docs(install): mise installation (#421)

* feat: support stdin_open and tty

This can be useful to leave a container running without specifying a
command like `sleep`, and probably in other situations as well.

Signed-off-by: Miek Gieben <miek@miek.nl>

* Complete full spec test case

Signed-off-by: Miek Gieben <miek@miek.nl>

* fix container log streaming for containers with TTY

---------

Signed-off-by: Miek Gieben <miek@miek.nl>
Co-authored-by: Pasha Sviderski <me@psviderski.name>

.github/workflows/nightly-build.yml

@@ -57,7 +57,8 @@ jobs:
 
           The commands below show how to install the nightly version of uncloud.
 
-          > **Warning**: These are nightly development builds and may be unstable.
+          > [!WARNING]
+          > These are nightly development builds and may be unstable.
 
           **Install uncloud CLI:**
 

.goreleaser.yaml

@@ -20,9 +20,9 @@ snapshot:
   version_template: "{{ incminor .Version }}-nightly-{{.ShortCommit}}"
 
 builds:
-  - id: uncloud
-    main: ./cmd/uncloud
-    binary: uncloud
+  - id: uc
+    main: ./cmd/uc
+    binary: uc
     env:
       # Use CGO to be able to build fsevent required by compose on macOS.
       - CGO_ENABLED={{ if eq .Os "darwin" }}1{{ else }}0{{ end }}
@@ -34,7 +34,12 @@ builds:
       - amd64
       - arm64
     ldflags:
-      - -s -w -X github.com/psviderski/uncloud/internal/version.version={{ .Version }}
+      - -s -w
+        -X github.com/psviderski/uncloud/internal/version.version={{.Version}}
+        -X github.com/psviderski/uncloud/internal/version.commit={{.Commit}}
+        -X github.com/psviderski/uncloud/internal/version.dirty={{.IsGitDirty}}
+        -X github.com/psviderski/uncloud/internal/version.date={{.CommitDate}}
+        -X github.com/psviderski/uncloud/internal/version.builtBy=goreleaser
 
   - id: uncloudd
     main: ./cmd/uncloudd
@@ -47,12 +52,17 @@ builds:
       - amd64
       - arm64
     ldflags:
-      - -s -w -X github.com/psviderski/uncloud/internal/version.version={{ .Version }}
+      - -s -w
+        -X github.com/psviderski/uncloud/internal/version.version={{.Version}}
+        -X github.com/psviderski/uncloud/internal/version.commit={{.Commit}}
+        -X github.com/psviderski/uncloud/internal/version.dirty={{.IsGitDirty}}
+        -X github.com/psviderski/uncloud/internal/version.date={{.CommitDate}}
+        -X github.com/psviderski/uncloud/internal/version.builtBy=goreleaser
 
 archives:
-  - id: uncloud
+  - id: uc
     builds:
-      - uncloud
+      - uc
     formats:
       # gz is not compatible with homebrew releases, so we use tar.gz
       - tar.gz
@@ -93,10 +103,9 @@ brews:
     description: "Uncloud CLI"
     homepage: "https://uncloud.run"
     ids:
-      - uncloud
+      - uc
     install: |
-      bin.install "uncloud"
-      bin.install_symlink "uncloud" => "uc"
+      bin.install "uc"
     skip_upload: false
     repository:
       owner: psviderski

AGENTS.md

@@ -72,7 +72,7 @@ management.
 
 - **`cmd/`**: Contains main applications
 
-    - `uncloud/`: CLI tool with subcommands for machine, service, volume management
+    - `uc/`: CLI tool with subcommands for machine, service, volume management
     - `uncloudd/`: Daemon that runs on each machine
     - `ucind/`: Development cluster management for testing
 
@@ -131,7 +131,7 @@ github.com/siderolabs/grpc-proxy // gRPC proxy for forwarding
 
 ```bash
 # Build binaries
-go build -o uncloud ./cmd/uncloud
+go build -o uc ./cmd/uc
 go build -o uncloudd ./cmd/uncloudd
 ```
 
@@ -239,7 +239,7 @@ uc context use <name>           # Switch context
 
 ### Important Files to Understand
 
-- `cmd/uncloud/main.go`: CLI entry point and command structure
+- `cmd/uc/main.go`: CLI entry point and command structure
 - `internal/cli/cli.go`: CLI implementation and configuration
 - `internal/machine/machine.go`: Core machine management
 - `pkg/api/`: Public API definitions

Dockerfile

@@ -18,6 +18,7 @@ RUN GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o uncloudd ./cmd/uncloudd
 
 FROM alpine:${ALPINE_VERSION} AS corrosion-download
 ARG TARGETARCH
+ARG CORROSION_VERSION
 
 RUN CORROSION_ARCH=$(case "${TARGETARCH}" in \
       "amd64") echo "x86_64" ;; \
@@ -25,20 +26,21 @@ RUN CORROSION_ARCH=$(case "${TARGETARCH}" in \
       *) 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" \
+      "https://github.com/psviderski/corrosion/releases/download/v${CORROSION_VERSION}/corrosion-${CORROSION_ARCH}-unknown-linux-gnu.tar.gz" \
     && tar -xzf /tmp/corrosion.tar.gz -C /tmp \
-    && install /tmp/corrosion /usr/local/bin/corrosion \
+    && install /tmp/corrosion /usr/bin/corrosion \
     && rm /tmp/corrosion.tar.gz /tmp/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
+FROM gcr.io/distroless/cc-debian13:latest AS corrosion
+COPY --from=corrosion-download /usr/bin/corrosion /usr/bin/corrosion
 CMD ["corrosion", "agent"]
 
 
 FROM alpine:${ALPINE_VERSION} AS corrosion-image-tarball
-ARG CORROSION_IMAGE="ghcr.io/psviderski/corrosion:latest"
+ARG CORROSION_VERSION
+ARG CORROSION_IMAGE="ghcr.io/unlabs-dev/corrosion:${CORROSION_VERSION}"
 ARG TARGETOS
 ARG TARGETARCH
 
@@ -47,6 +49,8 @@ RUN crane pull --platform ${TARGETOS}/${TARGETARCH} "${CORROSION_IMAGE}" /corros
 
 # Uncloud-in-Docker (ucind) image for running Uncloud test clusters using Docker.
 FROM docker:29.4.0-dind AS ucind
+ARG CORROSION_VERSION
+
 # Create system group and user 'uncloud'.
 RUN addgroup -S uncloud && adduser -SHD -h /nonexistent -G uncloud -g "" uncloud
 RUN apk --no-cache add \

HACKING.md

@@ -32,13 +32,13 @@ available outside the project, so they don't interfere with system packages.
 Build the CLI:
 
 ```shell
-go build -o uc ./cmd/uncloud
+go build -o uc ./cmd/uc
 ```
 
 Or build and run the CLI with a single command:
 
 ```shell
-go run ./cmd/uncloud --help
+go run ./cmd/uc --help
 ```
 
 The Uncloud daemon (`uncloudd`) only supports Linux, so you need to cross-compile it if you're developing on macOS or

Makefile

@@ -1,6 +1,7 @@
 # TODO: Makefile is deprecated, add new targets as mise tasks in mise.toml instead.
 
-CORROSION_IMAGE ?= ghcr.io/psviderski/corrosion:latest
+CORROSION_VERSION ?= 2026.6.15
+CORROSION_IMAGE = ghcr.io/unlabs-dev/corrosion:$(CORROSION_VERSION)
 UCIND_IMAGE ?= ghcr.io/psviderski/ucind:latest
 
 .PHONY: ucind-cluster
@@ -9,11 +10,12 @@ ucind-cluster:
 
 .PHONY: corrosion-image
 corrosion-image:
-	docker build -t "$(CORROSION_IMAGE)" --target corrosion .
+	docker build --build-arg CORROSION_VERSION=$(CORROSION_VERSION) -t "$(CORROSION_IMAGE)" --target corrosion .
 
 .PHONY: corrosion-multiarch-image-push
 corrosion-multiarch-image-push:
-	docker buildx build --push --platform linux/amd64,linux/arm64 -t "$(CORROSION_IMAGE)" --target corrosion .
+	docker buildx build --build-arg CORROSION_VERSION=$(CORROSION_VERSION) --push --platform linux/amd64,linux/arm64 \
+		-t "$(CORROSION_IMAGE)" --target corrosion .
 
 .PHONY: ucind-multiarch-image-push
 ucind-multiarch-image-push:
@@ -70,4 +72,4 @@ _lint:
 
 .PHONY: cli-docs
 cli-docs:
-	go run ./cmd/uncloud docs
+	go run ./cmd/uc docs

README.md

@@ -154,7 +154,6 @@ Here is a diagram of an Uncloud multi-provider cluster of 3 machines:
 ```bash
 $ uc machine init --name oracle-vm ubuntu@152.67.101.197
 
-Downloading Uncloud install script: https://raw.githubusercontent.com/psviderski/uncloud/refs/heads/main/scripts/install.sh
 ⏳ Running Uncloud install script...
 ✓ Docker is already installed.
 ⏳ Installing Docker...
@@ -169,9 +168,6 @@ Downloading Uncloud install script: https://raw.githubusercontent.com/psviderski
 ✓ 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-aarch64-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! 🎉
@@ -190,21 +186,20 @@ DNS records updated to use only the internet-reachable machines running caddy se
   *.xuw3xd.cluster.uncloud.run  A → 152.67.101.197
 ```
 
-1. The CLI SSHs into the machine and installs Docker, the `uncloudd` machine daemon and
-   [corrosion](https://github.com/superfly/corrosion) service, managed by systemd.
+1. The CLI SSHs into the machine and installs Docker and the `uncloudd` machine daemon, managed by systemd.
 2. Generates a unique WireGuard key pair, allocates a dedicated subnet `10.210.0.0/24` for the machine and its
    containers, and configures `uncloudd` accordingly. All subsequent communication happens with `uncloudd`
    through its gRPC API over SSH.
-3. Configures and starts `corrosion`, a CRDT-based distributed SQLite database to share cluster state between machines.
+3. Configures and starts [corrosion](https://github.com/superfly/corrosion), a CRDT-based distributed SQLite database to
+   share cluster state between machines, as a Docker container managed by `uncloudd`.
 4. Creates a Docker bridge network connected to the WireGuard interface.
-5. This machine becomes an entry point for the newly created cluster which is stored in the cluster config under
-   `~/.config/uncloud` on your local machine.
+5. This machine becomes an entry point for the newly created cluster. Its address is stored as a connection info in the
+   cluster config at `~/.config/uncloud/config.yaml` on your local machine.
 
