PortMap nat.PortMap
 }
 
 func (p *Provisioner) CreateMachine(ctx context.Context, clusterName string, opts CreateMachineOptions) (Machine, error) {
@@ -88,6 +90,16 @@ func (p *Provisioner) CreateMachine(ctx context.Context, clusterName string, opt
 			Name: container.RestartPolicyAlways,
 		},
 	}
+	// Forward ports, if requested
+	if opts.PortMap != nil {
+		for port, bindings := range opts.PortMap {
+			if len(bindings) == 0 {
+				continue
+			}
+			config.ExposedPorts[port] = struct{}{}
+			hostConfig.PortBindings[port] = bindings
+		}
+	}
 
 	if _, err := p.createContainerWithImagePull(ctx, containerName, config, hostConfig); err != nil {
 		return m, err
@@ -160,10 +172,7 @@ func (p *Provisioner) waitPortPublished(ctx context.Context, containerID string,
 		}
 
 		binding, ok := c.NetworkSettings.Ports[port]
-		if !ok {
+		if ok && len(binding) > 0 {
-			return nil, fmt.Errorf("port '%s' not published", port)
-		}
-		if len(binding) > 0 {
 			return binding, nil
 		}
 
@@ -196,7 +205,7 @@ func WaitMachineReady(ctx context.Context, m Machine, timeout time.Duration) err
 
 	boff := backoff.WithContext(backoff.NewExponentialBackOff(
 		backoff.WithInitialInterval(100*time.Millisecond),
-		backoff.WithMaxInterval(1*time.Second),
+		backoff.WithMaxInterval(10*time.Second),
 		backoff.WithMaxElapsedTime(timeout),
 	), ctx)
 

internal/version/version.go

@@ -0,0 +1,7 @@
+package version
+
+var version string
+
+func String() string {
+	return version
+}

pkg/api/container.go

@@ -3,6 +3,7 @@ package api
 import (
 	"encoding/json"
 	"fmt"
+	"net/netip"
 	"strings"
 	"time"
 
@@ -11,6 +12,9 @@ import (
 )
 
 const (
+	// DockerNetworkName is the name of the Docker network used by uncloud. Keep the value in sync with NetworkName
+	// in internal/machine/docker/manager.go.
+	DockerNetworkName = "uncloud"
 	LabelManaged      = "uncloud.managed"
 	LabelServiceID    = "uncloud.service.id"
 	LabelServiceName  = "uncloud.service.name"
@@ -90,6 +94,22 @@ func (c *Container) HumanState() (string, error) {
 		c.State.ExitCode, units.HumanDuration(time.Now().UTC().Sub(finishedAt))), nil
 }
 
+// UncloudNetworkIP returns the IP address of the container in the uncloud Docker network.
+func (c *Container) UncloudNetworkIP() netip.Addr {
+	network, ok := c.NetworkSettings.Networks[DockerNetworkName]
+	if !ok {
+		// Container is not connected to the uncloud Docker network (could be host network).
+		return netip.Addr{}
+	}
+
+	ip, err := netip.ParseAddr(network.IPAddress)
+	if err != nil {
+		return netip.Addr{}
+	}
+
+	return ip
+}
+
 func (c *Container) UnmarshalJSON(data []byte) error {
 	// A temporary type that's identical to Container but doesn't have the UnmarshalJSON method.
 	type ContainerAlias Container

pkg/api/service.go

@@ -31,6 +31,7 @@ const (
 )
 
 var serviceIDRegexp = regexp.MustCompile("^[0-9a-f]{32}$")
+var dnsLabelRegexp = regexp.MustCompile(`^[a-z0-9]([-a-z0-9]*[a-z0-9])?$`)
 
 func ValidateServiceID(id string) bool {
 	return serviceIDRegexp.MatchString(id)
@@ -103,8 +104,15 @@ func (s *ServiceSpec) Validate() error {
 	default:
 		return fmt.Errorf("invalid mode: %q", s.Mode)
 	}
-
+	
-	// TODO: validate the service name is a valid DNS label.
+	if s.Name != "" {
+		if len(s.Name) > 63 {
+			return fmt.Errorf("service name too long (max 63 characters): %q", s.Name)
+		}
+		if !dnsLabelRegexp.MatchString(s.Name) {
+			return fmt.Errorf("invalid service name: %q. must be 1-63 characters, lowercase letters, numbers, and dashes only; must start and end with a letter or number", s.Name)
+		}
+	}
 
 	for _, p := range s.Ports {
 		if (p.Mode == "" || p.Mode == PortModeIngress) &&
@@ -138,6 +146,7 @@ func (s *ServiceSpec) Validate() error {
 	return nil
 }
 
+
 func (s *ServiceSpec) Clone() ServiceSpec {
 	spec := *s
 

pkg/client/caddy.go

@@ -24,12 +24,12 @@ var caddyImageTagRegex = regexp.MustCompile(`^2\.\d+\.\d+$`)
 // The service is deployed in global mode to all machines in the cluster. If the image is not provided, the latest
 // version of the official Caddy Docker image is used.
 func (cli *Client) NewCaddyDeployment(image string, placement api.Placement) (*deploy.Deployment, error) {
-	latest, err := LatestCaddyImage()
-	if err != nil {
-		return nil, fmt.Errorf("look up latest Caddy image: %w", err)
-	}
-
 	if image == "" {
+		latest, err := LatestCaddyImage()
+		if err != nil {
+			return nil, fmt.Errorf("look up latest Caddy image: %w", err)
+		}
+
 		image = reference.FamiliarString(latest)
 	}
 

pkg/client/compose/project.go

@@ -13,9 +13,8 @@ import (
 // FakeProjectName is a placeholder name for the project to be able to strip it from the resource names used as prefix.
 const FakeProjectName = "f-a-k-e"
 