 **When you add another machine:**
 
 ```bash
 $ uc machine add --name hetzner-server root@5.223.45.199
-Downloading Uncloud install script: https://raw.githubusercontent.com/psviderski/uncloud/refs/heads/main/scripts/install.sh
 ⏳ Running Uncloud install script...
 ✓ Docker is already installed.
 ✓ Linux user and group 'uncloud' created.
@@ -215,9 +210,6 @@ Downloading Uncloud install script: https://raw.githubusercontent.com/psviderski
 ✓ 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! 🎉
@@ -246,9 +238,10 @@ hetzner-server   Up      10.210.1.1/24   5.223.45.199     5.223.45.199:51820, [2
 3. Registers the second machine in the cluster state and exchanges WireGuard keys with the first machine.
 4. Both machines establish a WireGuard tunnel between each other, allowing Docker containers connected to the bridge
    network to communicate directly across machines.
-5. Configures and starts `corrosion` on the second machine to sync the cluster state.
+5. Configures and starts the `uncloud-corrosion` container on the second machine to sync the cluster state.
 6. The second machine is added as an alternative entry point in the cluster config.
-7. If one of the machines goes offline, the other machine can still serve cluster operations.
+7. If one of the machines goes offline, the other machine can still be used by `uc` to connect and run cluster
+   operations.
 
 If one more machine is added, the process repeats with a new subnet. The new machine needs to establish a WireGuard
 connection with only one of the existing machines. Other machines will learn about it through the shared cluster state

cmd/uc/art.txt

@@ -0,0 +1,4 @@
+ _   _  ___
+| | | |/ __|
+| |_| | (__
+ \__,_|\___|

cmd/uc/build.go

@@ -6,6 +6,7 @@ import (
 
 	composecli "github.com/compose-spec/compose-go/v2/cli"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/pkg/client/compose"
 	"github.com/spf13/cobra"
 )
@@ -50,6 +51,9 @@ to cluster machines or --push-registry to upload them to external registries.`,
 			return runBuild(cmd.Context(), uncli, opts)
 		},
 		GroupID: "service",
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			return completion.ComposeServices(cmd.Context(), args, toComplete, opts.files, opts.profiles)
+		},
 	}
 
 	cmd.Flags().StringArrayVar(&opts.BuildArgs, "build-arg", nil,
@@ -76,6 +80,8 @@ to cluster machines or --push-registry to upload them to external registries.`,
 	cmd.Flags().BoolVar(&opts.PushRegistry, "push-registry", false,
 		"Upload the built images to external registries (e.g., Docker Hub) after building.")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uc/caddy/config.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/alecthomas/chroma/v2/quick"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/spf13/cobra"
 )
 
@@ -33,6 +34,8 @@ func NewConfigCommand() *cobra.Command {
 	cmd.Flags().BoolVar(&opts.noColor, "no-color", false,
 		"Disable syntax highlighting for the output.")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 
@@ -45,10 +48,7 @@ func runConfig(ctx context.Context, uncli *cli.CLI, opts configOptions) error {
 
 	if opts.machine != "" {
 		// If a specific machine is requested, use it to get the Caddy configuration.
-		ctx, _, err = clusterClient.ProxyMachinesContext(ctx, []string{opts.machine})
-		if err != nil {
-			return err
-		}
+		ctx = clusterClient.ProxySingleMachineContext(ctx, opts.machine)
 	}
 
 	config, err := clusterClient.Caddy.GetConfig(ctx, nil)

cmd/uc/caddy/deploy.go

@@ -13,6 +13,7 @@ import (
 	"github.com/docker/cli/cli/streams"
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 	"github.com/psviderski/uncloud/pkg/api"
@@ -48,6 +49,8 @@ func NewDeployCommand() *cobra.Command {
 		"Machine names or IDs to deploy to. Can be specified multiple times or as a comma-separated "+
 			"list. (default is all machines)")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 
@@ -172,8 +175,7 @@ func runDeploy(ctx context.Context, uncli *cli.CLI, opts deployOptions) error {
 			return fmt.Errorf("confirm deployment: %w", err)
 		}
 		if !confirmed {
-			fmt.Println("Cancelled. No changes were made.")
-			return nil
+			return cli.Cancelled("Caddy deploy cancelled. No changes were made.")
 		}
 
 		err = progress.RunWithTitle(ctx, func(ctx context.Context) error {

cmd/uc/caddy/logs.go

@@ -0,0 +1,29 @@
+package caddy
+
+import (
+	"github.com/psviderski/uncloud/cmd/uc/service"
+	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/logs"
+	"github.com/spf13/cobra"
+)
+
+func NewLogsCommand() *cobra.Command {
+	var options logs.Options
+
+	cmd := &cobra.Command{
+		Use:     "logs",
+		Aliases: []string{"log"},
+		Short:   "View caddy logs.",
+		Long: `View caddy logs.
+
+This calls "uc logs caddy", see "uc logs" for the documention.
+`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			args = append([]string{"caddy"}, args...)
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return service.RunLogs(cmd.Context(), uncli, args, options)
+		},
+	}
+	cmd.Flags().AddFlagSet(logs.Flags(&options))
+	return cmd
+}

cmd/uc/caddy/root.go

@@ -12,6 +12,7 @@ func NewRootCommand() *cobra.Command {
 	cmd.AddCommand(
 		NewConfigCommand(),
 		NewDeployCommand(),
+		NewLogsCommand(),
 	)
 	return cmd
 }

cmd/uc/context/args_test.go

@@ -0,0 +1,103 @@
+package context
+
+import (
+	"testing"
+
+	"github.com/spf13/cobra"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCommandArgsValidation(t *testing.T) {
+	t.Parallel()
+
+	tests := []struct {
+		name    string
+		newCmd  func() *cobra.Command
+		args    []string
+		wantErr bool
+	}{
+		{
+			name:    "root accepts no args",
+			newCmd:  NewRootCommand,
+			args:    nil,
+			wantErr: false,
+		},
+		{
+			name:    "root rejects extra args",
+			newCmd:  NewRootCommand,
+			args:    []string{"extra"},
+			wantErr: true,
+		},
+		{
+			name:    "list accepts no args",
+			newCmd:  NewListCommand,
+			args:    nil,
+			wantErr: false,
+		},
+		{
+			name:    "list rejects extra args",
+			newCmd:  NewListCommand,
+			args:    []string{"extra"},
+			wantErr: true,
+		},
+		{
+			name:    "show accepts no args",
+			newCmd:  NewShowCommand,
+			args:    nil,
+			wantErr: false,
+		},
+		{
+			name:    "show rejects extra args",
+			newCmd:  NewShowCommand,
+			args:    []string{"extra"},
+			wantErr: true,
+		},
+		{
+			name:    "connection accepts no args",
+			newCmd:  NewConnectionCommand,
+			args:    nil,
+			wantErr: false,
+		},
+		{
+			name:    "connection rejects extra args",
+			newCmd:  NewConnectionCommand,
+			args:    []string{"extra"},
+			wantErr: true,
+		},
+		{
+			name:    "use accepts no args",
+			newCmd:  NewUseCommand,
+			args:    nil,
+			wantErr: false,
+		},
+		{
+			name:    "use accepts one arg",
+			newCmd:  NewUseCommand,
+			args:    []string{"prod"},
+			wantErr: false,
+		},
+		{
+			name:    "use rejects extra args",
+			newCmd:  NewUseCommand,
+			args:    []string{"prod", "extra"},
+			wantErr: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+
+			cmd := tt.newCmd()
+			require.NotNil(t, cmd.Args)
+
+			err := cmd.Args(cmd, tt.args)
+			if tt.wantErr {
+				require.Error(t, err)
+				return
+			}
+
+			require.NoError(t, err)
+		})
+	}
+}

cmd/uc/context/connection.go

@@ -14,6 +14,7 @@ func NewConnectionCommand() *cobra.Command {
 		Use:     "connection",
 		Aliases: []string{"conn"},
 		Short:   "Choose a new default connection for the current context.",
+		Args:    cobra.NoArgs,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 			return selectConnection(uncli)

cmd/uc/context/ls.go

@@ -5,6 +5,7 @@ import (
 	"maps"
 	"slices"
 
+	"charm.land/lipgloss/v2"
 	"github.com/psviderski/uncloud/internal/cli"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/spf13/cobra"
@@ -15,6 +16,7 @@ func NewListCommand() *cobra.Command {
 		Use:     "ls",
 		Aliases: []string{"list"},
 		Short:   "List available cluster contexts.",
+		Args:    cobra.NoArgs,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 			return list(uncli)
@@ -49,6 +51,6 @@ func list(uncli *cli.CLI) error {
 		t.Row(name, current, fmt.Sprintf("%d", connCount))
 	}
 
-	fmt.Println(t)
+	lipgloss.Println(t)
 	return nil
 }

cmd/uc/context/root.go

@@ -10,6 +10,7 @@ func NewRootCommand() *cobra.Command {
 		Use:     "ctx",
 		Aliases: []string{"context"},
 		Short:   "Switch between different cluster contexts. Contains subcommands to manage contexts.",
+		Args:    cobra.NoArgs,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 			return selectContext(uncli)

cmd/uc/context/show.go

@@ -11,6 +11,7 @@ func NewShowCommand() *cobra.Command {
 	cmd := &cobra.Command{
 		Use:   "show",
 		Short: "Show current cluster context.",
+		Args:  cobra.NoArgs,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 			return show(uncli)

cmd/uc/context/use.go

@@ -7,6 +7,8 @@ import (
 
 	"charm.land/huh/v2"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
+	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/spf13/cobra"
 )
 
@@ -16,6 +18,7 @@ func NewUseCommand() *cobra.Command {
 		Short: "Switch to a different cluster context.",
 		Long: "Switch to a different cluster context. If no context is provided, " +
 			"a list of available contexts will be displayed for selection.",
+		Args: cobra.MaximumNArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 
@@ -29,6 +32,13 @@ func NewUseCommand() *cobra.Command {
 
 			return selectContext(uncli)
 		},
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Contexts(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	return cmd
@@ -41,6 +51,10 @@ func selectContext(uncli *cli.CLI) error {
 	if len(uncli.Config.Contexts) == 0 {
 		return fmt.Errorf("no contexts found in Uncloud config (%s)", uncli.Config.Path())
 	}
+	if !tui.IsTerminalAvailable() {
+		return fmt.Errorf("cannot select a context interactively without a terminal. " +
+			"Pass the context name explicitly: uc ctx use CONTEXT")
+	}
 
 	contextNames := slices.Sorted(maps.Keys(uncli.Config.Contexts))
 

cmd/uc/deploy.go

@@ -11,6 +11,7 @@ import (
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/docker/docker/pkg/stringid"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/logs"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
@@ -48,6 +49,9 @@ func NewDeployCommand() *cobra.Command {
 			return runDeploy(cmd.Context(), uncli, opts)
 		},
 		GroupID: "service",
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			return completion.ComposeServices(cmd.Context(), args, toComplete, opts.files, opts.profiles)
+		},
 	}
 
 	cmd.Flags().StringArrayVar(&opts.BuildServicesOptions.BuildArgs, "build-arg", nil,
@@ -159,6 +163,14 @@ func runDeploy(ctx context.Context, uncli *cli.CLI, opts deployOptions) error {
 		fmt.Println()
 	}
 
+	// Resolve 'secret://name' references to actual secret values before creating a deployment.
+	if compose.HasCommandSecretRefs(project) {
+		fmt.Fprintln(os.Stderr, "Resolving secrets...")
+	}
+	if err = compose.ResolveSecrets(ctx, project); err != nil {
+		return fmt.Errorf("resolve secrets: %w", err)
+	}
+
 	strategy := &deploy.RollingStrategy{
 		ForceRecreate:     opts.recreate,
 		SkipHealthMonitor: opts.skipHealth,
@@ -199,7 +211,7 @@ func runDeploy(ctx context.Context, uncli *cli.CLI, opts deployOptions) error {
 
 	// Ask for plan confirmation before proceeding with the deployment unless auto-confirmed with --yes.
 	if !opts.yes {
-		if !tui.IsStdinTerminal() {
+		if !tui.IsTerminalAvailable() {
 			return errors.New("cannot ask to confirm deployment plan in non-interactive mode, " +
 				"use --yes flag or set UNCLOUD_AUTO_CONFIRM=true to auto-confirm")
 		}
@@ -218,8 +230,7 @@ func runDeploy(ctx context.Context, uncli *cli.CLI, opts deployOptions) error {
 			return fmt.Errorf("confirm deployment: %w", err)
 		}
 		if !confirmed {
-			fmt.Println("Cancelled. No changes were made.")
-			return nil
+			return cli.Cancelled("Deploy cancelled. No changes were made.")
 		}
 	}
 

cmd/uc/dns/reserve.go

@@ -5,7 +5,7 @@ import (
 	"errors"
 	"fmt"
 
-	"github.com/psviderski/uncloud/cmd/uncloud/caddy"
+	"github.com/psviderski/uncloud/cmd/uc/caddy"
 	"github.com/psviderski/uncloud/internal/cli"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 	"github.com/psviderski/uncloud/pkg/api"

cmd/uc/image/ls.go

@@ -16,6 +16,7 @@ import (
 	"github.com/docker/go-units"
 
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
@@ -62,6 +63,8 @@ func NewListCommand() *cobra.Command {
 		"Filter images by machine name or ID. Can be specified multiple times or as a comma-separated list. "+
 			"(default is include all machines)")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 
@@ -85,19 +88,6 @@ func list(ctx context.Context, uncli *cli.CLI, opts listOptions) error {
 	}
 	defer clusterClient.Close()
 
-	// Get all machines to create ID to name mapping.
-	allMachines, err := clusterClient.ListMachines(ctx, nil)
-	if err != nil {
-		return fmt.Errorf("list machines: %w", err)
-	}
-
-	machineIDToName := make(map[string]string)
-	for _, machineMember := range allMachines {
-		if machineMember.Machine != nil && machineMember.Machine.Id != "" && machineMember.Machine.Name != "" {
-			machineIDToName[machineMember.Machine.Id] = machineMember.Machine.Name
-		}
-	}
-
 	machines := cli.ExpandCommaSeparatedValues(opts.machines)
 
 	clusterImages, err := clusterClient.ListImages(ctx, api.ImageFilter{
@@ -112,12 +102,15 @@ func list(ctx context.Context, uncli *cli.CLI, opts listOptions) error {
 	var rows []imageRow
 
 	for _, machineImages := range clusterImages {
-		// Get machine name for better readability.
-		machineName := machineImages.Metadata.Machine
-		if m := allMachines.FindByNameOrID(machineName); m != nil {
-			machineName = m.Machine.Name
+		if err := machineImages.Error(); err != nil {
+			tui.PrintWarning(fmt.Sprintf("failed to list images on machine '%s': %s",
+				machineImages.Metadata.MachineName, err))
+			continue
 		}
 
+		// Get machine name for better readability.
+		machineName := machineImages.Metadata.MachineName
+
 		store := "docker"
 		if machineImages.ContainerdStore {
 			store = "containerd"
@@ -186,7 +179,7 @@ func list(ctx context.Context, uncli *cli.CLI, opts listOptions) error {
 	})
 
 	// Print the images in a table format.
-	fmt.Println(formatImageTable(rows))
+	lipgloss.Println(formatImageTable(rows))
 
 	return nil
 }

cmd/uc/image/push.go

@@ -7,6 +7,7 @@ import (
 	"github.com/containerd/platforms"
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/pkg/client"
 	"github.com/spf13/cobra"
 )
@@ -54,6 +55,8 @@ The image is uploaded to all cluster machines (default) or the specified machine
 			"Local Docker must be configured to use containerd image store to support multi-platform images.",
 	)
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uc/images.go

@@ -3,7 +3,7 @@ package main
 import (
 	"strings"
 
-	"github.com/psviderski/uncloud/cmd/uncloud/image"
+	"github.com/psviderski/uncloud/cmd/uc/image"
 	"github.com/spf13/cobra"
 )
 

cmd/uc/machine/add.go

@@ -8,10 +8,9 @@ import (
 	"strings"
 	"time"
 
-	"charm.land/huh/v2/spinner"
 	"charm.land/lipgloss/v2"
 	"github.com/docker/compose/v2/pkg/progress"
-	"github.com/psviderski/uncloud/cmd/uncloud/caddy"
+	"github.com/psviderski/uncloud/cmd/uc/caddy"
 	"github.com/psviderski/uncloud/internal/cli"
 	"github.com/psviderski/uncloud/internal/cli/config"
 	"github.com/psviderski/uncloud/internal/cli/tui"
@@ -29,6 +28,8 @@ type addOptions struct {
 	sshKey      string
 	version     string
 	wgEndpoints []string
+	wgPort      int
+	wgMTU       int
 	yes         bool
 }
 
@@ -39,13 +40,19 @@ func NewAddCommand() *cobra.Command {
 		Short: "Add a remote machine to a cluster.",
 		Long: `Add a new machine to an existing Uncloud cluster.
 
+By default, it installs Docker and the Uncloud daemon on the machine over SSH unless --no-install
+is specified, which assumes they are already installed and running.
+
 Connection methods:
   [ssh://]user@host   - Use system 'ssh' command with full SSH config support (default, no prefix required)
   ssh+go://user@host  - Use Go's built-in SSH library`,
 		Args: cobra.ExactArgs(1),
-		RunE: func(cmd *cobra.Command, args []string) error {
+		PreRunE: func(cmd *cobra.Command, args []string) error {
 			cli.BindEnvToFlag(cmd, "yes", "UNCLOUD_AUTO_CONFIRM")
-
+			cli.BindEnvToFlag(cmd, "version", "UNCLOUD_DAEMON_VERSION")
+			return nil
+		},
+		RunE: func(cmd *cobra.Command, args []string) error {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 
 			// Determine connection mode and strip scheme.
@@ -70,14 +77,15 @@ Connection methods:
 			return add(cmd.Context(), uncli, remoteMachine, opts)
 		},
 	}
-	cmd.Flags().StringVarP(&opts.name, "name", "n", "", "Assign a name to the machine.")
+	cmd.Flags().StringVarP(&opts.name, "name", "n", "",
+		"Assign a name to the machine. (default is the machine's hostname)")
 	cmd.Flags().BoolVar(
 		&opts.noCaddy, "no-caddy", false,
 		"Don't deploy Caddy reverse proxy service to the machine.",
 	)
 	cmd.Flags().BoolVar(
 		&opts.noInstall, "no-install", false,
-		"Skip installation of Docker, Uncloud daemon, and dependencies on the machine. "+
+		"Skip installation of Docker and the Uncloud daemon on the machine. "+
 			"Assumes they're already installed and running.",
 	)
 	cmd.Flags().StringVar(
@@ -92,15 +100,24 @@ Connection methods:
 	)
 	cmd.Flags().StringVar(
 		&opts.version, "version", "latest",
-		"Version of the Uncloud daemon to install on the machine.",
+		"Version of the Uncloud daemon to install on the machine. [$UNCLOUD_DAEMON_VERSION]",
 	)
 	cmd.Flags().StringSliceVar(
 		&opts.wgEndpoints, "wg-endpoint", nil,
-		fmt.Sprintf("WireGuard endpoint address in format: IP, IP:PORT, IPv6, or [IPv6]:PORT. "+
-			"Default port %d is used if omitted.\n", network.WireGuardPort)+
-			"Other machines in the cluster will use this endpoint to establish a WireGuard connection to this machine.\n"+
+		"WireGuard endpoint address that other machines in the cluster should use to establish "+
+			"WireGuard connections\n"+
+			"to this machine. This doesn't change the address/port WireGuard listens on the machine.\n"+
+			"Format: IP, IP:PORT, IPv6, or [IPv6]:PORT. Default port is the value of --wg-port if omitted.\n"+
 			"Multiple endpoints can be specified by repeating the flag or using a comma-separated list.\n"+
-			"If not specified, the machine's routable IPs and public IP are auto-detected and used as endpoints.",
+			"Defaults to the auto-detected public and routable machine IPs.",
+	)
+	cmd.Flags().IntVar(
+		&opts.wgMTU, "wg-mtu", 0,
+		"MTU of the WireGuard network interface on the machine. (default auto-detects the optimal value)",
+	)
+	cmd.Flags().IntVar(
+		&opts.wgPort, "wg-port", network.DefaultWireGuardPort,
+		"UDP port WireGuard listens on for incoming connections from other machines.",
 	)
 	cmd.Flags().BoolVarP(&opts.yes, "yes", "y", false,
 		"Auto-confirm prompts (e.g., resetting an already initialised machine).\n"+
@@ -124,17 +141,26 @@ func add(ctx context.Context, uncli *cli.CLI, remoteMachine *cli.RemoteMachine,
 		publicIP = &ip
 	}
 
+	if opts.wgPort < 1 || opts.wgPort > 65535 {
+		return fmt.Errorf("invalid WireGuard port %d: must be between 1 and 65535", opts.wgPort)
+	}
+	if opts.wgMTU != 0 && (opts.wgMTU < network.MinWireGuardMTU || opts.wgMTU > 65535) {
+		return fmt.Errorf("invalid WireGuard MTU %d: must be 0 (auto-detect) or between %d and 65535",
+			opts.wgMTU, network.MinWireGuardMTU)
+	}
 	addOpts := cli.AddMachineOptions{
 		MachineName:   opts.name,
 		PublicIP:      publicIP,
 		RemoteMachine: remoteMachine,
 		SkipInstall:   opts.noInstall,
 		Version:       opts.version,
+		WireguardMTU:  opts.wgMTU,
+		WireguardPort: opts.wgPort,
 		AutoConfirm:   opts.yes,
 	}
 	if len(opts.wgEndpoints) > 0 {
 		expanded := cli.ExpandCommaSeparatedValues(opts.wgEndpoints)
-		endpoints, err := cli.ParseWireGuardEndpoints(expanded)
+		endpoints, err := cli.ParseWireGuardEndpoints(expanded, uint16(opts.wgPort))
 		if err != nil {
 			return fmt.Errorf("parse WireGuard endpoint (--wg-endpoint): %w", err)
 		}
@@ -153,19 +179,9 @@ func add(ctx context.Context, uncli *cli.CLI, remoteMachine *cli.RemoteMachine,
 	}
 
 	// Wait for the cluster to be initialised on the machine to be able to deploy the Caddy service.
-	err = spinner.New().
-		Title(" Waiting for the machine to join the cluster...").
-		Type(spinner.MiniDot).
-		WithTheme(spinner.ThemeFunc(func(isDark bool) *spinner.Styles {
-			return &spinner.Styles{
-				Spinner: lipgloss.NewStyle().Foreground(lipgloss.Yellow),
-				Title:   lipgloss.NewStyle(),
-			}
-		})).
-		ActionWithErr(func(ctx context.Context) error {
+	err = tui.RunSpinner(ctx, "Waiting for the machine to join the cluster...", func(ctx context.Context) error {
 		return machineClient.WaitClusterReady(ctx, 5*time.Minute)
-		}).
-		Run()
+	})
 	if err != nil {
 		return fmt.Errorf("wait for machine to join the cluster: %w", err)
 	}
@@ -231,8 +247,7 @@ func add(ctx context.Context, uncli *cli.CLI, remoteMachine *cli.RemoteMachine,
 				return fmt.Errorf("confirm deployment: %w", err)
 			}
 			if !confirmed {
-				fmt.Println("Cancelled. No changes were made.")
-				return nil
+				return cli.Cancelled("Caddy deploy cancelled. The machine has been added to the cluster.")
 			}
 		}
 

cmd/uc/machine/flags_test.go

@@ -0,0 +1,72 @@
+package machine
+
+import (
+	"testing"
+
+	"github.com/spf13/cobra"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// runVersionFlagEnvTest builds the given command for each case, stubs out RunE so only flag
+// parsing and PreRunE run (no SSH calls), and asserts the resolved --version flag value.
+// Note: cannot use t.Parallel() because subtests use t.Setenv().
+func runVersionFlagEnvTest(t *testing.T, newCommand func() *cobra.Command) {
+	t.Helper()
+
+	tests := []struct {
+		name string
+		args []string
+		env  string
+		want string
+	}{
+		{
+			name: "env var sets version when flag not passed",
+			args: []string{"root@localhost"},
+			env:  "v1.2.3",
+			want: "v1.2.3",
+		},
+		{
+			name: "explicit flag wins over env var",
+			args: []string{"root@localhost", "--version", "v9.9.9"},
+			env:  "v1.2.3",
+			want: "v9.9.9",
+		},
+		{
+			name: "defaults to latest when neither flag nor env var set",
+			args: []string{"root@localhost"},
+			want: "latest",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if tt.env != "" {
+				t.Setenv("UNCLOUD_DAEMON_VERSION", tt.env)
+			}
+
+			cmd := newCommand()
+			cmd.RunE = func(*cobra.Command, []string) error {
+				return nil
+			}
+			cmd.SetArgs(tt.args)
+			require.NoError(t, cmd.Execute())
+
+			version, err := cmd.Flags().GetString("version")
+			require.NoError(t, err)
+			assert.Equal(t, tt.want, version)
+		})
+	}
+}
+
+// TestInitCommandVersionFlagEnvVar verifies that the UNCLOUD_DAEMON_VERSION environment variable
+// is bound to the --version flag of 'machine init', and that an explicit flag wins.
+func TestInitCommandVersionFlagEnvVar(t *testing.T) {
+	runVersionFlagEnvTest(t, NewInitCommand)
+}
+
+// TestAddCommandVersionFlagEnvVar verifies that the UNCLOUD_DAEMON_VERSION environment variable
+// is bound to the --version flag of 'machine add', and that an explicit flag wins.
+func TestAddCommandVersionFlagEnvVar(t *testing.T) {
+	runVersionFlagEnvTest(t, NewAddCommand)
+}

cmd/uc/machine/init.go

@@ -7,13 +7,12 @@ import (
 	"strings"
 	"time"
 
-	"charm.land/huh/v2/spinner"
-	"charm.land/lipgloss/v2"
 	"github.com/docker/compose/v2/pkg/progress"
-	"github.com/psviderski/uncloud/cmd/uncloud/caddy"
-	"github.com/psviderski/uncloud/cmd/uncloud/dns"
+	"github.com/psviderski/uncloud/cmd/uc/caddy"
+	"github.com/psviderski/uncloud/cmd/uc/dns"
 	"github.com/psviderski/uncloud/internal/cli"
 	"github.com/psviderski/uncloud/internal/cli/config"
+	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 	"github.com/psviderski/uncloud/internal/machine/cluster"
 	"github.com/psviderski/uncloud/internal/machine/network"
@@ -33,6 +32,8 @@ type initOptions struct {
 	sshKey      string
 	version     string
 	wgEndpoints []string
+	wgPort      int
+	wgMTU       int
 	yes         bool
 }
 
@@ -44,6 +45,9 @@ func NewInitCommand() *cobra.Command {
 		Long: `Initialise a new cluster by setting up a remote machine as the first member.
 This command creates a new context in your Uncloud config to manage the cluster.
 
+By default, it installs Docker and the Uncloud daemon on the machine over SSH unless --no-install
+is specified, which assumes they are already installed and running.
+
 Connection methods:
   [ssh://]user@host   - Use system 'ssh' command with full SSH config support (default, no prefix required)
   ssh+go://user@host  - Use Go's built-in SSH library`,
@@ -61,9 +65,12 @@ Connection methods:
   uc machine init root@<your-server-ip> --no-caddy --no-dns`,
 		// TODO: support initialising a cluster on the local machine.
 		Args: cobra.MaximumNArgs(1),
-		RunE: func(cmd *cobra.Command, args []string) error {
+		PreRunE: func(cmd *cobra.Command, args []string) error {
 			cli.BindEnvToFlag(cmd, "yes", "UNCLOUD_AUTO_CONFIRM")
-
+			cli.BindEnvToFlag(cmd, "version", "UNCLOUD_DAEMON_VERSION")
+			return nil
+		},
+		RunE: func(cmd *cobra.Command, args []string) error {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 
 			var remoteMachine *cli.RemoteMachine
@@ -100,7 +107,7 @@ Connection methods:
 		"API endpoint for the Uncloud DNS service.")
 	cmd.Flags().StringVarP(
 		&opts.name, "name", "n", "",
-		"Assign a name to the machine.",
+		"Assign a name to the machine. (default is the machine's hostname)",
 	)
 	cmd.Flags().StringVar(
 		&opts.network, "network", cluster.DefaultNetwork.String(),
@@ -116,7 +123,7 @@ Connection methods:
 	)
 	cmd.Flags().BoolVar(
 		&opts.noInstall, "no-install", false,
-		"Skip installation of Docker, Uncloud daemon, and dependencies on the machine. "+
+		"Skip installation of Docker and the Uncloud daemon on the machine. "+
 			"Assumes they're already installed and running.",
 	)
 	cmd.Flags().StringVar(
@@ -131,15 +138,24 @@ Connection methods:
 	)
 	cmd.Flags().StringVar(
 		&opts.version, "version", "latest",
-		"Version of the Uncloud daemon to install on the machine.",
+		"Version of the Uncloud daemon to install on the machine. [$UNCLOUD_DAEMON_VERSION]",
 	)
 	cmd.Flags().StringSliceVar(
 		&opts.wgEndpoints, "wg-endpoint", nil,
-		fmt.Sprintf("WireGuard endpoint address in format: IP, IP:PORT, IPv6, or [IPv6]:PORT. "+
-			"Default port %d is used if omitted.\n", network.WireGuardPort)+
-			"Other machines in the cluster will use this endpoint to establish a WireGuard connection to this machine.\n"+
+		"WireGuard endpoint address that other machines in the cluster should use to establish "+
+			"WireGuard connections\n"+
+			"to this machine. This doesn't change the address/port WireGuard listens on the machine.\n"+
+			"Format: IP, IP:PORT, IPv6, or [IPv6]:PORT. Default port is the value of --wg-port if omitted.\n"+
 			"Multiple endpoints can be specified by repeating the flag or using a comma-separated list.\n"+
-			"If not specified, the machine's routable IPs and public IP are auto-detected and used as endpoints.",
+			"Defaults to the auto-detected public and routable machine IPs.",
+	)
+	cmd.Flags().IntVar(
+		&opts.wgMTU, "wg-mtu", 0,
+		"MTU of the WireGuard network interface on the machine. (default auto-detects the optimal value)",
+	)
+	cmd.Flags().IntVar(
+		&opts.wgPort, "wg-port", network.DefaultWireGuardPort,
+		"UDP port WireGuard listens on for incoming connections from other machines.",
 	)
 	cmd.Flags().BoolVarP(&opts.yes, "yes", "y", false,
 		"Auto-confirm prompts (e.g., resetting an already initialised machine).\n"+
@@ -177,6 +193,13 @@ func initCluster(ctx context.Context, uncli *cli.CLI, remoteMachine *cli.RemoteM
 		}
 		publicIP = &ip
 	}
+	if opts.wgPort < 1 || opts.wgPort > 65535 {
+		return fmt.Errorf("invalid WireGuard port %d: must be between 1 and 65535", opts.wgPort)
+	}
+	if opts.wgMTU != 0 && (opts.wgMTU < network.MinWireGuardMTU || opts.wgMTU > 65535) {
+		return fmt.Errorf("invalid WireGuard MTU %d: must be 0 (auto-detect) or between %d and 65535",
+			opts.wgMTU, network.MinWireGuardMTU)
+	}
 	initOpts := cli.InitClusterOptions{
 		Context:       opts.context,
 		MachineName:   opts.name,
@@ -185,11 +208,13 @@ func initCluster(ctx context.Context, uncli *cli.CLI, remoteMachine *cli.RemoteM
 		RemoteMachine: remoteMachine,
 		SkipInstall:   opts.noInstall,
 		Version:       opts.version,
+		WireguardMTU:  opts.wgMTU,
+		WireguardPort: opts.wgPort,
 		AutoConfirm:   opts.yes,
 	}
 	if len(opts.wgEndpoints) > 0 {
 		expanded := cli.ExpandCommaSeparatedValues(opts.wgEndpoints)
-		endpoints, err := cli.ParseWireGuardEndpoints(expanded)
+		endpoints, err := cli.ParseWireGuardEndpoints(expanded, uint16(opts.wgPort))
 		if err != nil {
 			return fmt.Errorf("parse WireGuard endpoint (--wg-endpoint): %w", err)
 		}
@@ -205,19 +230,9 @@ func initCluster(ctx context.Context, uncli *cli.CLI, remoteMachine *cli.RemoteM
 	// Since the cluster API needs a few moments to become ready after cluster initialisation,
 	// we keep the user informed during this wait. We wait here even if no Caddy or DNS is requested
 	// as the cluster needs to be ready so that commands such as 'uc machine ls' work immediately after init.
-	err = spinner.New().
-		Title(" Waiting for the cluster to be ready...").
-		Type(spinner.MiniDot).
-		WithTheme(spinner.ThemeFunc(func(isDark bool) *spinner.Styles {
-			return &spinner.Styles{
-				Spinner: lipgloss.NewStyle().Foreground(lipgloss.Yellow),
-				Title:   lipgloss.NewStyle(),
-			}
-		})).
-		ActionWithErr(func(ctx context.Context) error {
+	err = tui.RunSpinner(ctx, "Waiting for the cluster to be ready...", func(ctx context.Context) error {
 		return client.WaitClusterReady(ctx, 1*time.Minute)
-		}).
-		Run()
+	})
 	if err != nil {
 		return fmt.Errorf("wait for cluster to be ready: %w", err)
 	}

cmd/uc/machine/logs.go

@@ -3,10 +3,12 @@ package machine
 import (
 	"context"
 	"fmt"
+	"slices"
+	"strings"
 
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/logs"
-	"github.com/psviderski/uncloud/internal/journal"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/psviderski/uncloud/pkg/client"
 	"github.com/spf13/cobra"
@@ -18,14 +20,14 @@ func NewLogsCommand() *cobra.Command {
 	cmd := &cobra.Command{
 		Use:     "logs [SERVICE...]",
 		Aliases: []string{"log"},
-		Short:   "View systemd service logs.",
-		Long: `View logs from the specified systemd service(s) across all machines in the cluster.
+		Short:   "View system service logs.",
+		Long: `View logs from the specified system service(s) across all machines in the cluster.
 Use -m to restrict to specific machines.
 
 Supported services:
-  uncloud            the Uncloud daemon
+  corrosion  the Corrosion distributed state store
   docker     the Docker daemon
-  uncloud-corrosion  the Corrosion distributed state store
+  uncloud    the Uncloud daemon
 
 If no services are specified, streams logs from the uncloud service.`,
 		Example: `  # View recent logs for the uncloud service.
@@ -36,7 +38,7 @@ If no services are specified, streams logs from the uncloud service.`,
   uc machine logs -f uncloud
 
   # View logs from multiple services.
-  uc machine logs uncloud docker uncloud-corrosion
+  uc machine logs uncloud docker corrosion
 
   # Show last 20 lines per machine (default is 100).
   uc machine logs -n 20 docker
@@ -48,7 +50,7 @@ If no services are specified, streams logs from the uncloud service.`,
   uc machine logs --since 3h --until 1h30m docker
 
   # View logs only from specific machines.
-  uc machine logs -m machine1,machine2 uncloud uncloud-corrosion`,