-func LoadProject(ctx context.Context, paths []string) (*types.Project, error) {
+func LoadProject(ctx context.Context, paths []string, opts ...composecli.ProjectOptionsFn) (*types.Project, error) {
-	options, err := composecli.NewProjectOptions(
+	defaultOpts := []composecli.ProjectOptionsFn{
-		paths,
 		composecli.WithName(FakeProjectName),
 		// First apply os.Environment, always wins.
 		composecli.WithOsEnv,
@@ -23,9 +22,14 @@ func LoadProject(ctx context.Context, paths []string) (*types.Project, error) {
 		composecli.WithDotEnv,
 		// Get compose file path set by COMPOSE_FILE.
 		composecli.WithConfigFileEnv,
-		// If none was selected, get default compose-ports-long.yaml file from current dir or parent folders.
+		// If none was selected, get default Compose file names from current or parent folders.
 		composecli.WithDefaultConfigPath,
 		composecli.WithExtension(PortsExtensionKey, PortsSource{}),
+	}
+
+	options, err := composecli.NewProjectOptions(
+		paths,
+		append(defaultOpts, opts...)...,
 	)
 	if err != nil {
 		return nil, fmt.Errorf("create compose parser options: %w", err)

pkg/client/dns.go

@@ -7,7 +7,7 @@ import (
 	"github.com/cenkalti/backoff/v4"
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
-	"github.com/psviderski/uncloud/internal/machine/caddyfile"
+	"github.com/psviderski/uncloud/internal/machine/caddyconfig"
 	"github.com/psviderski/uncloud/pkg/api"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
@@ -110,7 +110,7 @@ func verifyCaddyReachable(ctx context.Context, m *pb.MachineInfo) error {
 	eventID := fmt.Sprintf("Machine %s (%s)", m.Name, publicIP)
 	pw.Event(progress.NewEvent(eventID, progress.Working, "Querying"))
 
-	verifyURL := fmt.Sprintf("http://%s%s", publicIP, caddyfile.VerifyPath)
+	verifyURL := fmt.Sprintf("http://%s%s", publicIP, caddyconfig.VerifyPath)
 
 	req, err := http.NewRequestWithContext(ctx, http.MethodGet, verifyURL, nil)
 	if err != nil {

scripts/docker/entrypoint.sh

@@ -6,7 +6,7 @@ cleanup() {
     echo "Terminating container processes..."
 
     # Terminate the main process if it has been started.
-    if [ -n "$MAIN_PID" ]; then
+    if [ -n "${MAIN_PID:-}" ]; then
         kill "$MAIN_PID" 2>/dev/null || true
     fi
 

test/e2e/compose_build_test.go

@@ -0,0 +1,163 @@
+package e2e
+
+import (
+	"context"
+	"fmt"
+	"path"
+	"strconv"
+	"testing"
+
+	composecli "github.com/compose-spec/compose-go/v2/cli"
+	"github.com/compose-spec/compose-go/v2/types"
+	"github.com/docker/docker/api/types/image"
+	dockerclient "github.com/docker/docker/client"
+	"github.com/docker/go-connections/nat"
+	"github.com/google/go-containerregistry/pkg/name"
+	"github.com/google/go-containerregistry/pkg/v1/remote"
+	"github.com/psviderski/uncloud/internal/cli"
+	cliInternal "github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/ucind"
+	"github.com/psviderski/uncloud/pkg/api"
+	"github.com/psviderski/uncloud/pkg/client/compose"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestComposeBuild(t *testing.T) {
+	t.Parallel()
+
+	clusterName := "ucind-test.compose-build"
+	ctx := context.Background()
+
+	registryInternalPort := "5000/tcp"
+	clusterOpts := ucind.CreateClusterOptions{
+		Machines: 1,
+		PortMap: nat.PortMap{
+			// Forwarding the registry port to the host.
+			nat.Port(registryInternalPort): []nat.PortBinding{
+				{
+					HostIP: "127.0.0.1",
+					// Host port is a random available port.
+				},
+			},
+		},
+	}
+	c, _ := createTestCluster(t, clusterName, clusterOpts, true)
+
+	machine := c.Machines[0]
+	client, err := machine.Connect(ctx)
+	require.NoError(t, err)
+
+	// Get the (random) assigned host port for the future registry service
+	dockerCli, err := dockerclient.NewClientWithOpts(dockerclient.FromEnv, dockerclient.WithAPIVersionNegotiation())
+	require.NoError(t, err)
+	containerInfo, err := dockerCli.ContainerInspect(ctx, machine.ContainerName)
+	require.NoError(t, err)
+	portMap := containerInfo.NetworkSettings.Ports
+	registryHostPortStr := portMap[nat.Port(registryInternalPort)][0].HostPort
+	registryHostPort, err := strconv.Atoi(registryHostPortStr)
+	require.NoError(t, err)
+	assert.True(t, registryHostPort > 0, "Expected host port to be a valid number")
+
+	t.Run("build and push images for a basic project", func(t *testing.T) {
+		t.Parallel()
+
+		registryServiceName := "registry"
+		t.Cleanup(func() {
+			removeServices(t, client, registryServiceName)
+		})
+
+		// Start registry
+		resp, err := client.RunService(ctx, api.ServiceSpec{
+			Name: registryServiceName,
+			Mode: api.ServiceModeReplicated,
+			Container: api.ContainerSpec{
+				Image: "registry:2",
+			},
+			Ports: []api.PortSpec{
+				{
+					ContainerPort: 5000,
+					PublishedPort: 5000,
+					Mode:          api.PortModeHost,
+					Protocol:      api.ProtocolTCP,
+				},
+			},
+		})
+		require.NoError(t, err)
+		assert.NotEmpty(t, resp.ID)
+		assert.Equal(t, "registry", resp.Name)
+
+		project, err := compose.LoadProject(
+			ctx,
+			[]string{"fixtures/compose-build-basic/compose.yaml"},
+			composecli.WithEnv([]string{
+				fmt.Sprintf("TEST_REGISTRY_PORT=%s", registryHostPortStr),
+			}),
+		)
+		require.NoError(t, err)
+		servicesToBuild := cliInternal.GetServicesThatNeedBuild(project)
+		serviceImage1 := fmt.Sprintf("127.0.0.1:%d/service-first", registryHostPort)
+		serviceImage2 := fmt.Sprintf("127.0.0.1:%d/service-second:version2", registryHostPort)
+		t.Cleanup(func() {
+			// Remove the images after the test
+			removeOptions := image.RemoveOptions{Force: true, PruneChildren: true}
+			_, err := dockerCli.ImageRemove(ctx, serviceImage1, removeOptions)
+			assert.NoErrorf(t, err, "failed to remove image %s on test cleanup: %w", serviceImage1, err)
+			_, err = dockerCli.ImageRemove(ctx, serviceImage2, removeOptions)
+			assert.NoErrorf(t, err, "failed to remove image %s on test cleanup: %w", serviceImage2, err)
+		})
+
+		servicesToBuildExpected := map[string]types.ServiceConfig{
+			"service-first": {
+				Name: "service-first",
+				Build: &types.BuildConfig{
+					Context:    path.Join(project.WorkingDir, "service-first-dir"),
+					Dockerfile: "Dockerfile",
+				},
+				Image:       serviceImage1,
+				Environment: types.NewMappingWithEquals([]string{}),
+				Networks: map[string]*types.ServiceNetworkConfig{
+					"default": nil,
+				},
+			},
+			"service-second": {
+				Name: "service-second",
+				Build: &types.BuildConfig{
+					Context:    path.Join(project.WorkingDir, "service-second-dir"),
+					Dockerfile: "Dockerfile.alt",
+				},
+				Image:       serviceImage2,
+				Environment: types.NewMappingWithEquals([]string{}),
+				Networks: map[string]*types.ServiceNetworkConfig{
+					"default": nil,
+				},
+			},
+		}
+		assert.Equal(t, servicesToBuildExpected, servicesToBuild)
+
+		// Build and push the images
+		buildOpts := cli.BuildOptions{
+			Push:    true,
+			NoCache: false,
+		}
+		cli.BuildServices(context.Background(), servicesToBuild, buildOpts)
+
+		// Check the image of the first service
+		ref1, err := name.NewRepository(fmt.Sprintf("127.0.0.1:%d/service-first", registryHostPort))
+		require.NoError(t, err)
+		tags, err := remote.List(ref1)
+		require.NoError(t, err)
+
+		assert.Equal(t, tags, []string{"latest"}, "Tags for service service-first do not match")
+
+		// Check the image of the second service
+		ref2, err := name.NewRepository(fmt.Sprintf("127.0.0.1:%d/service-second", registryHostPort))
+		require.NoError(t, err)
+		tags, err = remote.List(ref2)
+		require.NoError(t, err)
+
+		assert.Equal(t, tags, []string{"version2"}, "Tags for service service-second do not match")
+
+	})
+}