+  uc machine logs -m machine1,machine2 uncloud corrosion`,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 			return runLogs(cmd.Context(), uncli, args, options)
@@ -56,17 +58,19 @@ If no services are specified, streams logs from the uncloud service.`,
 	}
 
 	cmd.Flags().AddFlagSet(logs.Flags(&options))
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 
-func runLogs(ctx context.Context, uncli *cli.CLI, units []string, opts logs.Options) error {
-	if len(units) == 0 {
-		units = []string{journal.UnitUncloud}
+func runLogs(ctx context.Context, uncli *cli.CLI, services []string, opts logs.Options) error {
+	if len(services) == 0 {
+		services = []string{api.SystemServiceUncloud}
 	}
-
-	for _, unit := range units {
-		if !journal.ValidUnit(unit) {
-			return fmt.Errorf("invalid systemd service '%s'", unit)
+	for _, service := range services {
+		if !slices.Contains(api.SystemServices, service) {
+			return fmt.Errorf("invalid system service '%s'; valid services: %s",
+				service, strings.Join(api.SystemServices, ", "))
 		}
 	}
 
@@ -101,27 +105,27 @@ func runLogs(ctx context.Context, uncli *cli.CLI, units []string, opts logs.Opti
 		machineNames = append(machineNames, m.Machine.Name)
 	}
 
-	// Collect one log stream per unit. MachineLogs merges across machines internally.
-	unitStreams := make([]<-chan api.ServiceLogEntry, 0, len(units))
-	for _, unit := range units {
-		ch, err := c.MachineLogs(ctx, unit, logsOpts)
+	// Collect one log stream per service. MachineLogs merges across machines internally.
+	serviceStreams := make([]<-chan api.ServiceLogEntry, 0, len(services))
+	for _, service := range services {
+		ch, err := c.MachineLogs(ctx, service, logsOpts)
 		if err != nil {
-			return fmt.Errorf("stream logs for systemd service '%s': %w", unit, err)
+			return fmt.Errorf("stream logs for system service '%s': %w", service, err)
 		}
-		unitStreams = append(unitStreams, ch)
+		serviceStreams = append(serviceStreams, ch)
 	}
 
 	var stream <-chan api.ServiceLogEntry
-	if len(unitStreams) == 1 {
-		stream = unitStreams[0]
+	if len(serviceStreams) == 1 {
+		stream = serviceStreams[0]
 	} else {
 		// Each MachineLogs stream already runs its own inner merger with stall detection,
-		// so the outer merger across units skips it to avoid duplicate warnings.
-		merger := client.NewLogMerger(unitStreams, client.LogMergerOptions{})
+		// so the outer merger across services skips it to avoid duplicate warnings.
+		merger := client.NewLogMerger(serviceStreams, client.LogMergerOptions{})
 		stream = merger.Stream()
 	}
 
-	formatter := logs.NewFormatter(machineNames, units, opts.UTC)
+	formatter := logs.NewFormatter(machineNames, services, opts.UTC)
 
 	// Print merged logs.
 	for entry := range stream {

cmd/uc/machine/ls.go

@@ -2,10 +2,12 @@ package machine
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
 	"net/netip"
 	"strings"
 
+	"charm.land/lipgloss/v2"
 	"github.com/psviderski/uncloud/internal/cli"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/internal/machine/network"
@@ -13,19 +15,29 @@ import (
 )
 
 func NewListCommand() *cobra.Command {
+	var output string
+
 	cmd := &cobra.Command{
 		Use:     "ls",
 		Aliases: []string{"list"},
 		Short:   "List machines in a cluster.",
 		RunE: func(cmd *cobra.Command, args []string) error {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
-			return list(cmd.Context(), uncli)
+			return list(cmd.Context(), uncli, output)
 		},
 	}
+
+	cmd.Flags().StringVarP(&output, "output", "o", "",
+		"Output format: 'json' or empty for a human-readable table.")
+
 	return cmd
 }
 
-func list(ctx context.Context, uncli *cli.CLI) error {
+func list(ctx context.Context, uncli *cli.CLI, output string) error {
+	if output != "" && output != "json" {
+		return fmt.Errorf("unsupported output format '%s' (supported: json)", output)
+	}
+
 	client, err := uncli.ConnectCluster(ctx)
 	if err != nil {
 		return fmt.Errorf("connect to cluster: %w", err)
@@ -37,9 +49,19 @@ func list(ctx context.Context, uncli *cli.CLI) error {
 		return fmt.Errorf("list machines: %w", err)
 	}
 
+	if output == "json" {
+		data, err := json.MarshalIndent(machines.ToNative(), "", "  ")
+		if err != nil {
+			return fmt.Errorf("marshal machines: %w", err)
+		}
+		fmt.Println(string(data))
+		return nil
+	}
+
 	// Print the list of machines in a table format.
 	t := tui.NewTable()
-	t.Headers("NAME", "STATE", "ADDRESS", "PUBLIC IP", "WIREGUARD ENDPOINTS", "MACHINE ID")
+	t.Headers("NAME", "STATE", "ADDRESS", "PUBLIC IP", "WIREGUARD ENDPOINTS",
+		"OS", "KERNEL", "ARCH", "DOCKER", "VERSION")
 
 	for _, member := range machines {
 		m := member.Machine
@@ -58,17 +80,46 @@ func list(ctx context.Context, uncli *cli.CLI) error {
 			endpoints[i] = addrPort.String()
 		}
 
+		arch := "-"
+		if m.Arch != "" {
+			arch = m.Arch
+		}
+
+		osName := "-"
+		if m.OsPrettyName != "" {
+			osName = m.OsPrettyName
+		}
+
+		kernel := "-"
+		if m.KernelVersion != "" {
+			kernel = m.KernelVersion
+		}
+
+		daemonVersion := "-"
+		if m.DaemonVersion != "" {
+			daemonVersion = m.DaemonVersion
+		}
+
+		dockerVersion := "-"
+		if m.DockerVersion != "" {
+			dockerVersion = m.DockerVersion
+		}
+
 		t.Row(
 			m.Name,
 			capitalise(member.State.String()),
 			subnet.String(),
 			publicIP,
 			strings.Join(endpoints, tui.Faint.Render(", ")),
-			member.Machine.Id,
+			osName,
+			kernel,
+			arch,
+			dockerVersion,
+			daemonVersion,
 		)
 	}
 
-	fmt.Println(t)
+	lipgloss.Println(t)
 	return nil
 }
 

cmd/uc/machine/rm.go

@@ -14,6 +14,7 @@ import (
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/docker/docker/api/types/container"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 	"github.com/psviderski/uncloud/pkg/api"
@@ -37,6 +38,13 @@ func NewRmCommand() *cobra.Command {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 			return remove(cmd.Context(), uncli, args[0], opts)
 		},
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Machines(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	cmd.Flags().BoolVarP(&opts.yes, "yes", "y", false,
@@ -55,15 +63,16 @@ func remove(ctx context.Context, uncli *cli.CLI, nameOrID string, opts removeOpt
 	}
 	defer client.Close()
 
-	// Verify the machine exists and list all service containers on it including stopped ones.
-	mctx, machines, err := client.ProxyMachinesContext(ctx, []string{nameOrID})
+	// Verify the machine exists in the cluster.
+	member, err := client.InspectMachine(ctx, nameOrID)
 	if err != nil {
-		return err
+		return fmt.Errorf("inspect machine '%s': %w", nameOrID, err)
 	}
-	if len(machines) == 0 {
-		return fmt.Errorf("machine '%s' not found in the cluster", nameOrID)
-	}
-	m := machines[0].Machine
+	m := member.Machine
+
+	// Create a proxy context for the machine being removed.
+	// This is used for calls that need to run directly on that machine.
+	rmCtx := client.ProxySingleMachineContext(ctx, m.Id)
 
 	// Verify if the machine being removed is the proxy machine we're connected to.
 	proxyMachine, err := client.MachineClient.Inspect(ctx, nil)
@@ -95,7 +104,7 @@ func remove(ctx context.Context, uncli *cli.CLI, nameOrID string, opts removeOpt
 	if reset {
 		// Check if the machine is up and has service containers.
 		listOpts := container.ListOptions{All: true}
-		machineContainers, err := client.Docker.ListServiceContainers(mctx, "", listOpts)
+		machineContainers, err := client.Docker.ListServiceContainers(rmCtx, "", listOpts)
 		if err == nil {
 			reachable = true
 			containers = machineContainers[0].Containers
@@ -105,7 +114,7 @@ func remove(ctx context.Context, uncli *cli.CLI, nameOrID string, opts removeOpt
 					plural = "s"
 				}
 				fmt.Printf("Found %d service container%s on machine '%s':\n", len(containers), plural, m.Name)
-				fmt.Println(formatContainerTree(containers))
+				lipgloss.Println(formatContainerTree(containers))
 				fmt.Println()
 				fmt.Println("This will remove all service containers from the machine, remove it from the cluster, " +
 					"and reset it to the uninitialised state.")
@@ -127,8 +136,7 @@ func remove(ctx context.Context, uncli *cli.CLI, nameOrID string, opts removeOpt
 			return fmt.Errorf("confirm removal: %w", err)
 		}
 		if !confirmed {
-			fmt.Println("Cancelled. Machine was not removed.")
-			return nil
+			return cli.Cancelled("Cancelled. Machine was not removed.")
 		}
 	}
 
@@ -142,20 +150,22 @@ func remove(ctx context.Context, uncli *cli.CLI, nameOrID string, opts removeOpt
 		fmt.Println()
 	}
 
-	if _, err = client.RemoveMachine(ctx, &pb.RemoveMachineRequest{Id: m.Id}); err != nil {
-		return fmt.Errorf("remove machine from cluster: %w", err)
-	}
-	fmt.Printf("Machine '%s' removed from the cluster.\n", m.Name)
-
+	// Initiate reset before removing the machine from the cluster to stop it from updating the cluster store.
+	// This is still optimistic as Reset only triggers the reset process that runs asynchronously.
 	if reset && reachable {
-		_, err = client.MachineClient.Reset(mctx, &pb.ResetRequest{})
+		_, err = client.MachineClient.Reset(rmCtx, &pb.ResetRequest{})
 		if err != nil {
-			fmt.Printf("WARNING: Failed to reset machine: %v\n", err)
+			tui.PrintWarning(fmt.Sprintf("Failed to reset machine: %v\n", err))
 		} else {
 			fmt.Println("Machine reset initiated and will complete in the background.")
 		}
 	}
 
+	if _, err = client.RemoveMachine(ctx, &pb.RemoveMachineRequest{Id: m.Id}); err != nil {
+		return fmt.Errorf("remove machine from cluster: %w", err)
+	}
+	fmt.Printf("Machine '%s' removed from the cluster.\n", m.Name)
+
 	// Remove the connection to the machine from the uncloud config if it exists.
 	if uncli.Config != nil {
 		contextName := uncli.ContextOverrideOrCurrent()

cmd/uc/machine/rtt.go

@@ -6,6 +6,7 @@ import (
 	"sort"
 	"time"
 
+	"charm.land/lipgloss/v2"
 	"github.com/psviderski/uncloud/internal/cli"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/spf13/cobra"
@@ -38,10 +39,7 @@ func rtt(ctx context.Context, uncli *cli.CLI) error {
 	defer client.Close()
 
 	// Setup context to proxy request to all machines.
-	ctx, _, err = client.ProxyMachinesContext(ctx, nil)
-	if err != nil {
-		return fmt.Errorf("setup proxy context: %w", err)
-	}
+	ctx = client.ProxyMachinesContext(ctx, nil)
 
 	resp, err := client.MachineClient.InspectMachine(ctx, &emptypb.Empty{})
 	if err != nil {
@@ -51,6 +49,15 @@ func rtt(ctx context.Context, uncli *cli.CLI) error {
 	// Map machine IDs to names for display from the response.
 	machineNames := make(map[string]string)
 	for _, m := range resp.Machines {
+		// NOTE: Metadata should never be nil in practice. This is legacy fallback that will be removed.
+		if m.Metadata == nil {
+			tui.PrintWarning("metadata is missing in response from unknown server")
+			continue
+		}
+		if m.Metadata.Error != "" {
+			tui.PrintWarning(fmt.Sprintf("failed to inspect machine '%s': %s", m.Metadata.MachineName, m.Metadata.Error))
+			continue
+		}
 		if m.Machine == nil {
 			continue
 		}
@@ -101,7 +108,7 @@ func rtt(ctx context.Context, uncli *cli.CLI) error {
 		t.Row(r.machine, r.peer, tui.FormatRTT(r.median), formatRTTStdDev(r.stdDev))
 	}
 
-	fmt.Println(t)
+	lipgloss.Println(t)
 	return nil
 }
 

cmd/uc/machine/update.go

@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 	"github.com/psviderski/uncloud/internal/machine/network"
 	"github.com/spf13/cobra"
@@ -46,6 +47,13 @@ At least one flag must be specified to perform an update.`,
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 			return update(cmd.Context(), uncli, cmd, opts, args[0])
 		},
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Machines(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	cmd.Flags().StringVar(
@@ -59,9 +67,11 @@ At least one flag must be specified to perform an update.`,
 	)
 	cmd.Flags().StringSliceVar(
 		&opts.wgEndpoints, "wg-endpoint", nil,
-		fmt.Sprintf("WireGuard endpoint address in format: IP, IP:PORT, IPv6, or [IPv6]:PORT. "+
-			"Default port %d is used if omitted.\n", network.WireGuardPort)+
-			"Other machines in the cluster will use this endpoint to establish a WireGuard connection to this machine.\n"+
+		fmt.Sprintf("WireGuard endpoint address that other machines in the cluster should use to establish "+
+			"WireGuard connections\n"+
+			"to this machine. This doesn't change the address/port WireGuard listens on the machine.\n"+
+			"Format: IP, IP:PORT, IPv6, or [IPv6]:PORT. Default port is %d if omitted.\n",
+			network.DefaultWireGuardPort)+
 			"Multiple endpoints can be specified by repeating the flag or using a comma-separated list.",
 	)
 
@@ -80,16 +90,13 @@ func update(ctx context.Context, uncli *cli.CLI, cmd *cobra.Command, opts update
 	}
 	defer client.Close()
 
-	// First, resolve the machine to get its ID
+	// Resolve the machine to capture its current configuration for the before/after report and to validate existence.
 	machine, err := client.InspectMachine(ctx, machineNameOrID)
 	if err != nil {
 		return fmt.Errorf("find machine: %w", err)
 	}
 
-	// Build the update request
-	req := &pb.UpdateMachineRequest{
-		MachineId: machine.Machine.Id,
-	}
+	req := &pb.UpdateMachineRequest{}
 
 	if opts.name != "" {
 		req.Name = &opts.name
@@ -112,7 +119,7 @@ func update(ctx context.Context, uncli *cli.CLI, cmd *cobra.Command, opts update
 	// Parse and set endpoints if the flag was explicitly provided.
 	if cmd.Flags().Changed("wg-endpoint") {
 		expanded := cli.ExpandCommaSeparatedValues(opts.wgEndpoints)
-		endpoints, err := cli.ParseWireGuardEndpoints(expanded)
+		endpoints, err := cli.ParseWireGuardEndpoints(expanded, network.DefaultWireGuardPort)
 		if err != nil {
 			return err
 		}
@@ -122,8 +129,7 @@ func update(ctx context.Context, uncli *cli.CLI, cmd *cobra.Command, opts update
 		req.Endpoints = endpoints
 	}
 
-	// Perform the update operation
-	updatedMachine, err := client.UpdateMachine(ctx, req)
+	updatedMachine, err := client.UpdateMachine(ctx, machine.Machine.Id, req)
 	if err != nil {
 		return fmt.Errorf("update machine: %w", err)
 	}

cmd/uc/main.go

@@ -2,26 +2,29 @@ package main
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net/netip"
+	"os"
 	"strings"
 
-	"charm.land/lipgloss/v2"
-	"github.com/psviderski/uncloud/cmd/uncloud/caddy"
-	cmdcontext "github.com/psviderski/uncloud/cmd/uncloud/context"
-	"github.com/psviderski/uncloud/cmd/uncloud/dns"
-	"github.com/psviderski/uncloud/cmd/uncloud/image"
-	cmdmachine "github.com/psviderski/uncloud/cmd/uncloud/machine"
-	"github.com/psviderski/uncloud/cmd/uncloud/service"
-	"github.com/psviderski/uncloud/cmd/uncloud/volume"
-	"github.com/psviderski/uncloud/cmd/uncloud/wg"
+	"github.com/psviderski/uncloud/cmd/uc/caddy"
+	cmdcontext "github.com/psviderski/uncloud/cmd/uc/context"
+	"github.com/psviderski/uncloud/cmd/uc/dns"
+	"github.com/psviderski/uncloud/cmd/uc/image"
+	cmdmachine "github.com/psviderski/uncloud/cmd/uc/machine"
+	"github.com/psviderski/uncloud/cmd/uc/service"
+	"github.com/psviderski/uncloud/cmd/uc/volume"
+	"github.com/psviderski/uncloud/cmd/uc/wg"
 	"github.com/psviderski/uncloud/internal/cli"
 	"github.com/psviderski/uncloud/internal/cli/config"
+	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/internal/fs"
 	"github.com/psviderski/uncloud/internal/log"
 	"github.com/psviderski/uncloud/internal/machine"
 	"github.com/psviderski/uncloud/internal/version"
 	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
 )
 
 type globalOptions struct {
@@ -37,10 +40,16 @@ func main() {
 	cmd := &cobra.Command{
 		Use:           "uc",
 		Short:         "A CLI tool for managing Uncloud resources such as machines, services, and volumes.",
-		Version:       version.String(),
 		SilenceUsage:  true,
 		SilenceErrors: true,
 		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
+			// Shell completion runs through the hidden __complete command which has flag parsing disabled,
+			// so the global flags from the completed command line are never parsed. Apply them manually to make
+			// completion work with --connect, --context, and --uncloud-config.
+			if cmd.Name() == cobra.ShellCompRequestCmd {
+				applyGlobalFlagsFromCompletionArgs(cmd.Root().PersistentFlags(), os.Args[1:])
+			}
+
 			cli.BindEnvToFlag(cmd, "connect", "UNCLOUD_CONNECT")
 			cli.BindEnvToFlag(cmd, "context", "UNCLOUD_CONTEXT")
 			cli.BindEnvToFlag(cmd, "uncloud-config", "UNCLOUD_CONFIG")
@@ -111,15 +120,11 @@ func main() {
 		defaultHelpFunc(c, args)
 		// Only show links for the root 'uc' command.
 		if c.Name() == "uc" {
-			urlStyle := lipgloss.NewStyle().
-				Underline(true).
-				Foreground(lipgloss.Color("12")) // light blue
-
 			fmt.Fprintln(c.OutOrStdout())
 			fmt.Fprintf(c.OutOrStdout(), "Learn more about Uncloud:       %s\n",
-				urlStyle.Render("https://uncloud.run/docs"))
+				tui.URLStyle.Render(version.DocsURL))
 			fmt.Fprintf(c.OutOrStdout(), "Join our Discord community:     %s\n",
-				urlStyle.Render("https://uncloud.run/discord"))
+				tui.URLStyle.Render(version.DiscordURL))
 		}
 	})
 
@@ -134,6 +139,7 @@ func main() {
 		NewDocsCommand(),
 		NewImagesCommand(),
 		NewPsCommand(),
+		NewProxyCommand(),
 		caddy.NewRootCommand(),
 		cmdcontext.NewRootCommand(),
 		dns.NewRootCommand(),
@@ -149,8 +155,39 @@ func main() {
 		service.NewScaleCommand("service"),
 		service.NewStartCommand("service"),
 		service.NewStopCommand("service"),
+		NewVersionCommand(),
 		volume.NewRootCommand(),
 		wg.NewRootCommand(),
 	)
-	cobra.CheckErr(cmd.Execute())
+	if err := cmd.Execute(); err != nil {
+		if cancelled, ok := errors.AsType[*cli.CancelledError](err); ok {
+			fmt.Fprintln(os.Stderr, cancelled.Error())
+			os.Exit(1)
+		}
+		cobra.CheckErr(err)
+	}
+}
+
+// applyGlobalFlagsFromCompletionArgs parses the global flags from the raw arguments of a __complete command and applies
+// the ones found to flags. The trailing word being completed, unknown flags, and positional arguments are ignored.
+func applyGlobalFlagsFromCompletionArgs(flags *pflag.FlagSet, args []string) {
+	// The shell always passes the word being completed as the last argument, even if it's empty.
+	// Exclude it from parsing as its value may not be complete yet.
+	if len(args) == 0 {
+		return
+	}
+	args = args[:len(args)-1]
+
+	fset := pflag.NewFlagSet("global", pflag.ContinueOnError)
+	fset.ParseErrorsAllowlist.UnknownFlags = true
+	fset.String("connect", "", "")
+	fset.StringP("context", "c", "", "")
+	fset.String("uncloud-config", "", "")
+	// Parsing an incomplete command line may fail, apply the flags parsed so far anyway.
+	_ = fset.Parse(args)
+
+	fset.Visit(func(f *pflag.Flag) {
+		// Setting the flag marks it as changed so it takes precedence over environment variables.
+		_ = flags.Set(f.Name, f.Value.String())
+	})
 }

cmd/uc/main_test.go

@@ -0,0 +1,116 @@
+package main
+
+import (
+	"slices"
+	"testing"
+
+	"github.com/spf13/pflag"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestApplyGlobalFlagsFromCompletionArgs(t *testing.T) {
+	defaultConfigPath := "~/.config/uncloud/config.yaml"
+
+	tests := []struct {
+		name           string
+		args           []string
+		wantConnect    string
+		wantContext    string
+		wantConfigPath string
+		// Flag names expected to be marked as changed on the target flag set.
+		wantChanged []string
+	}{
+		{
+			name: "no flags",
+			args: []string{"__complete", "inspect", ""},
+		},
+		{
+			name:        "connect with space",
+			args:        []string{"__complete", "--connect", "ssh://user@host", "inspect", ""},
+			wantConnect: "ssh://user@host",
+			wantChanged: []string{"connect"},
+		},
+		{
+			name:        "connect with equals",
+			args:        []string{"__complete", "--connect=tcp://127.0.0.1:51000", "inspect", ""},
+			wantConnect: "tcp://127.0.0.1:51000",
+			wantChanged: []string{"connect"},
+		},
+		{
+			name:        "context shorthand",
+			args:        []string{"__complete", "-c", "prod", "inspect", ""},
+			wantContext: "prod",
+			wantChanged: []string{"context"},
+		},
+		{
+			name:           "all flags",
+			args:           []string{"__complete", "--connect", "user@host", "-c", "prod", "--uncloud-config", "/tmp/uncloud.yaml", "inspect", ""},
+			wantConnect:    "user@host",
+			wantContext:    "prod",
+			wantConfigPath: "/tmp/uncloud.yaml",
+			wantChanged:    []string{"connect", "context", "uncloud-config"},
+		},
+		{
+			name:        "unknown flags are ignored",
+			args:        []string{"__complete", "--quiet", "-n", "5", "--connect", "user@host", "logs", ""},
+			wantConnect: "user@host",
+			wantChanged: []string{"connect"},
+		},
+		{
+			name: "flags after double dash are ignored",
+			args: []string{"__complete", "exec", "svc", "--", "sh", "--connect", "user@host"},
+		},
+		{
+			name:        "flags before double dash are applied",
+			args:        []string{"__complete", "--connect", "user@host", "exec", "svc", "--", "sh", "-c", "env"},
+			wantConnect: "user@host",
+			wantChanged: []string{"connect"},
+		},
+		{
+			name:        "partial flag name being completed is excluded",
+			args:        []string{"__complete", "--connect", "user@host", "inspect", "--context"},
+			wantConnect: "user@host",
+			wantChanged: []string{"connect"},
+		},
+		{
+			name: "partial flag value being completed is excluded",
+			args: []string{"__complete", "--uncloud-config", "/tmp/"},
+		},
+		{
+			name: "partial connect value being completed is excluded",
+			args: []string{"__complete", "--connect", "tcp://127.0.0.1:5"},
+		},
+		{
+			name:           "completed flag value with partial command word",
+			args:           []string{"__complete", "--uncloud-config", "/tmp/uncloud.yaml", "insp"},
+			wantConfigPath: "/tmp/uncloud.yaml",
+			wantChanged:    []string{"uncloud-config"},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			// Mirror the global persistent flags defined on the root command.
+			var opts globalOptions
+			flags := pflag.NewFlagSet("test", pflag.ContinueOnError)
+			flags.StringVar(&opts.connect, "connect", "", "")
+			flags.StringVarP(&opts.context, "context", "c", "", "")
+			flags.StringVar(&opts.configPath, "uncloud-config", defaultConfigPath, "")
+
+			applyGlobalFlagsFromCompletionArgs(flags, tt.args)
+
+			assert.Equal(t, tt.wantConnect, opts.connect)
+			assert.Equal(t, tt.wantContext, opts.context)
+			wantConfigPath := tt.wantConfigPath
+			if wantConfigPath == "" {
+				wantConfigPath = defaultConfigPath
+			}
+			assert.Equal(t, wantConfigPath, opts.configPath)
+
+			for _, name := range []string{"connect", "context", "uncloud-config"} {
+				assert.Equal(t, slices.Contains(tt.wantChanged, name), flags.Changed(name),
+					"changed status of flag '%s'", name)
+			}
+		})
+	}
+}

cmd/uc/proxy.go

@@ -0,0 +1,175 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net"
+	"strconv"
+	"strings"
+
+	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
+	"github.com/psviderski/uncloud/internal/cli/tui"
+	"github.com/psviderski/uncloud/internal/proxy"
+	"github.com/psviderski/uncloud/pkg/api"
+	"github.com/spf13/cobra"
+)
+
+type proxyOptions struct {
+	localPort  int
+	remotePort int
+	service    string
+}
+
+// NewProxyCommand creates a new command to proxy a local port to a service's port in the cluster.
+func NewProxyCommand() *cobra.Command {
+	opts := proxyOptions{}
+	cmd := &cobra.Command{
+		Use:   "proxy SERVICE [LOCAL_PORT:]REMOTE_PORT",
+		Args:  cobra.ExactArgs(2),
+		Short: "Proxy a service port to a local port.",
+		Long: `Proxy a service port in the cluster to a local port on this machine.
+
+If the service runs multiple containers, the command connects to the first running and healthy one.
+If you don't provide a local port, the command picks a random one.
+
+The connection stays open for as long as the command runs.`,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+
+			opts.service = args[0]
+
+			parts := strings.Split(args[1], ":")
+			switch len(parts) {
+			case 1:
+				remoteport, err := strconv.Atoi(parts[0])
+				if err != nil {
+					return fmt.Errorf("invalid remote port: '%s': %w", parts[0], err)
+				}
+				opts.remotePort = remoteport
+			case 2:
+				localport, err := strconv.Atoi(parts[0])
+				if err != nil {
+					return fmt.Errorf("invalid local port: '%s': %w", parts[0], err)
+				}
+				remoteport, err := strconv.Atoi(parts[1])
+				if err != nil {
+					return fmt.Errorf("invalid remote port: '%s': %w", parts[1], err)
+				}
+				opts.localPort = localport
+				opts.remotePort = remoteport
+			default:
+				return fmt.Errorf("invalid port")
+			}
+
+			return runProxy(cmd.Context(), uncli, opts)
+		},
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
+	}
+
+	return cmd
+}
+
+func runProxy(ctx context.Context, uncli *cli.CLI, opts proxyOptions) error {
+	if opts.localPort < 0 || opts.localPort > 65535 {
+		return fmt.Errorf("invalid local port %d: must be between 0 and 65535", opts.localPort)
+	}
+	if opts.remotePort < 1 || opts.remotePort > 65535 {
+		return fmt.Errorf("invalid remote port %d: must be between 1 and 65535", opts.remotePort)
+	}
+
+	clusterClient, err := uncli.ConnectCluster(ctx)
+	if err != nil {
+		return fmt.Errorf("connect to cluster: %w", err)
+	}
+	defer clusterClient.Close()
+
+	svc, err := clusterClient.InspectService(ctx, opts.service)
+	if err != nil {
+		if errors.Is(err, api.ErrNotFound) {
+			return fmt.Errorf("service '%s' not found in the cluster", opts.service)
+		}
+		return fmt.Errorf("inspect service '%s': %w", opts.service, err)
+	}
+
+	// Pick the first running and healthy container to proxy to.
+	var ctr *api.MachineServiceContainer
+	for i := range svc.Containers {
+		if svc.Containers[i].Container.Healthy() {
+			ctr = &svc.Containers[i]
+			break
+		}
+	}
+	if ctr == nil {
+		return fmt.Errorf("no running healthy container found for service '%s'", opts.service)
+	}
+
+	containerID := ctr.Container.ShortID()
+	ip := ctr.Container.UncloudNetworkIP()
+	if !ip.IsValid() {
+		return fmt.Errorf("container '%s' is not connected to the uncloud Docker network (could be host network)",
+			containerID)
+	}
+
+	dialer, err := clusterClient.Dialer()
+	if err != nil {
+		return fmt.Errorf("get proxy dialer: %w", err)
+	}
+
+	listener, err := net.Listen("tcp", net.JoinHostPort("127.0.0.1", strconv.Itoa(opts.localPort)))
+	if err != nil {
+		return fmt.Errorf("listen on 127.0.0.1:%d: %w", opts.localPort, err)
+	}
+
+	// There is no precheck if we can connect, as this always succeeds, only the proxy connects with the
+	// endpoint and shuffles the data, *it* will actually experience errors.
+	remoteAddr := net.JoinHostPort(ip.String(), strconv.Itoa(opts.remotePort))
+
+	p := &proxy.Proxy{
+		Listener:    listener,
+		RemoteAddr:  remoteAddr,
+		DialContext: dialer.DialContext,
+		OnError: func(err error) {
+			if proxy.IsConnectionClosedError(err) {
+				return
+			}
+			// A more actionable error instead of the cryptic [ssh -W] command error.
+			if strings.Contains(err.Error(), "Session open refused by peer") {
+				fmt.Printf("Could not connect to '%s': connection refused. "+
+					"Check that the service is running and listening on port %d inside the container.\n",
+					remoteAddr, opts.remotePort)
+				return
+			}
+
+			fmt.Printf("Failed to proxy a connection to '%s': %v\n", remoteAddr, err)
+		},
+	}
+
+	// Prefix the local address with the scheme for common HTTP ports so it becomes control-clickable in most
+	// terminals. We assume plain HTTP since TLS is typically terminated by Caddy in front of the service.
+	fmt.Printf("%s%s → %s (%s%s%s)\n", schemeForPort(opts.remotePort), p.Listener.Addr().String(),
+		remoteAddr, opts.service, tui.Faint.Render("/"), containerID)
+
+	if err = p.Run(ctx); err != nil {
+		return fmt.Errorf("run proxy to '%s': %w", remoteAddr, err)
+	}
+	return nil
+}
+
+// schemeForPort returns the "http://" URL scheme prefix for the ports most likely to serve plain HTTP,
+// or an empty string otherwise.
+func schemeForPort(port int) string {
+	switch port {
+	case 80, 3000, 8000, 8080, 8081, 8888, 9090:
+		return "http://"
+	default:
+		return ""
+	}
+}

cmd/uc/ps.go

@@ -6,7 +6,6 @@ import (
 	"sort"
 	"time"
 
-	"charm.land/huh/v2/spinner"
 	"charm.land/lipgloss/v2"
 	"github.com/docker/docker/api/types/container"
 	"github.com/docker/go-units"
@@ -83,20 +82,10 @@ func runPs(ctx context.Context, uncli *cli.CLI, opts psOptions) error {
 	defer clusterClient.Close()
 
 	var containers []containerInfo
-	err = spinner.New().
-		Title(" Collecting container info...").
-		Type(spinner.MiniDot).
-		WithTheme(spinner.ThemeFunc(func(isDark bool) *spinner.Styles {
-			return &spinner.Styles{
-				Spinner: lipgloss.NewStyle().Foreground(lipgloss.Yellow),
-				Title:   lipgloss.NewStyle(),
-			}
-		})).
-		ActionWithErr(func(ctx context.Context) error {
+	err = tui.RunSpinner(ctx, "Collecting container info...", func(ctx context.Context) error {
 		containers, err = collectContainers(ctx, clusterClient)
 		return err
-		}).
-		Run()
+	})
 	if err != nil {
 		return fmt.Errorf("collect containers: %w", err)
 	}
@@ -193,23 +182,12 @@ func printContainers(containers []containerInfo) error {
 		}
 	}
 
-	fmt.Println(t)
+	lipgloss.Println(t)
 	return nil
 }
 
 func collectContainers(ctx context.Context, cli *client.Client) ([]containerInfo, error) {
-	listCtx, machines, err := cli.ProxyMachinesContext(ctx, nil)
-	if err != nil {
-		return nil, fmt.Errorf("proxy machines context: %w", err)
-	}
-
-	// Create a map of IP to machine name for resolving response metadata
-	machinesNamesByIP := make(map[string]string)
-	for _, m := range machines {
-		if addr, err := m.Machine.Network.ManagementIp.ToAddr(); err == nil {
-			machinesNamesByIP[addr.String()] = m.Machine.Name
-		}
-	}
+	listCtx := cli.ProxyMachinesContext(ctx, nil)
 
 	// List all service containers across all machines in the cluster.
 	machineContainers, err := cli.Docker.ListServiceContainers(
@@ -221,29 +199,17 @@ func collectContainers(ctx context.Context, cli *client.Client) ([]containerInfo
 
 	var containers []containerInfo
 	for _, msc := range machineContainers {
-		// Metadata can be nil if the request was broadcasted to only one machine.
-		if msc.Metadata == nil && len(machineContainers) > 1 {
-			return nil, fmt.Errorf("something went wrong with gRPC proxy: metadata is missing for a machine response")
+		// NOTE: Metadata should never be nil in practice. This is legacy fallback that will be removed.
+		if msc.Metadata == nil {
+			tui.PrintWarning("metadata is missing in response from unknown server")
+			continue
 		}
 
-		machineName := "unknown"
-		if msc.Metadata != nil {
-			var ok bool
-			machineName, ok = machinesNamesByIP[msc.Metadata.Machine]
-			if !ok {
-				// Fallback to machine's IP as name.
-				machineName = msc.Metadata.Machine
-			}
-		} else {
-			// Fallback to the first available machine name.
-			if len(machines) > 0 {
-				machineName = machines[0].Machine.Name
-			}
-		}
+		machineName := msc.Metadata.MachineName
 
-		if msc.Metadata != nil && msc.Metadata.Error != "" {
-			tui.PrintWarning(fmt.Sprintf("failed to list containers on machine %s: %s", machineName,
-				msc.Metadata.Error))
+		if msc.Metadata.Error != "" {
+			tui.PrintWarning(fmt.Sprintf("failed to list service containers on machine %s: %s",
+				machineName, msc.Metadata.Error))
 			continue
 		}
 

cmd/uc/ps_test.go

@@ -0,0 +1,105 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"testing"
+
+	"github.com/psviderski/uncloud/internal/machine/api/pb"
+	"github.com/psviderski/uncloud/internal/machine/docker"
+	"github.com/psviderski/uncloud/pkg/client"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"google.golang.org/grpc"
+)
+
+type mockDockerClient struct {
+	pb.DockerClient
+	listResp *pb.ListServiceContainersResponse
+	listErr  error
+}
+