test/e2e/compose_deploy_test.go

@@ -16,7 +16,7 @@ import (
 func TestComposeDeployment(t *testing.T) {
 	t.Parallel()
 
-	clusterName := "ucind-test.compose"
+	clusterName := "ucind-test.compose-deploy"
 	ctx := context.Background()
 	c, _ := createTestCluster(t, clusterName, ucind.CreateClusterOptions{Machines: 3}, true)
 

test/e2e/fixtures/compose-build-basic/compose.yaml

@@ -0,0 +1,14 @@
+services:
+  service-no-build:
+    image: portainer/pause:3.9
+
+  service-first:
+    image: 127.0.0.1:${TEST_REGISTRY_PORT}/service-first
+    build:
+      context: service-first-dir/
+
+  service-second:
+    image: 127.0.0.1:${TEST_REGISTRY_PORT}/service-second:version2
+    build:
+      context: service-second-dir/
+      dockerfile: Dockerfile.alt

test/e2e/fixtures/compose-build-basic/service-first-dir/Dockerfile

@@ -0,0 +1,3 @@
+FROM portainer/pause:3.9
+
+ENV SERVICE_NAME=service-first

test/e2e/fixtures/compose-build-basic/service-second-dir/Dockerfile.alt

@@ -0,0 +1,3 @@
+FROM portainer/pause:3.9
+
+ENV SERVICE_NAME=service-second

website/index.html

@@ -3,9 +3,9 @@
 
 <head>
     <meta charset="utf-8">
-    <title>Deploy Docker Apps on Your Infrastructure | Uncloud</title>
+    <title>Self-host and scale web apps without Kubernetes complexity | Uncloud</title>
     <meta name="description"
-          content="Uncloud helps you deploy container applications on your infrastructure — from cloud VMs to bare metal. Replace Heroku and Render, no Kubernetes required.">
+          content="Take your Docker Compose apps to production with zero-downtime deployments, automatic HTTPS, and cross-machine scaling. Self-hosting made reliable without the complexity.">
     <meta name="viewport" content="width=device-width,initial-scale=1">
     <link href="./style.css" rel="stylesheet">
     <link rel="apple-touch-icon" href="./images/apple-touch-icon.png" sizes="180x180"/>
@@ -13,11 +13,12 @@
     <link rel="alternate icon" type="image/png" href="./images/favicon.png" sizes="96x96"/>
 
     <!-- OpenGraph tags for social media -->
-    <meta property="og:title" content="Deploy Docker Apps on Your Infrastructure | Uncloud"/>
+    <meta property="og:title"
+          content="Self-host and scale web apps without Kubernetes complexity | Uncloud"/>
     <meta property="og:description"
-          content="Uncloud helps you deploy container applications on your infrastructure — from cloud VMs to bare metal. Replace Heroku and Render, no Kubernetes required."/>
+          content="Take your Docker Compose apps to production with zero-downtime deployments, automatic HTTPS, and cross-machine scaling. Self-hosting made reliable without the complexity."/>
     <meta property="og:image" content="https://uncloud.run/images/logo-wide.png"/>
-    <meta property="og:image:alt" content="Uncloud logo - Deploy container apps with ease"/>
+    <meta property="og:image:alt" content="Uncloud logo - Self-host web apps with ease"/>
     <meta property="og:url" content="https://uncloud.run"/>
     <meta property="og:type" content="website"/>
     <meta property="og:site_name" content="Uncloud"/>
@@ -25,11 +26,12 @@
     <meta property="twitter:domain" content="uncloud.run">
     <meta property="twitter:url" content="https://uncloud.run">
     <meta name="twitter:card" content="summary_large_image">
-    <meta name="twitter:title" content="Deploy Docker Apps on Your Infrastructure | Uncloud">
+    <meta name="twitter:title"
+          content="Self-host and scale web apps without Kubernetes complexity | Uncloud">
     <meta name="twitter:description"
-          content="Uncloud helps you deploy container applications on your infrastructure — from cloud VMs to bare metal. Replace Heroku and Render, no Kubernetes required.">
+          content="Take your Docker Compose apps to production with zero-downtime deployments, automatic HTTPS, and cross-machine scaling. Self-hosting made reliable without the complexity.">
     <meta name="twitter:image" content="https://uncloud.run/images/logo-wide.png">
-    <meta name="twitter:image:alt" content="Uncloud logo - Deploy container apps with ease">
+    <meta name="twitter:image:alt" content="Uncloud logo - Self-host web apps with ease">
 </head>
 
 <body class="font-inter antialiased bg-white text-zinc-900 tracking-tight">
@@ -54,19 +56,40 @@
                     <ul class="flex grow justify-end flex-wrap items-center">
                         <li>
                             <a class="text-sm font-medium text-zinc-500 hover:text-zinc-900 px-3 lg:px-5 py-2 flex items-center transition"
-                               href="https://github.com/psviderski/uncloud">
+                               href="https://docs.uncloud.run">
-                                <svg class="w-4 h-4 mr-1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"
+                                <svg class="w-4 h-4 mr-1 fill-current hidden sm:inline"
-                                     fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round"
+                                     xmlns="http://www.w3.org/2000/svg"
-                                     stroke-linejoin="round">
+                                     viewBox="0 0 24 24">
-                                    <path d="M15 22v-4a4.8 4.8 0 0 0-1-3.5c3 0 6-2 6-5.5.08-1.25-.27-2.48-1-3.5.28-1.15.28-2.35 0-3.5 0 0-1 0-3 1.5-2.64-.5-5.36-.5-8 0C6 2 5 2 5 2c-.3 1.15-.3 2.35 0 3.5A5.403 5.403 0 0 0 4 9c0 3.5 3 5.5 6 5.5-.39.49-.68 1.05-.85 1.65-.17.6-.22 1.23-.15 1.85v4"/>
+                                    <path d="M14,2H6A2,2 0 0,0 4,4V20A2,2 0 0,0 6,22H18A2,2 0 0,0 20,20V8L14,2M18,20H6V4H13V9H18V20Z"/>
-                                    <path d="M9 18c-4.51 2-5-2-7-2"/>
                                 </svg>
-                                <span class="ml-1 hidden sm:inline">View Source</span>
+                                <span class="ml-1">Docs</span>
+                            </a>
+                        </li>
+                        <li>
+                            <a class="text-sm font-medium text-zinc-500 hover:text-zinc-900 px-3 lg:px-5 py-2 flex items-center transition"
+                               href="https://discord.gg/eR35KQJhPu">
+                                <svg class="w-4 h-4 mr-1 fill-current" xmlns="http://www.w3.org/2000/svg"
+                                     viewBox="0 0 24 24">
+                                    <path d="M20.317 4.3698a19.7913 19.7913 0 00-4.8851-1.5152.0741.0741 0 00-.0785.0371c-.211.3753-.4447.8648-.6083 1.2495-1.8447-.2762-3.68-.2762-5.4868 0-.1636-.3933-.4058-.8742-.6177-1.2495a.077.077 0 00-.0785-.037 19.7363 19.7363 0 00-4.8852 1.515.0699.0699 0 00-.0321.0277C.5334 9.0458-.319 13.5799.0992 18.0578a.0824.0824 0 00.0312.0561c2.0528 1.5076 4.0413 2.4228 5.9929 3.0294a.0777.0777 0 00.0842-.0276c.4616-.6304.8731-1.2952 1.226-1.9942a.076.076 0 00-.0416-.1057c-.6528-.2476-1.2743-.5495-1.8722-.8923a.077.077 0 01-.0076-.1277c.1258-.0943.2517-.1923.3718-.2914a.0743.0743 0 01.0776-.0105c3.9278 1.7933 8.18 1.7933 12.0614 0a.0739.0739 0 01.0785.0095c.1202.099.246.1981.3728.2924a.077.077 0 01-.0066.1276 12.2986 12.2986 0 01-1.873.8914.0766.0766 0 00-.0407.1067c.3604.698.7719 1.3628 1.225 1.9932a.076.076 0 00.0842.0286c1.961-.6067 3.9495-1.5219 6.0023-3.0294a.077.077 0 00.0313-.0552c.5004-5.177-.8382-9.6739-3.5485-13.6604a.061.061 0 00-.0312-.0286zM8.02 15.3312c-1.1825 0-2.1569-1.0857-2.1569-2.419 0-1.3332.9555-2.4189 2.157-2.4189 1.2108 0 2.1757 1.0952 2.1568 2.419 0 1.3332-.9555 2.4189-2.1569 2.4189zm7.9748 0c-1.1825 0-2.1569-1.0857-2.1569-2.419 0-1.3332.9554-2.4189 2.1569-2.4189 1.2108 0 2.1757 1.0952 2.1568 2.419 0 1.3332-.946 2.4189-2.1568 2.4189Z"/>
+                                </svg>
+                                <span class="ml-1 hidden sm:inline">Discord</span>
+                            </a>
+                        </li>
+                        <li>
+                            <a class="text-sm font-medium text-zinc-500 hover:text-zinc-900 px-3 lg:px-5 py-2 flex items-center transition"
+                               href="https://github.com/psviderski/uncloud">
+                                <svg class="w-4 h-4 mr-1 fill-current" xmlns="http://www.w3.org/2000/svg"
+                                     viewBox="0 0 24 24">
+                                    <path d="M12 .297c-6.63 0-12 5.373-12 12 0 5.303 3.438 9.8 8.205 11.385.6.113.82-.258.82-.577 0-.285-.01-1.04-.015-2.04-3.338.724-4.042-1.61-4.042-1.61C4.422 18.07 3.633 17.7 3.633 17.7c-1.087-.744.084-.729.084-.729 1.205.084 1.838 1.236 1.838 1.236 1.07 1.835 2.809 1.305 3.495.998.108-.776.417-1.305.76-1.605-2.665-.3-5.466-1.332-5.466-5.93 0-1.31.465-2.38 1.235-3.22-.135-.303-.54-1.523.105-3.176 0 0 1.005-.322 3.3 1.23.96-.267 1.98-.399 3-.405 1.02.006 2.04.138 3 .405 2.28-1.552 3.285-1.23 3.285-1.23.645 1.653.24 2.873.12 3.176.765.84 1.23 1.91 1.23 3.22 0 4.61-2.805 5.625-5.475 5.92.42.36.81 1.096.81 2.22 0 1.606-.015 2.896-.015 3.286 0 .315.21.69.825.57C20.565 22.092 24 17.592 24 12.297c0-6.627-5.373-12-12-12"/>
+                                </svg>
+                                <span class="ml-1 hidden sm:inline">GitHub</span>
                             </a>
                         </li>
                         <li class="ml-1">
                             <a class="btn-sm text-zinc-100 bg-zinc-900 hover:bg-zinc-800 w-full shadow"
-                               href="https://github.com/psviderski/uncloud/?tab=readme-ov-file#-quick-start">Get Started</a>
+                               href="https://github.com/psviderski/uncloud/?tab=readme-ov-file#-quick-start">
+                                Get Started
+                            </a>
                         </li>
                     </ul>
                 </nav>
@@ -86,18 +109,19 @@
                     <div class="max-w-3xl mx-auto">
                         <div class="text-center pb-12 md:pb-16">
                             <h1 class="font-inter-tight text-4xl md:text-5xl font-bold bg-clip-text text-transparent bg-gradient-to-r from-zinc-500 via-zinc-900 to-zinc-900 pb-4">
-                                Run on your servers<br>
+                                Self-host and scale web apps<br>
-                                Cut cloud costs
+                                without the complexity
                             </h1>
                             <p class="text-lg text-zinc-500 mb-8">
-                                Uncloud is a lightweight Docker clustering tool for running web apps on your own servers
+                                Take your Docker Compose apps to production with zero-downtime deployments, automatic
-                                — from cloud VMs to bare metal.
+                                HTTPS, and cross-machine scaling. No Kubernetes required.
-                                Replace Heroku and Render, no Kubernetes required.
                             </p>
                             <div class="max-w-xs mx-auto sm:max-w-none sm:inline-flex sm:justify-center space-y-4 sm:space-y-0 sm:space-x-4">
                                 <div>
                                     <a class="btn text-zinc-100 bg-zinc-900 hover:bg-zinc-800 w-full shadow"
-                                       href="https://github.com/psviderski/uncloud/?tab=readme-ov-file#-quick-start">Quick Start</a>
+                                       href="https://github.com/psviderski/uncloud/?tab=readme-ov-file#-quick-start">
+                                        Deploy in 2 minutes
+                                    </a>
                                 </div>
                                 <div>
                                     <a class="btn text-zinc-600 bg-white hover:text-zinc-900 w-full shadow flex items-center justify-center"
@@ -117,16 +141,31 @@
                 </div>
 