+func (m *mockDockerClient) ListServiceContainers(ctx context.Context, in *pb.ListServiceContainersRequest, opts ...grpc.CallOption) (*pb.ListServiceContainersResponse, error) {
+	return m.listResp, m.listErr
+}
+
+func TestCollectContainers(t *testing.T) {
+	containerData1 := map[string]interface{}{
+		"Id":   "container1",
+		"Name": "container-1",
+		"Config": map[string]any{
+			"Image": "image-1",
+		},
+		"State": map[string]any{
+			"Status":     "running",
+			"StartedAt":  "2023-01-01T12:00:00Z",
+			"FinishedAt": "0001-01-01T00:00:00Z",
+		},
+		"NetworkSettings": map[string]any{
+			"Networks": map[string]any{},
+		},
+	}
+	containerJSON1, _ := json.Marshal(containerData1)
+
+	containerData2 := map[string]any{
+		"Id":   "container2",
+		"Name": "container-2",
+		"Config": map[string]any{
+			"Image": "image-2",
+		},
+		"State": map[string]any{
+			"Status":     "running",
+			"StartedAt":  "2023-01-01T12:00:00Z",
+			"FinishedAt": "0001-01-01T00:00:00Z",
+		},
+		"NetworkSettings": map[string]any{
+			"Networks": map[string]any{},
+		},
+	}
+	containerJSON2, _ := json.Marshal(containerData2)
+
+	serviceSpecJSON, _ := json.Marshal(map[string]any{})
+
+	mockDocker := &mockDockerClient{
+		listResp: &pb.ListServiceContainersResponse{
+			Messages: []*pb.MachineServiceContainers{
+				{
+					Metadata: &pb.Metadata{MachineAddr: "10.0.0.1", MachineName: "machine-1"},
+					Containers: []*pb.ServiceContainer{
+						{
+							Container:   containerJSON1,
+							ServiceSpec: serviceSpecJSON,
+						},
+					},
+				},
+				{
+					Metadata: &pb.Metadata{MachineAddr: "10.0.0.2", MachineName: "machine-2"},
+					Containers: []*pb.ServiceContainer{
+						{
+							Container:   containerJSON2,
+							ServiceSpec: serviceSpecJSON,
+						},
+					},
+				},
+			},
+		},
+	}
+
+	cli := &client.Client{
+		Docker: &docker.Client{GRPCClient: mockDocker},
+	}
+
+	containers, err := collectContainers(context.Background(), cli)
+	require.NoError(t, err)
+
+	assert.Len(t, containers, 2)
+	for _, c := range containers {
+		if c.id == "container1" {
+			assert.Equal(t, "machine-1", c.machineName)
+		} else if c.id == "container2" {
+			assert.Equal(t, "machine-2", c.machineName)
+		} else {
+			t.Errorf("unexpected container id: %s", c.id)
+		}
+	}
+}

cmd/uc/service/exec.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/docker/cli/cli/streams"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
@@ -55,6 +56,13 @@ If the service has multiple replicas and no container ID is specified, the comma
 			return runExec(cmd.Context(), uncli, serviceName, command, opts)
 		},
 		GroupID: groupID,
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	execCmd.Flags().BoolVarP(&opts.detach, "detach", "d", false, "Detached mode: run command in the background")

cmd/uc/service/inspect.go

@@ -6,9 +6,11 @@ import (
 	"slices"
 	"time"
 
+	"charm.land/lipgloss/v2"
 	"github.com/docker/docker/pkg/stringid"
 	"github.com/docker/go-units"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
@@ -30,6 +32,13 @@ func NewInspectCommand(groupID string) *cobra.Command {
 			return inspect(cmd.Context(), uncli, opts)
 		},
 		GroupID: groupID,
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 	return cmd
 }
@@ -46,15 +55,6 @@ func inspect(ctx context.Context, uncli *cli.CLI, opts inspectOptions) error {
 		return fmt.Errorf("inspect service: %w", err)
 	}
 
-	machines, err := client.ListMachines(ctx, nil)
-	if err != nil {
-		return fmt.Errorf("list machines: %w", err)
-	}
-	machinesNamesByID := make(map[string]string)
-	for _, m := range machines {
-		machinesNamesByID[m.Machine.Id] = m.Machine.Name
-	}
-
 	fmt.Printf("Service ID: %s\n", svc.ID)
 	fmt.Printf("Name:       %s\n", svc.Name)
 	fmt.Printf("Mode:       %s\n", svc.Mode)
@@ -89,7 +89,7 @@ func inspect(ctx context.Context, uncli *cli.CLI, opts inspectOptions) error {
 	for _, ctr := range allContainers {
 		created := units.HumanDuration(now.Sub(createdTimes[ctr.Container.ID])) + " ago"
 
-		machine := machinesNamesByID[ctr.MachineID]
+		machine := ctr.MachineName
 		if machine == "" {
 			machine = ctr.MachineID
 		}
@@ -127,6 +127,6 @@ func inspect(ctx context.Context, uncli *cli.CLI, opts inspectOptions) error {
 		}
 	}
 
-	fmt.Println(t)
+	lipgloss.Println(t)
 	return nil
 }

cmd/uc/service/logs.go

@@ -8,6 +8,7 @@ import (
 
 	mapset "github.com/deckarep/golang-set/v2"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/logs"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
@@ -58,19 +59,25 @@ If no services are specified, streams logs from all services defined in the Comp
   uc logs -m machine1,machine2 web api`,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
-			return runLogs(cmd.Context(), uncli, args, options)
+			return RunLogs(cmd.Context(), uncli, args, options)
 		},
 		GroupID: groupID,
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	cmd.Flags().StringSliceVar(&options.Files, "file", nil,
 		"One or more Compose files to load service names from when no services are specified. (default compose.yaml)")
 
 	cmd.Flags().AddFlagSet(logs.Flags(&options))
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 
-func runLogs(ctx context.Context, uncli *cli.CLI, args []string, opts logs.Options) error {
+func RunLogs(ctx context.Context, uncli *cli.CLI, args []string, opts logs.Options) error {
 	serviceArgs, err := logs.ParseServiceArgs(args)
 	if err != nil {
 		return err

cmd/uc/service/ls.go

@@ -6,6 +6,7 @@ import (
 	"slices"
 	"strings"
 
+	"charm.land/lipgloss/v2"
 	"github.com/psviderski/uncloud/internal/cli"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
@@ -82,6 +83,6 @@ func list(ctx context.Context, uncli *cli.CLI) error {
 		t.Row(row...)
 	}
 
-	fmt.Println(t)
+	lipgloss.Println(t)
 	return nil
 }

cmd/uc/service/rm.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/spf13/cobra"
 )
 
@@ -31,6 +32,10 @@ directives in image Dockerfiles) are automatically removed with their containers
 			return rm(cmd.Context(), uncli, opts)
 		},
 		GroupID: groupID,
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 	return cmd
 }

cmd/uc/service/run.go

@@ -11,6 +11,7 @@ import (
 	"github.com/docker/docker/daemon/names"
 	"github.com/docker/go-units"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/secret"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/psviderski/uncloud/pkg/client/deploy"
@@ -92,7 +93,7 @@ func NewRunCommand(groupID string) *cobra.Command {
 		"Give extended privileges to service containers. This is a security risk and should be used with caution.")
 	cmd.Flags().StringSliceVarP(&opts.publish, "publish", "p", nil,
 		"Publish a service port to make it accessible outside the cluster. Can be specified multiple times.\n"+
-			"Format: [hostname:]container_port[/protocol] or [host_ip:]host_port:container_port[/protocol]@host\n"+
+			"Format: [hostname:]container_port[/protocol] or [host_ip|host_prefix:]host_port:container_port[/protocol]@host\n"+
 			"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"+
@@ -100,7 +101,9 @@ func NewRunCommand(groupID string) *cobra.Command {
 			"  -p app.example.com:8080/https       Publish port 8080 as HTTPS via reverse proxy with custom hostname\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")
+			"  -p 53:5353/udp@host                 Bind UDP port 5353 to host port 53\n"+
+			"  -p 192.168.76.0/24:53:5353/udp@host Bind UDP port 5353 to host port 53 on every host IP address\n"+
+			"                                      contained in the prefix 192.168.76.0/24")
 	cmd.Flags().StringVar(&opts.pull, "pull", api.PullPolicyMissing,
 		fmt.Sprintf("Pull image from the registry before running service containers ('%s', '%s', '%s').",
 			api.PullPolicyAlways, api.PullPolicyMissing, api.PullPolicyNever))
@@ -124,6 +127,8 @@ func NewRunCommand(groupID string) *cobra.Command {
 			"  -v /data/uploads:/app/uploads         	 Bind mount /data/uploads host directory to /app/uploads in container\n"+
 			"  -v /host/path:/container/path:ro 		 Bind mount a host directory or file as read-only")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uc/service/scale.go

@@ -11,6 +11,7 @@ import (
 	"charm.land/lipgloss/v2"
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
@@ -29,9 +30,11 @@ func NewScaleCommand(groupID string) *cobra.Command {
 		Short: "Scale a replicated service by changing the number of replicas.",
 		Long:  "Scale a replicated service by changing the number of replicas.",
 		Args:  cobra.ExactArgs(2),
-		RunE: func(cmd *cobra.Command, args []string) error {
+		PreRunE: func(cmd *cobra.Command, args []string) error {
 			cli.BindEnvToFlag(cmd, "yes", "UNCLOUD_AUTO_CONFIRM")
-
+			return nil
+		},
+		RunE: func(cmd *cobra.Command, args []string) error {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 
 			opts.service = args[0]
@@ -44,6 +47,13 @@ func NewScaleCommand(groupID string) *cobra.Command {
 			return scale(cmd.Context(), uncli, opts)
 		},
 		GroupID: groupID,
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	cmd.Flags().BoolVarP(&opts.yes, "yes", "y", false,
@@ -128,7 +138,7 @@ func scale(ctx context.Context, uncli *cli.CLI, opts scaleOptions) error {
 
 	// Ask for confirmation unless auto-confirmed with --yes.
 	if !opts.yes {
-		if !tui.IsStdinTerminal() {
+		if !tui.IsTerminalAvailable() {
 			return errors.New("cannot ask to confirm scaling plan in non-interactive mode, " +
 				"use --yes flag or set UNCLOUD_AUTO_CONFIRM=true to auto-confirm")
 		}
@@ -147,8 +157,7 @@ func scale(ctx context.Context, uncli *cli.CLI, opts scaleOptions) error {
 			return fmt.Errorf("confirm scaling: %w", err)
 		}
 		if !confirmed {
-			fmt.Println("Cancelled. No changes were made.")
-			return nil
+			return cli.Cancelled("Scaling cancelled. No changes were made.")
 		}
 	}
 

cmd/uc/service/start.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/spf13/cobra"
 )
 
@@ -30,6 +31,10 @@ Services can be specified by name or ID.`,
 			return start(cmd.Context(), uncli, opts)
 		},
 		GroupID: groupID,
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 	return cmd
 }

cmd/uc/service/stop.go

@@ -8,6 +8,7 @@ import (
 	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/docker/docker/api/types/container"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/spf13/cobra"
 )
 
@@ -33,6 +34,10 @@ Services can be specified by name or ID. Stopped services can be restarted with
 			return stop(cmd.Context(), uncli, opts)
 		},
 		GroupID: groupID,
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Services(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 	cmd.Flags().StringVarP(&opts.signal, "signal", "s", "",
 		"Signal to send to each container's main process.\n"+

cmd/uc/version.go

@@ -0,0 +1,82 @@
+package main
+
+import (
+	"bytes"
+	_ "embed"
+	"fmt"
+	"strings"
+	"text/template"
+
+	"github.com/psviderski/uncloud/internal/cli/tui"
+	"github.com/psviderski/uncloud/internal/version"
+	"github.com/spf13/cobra"
+)
+
+//go:embed art.txt
+var asciiArt string
+
+// NewVersionCommand creates a new command to print the version and build information for the binary.
+func NewVersionCommand() *cobra.Command {
+	var output string
+
+	cmd := &cobra.Command{
+		Use:   "version",
+		Short: "Show version and build information.",
+		Args:  cobra.NoArgs,
+		RunE: func(cmd *cobra.Command, _ []string) error {
+			info := version.GetInfo()
+			w := cmd.OutOrStdout()
+
+			switch output {
+			case "":
+				fmt.Fprint(w, humanVersion(info))
+			case "json":
+				s, err := info.JSONString()
+				if err != nil {
+					return err
+				}
+				fmt.Fprintln(w, s)
+			default:
+				s, err := templateVersion(output, info)
+				if err != nil {
+					return err
+				}
+				fmt.Fprint(w, s)
+			}
+
+			return nil
+		},
+	}
+
+	cmd.Flags().StringVarP(&output, "output", "o", "",
+		"Output format: 'json' or a Go template (e.g. '{{.Version}}').\n"+
+			"Run with '-o json' to discover the field names available to the template.\n"+
+			"(default is human-readable)")
+
+	return cmd
+}
+
+func humanVersion(info version.Info) string {
+	var b strings.Builder
+	b.WriteString(asciiArt)
+	b.WriteString("\n")
+	b.WriteString(fmt.Sprintf("uc: Uncloud CLI tool for deploying apps and managing resources (%s)",
+		tui.URLStyle.Render(version.WebsiteURL)))
+	b.WriteString("\n\n")
+	b.WriteString(info.String())
+	return b.String()
+}
+
+// templateVersion renders the version info using the provided Go template.
+func templateVersion(tmpl string, info version.Info) (string, error) {
+	t, err := template.New("version").Parse(tmpl)
+	if err != nil {
+		return "", fmt.Errorf("parse template: %w", err)
+	}
+
+	var buf bytes.Buffer
+	if err = t.Execute(&buf, info); err != nil {
+		return "", fmt.Errorf("execute template: %w", err)
+	}
+	return buf.String(), nil
+}

cmd/uc/volume/create.go

@@ -9,6 +9,7 @@ import (
 	"charm.land/huh/v2"
 	"github.com/docker/docker/api/types/volume"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
@@ -50,6 +51,8 @@ func NewCreateCommand() *cobra.Command {
 	cmd.Flags().StringVarP(&opts.machine, "machine", "m", "",
 		"Name or ID of the machine to create the volume on.")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uc/volume/inspect.go

@@ -7,6 +7,7 @@ import (
 	"fmt"
 
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
 )
@@ -26,12 +27,21 @@ func NewInspectCommand() *cobra.Command {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 			return inspect(cmd.Context(), uncli, args[0], opts)
 		},
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Volumes(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	cmd.Flags().StringVarP(&opts.machine, "machine", "m", "",
 		"Name or ID of the machine where the volume is located. "+
 			"If not specified, the volume will be searched across all machines.")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 

cmd/uc/volume/ls.go

@@ -6,7 +6,9 @@ import (
 	"slices"
 	"strings"
 
+	"charm.land/lipgloss/v2"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
@@ -36,6 +38,8 @@ func NewListCommand() *cobra.Command {
 	cmd.Flags().BoolVarP(&opts.quiet, "quiet", "q", false,
 		"Only display volume names.")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 
@@ -92,6 +96,6 @@ func list(ctx context.Context, uncli *cli.CLI, opts listOptions) error {
 		t.Row(v.Volume.Name, v.Volume.Driver, v.MachineName)
 	}
 
-	fmt.Println(t)
+	lipgloss.Println(t)
 	return nil
 }

cmd/uc/volume/rm.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/spf13/cobra"
@@ -30,6 +31,10 @@ func NewRemoveCommand() *cobra.Command {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
 			return remove(cmd.Context(), uncli, args, opts)
 		},
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return completion.Volumes(cmd.Context(), uncli, args, toComplete)
+		},
 	}
 
 	cmd.Flags().BoolVarP(&opts.force, "force", "f", false,
@@ -41,6 +46,8 @@ func NewRemoveCommand() *cobra.Command {
 	cmd.Flags().BoolVarP(&opts.yes, "yes", "y", false,
 		"Do not prompt for confirmation before removing the volume(s).")
 
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 
@@ -85,8 +92,7 @@ func remove(ctx context.Context, uncli *cli.CLI, names []string, opts removeOpti
 			return fmt.Errorf("confirm removal: %w", err)
 		}
 		if !confirmed {
-			fmt.Println("Cancelled. No volumes were removed.")
-			return nil
+			return cli.Cancelled("Cancelled. No volumes were removed.")
 		}
 	}
 

cmd/uc/wg/wg.go

@@ -6,8 +6,10 @@ import (
 	"strings"
 	"time"
 
+	"charm.land/lipgloss/v2"
 	"github.com/docker/go-units"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/internal/cli/completion"
 	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
 	"github.com/spf13/cobra"
@@ -44,6 +46,9 @@ func newShowCommand() *cobra.Command {
 	}
 	cmd.Flags().StringVarP(&opts.machine, "machine", "m", "",
 		"Name or ID of the machine to show the configuration for. (default is connected machine)")
+
+	completion.MachinesFlag(cmd)
+
 	return cmd
 }
 
@@ -56,10 +61,7 @@ func runShow(ctx context.Context, uncli *cli.CLI, opts showOptions) error {
 
 	if opts.machine != "" {
 		// Proxy requests to the specified machine.
-		ctx, _, err = client.ProxyMachinesContext(ctx, []string{opts.machine})
-		if err != nil {
-			return err
-		}
+		ctx = client.ProxySingleMachineContext(ctx, opts.machine)
 	}
 
 	resp, err := client.MachineClient.InspectWireGuardNetwork(ctx, nil)
@@ -132,6 +134,6 @@ func runShow(ctx context.Context, uncli *cli.CLI, opts showOptions) error {
 		)
 	}
 
-	fmt.Println(t)
+	lipgloss.Println(t)
 	return nil
 }

cmd/ucind/cluster/remove.go

@@ -4,6 +4,7 @@ import (
 	"fmt"
 
 	"github.com/psviderski/uncloud/internal/ucind"
+	"github.com/psviderski/uncloud/internal/ucind/completion"
 	"github.com/spf13/cobra"
 )
 
@@ -11,6 +12,7 @@ func NewRemoveCommand() *cobra.Command {
 	cmd := &cobra.Command{
 		Use:     "rm [NAME]",
 		Short:   "Remove a cluster.",
+		Aliases: []string{"remove", "delete"},
 		Args:    cobra.MaximumNArgs(1),
 		RunE: func(cmd *cobra.Command, args []string) error {
 			p := cmd.Context().Value("provisioner").(*ucind.Provisioner)
@@ -26,6 +28,12 @@ func NewRemoveCommand() *cobra.Command {
 			fmt.Printf("Cluster '%s' removed.\n", name)
 			return nil
 		},
+		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			if len(args) > 0 {
+				return nil, cobra.ShellCompDirectiveNoFileComp
+			}
+			return completion.Clusters(cmd, args, toComplete)
+		},
 	}
 	return cmd
 }

cmd/uncloud/ps_test.go

@@ -1,441 +0,0 @@
-package main
-
-import (
-	"context"
-	"encoding/json"
-	"net/netip"
-	"testing"
-
-	"github.com/psviderski/uncloud/internal/machine/api/pb"
-	"github.com/psviderski/uncloud/internal/machine/docker"
-	"github.com/psviderski/uncloud/pkg/client"
-	"github.com/stretchr/testify/assert"
-	"github.com/stretchr/testify/require"
-	"google.golang.org/grpc"
-	"google.golang.org/protobuf/types/known/emptypb"
-)
-
-// mockDockerClient implements pb.DockerClient
-type mockDockerClient struct {
-	pb.DockerClient // Embed to avoid implementing all methods
-	listResp        *pb.ListServiceContainersResponse
-	listErr         error
-}
-
-func (m *mockDockerClient) ListServiceContainers(ctx context.Context, in *pb.ListServiceContainersRequest, opts ...grpc.CallOption) (*pb.ListServiceContainersResponse, error) {
-	return m.listResp, m.listErr
-}
-
-// mockClusterClient implements pb.ClusterClient
-type mockClusterClient struct {
-	pb.ClusterClient // Embed to avoid implementing all methods
-	machinesResp     *pb.ListMachinesResponse
-	machinesErr      error
-}
-
-func (m *mockClusterClient) ListMachines(ctx context.Context, in *emptypb.Empty, opts ...grpc.CallOption) (*pb.ListMachinesResponse, error) {
-	return m.machinesResp, m.machinesErr
-}
-
-func TestCollectContainers_NilMetadata(t *testing.T) {
-	// Setup container data
-	containerData := map[string]any{
-		"Id":   "container1",
-		"Name": "test-container",
-		"Config": map[string]any{
-			"Image": "test-image",
-		},
-		"State": map[string]any{
-			"Status":     "running",
-			"StartedAt":  "2023-01-01T12:00:00Z",
-			"FinishedAt": "0001-01-01T00:00:00Z",
-		},
-		"NetworkSettings": map[string]any{
-			"Networks": map[string]any{},
-		},
-	}
-	containerJSON, err := json.Marshal(containerData)
-	require.NoError(t, err)
-
-	serviceSpecJSON, err := json.Marshal(map[string]any{})
-	require.NoError(t, err)
-
-	// Setup mocks
-	mockDocker := &mockDockerClient{
-		listResp: &pb.ListServiceContainersResponse{
-			Messages: []*pb.MachineServiceContainers{
-				{
-					Metadata: nil, // Simulating the issue: nil metadata
-					Containers: []*pb.ServiceContainer{
-						{
-							Container:   containerJSON,
-							ServiceSpec: serviceSpecJSON,
-						},
-					},
-				},
-			},
-		},
-	}
-
-	machineIP := "10.0.0.1"
-	mockCluster := &mockClusterClient{
-		machinesResp: &pb.ListMachinesResponse{
-			Machines: []*pb.MachineMember{
-				{
-					Machine: &pb.MachineInfo{
-						Name: "machine-1",
-						Network: &pb.NetworkConfig{
-							ManagementIp: pb.NewIP(netip.MustParseAddr(machineIP)),
-						},
-					},
-					State: pb.MachineMember_UP,
-				},
-			},
-		},
-	}
-
-	// Construct client with mocks
-	cli := &client.Client{
-		Docker: &docker.Client{
-			GRPCClient: mockDocker,
-		},
-		ClusterClient: mockCluster,
-	}
-
-	// Execute
-	containers, err := collectContainers(context.Background(), cli)
-	require.NoError(t, err)
-
-	// Verify
-	assert.Len(t, containers, 1)
-	if len(containers) > 0 {
-		c := containers[0]
-		assert.Equal(t, "container1", c.id)
-		assert.Equal(t, "machine-1", c.machineName, "Should fall back to the single machine name when metadata is nil")
-	}
-}
-
-func TestCollectContainers_NilMetadata_MultipleMachines_Error(t *testing.T) {
-	// If we have multiple machines but receive nil metadata, it should return an error as it is ambiguous
-
-	// Setup container data
-	containerData1 := map[string]any{
-		"Id": "container1",
-	}
-	containerJSON1, _ := json.Marshal(containerData1)
-
-	containerData2 := map[string]any{
-		"Id": "container2",
-		"Config": map[string]any{
-			"Image": "test-image",
-		},
-		"State": map[string]any{
-			"Status":     "running",
-			"StartedAt":  "2023-01-01T12:00:00Z",
-			"FinishedAt": "0001-01-01T00:00:00Z",
-		},
-		"NetworkSettings": map[string]any{
-			"Networks": map[string]any{},
-		},
-	}
-	containerJSON2, _ := json.Marshal(containerData2)
-
-	serviceSpecJSON, _ := json.Marshal(map[string]any{})
-
-	// Setup mocks
-	mockDocker := &mockDockerClient{
-		listResp: &pb.ListServiceContainersResponse{
-			Messages: []*pb.MachineServiceContainers{
-				{
-					Metadata: nil, // Nil metadata
-					Containers: []*pb.ServiceContainer{
-						{
-							Container:   containerJSON1,
-							ServiceSpec: serviceSpecJSON,
-						},
-					},
-				},
-				{
-					Metadata: &pb.Metadata{Machine: "10.0.0.2"},
-					Containers: []*pb.ServiceContainer{
-						{
-							Container:   containerJSON2,
-							ServiceSpec: serviceSpecJSON,
-						},
-					},
-				},
-			},
-		},
-	}
-
-	mockCluster := &mockClusterClient{
-		machinesResp: &pb.ListMachinesResponse{
-			Machines: []*pb.MachineMember{
-				{
-					Machine: &pb.MachineInfo{
-						Name: "machine-1",
-						Network: &pb.NetworkConfig{
-							ManagementIp: pb.NewIP(netip.MustParseAddr("10.0.0.1")),
-						},
-					},
-				},
-				{
-					Machine: &pb.MachineInfo{
-						Name: "machine-2",
-						Network: &pb.NetworkConfig{
-							ManagementIp: pb.NewIP(netip.MustParseAddr("10.0.0.2")),
-						},
-					},
-				},
-			},
-		},
-	}
-
-	// Construct client with mocks
-	cli := &client.Client{
-		Docker: &docker.Client{
-			GRPCClient: mockDocker,
-		},
-		ClusterClient: mockCluster,
-	}
-
-	// Execute
-	_, err := collectContainers(context.Background(), cli)
-	require.Error(t, err)
-	assert.Contains(t, err.Error(), "metadata is missing for a machine response")
-}
-
-func TestCollectContainers_MetadataPresent_MultipleMachines(t *testing.T) {
-	// Verify correct mapping of containers to machines when metadata is present
-
-	// Setup container data
-	containerData1 := map[string]any{
-		"Id":   "container1",
-		"Name": "container-1",
-		"Config": map[string]any{
-			"Image": "image-1",
-		},
-		"State": map[string]any{
-			"Status":     "running",
-			"StartedAt":  "2023-01-01T12:00:00Z",
-			"FinishedAt": "0001-01-01T00:00:00Z",
-		},
-		"NetworkSettings": map[string]any{
-			"Networks": map[string]any{},
-		},
-	}
-	containerJSON1, _ := json.Marshal(containerData1)
-
-	containerData2 := map[string]any{
-		"Id":   "container2",
-		"Name": "container-2",
-		"Config": map[string]any{
-			"Image": "image-2",
-		},
-		"State": map[string]any{
-			"Status":     "running",
-			"StartedAt":  "2023-01-01T12:00:00Z",
-			"FinishedAt": "0001-01-01T00:00:00Z",
-		},
-		"NetworkSettings": map[string]any{
-			"Networks": map[string]any{},
-		},
-	}
-	containerJSON2, _ := json.Marshal(containerData2)
-
-	serviceSpecJSON, _ := json.Marshal(map[string]any{})
-
-	// Setup mocks
-	mockDocker := &mockDockerClient{
-		listResp: &pb.ListServiceContainersResponse{
-			Messages: []*pb.MachineServiceContainers{
-				{
-					Metadata: &pb.Metadata{Machine: "10.0.0.1"},
-					Containers: []*pb.ServiceContainer{
-						{
-							Container:   containerJSON1,
-							ServiceSpec: serviceSpecJSON,
-						},
-					},
-				},
-				{
-					Metadata: &pb.Metadata{Machine: "10.0.0.2"},
-					Containers: []*pb.ServiceContainer{
-						{
-							Container:   containerJSON2,
-							ServiceSpec: serviceSpecJSON,
-						},
-					},
-				},
-			},
-		},
-	}
-
-	mockCluster := &mockClusterClient{
-		machinesResp: &pb.ListMachinesResponse{
-			Machines: []*pb.MachineMember{
-				{
-					Machine: &pb.MachineInfo{
-						Name: "machine-1",
-						Network: &pb.NetworkConfig{
-							ManagementIp: pb.NewIP(netip.MustParseAddr("10.0.0.1")),
-						},
-					},
-				},
-				{
-					Machine: &pb.MachineInfo{
-						Name: "machine-2",
-						Network: &pb.NetworkConfig{
-							ManagementIp: pb.NewIP(netip.MustParseAddr("10.0.0.2")),
-						},
-					},
-				},
-			},
-		},
-	}
-
-	cli := &client.Client{
-		Docker:        &docker.Client{GRPCClient: mockDocker},
-		ClusterClient: mockCluster,
-	}
-
-	containers, err := collectContainers(context.Background(), cli)
-	require.NoError(t, err)
-
-	assert.Len(t, containers, 2)
-	// Order is not guaranteed by the map iteration in logic or parallel fetch (though here it's mocked sequential),
-	// but collectContainers just appends.
-	// We'll find them by ID.
-	for _, c := range containers {
-		if c.id == "container1" {
-			assert.Equal(t, "machine-1", c.machineName)
-		} else if c.id == "container2" {
-			assert.Equal(t, "machine-2", c.machineName)
-		} else {
-			t.Errorf("unexpected container id: %s", c.id)
-		}
-	}
-}
-
-func TestCollectContainers_NilMetadata_NoMachines(t *testing.T) {
-	// Case: 1 msc with nil metadata but no machines at all
-
-	containerData := map[string]any{
-		"Id": "container1",
-		"Config": map[string]any{
-			"Image": "test-image",
-		},
-		"State": map[string]any{
-			"Status":     "running",
-			"StartedAt":  "2023-01-01T12:00:00Z",
-			"FinishedAt": "0001-01-01T00:00:00Z",
-		},
-		"NetworkSettings": map[string]any{
-			"Networks": map[string]any{},
-		},
-	}
-	containerJSON, _ := json.Marshal(containerData)
-	serviceSpecJSON, _ := json.Marshal(map[string]any{})
-
-	mockDocker := &mockDockerClient{
-		listResp: &pb.ListServiceContainersResponse{
-			Messages: []*pb.MachineServiceContainers{
-				{
-					Metadata: nil,
-					Containers: []*pb.ServiceContainer{
-						{
-							Container:   containerJSON,
-							ServiceSpec: serviceSpecJSON,
-						},
-					},
-				},
-			},
-		},
-	}
-
-	// No machines in cluster response
-	mockCluster := &mockClusterClient{
-		machinesResp: &pb.ListMachinesResponse{
-			Machines: []*pb.MachineMember{},
-		},
-	}
-
-	cli := &client.Client{
-		Docker:        &docker.Client{GRPCClient: mockDocker},
-		ClusterClient: mockCluster,
-	}
-
-	containers, err := collectContainers(context.Background(), cli)
-	require.NoError(t, err)
-
-	assert.Len(t, containers, 1)
-	if len(containers) > 0 {
-		assert.Equal(t, "unknown", containers[0].machineName)
-	}
-}
-
-func TestCollectContainers_MetadataPresent_NotInMapping(t *testing.T) {
-	// Case: msc with metadata that is not in the IP-to-name mapping
-
-	containerData := map[string]any{
-		"Id": "container1",
-		"Config": map[string]any{
-			"Image": "test-image",
-		},
-		"State": map[string]any{
-			"Status":     "running",
-			"StartedAt":  "2023-01-01T12:00:00Z",
-			"FinishedAt": "0001-01-01T00:00:00Z",
-		},
-		"NetworkSettings": map[string]any{
-			"Networks": map[string]any{},
-		},
-	}
-	containerJSON, _ := json.Marshal(containerData)
-	serviceSpecJSON, _ := json.Marshal(map[string]any{})
-
-	mockDocker := &mockDockerClient{
-		listResp: &pb.ListServiceContainersResponse{
-			Messages: []*pb.MachineServiceContainers{
-				{
-					Metadata: &pb.Metadata{Machine: "10.0.0.99"}, // Unknown IP
-					Containers: []*pb.ServiceContainer{
-						{
-							Container:   containerJSON,
-							ServiceSpec: serviceSpecJSON,
-						},
-					},
-				},
-			},
-		},
-	}
-
-	mockCluster := &mockClusterClient{
-		machinesResp: &pb.ListMachinesResponse{
-			Machines: []*pb.MachineMember{
-				{
-					Machine: &pb.MachineInfo{
-						Name: "machine-1",
-						Network: &pb.NetworkConfig{
-							ManagementIp: pb.NewIP(netip.MustParseAddr("10.0.0.1")),
-						},
-					},
-				},
-			},
-		},
-	}
-
-	cli := &client.Client{
-		Docker:        &docker.Client{GRPCClient: mockDocker},
-		ClusterClient: mockCluster,
-	}
-
-	containers, err := collectContainers(context.Background(), cli)
-	require.NoError(t, err)
-
-	assert.Len(t, containers, 1)
-	if len(containers) > 0 {
-		// Should fallback to the IP/string in metadata
-		assert.Equal(t, "10.0.0.99", containers[0].machineName)
-	}
-}

cmd/uncloudd/art.txt

@@ -0,0 +1,5 @@
+                  _                 _     _
+ _   _ _ __   ___| | ___  _   _  __| | __| |
+| | | | '_ \ / __| |/ _ \| | | |/ _` |/ _` |
+| |_| | | | | (__| | (_) | |_| | (_| | (_| |
+ \__,_|_| |_|\___|_|\___/ \__,_|\__,_|\__,_|

cmd/uncloudd/main.go

@@ -7,9 +7,11 @@ import (
 	"os/signal"
 	"syscall"
 
+	"github.com/psviderski/uncloud/internal/cli/tui"
 	"github.com/psviderski/uncloud/internal/daemon"
 	"github.com/psviderski/uncloud/internal/log"
 	"github.com/psviderski/uncloud/internal/machine"
+	"github.com/psviderski/uncloud/internal/metrics"
 	"github.com/psviderski/uncloud/internal/version"
 	"github.com/spf13/cobra"
 )
@@ -24,7 +26,7 @@ func main() {
 	cmd := &cobra.Command{
 		Use:           "uncloudd",
 		Short:         "Uncloud machine daemon.",
-		Version:       version.String(),
+		Long:          "Uncloud machine daemon.\n" + tui.URLStyle.Render(version.WebsiteURL),
 		SilenceUsage:  true,
 		SilenceErrors: true,
 		RunE: func(cmd *cobra.Command, args []string) error {
@@ -39,11 +41,13 @@ func main() {
 		},
 	}
 	cmd.PersistentFlags().StringVarP(&dataDir, "data-dir", "d", machine.DefaultDataDir,
-		"Directory for storing persistent machine state")
+		"Directory for storing persistent machine state.")
 	_ = cmd.MarkFlagDirname("data-dir")
 
-	// Add dial-stdio subcommand.
 	cmd.AddCommand(newDialStdioCommand())
+	cmd.AddCommand(newVersionCommand())
+
+	metrics.Version.WithLabelValues(version.String()).Set(1)
 
 	// ctx is canceled when the daemon command is interrupted.
 	ctx, cancel := context.WithCancel(context.Background())

cmd/uncloudd/version.go

@@ -0,0 +1,82 @@
+package main
+
+import (
+	"bytes"
+	_ "embed"
+	"fmt"
+	"strings"
+	"text/template"
+
+	"github.com/psviderski/uncloud/internal/cli/tui"
+	"github.com/psviderski/uncloud/internal/version"
+	"github.com/spf13/cobra"
+)
+
+//go:embed art.txt
+var asciiArt string
+
+// newVersionCommand creates a new command to print the version and build information for the binary.
+func newVersionCommand() *cobra.Command {
+	var output string
+
+	cmd := &cobra.Command{
+		Use:   "version",
+		Short: "Show version and build information.",
+		Args:  cobra.NoArgs,
+		RunE: func(cmd *cobra.Command, _ []string) error {
+			info := version.GetInfo()
+			w := cmd.OutOrStdout()
+
+			switch output {
+			case "":
+				fmt.Fprint(w, humanVersion(info))
+			case "json":
+				s, err := info.JSONString()
+				if err != nil {
+					return err
+				}
+				fmt.Fprintln(w, s)
+			default:
+				s, err := templateVersion(output, info)
+				if err != nil {
+					return err
+				}
+				fmt.Fprint(w, s)
+			}
+
+			return nil
+		},
+	}
+
+	cmd.Flags().StringVarP(&output, "output", "o", "",
+		"Output format: 'json' or a Go template (e.g., '{{.Version}}').\n"+
+			"Run with '-o json' to discover the field names available to the template.\n"+
+			"(default is human-readable)")