                 <div class="max-w-3xl mx-auto px-4 sm:px-6 flex justify-center pb-12 relative before:absolute before:-top-12 before:w-96 before:h-96 before:bg-zinc-900 before:opacity-[.15] before:rounded-full before:blur-3xl before:-z-10">
-                    <div class="w-full md:min-h-[420px]">
+                    <div class="coding w-full bg-zinc-800 rounded-lg border border-zinc-700/50 shadow-2xl">
-                        <script src="https://fast.wistia.com/player.js" async></script>
+                        <!-- Title bar -->
-                        <script src="https://fast.wistia.com/embed/k47uwt9uau.js" async type="module"></script>
+                        <div class="pl-4 pt-4 flex items-center">
-                        <style>wistia-player[media-id='k47uwt9uau']:not(:defined) {
+                            <div class="flex gap-2">
-                            background: center / contain no-repeat url('https://fast.wistia.com/embed/medias/k47uwt9uau/swatch');
+                                <div class="w-2.5 h-2.5 rounded-full bg-red-500"></div>
-                            display: block;
+                                <div class="w-2.5 h-2.5 rounded-full bg-yellow-500"></div>
-                            filter: blur(5px);
+                                <div class="w-2.5 h-2.5 rounded-full bg-green-500"></div>
-                            padding-top: 58.33%;
+                            </div>
-                        }</style>
+                        </div>
-                        <wistia-player media-id="k47uwt9uau" aspect="1.7142857142857142"></wistia-player>
+                        <!-- Terminal content -->
+                        <div class="p-4 text-sm sm:p-6 sm:text-[0.9375rem] text-white overflow-x-auto">
+                            <pre class="text-zinc-500 select-none"># Start with any cloud VM or your own server</pre>
+                            <pre><span class="text-emerald-500 select-none">$ </span>uc machine init root@137.123.45.67</pre>
+
+                            <pre> </pre>
+                            <pre class="text-zinc-500 select-none"># Deploy your app with automatic HTTPS</pre>
+                            <pre><span class="text-emerald-500 select-none">$ </span>uc run --name my-app -p app.example.com:8000/https app-image:latest</pre>
+                            <pre class="text-zinc-200">✨ Your app is available at <span class="underline">https://app.example.com</span></pre>
+
+                            <pre> </pre>
+                            <pre class="text-zinc-500 select-none"># Achieve high availability by adding more machines and scaling the app</pre>
+                            <pre><span
+                                    class="text-emerald-500 select-none">$ </span>uc machine add ubuntu@65.21.45.67</pre>
+                            <pre><span class="text-emerald-500 select-none">$ </span>uc scale my-app 2</pre>
+                        </div>
                     </div>
                 </div>
             </div>
@@ -141,7 +180,7 @@
                             Cloud-like experience you control
                         </h2>
                         <p class="text-lg text-zinc-500">
-                            Keep the Docker workflows you love while optimizing infrastructure costs
+                            Keep the Docker Compose workflows you love while deploying anywhere with ease.
                         </p>
                     </div>
 
@@ -362,7 +401,7 @@
                                     </div>
                                 </div>
 
-                                <!-- Fully decentralized -->
+                                <!-- Fully decentralised -->
                                 <div class="text-left flex items-center px-6 py-4 rounded border border-transparent">
                                     <svg class="shrink-0 fill-zinc-400 stroke-zinc-400 mr-3"
                                          xmlns="http://www.w3.org/2000/svg"
@@ -371,11 +410,11 @@
                                     </svg>
                                     <div>
                                         <div class="font-inter-tight text-lg font-semibold text-zinc-200 mb-1">
-                                            Fully decentralized
+                                            Fully decentralised
                                         </div>
                                         <div>
                                             Unlike traditional orchestrators, there's no central control plane to
-                                            maintain. Each machine maintains a synchronized copy of the cluster
+                                            maintain. Each machine maintains a synchronised copy of the cluster
                                             state
                                             through peer-to-peer communication, keeping cluster operations
                                             functional
@@ -502,7 +541,7 @@
                                 <h3 class="font-inter-tight font-semibold text-zinc-200">No vendor lock-in</h3>
                             </div>
                             <p class="text-sm">Mix cloud providers and your own hardware freely to
-                                optimize costs and performance, without changing how you deploy or manage apps.</p>
+                                optimise costs and performance, without changing how you deploy or manage apps.</p>
                         </div>
                     </div>
                 </div>
@@ -510,9 +549,39 @@
             </div>
         </section>
 
+        <!-- Demo Section -->
+        <section class="relative bg-white text-zinc-800">
+            <div class="py-12 md:py-20">
+                <div class="max-w-6xl mx-auto px-4 sm:px-6">
+                    <div class="max-w-3xl mx-auto text-center pb-12 md:pb-16">
+                        <h2 class="font-inter-tight text-3xl md:text-4xl font-bold text-zinc-900 mb-4">
+                            See in action
+                        </h2>
+                        <p class="text-lg text-zinc-500">
+                            Deploy a highly available web app with automatic HTTPS across multiple regions and
+                            on-premises in just a couple minutes.
+                        </p>
+                    </div>
+
+                    <div class="max-w-3xl mx-auto px-4 sm:px-6 flex justify-center pb-12 relative before:absolute before:-top-12 before:w-96 before:h-96 before:bg-zinc-900 before:opacity-[.15] before:rounded-full before:blur-3xl before:-z-10">
+                        <script src="https://fast.wistia.com/player.js" async></script>
+                        <script src="https://fast.wistia.com/embed/k47uwt9uau.js" async type="module"></script>
+                        <style>wistia-player[media-id='k47uwt9uau']:not(:defined) {
+                            background: center / contain no-repeat url('https://fast.wistia.com/embed/medias/k47uwt9uau/swatch');
+                            display: block;
+                            filter: blur(5px);
+                            padding-top: 58.33%;
+                        }</style>
+                        <wistia-player media-id="k47uwt9uau" aspect="1.7142857142857142"
+                                       class="w-full rounded-xl shadow-lg"></wistia-player>
+                    </div>
+                </div>
+            </div>
+        </section>
+
         <!-- CTA -->
         <section id="subscribe">
-            <div class="py-12 md:py-20">
+            <div class="py-12 md:py-20 border-t border-zinc-200">
                 <div class="max-w-6xl mx-auto px-4 sm:px-6">
                     <div class="relative max-w-3xl mx-auto text-center">
                         <h2 class="font-inter-tight text-3xl md:text-4xl font-bold text-zinc-900 mb-4">
@@ -529,7 +598,7 @@
                         <p class="text-lg text-zinc-500 mb-8">
                             Uncloud is an open source project I'm actively developing. I'd love to share this journey
                             with you. Subscribe to follow the progress, get early insights into new features, and be the
-                            first to know when it's ready for production use.
+                            first to know when it's ready for production use. No marketing, ads or spam.
                         <p>
 
                             <!-- Subscribe form -->
@@ -561,9 +630,9 @@
                                 Want to contribute? Check out the
                                 <a href="https://github.com/psviderski/uncloud/issues"
                                    class="text-zinc-900 hover:underline">GitHub issues</a>
-                                or join the
+                                and join the
-                                <a href="https://github.com/psviderski/uncloud/discussions"
+                                <a href="https://discord.gg/eR35KQJhPu"
-                                   class="text-zinc-900 hover:underline">GitHub Discussions</a>.
+                                   class="text-zinc-900 hover:underline">Discord server</a>.
                             </p>
                         </div>
                     </div>
@@ -576,10 +645,104 @@
     <!-- Site footer -->
     <footer>
         <div class="max-w-6xl mx-auto px-4 sm:px-6">
-            <div class="flex justify-center py-8 md:py-12 border-t border-zinc-200">
+            <!-- Top area: Blocks -->
-                <div class="text-sm text-zinc-500">
+            <div class="grid sm:grid-cols-12 gap-8 py-8 md:py-12 border-t border-zinc-200">
-                    Made with ❤️ by
+                <!-- 1st block - Brand -->
-                    <a class="underline hover:text-zinc-900" href="https://github.com/psviderski">Pasha Sviderski</a>
+                <div class="sm:col-span-6 md:col-span-6 lg:col-span-8 max-md:order-1 flex flex-col">
+                    <div class="mb-4">
+                        <!-- Logo -->
+                        <a class="flex items-center" href="index.html">
+                            <img class="w-8 h-8 rounded shadow-sm shadow-zinc-950/20" src="./images/logo.svg"
+                                 alt="Logo">
+                            <span class="ml-2 font-semibold text-lg text-zinc-900">uncloud</span>
+                        </a>
+                    </div>
+                    <div class="grow text-sm text-zinc-500">
+                        Made with ❤️ by
+                        <a class="underline hover:text-zinc-900" href="https://github.com/psviderski">
+                            Pasha Sviderski
+                        </a>
+                        in Australia
+                    </div>
+
+                    <!-- Social links -->
+                    <ul class="flex space-x-4 mt-4 mb-1">
+                        <li>
+                            <a class="flex justify-center items-center text-zinc-700 hover:text-zinc-900 transition"
+                               href="https://discord.gg/eR35KQJhPu" aria-label="Discord">
+                                <svg class="fill-current" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"
+                                     width="20"
+                                     height="20">
+                                    <path d="M20.317 4.3698a19.7913 19.7913 0 00-4.8851-1.5152.0741.0741 0 00-.0785.0371c-.211.3753-.4447.8648-.6083 1.2495-1.8447-.2762-3.68-.2762-5.4868 0-.1636-.3933-.4058-.8742-.6177-1.2495a.077.077 0 00-.0785-.037 19.7363 19.7363 0 00-4.8852 1.515.0699.0699 0 00-.0321.0277C.5334 9.0458-.319 13.5799.0992 18.0578a.0824.0824 0 00.0312.0561c2.0528 1.5076 4.0413 2.4228 5.9929 3.0294a.0777.0777 0 00.0842-.0276c.4616-.6304.8731-1.2952 1.226-1.9942a.076.076 0 00-.0416-.1057c-.6528-.2476-1.2743-.5495-1.8722-.8923a.077.077 0 01-.0076-.1277c.1258-.0943.2517-.1923.3718-.2914a.0743.0743 0 01.0776-.0105c3.9278 1.7933 8.18 1.7933 12.0614 0a.0739.0739 0 01.0785.0095c.1202.099.246.1981.3728.2924a.077.077 0 01-.0066.1276 12.2986 12.2986 0 01-1.873.8914.0766.0766 0 00-.0407.1067c.3604.698.7719 1.3628 1.225 1.9932a.076.076 0 00.0842.0286c1.961-.6067 3.9495-1.5219 6.0023-3.0294a.077.077 0 00.0313-.0552c.5004-5.177-.8382-9.6739-3.5485-13.6604a.061.061 0 00-.0312-.0286zM8.02 15.3312c-1.1825 0-2.1569-1.0857-2.1569-2.419 0-1.3332.9555-2.4189 2.157-2.4189 1.2108 0 2.1757 1.0952 2.1568 2.419 0 1.3332-.9555 2.4189-2.1569 2.4189zm7.9748 0c-1.1825 0-2.1569-1.0857-2.1569-2.419 0-1.3332.9554-2.4189 2.1569-2.4189 1.2108 0 2.1757 1.0952 2.1568 2.419 0 1.3332-.946 2.4189-2.1568 2.4189Z"/>
+                                </svg>
+                            </a>
+                        </li>
+                        <li>
+                            <a class="flex justify-center items-center text-zinc-700 hover:text-zinc-900 transition"
+                               href="https://x.com/psviderski" aria-label="X/Twitter">
+                                <svg class="fill-current" xmlns="http://www.w3.org/2000/svg" width="20" height="20">
+                                    <path d="m7.063 3 3.495 4.475L14.601 3h2.454l-5.359 5.931L18 17h-4.938l-3.866-4.893L4.771 17H2.316l5.735-6.342L2 3h5.063Zm-.74 1.347H4.866l8.875 11.232h1.36L6.323 4.347Z"/>
+                                </svg>
+                            </a>
+                        </li>
+                        <li>
+                            <a class="flex justify-center items-center text-zinc-700 hover:text-zinc-900 transition"
+                               href="https://t.me/spyyy" aria-label="Telegram">
+                                <svg class="fill-current" xmlns="http://www.w3.org/2000/svg" width="20" height="20">
+                                    <path d="M17.968 3.276a.338.338 0 0 0-.232-.253 1.192 1.192 0 0 0-.63.045S3.087 8.106 2.286 8.664c-.172.121-.23.19-.259.272-.138.4.293.573.293.573l3.613 1.177a.388.388 0 0 0 .183-.011c.822-.519 8.27-5.222 8.7-5.38.068-.02.118 0 .1.049-.172.6-6.606 6.319-6.64 6.354a.138.138 0 0 0-.05.118l-.337 3.528s-.142 1.1.956 0a30.66 30.66 0 0 1 1.9-1.738c1.242.858 2.58 1.806 3.156 2.3a1 1 0 0 0 .732.283.825.825 0 0 0 .7-.622S17.894 5.292 17.98 3.909c.008-.135.021-.217.021-.317a1.177 1.177 0 0 0-.032-.316Z"/>
+                                </svg>
+                            </a>
+                        </li>
+                        <li>
+                            <a class="flex justify-center items-center text-zinc-700 hover:text-zinc-900 transition"
+                               href="https://github.com/psviderski/uncloud" aria-label="GitHub">
+                                <svg class="fill-current" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"
+                                     width="20"
+                                     height="20">
+                                    <path d="M12 .297c-6.63 0-12 5.373-12 12 0 5.303 3.438 9.8 8.205 11.385.6.113.82-.258.82-.577 0-.285-.01-1.04-.015-2.04-3.338.724-4.042-1.61-4.042-1.61C4.422 18.07 3.633 17.7 3.633 17.7c-1.087-.744.084-.729.084-.729 1.205.084 1.838 1.236 1.838 1.236 1.07 1.835 2.809 1.305 3.495.998.108-.776.417-1.305.76-1.605-2.665-.3-5.466-1.332-5.466-5.93 0-1.31.465-2.38 1.235-3.22-.135-.303-.54-1.523.105-3.176 0 0 1.005-.322 3.3 1.23.96-.267 1.98-.399 3-.405 1.02.006 2.04.138 3 .405 2.28-1.552 3.285-1.23 3.285-1.23.645 1.653.24 2.873.12 3.176.765.84 1.23 1.91 1.23 3.22 0 4.61-2.805 5.625-5.475 5.92.42.36.81 1.096.81 2.22 0 1.606-.015 2.896-.015 3.286 0 .315.21.69.825.57C20.565 22.092 24 17.592 24 12.297c0-6.627-5.373-12-12-12"/>
+                                </svg>
+                            </a>
+                        </li>
+                    </ul>
+                </div>
+
+                <!-- 2nd block - Documentation -->
+                <div class="sm:col-span-6 md:col-span-3 lg:col-span-2">
+
+                    <h6 class="text-sm text-zinc-800 font-medium mb-2">Documentation</h6>
+                    <ul class="text-sm space-y-2">
+                        <li>
+                            <a class="text-zinc-500 hover:text-zinc-900 transition"
+                               href="https://docs.uncloud.run/#use-cases">Use cases</a>
+                        </li>
+                        <li>
+                            <a class="text-zinc-500 hover:text-zinc-900 transition"
+                               href="https://docs.uncloud.run/getting-started/quick-start">Quick start</a>
+                        </li>
+                    </ul>
+                </div>
+
+                <!-- 3rd block - Resources -->
+                <div class="sm:col-span-6 md:col-span-3 lg:col-span-2">
+                    <h6 class="text-sm text-zinc-800 font-medium mb-2">Resources</h6>
+                    <ul class="text-sm space-y-2">
+                        <li>
+                            <a class="text-zinc-500 hover:text-zinc-900 transition"
+                               href="https://github.com/psviderski/uncloud">GitHub project</a>
+                        </li>
+                        <li>
+                            <a class="text-zinc-500 hover:text-zinc-900 transition"
+                               href="https://github.com/psviderski/uncloud/releases">Releases</a>
+                        </li>
+                        <li>
+                            <a class="text-zinc-500 hover:text-zinc-900 transition"
+                               href="https://github.com/psviderski/uncloud/blob/main/LICENSE">License</a>
+                        </li>
+                        <li>
+                            <a class="text-zinc-500 hover:text-zinc-900 transition"
+                               href="https://discord.gg/eR35KQJhPu">Community</a>
+                        </li>
+                    </ul>
                 </div>
             </div>
         </div>

website/style.css

@@ -1222,6 +1222,10 @@ input[type="search"]::-webkit-search-results-decoration {
   margin-bottom: 0.25rem;
 }
 
+.mb-2{
+  margin-bottom: 0.5rem;
+}
+
 .mb-4{
   margin-bottom: 1rem;
 }
@@ -1314,6 +1318,14 @@ input[type="search"]::-webkit-search-results-decoration {
   height: 3.5rem;
 }
 
+.h-2{
+  height: 0.5rem;
+}
+
+.h-2\.5{
+  height: 0.625rem;
+}
+
 .h-24{
   height: 6rem;
 }
@@ -1334,6 +1346,14 @@ input[type="search"]::-webkit-search-results-decoration {
   min-height: 100vh;
 }
 
+.w-2{
+  width: 0.5rem;
+}
+
+.w-2\.5{
+  width: 0.625rem;
+}
+
 .w-4{
   width: 1rem;
 }
@@ -1402,6 +1422,12 @@ input[type="search"]::-webkit-search-results-decoration {
   transform: translate(var(--tw-translate-x), var(--tw-translate-y)) rotate(var(--tw-rotate)) skewX(var(--tw-skew-x)) skewY(var(--tw-skew-y)) scaleX(var(--tw-scale-x)) scaleY(var(--tw-scale-y));
 }
 
+.select-none{
+  -webkit-user-select: none;
+     -moz-user-select: none;
+          user-select: none;
+}
+
 .grid-cols-1{
   grid-template-columns: repeat(1, minmax(0, 1fr));
 }
@@ -1446,6 +1472,10 @@ input[type="search"]::-webkit-search-results-decoration {
   justify-content: space-between;
 }
 
+.gap-2{
+  gap: 0.5rem;
+}
+
 .gap-3{
   gap: 0.75rem;
 }
@@ -1508,6 +1538,10 @@ input[type="search"]::-webkit-search-results-decoration {
   overflow: hidden;
 }
 
+.overflow-x-auto{
+  overflow-x: auto;
+}
+
 .rounded{
   border-radius: 0.25rem;
 }
@@ -1586,6 +1620,10 @@ input[type="search"]::-webkit-search-results-decoration {
   border-color: rgb(228 228 231 / var(--tw-border-opacity));
 }
 
+.border-zinc-700\/50{
+  border-color: rgb(63 63 70 / 0.5);
+}
+
 .bg-gray-100{
   --tw-bg-opacity: 1;
   background-color: rgb(243 244 246 / var(--tw-bg-opacity));
@@ -1596,11 +1634,26 @@ input[type="search"]::-webkit-search-results-decoration {
   background-color: rgb(229 231 235 / var(--tw-bg-opacity));
 }
 
+.bg-green-500{
+  --tw-bg-opacity: 1;
+  background-color: rgb(34 197 94 / var(--tw-bg-opacity));
+}
+
+.bg-red-500{
+  --tw-bg-opacity: 1;
+  background-color: rgb(239 68 68 / var(--tw-bg-opacity));
+}
+
 .bg-white{
   --tw-bg-opacity: 1;
   background-color: rgb(255 255 255 / var(--tw-bg-opacity));
 }
 
+.bg-yellow-500{
+  --tw-bg-opacity: 1;
+  background-color: rgb(234 179 8 / var(--tw-bg-opacity));
+}
+
 .bg-zinc-50{
   --tw-bg-opacity: 1;
   background-color: rgb(250 250 250 / var(--tw-bg-opacity));
@@ -1640,6 +1693,10 @@ input[type="search"]::-webkit-search-results-decoration {
           background-clip: text;
 }
 
+.fill-current{
+  fill: currentColor;
+}
+
 .fill-zinc-300{
   fill: #d4d4d8;
 }
@@ -1652,6 +1709,10 @@ input[type="search"]::-webkit-search-results-decoration {
   stroke: #a1a1aa;
 }
 
+.p-4{
+  padding: 1rem;
+}
+
 .p-5{
   padding: 1.25rem;
 }
@@ -1719,10 +1780,18 @@ input[type="search"]::-webkit-search-results-decoration {
   padding-bottom: 1rem;
 }
 
+.pl-4{
+  padding-left: 1rem;
+}
+
 .pt-32{
   padding-top: 8rem;
 }
 
+.pt-4{
+  padding-top: 1rem;
+}
+
 .pt-6{
   padding-top: 1.5rem;
 }
@@ -1836,6 +1905,11 @@ input[type="search"]::-webkit-search-results-decoration {
   color: transparent;
 }
 
+.text-white{
+  --tw-text-opacity: 1;
+  color: rgb(255 255 255 / var(--tw-text-opacity));
+}
+
 .text-zinc-100{
   --tw-text-opacity: 1;
   color: rgb(244 244 245 / var(--tw-text-opacity));
@@ -1861,6 +1935,16 @@ input[type="search"]::-webkit-search-results-decoration {
   color: rgb(82 82 91 / var(--tw-text-opacity));
 }
 
+.text-zinc-700{
+  --tw-text-opacity: 1;
+  color: rgb(63 63 70 / var(--tw-text-opacity));
+}
+
+.text-zinc-800{
+  --tw-text-opacity: 1;
+  color: rgb(39 39 42 / var(--tw-text-opacity));
+}
+
 .text-zinc-900{
   --tw-text-opacity: 1;
   color: rgb(24 24 27 / var(--tw-text-opacity));
@@ -1887,6 +1971,12 @@ input[type="search"]::-webkit-search-results-decoration {
   box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow);
 }
 
+.shadow-lg{
+  --tw-shadow: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
+  --tw-shadow-colored: 0 10px 15px -3px var(--tw-shadow-color), 0 4px 6px -4px var(--tw-shadow-color);
+  box-shadow: var(--tw-ring-offset-shadow, 0 0 #0000), var(--tw-ring-shadow, 0 0 #0000), var(--tw-shadow);
+}
+
 .shadow-sm{
   --tw-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
   --tw-shadow-colored: 0 1px 2px 0 var(--tw-shadow-color);
@@ -2156,7 +2246,17 @@ input[type="search"]::-webkit-search-results-decoration {
   }
 }
 
+@media not all and (min-width: 768px){
+  .max-md\:order-1{
+    order: 1;
+  }
+}
+
 @media (min-width: 640px){
+  .sm\:col-span-6{
+    grid-column: span 6 / span 6;
+  }
+
   .sm\:inline{
     display: inline;
   }
@@ -2169,6 +2269,10 @@ input[type="search"]::-webkit-search-results-decoration {
     max-width: none;
   }
 
+  .sm\:grid-cols-12{
+    grid-template-columns: repeat(12, minmax(0, 1fr));
+  }
+
   .sm\:grid-cols-2{
     grid-template-columns: repeat(2, minmax(0, 1fr));
   }
@@ -2197,10 +2301,18 @@ input[type="search"]::-webkit-search-results-decoration {
     margin-bottom: calc(0px * var(--tw-space-y-reverse));
   }
 
+  .sm\:p-6{
+    padding: 1.5rem;
+  }
+
   .sm\:px-6{
     padding-left: 1.5rem;
     padding-right: 1.5rem;
   }
+
+  .sm\:text-\[0\.9375rem\]{
+    font-size: 0.9375rem;
+  }
 }
 
 @media (min-width: 768px){
@@ -2208,12 +2320,16 @@ input[type="search"]::-webkit-search-results-decoration {
     top: 1.5rem;
   }
 
-  .md\:mb-0{
+  .md\:col-span-3{
-    margin-bottom: 0px;
+    grid-column: span 3 / span 3;
   }
 
-  .md\:min-h-\[420px\]{
+  .md\:col-span-6{
-    min-height: 420px;
+    grid-column: span 6 / span 6;
+  }
+
+  .md\:mb-0{
+    margin-bottom: 0px;
   }
 
   .md\:max-w-4xl{
@@ -2264,6 +2380,14 @@ input[type="search"]::-webkit-search-results-decoration {
 }
 
 @media (min-width: 1024px){
+  .lg\:col-span-2{
+    grid-column: span 2 / span 2;
+  }
+
+  .lg\:col-span-8{
+    grid-column: span 8 / span 8;
+  }
+
   .lg\:mt-24{
     margin-top: 6rem;
   }