+
+	return cmd
+}
+
+func humanVersion(info version.Info) string {
+	var b strings.Builder
+	b.WriteString(asciiArt)
+	b.WriteString("\n")
+	b.WriteString(fmt.Sprintf("uncloudd: Uncloud machine daemon (%s)",
+		tui.URLStyle.Render(version.WebsiteURL)))
+	b.WriteString("\n\n")
+	b.WriteString(info.String())
+	return b.String()
+}
+
+// templateVersion renders the version info using the provided Go template.
+func templateVersion(tmpl string, info version.Info) (string, error) {
+	t, err := template.New("version").Parse(tmpl)
+	if err != nil {
+		return "", fmt.Errorf("parse template: %w", err)
+	}
+
+	var buf bytes.Buffer
+	if err = t.Execute(&buf, info); err != nil {
+		return "", fmt.Errorf("execute template: %w", err)
+	}
+	return buf.String(), nil
+}

experiment/go.mod

@@ -124,8 +124,8 @@ require (
 	golang.org/x/exp v0.0.0-20250408133849-7e4ce0ab07d0 // indirect
 	golang.org/x/mod v0.27.0 // indirect
 	golang.org/x/net v0.43.0 // indirect
-	golang.org/x/sync v0.19.0 // indirect
-	golang.org/x/sys v0.42.0 // indirect
+	golang.org/x/sync v0.20.0 // indirect
+	golang.org/x/sys v0.45.0 // indirect
 	golang.org/x/text v0.28.0 // indirect
 	golang.org/x/tools v0.36.0 // indirect
 	golang.zx2c4.com/wireguard v0.0.0-20231211153847-12269c276173 // indirect

experiment/go.sum

@@ -660,8 +660,8 @@ golang.org/x/sync v0.0.0-20190911185100-cd5d95a43a6e/go.mod h1:RxMgew5VJxzue5/jJ
 golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 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 v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
-golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/sync v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
+golang.org/x/sync v0.20.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
 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=
@@ -694,8 +694,8 @@ golang.org/x/sys v0.0.0-20221010170243-090e33056c14/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.2.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.10.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
-golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
+golang.org/x/sys v0.45.0 h1:dO4czNzziLiiXplLQgBCEpCvXQ3dnkn0SdaZSYdQ+FY=
+golang.org/x/sys v0.45.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.2.0/go.mod h1:TVmDHMZPmdnySmBfhjOoOdhjzdE1h4u1VwSiw2l1Nuc=

experiment/netbird-load/go.mod

@@ -0,0 +1,132 @@
+module github.com/psviderski/uncloud/experiment/netbird-load
+
+go 1.26.1
+
+require github.com/netbirdio/netbird v0.71.0
+
+require (
+	cunicu.li/go-rosenpass v0.4.0 // indirect
+	github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be // indirect
+	github.com/aws/aws-sdk-go-v2 v1.38.3 // indirect
+	github.com/aws/aws-sdk-go-v2/config v1.31.6 // indirect
+	github.com/aws/aws-sdk-go-v2/credentials v1.18.10 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.6 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.6 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.6 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/ini v1.8.3 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.1 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.6 // indirect
+	github.com/aws/aws-sdk-go-v2/service/route53 v1.42.3 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.29.1 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.34.2 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sts v1.38.2 // indirect
+	github.com/aws/smithy-go v1.23.0 // indirect
+	github.com/caddyserver/certmagic v0.21.3 // indirect
+	github.com/caddyserver/zerossl v0.1.3 // indirect
+	github.com/cenkalti/backoff/v4 v4.3.0 // indirect
+	github.com/cilium/ebpf v0.15.0 // indirect
+	github.com/cloudflare/circl v1.3.3 // indirect
+	github.com/coder/websocket v1.8.14 // indirect
+	github.com/coreos/go-iptables v0.7.0 // indirect
+	github.com/creack/pty v1.1.24 // indirect
+	github.com/fsnotify/fsnotify v1.9.0 // indirect
+	github.com/gliderlabs/ssh v0.3.8 // indirect
+	github.com/go-ole/go-ole v1.3.0 // indirect
+	github.com/godbus/dbus/v5 v5.1.0 // indirect
+	github.com/golang-jwt/jwt/v5 v5.3.1 // indirect
+	github.com/golang/protobuf v1.5.4 // indirect
+	github.com/google/btree v1.1.2 // indirect
+	github.com/google/go-cmp v0.7.0 // indirect
+	github.com/google/gopacket v1.1.19 // indirect
+	github.com/google/nftables v0.3.0 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/gopacket/gopacket v1.1.1 // indirect
+	github.com/hashicorp/errwrap v1.1.0 // indirect
+	github.com/hashicorp/go-multierror v1.1.1 // indirect
+	github.com/hashicorp/go-version v1.7.0 // indirect
+	github.com/huin/goupnp v1.2.0 // indirect
+	github.com/jackpal/go-nat-pmp v1.0.2 // indirect
+	github.com/jmespath/go-jmespath v0.4.0 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.10 // indirect
+	github.com/koron/go-ssdp v0.0.4 // indirect
+	github.com/kr/fs v0.1.0 // indirect
+	github.com/libdns/libdns v0.2.2 // indirect
+	github.com/libdns/route53 v1.5.0 // indirect
+	github.com/libp2p/go-nat v0.2.0 // indirect
+	github.com/libp2p/go-netroute v0.4.0 // indirect
+	github.com/lrh3321/ipset-go v0.0.0-20250619021614-54a0a98ace81 // indirect
+	github.com/lufia/plan9stats v0.0.0-20240513124658-fba389f38bae // indirect
+	github.com/mdlayher/genetlink v1.3.2 // indirect
+	github.com/mdlayher/netlink v1.7.3-0.20250113171957-fbb4dce95f42 // indirect
+	github.com/mdlayher/socket v0.5.1 // indirect
+	github.com/mholt/acmez/v2 v2.0.1 // indirect
+	github.com/miekg/dns v1.1.72 // indirect
+	github.com/mitchellh/hashstructure/v2 v2.0.2 // indirect
+	github.com/petermattis/goid v0.0.0-20250303134427-723919f7f203 // indirect
+	github.com/pion/dtls/v2 v2.2.10 // indirect
+	github.com/pion/dtls/v3 v3.0.9 // indirect
+	github.com/pion/ice/v4 v4.0.0-00010101000000-000000000000 // indirect
+	github.com/pion/logging v0.2.4 // indirect
+	github.com/pion/mdns/v2 v2.0.7 // indirect
+	github.com/pion/randutil v0.1.0 // indirect
+	github.com/pion/stun/v2 v2.0.0 // indirect
+	github.com/pion/stun/v3 v3.1.0 // indirect
+	github.com/pion/transport/v2 v2.2.4 // indirect
+	github.com/pion/transport/v3 v3.1.1 // indirect
+	github.com/pion/turn/v3 v3.0.1 // indirect
+	github.com/pion/turn/v4 v4.1.1 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pkg/sftp v1.13.9 // indirect
+	github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 // indirect
+	github.com/quic-go/quic-go v0.55.0 // indirect
+	github.com/shirou/gopsutil/v3 v3.24.4 // indirect
+	github.com/shoenig/go-m1cpu v0.2.1 // indirect
+	github.com/sirupsen/logrus v1.9.4 // indirect
+	github.com/skratchdot/open-golang v0.0.0-20200116055534-eef842397966 // indirect
+	github.com/things-go/go-socks5 v0.0.4 // indirect
+	github.com/ti-mo/conntrack v0.5.1 // indirect
+	github.com/ti-mo/netfilter v0.5.2 // indirect
+	github.com/tklauser/go-sysconf v0.3.15 // indirect
+	github.com/tklauser/numcpus v0.10.0 // indirect
+	github.com/vishvananda/netlink v1.3.1 // indirect
+	github.com/vishvananda/netns v0.0.5 // indirect
+	github.com/wlynxg/anet v0.0.5 // indirect
+	github.com/yusufpapurcu/wmi v1.2.4 // indirect
+	github.com/zcalusic/sysinfo v1.1.3 // indirect
+	github.com/zeebo/blake3 v0.2.3 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	go.uber.org/zap v1.27.0 // indirect
+	golang.org/x/crypto v0.50.0 // indirect
+	golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b // indirect
+	golang.org/x/mod v0.34.0 // indirect
+	golang.org/x/net v0.53.0 // indirect
+	golang.org/x/oauth2 v0.36.0 // indirect
+	golang.org/x/sync v0.20.0 // indirect
+	golang.org/x/sys v0.43.0 // indirect
+	golang.org/x/text v0.36.0 // indirect
+	golang.org/x/time v0.15.0 // indirect
+	golang.org/x/tools v0.43.0 // indirect
+	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 // indirect
+	golang.zx2c4.com/wireguard v0.0.0-20230704135630-469159ecf7d1 // indirect
+	golang.zx2c4.com/wireguard/wgctrl v0.0.0-20230429144221-925a1e7659e6 // indirect
+	golang.zx2c4.com/wireguard/windows v0.5.3 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9 // indirect
+	google.golang.org/grpc v1.80.0 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
+	gopkg.in/natefinch/lumberjack.v2 v2.2.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	gvisor.dev/gvisor v0.0.0-20260219192049-0f2374377e89 // indirect
+)
+
+// Mirror the replace directives from netbird's own go.mod.
+// See https://github.com/netbirdio/netbird/blob/v0.71.0/go.mod.
+replace (
+	github.com/cloudflare/circl => codeberg.org/cunicu/circl v0.0.0-20230801113412-fec58fc7b5f6
+	github.com/dexidp/dex => github.com/netbirdio/dex v0.244.1-0.20260512110716-8d70ad8647c1
+	github.com/dexidp/dex/api/v2 => github.com/netbirdio/dex/api/v2 v2.0.0-20260512110716-8d70ad8647c1
+	github.com/getlantern/systray => github.com/netbirdio/systray v0.0.0-20231030152038-ef1ed2a27949
+	github.com/kardianos/service => github.com/netbirdio/service v0.0.0-20240911161631-f62744f42502
+	github.com/mailru/easyjson => github.com/netbirdio/easyjson v0.9.0
+	github.com/pion/ice/v4 => github.com/netbirdio/ice/v4 v4.0.0-20250908184934-6202be846b51
+	golang.zx2c4.com/wireguard => github.com/netbirdio/wireguard-go v0.0.0-20260107100953-33b7c9d03db0
+)

experiment/netbird-load/go.sum

@@ -0,0 +1,675 @@
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+golang.zx2c4.com/wireguard/windows v0.5.3/go.mod h1:9TEe8TJmtwyQebdFwAkEWOPr3prrtqm+REGFifP60hI=
+gonum.org/v1/gonum v0.17.0 h1:VbpOemQlsSMrYmn7T2OUvQ4dqxQXU+ouZFQsZOx50z4=
+gonum.org/v1/gonum v0.17.0/go.mod h1:El3tOrEuMpv2UdMrbNlKEh9vd86bmQ6vqIcDwxEOc1E=
+google.golang.org/api v0.276.0 h1:nVArUtfLEihtW+b0DdcqRGK1xoEm2+ltAihyztq7MKY=
+google.golang.org/api v0.276.0/go.mod h1:Fnag/EWUPIcJXuIkP1pjoTgS5vdxlk3eeemL7Do6bvw=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9 h1:m8qni9SQFH0tJc1X0vmnpw/0t+AImlSvp30sEupozUg=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260401024825-9d38bb4040a9/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
+google.golang.org/grpc v1.80.0 h1:Xr6m2WmWZLETvUNvIUmeD5OAagMw3FiKmMlTdViWsHM=
+google.golang.org/grpc v1.80.0/go.mod h1:ho/dLnxwi3EDJA4Zghp7k2Ec1+c2jqup0bFkw07bwF4=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/ini.v1 v1.67.0 h1:Dgnx+6+nfE+IfzjUEISNeydPJh9AXNNsWbGP9KzCsOA=
+gopkg.in/ini.v1 v1.67.0/go.mod h1:pNLf8WUiyNEtQjuu5G5vTm06TEv9tsIgeAvK8hOrP4k=
+gopkg.in/natefinch/lumberjack.v2 v2.2.1 h1:bBRl1b0OH9s/DuPhuXpNl+VtCaJXFZ5/uEFST95x9zc=
+gopkg.in/natefinch/lumberjack.v2 v2.2.1/go.mod h1:YD8tP3GAjkrDg1eZH7EGmyESg/lsYskCTPBJVb9jqSc=
+gopkg.in/square/go-jose.v2 v2.6.0 h1:NGk74WTnPKBNUhNzQX7PYcTLUjoq7mzKk2OKbvwk2iI=
+gopkg.in/square/go-jose.v2 v2.6.0/go.mod h1:M9dMgbHiYLoDGQrXy7OpJDJWiKiU//h+vD76mk0e1AI=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
+gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gorm.io/driver/mysql v1.5.7 h1:MndhOPYOfEp2rHKgkZIhJ16eVUIRf2HmzgoPmh7FCWo=
+gorm.io/driver/mysql v1.5.7/go.mod h1:sEtPWMiqiN1N1cMXoXmBbd8C6/l+TESwriotuRRpkDM=
+gorm.io/driver/postgres v1.5.7 h1:8ptbNJTDbEmhdr62uReG5BGkdQyeasu/FZHxI0IMGnM=
+gorm.io/driver/postgres v1.5.7/go.mod h1:3e019WlBaYI5o5LIdNV+LyxCMNtLOQETBXL2h4chKpA=
+gorm.io/driver/sqlite v1.5.7 h1:8NvsrhP0ifM7LX9G4zPB97NwovUakUxc+2V2uuf3Z1I=
+gorm.io/driver/sqlite v1.5.7/go.mod h1:U+J8craQU6Fzkcvu8oLeAQmi50TkwPEhHDEjQZXDah4=
+gorm.io/gorm v1.25.12 h1:I0u8i2hWQItBq1WfE0o2+WuL9+8L21K9e2HHSTE/0f8=
+gorm.io/gorm v1.25.12/go.mod h1:xh7N7RHfYlNc5EmcI/El95gXusucDrQnHXe0+CgWcLQ=
+gvisor.dev/gvisor v0.0.0-20260219192049-0f2374377e89 h1:mGJaeA61P8dEHTqdvAgc70ZIV3QoUoJcXCRyyjO26OA=
+gvisor.dev/gvisor v0.0.0-20260219192049-0f2374377e89/go.mod h1:QkHjoMIBaYtpVufgwv3keYAbln78mBoCuShZrPrer1Q=

experiment/netbird-load/main.go

@@ -0,0 +1,134 @@
+// netbird-load launches N userspace NetBird nodes and has each one periodically
+// TCP-dial a peer to measure connect latency through the wireguard overlay.
+//
+// Usage:
+//
+//	NB_SETUP_KEY=nb-... go run . -count 10 -interval 5s -target 100.x.y.z:22
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"io"
+	"log"
+	"math/rand/v2"
+	"os"
+	"os/signal"
+	"path/filepath"
+	"sync"
+	"syscall"
+	"time"
+
+	"github.com/netbirdio/netbird/client/embed"
+)
+
+func main() {
+	setupKey := flag.String("setupkey", os.Getenv("NB_SETUP_KEY"),
+		"NetBird reusable setup key (or set NB_SETUP_KEY).")
+	mgmt := flag.String("mgmt", os.Getenv("NB_MGMT_URL"),
+		"NetBird management URL (empty = embed default, i.e. NetBird Cloud).")
+	count := flag.Int("count", 10, "Number of embedded netbird nodes to launch.")
+	interval := flag.Duration("interval", 5*time.Second, "Interval between actions per node.")
+	hostnamePrefix := flag.String("hostname-prefix", "uncloud", "Hostname prefix for netbird nodes.")
+	stateRoot := flag.String("state-dir", "./state", "Directory to keep netbird state (empty = a fresh temp dir).")
+	target := flag.String("target", "", "TCP host:port to dial each tick (required).")
+	flag.Parse()
+
+	if *setupKey == "" {
+		log.Fatal("missing NetBird setup key: pass -setupkey or set NB_SETUP_KEY.")
+	}
+	if *target == "" {
+		log.Fatal("missing -target: provide a TCP host:port reachable through the netbird network.")
+	}
+
+	root := *stateRoot
+	if root == "" {
+		var err error
+		root, err = os.MkdirTemp("", "netbird-load-*")
+		if err != nil {
+			log.Fatalf("mktemp: %v", err)
+		}
+		defer os.RemoveAll(root)
+	} else if err := os.MkdirAll(root, 0o700); err != nil {
+		log.Fatalf("mkdir state dir: %v", err)
+	}
+
+	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer stop()
+
+	var wg sync.WaitGroup
+	for i := 0; i < *count; i++ {
+		wg.Add(1)
+		go func(id int) {
+			defer wg.Done()
+			runNode(ctx, id, *setupKey, *mgmt, *hostnamePrefix, root, *target, *interval)
+		}(i)
+	}
+	wg.Wait()
+}
+
+func runNode(ctx context.Context, id int, setupKey, mgmt, prefix, stateRoot, target string, interval time.Duration) {
+	logPrefix := fmt.Sprintf("[node-%02d] ", id)
+	logger := log.New(os.Stderr, logPrefix, log.LstdFlags|log.Lmsgprefix)
+
+	nodeDir := filepath.Join(stateRoot, fmt.Sprintf("node-%02d", id))
+	deviceName := fmt.Sprintf("%s-%02d", prefix, id)
+
+	client, err := embed.New(embed.Options{
+		DeviceName:    deviceName,
+		SetupKey:      setupKey,
+		ManagementURL: mgmt,
+		StatePath:     nodeDir,
+		ConfigPath:    filepath.Join(nodeDir, "config"),
+		// Silence per-node netbird chatter. Swap to os.Stderr to debug.
+		LogOutput: io.Discard,
+		//NoUserspace: true,
+	})
+	if err != nil {
+		logger.Printf("netbird new: %v", err)
+		return
+	}
+	defer func() {
+		stopCtx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+		defer cancel()
+		_ = client.Stop(stopCtx)
+	}()
+
+	upCtx, cancel := context.WithTimeout(ctx, 60*time.Second)
+	defer cancel()
+	if err := client.Start(upCtx); err != nil {
+		logger.Printf("netbird start: %v", err)
+		return
+	}
+	logger.Printf("up as %s", deviceName)
+
+	// Stagger ticks so all nodes don't fire in lockstep.
+	time.Sleep(time.Duration(rand.Int64N(int64(interval))))
+
+	tick := time.NewTicker(interval)
+	defer tick.Stop()
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-tick.C:
+			doDial(ctx, client, target, logger)
+		}
+	}
+}
+
+func doDial(ctx context.Context, c *embed.Client, target string, logger *log.Logger) {
+	dctx, cancel := context.WithTimeout(ctx, 5*time.Second)
+	defer cancel()
+
+	start := time.Now()
+	conn, err := c.Dial(dctx, "tcp", target)
+	if err != nil {
+		logger.Printf("dial %s: %v", target, err)
+		return
+	}
+	latency := time.Since(start)
+	_ = conn.Close()
+	logger.Printf("dial %s ok in %.1fms", target, float64(latency.Microseconds())/1000)
+}

experiment/talos_discovery.go

@@ -81,7 +81,7 @@ func TestDiscovery() error {
 		}
 		endpoints[i] = &pb.Endpoint{
 			Ip:   ip,
-			Port: network.WireGuardPort,
+			Port: network.DefaultWireGuardPort,
 		}
 	}
 	if err = client.SetLocalData(

experiment/tsnet-load/go.mod

@@ -0,0 +1,66 @@
+module github.com/psviderski/uncloud/experiment/tsnet-load
+
+go 1.26.1
+
+require tailscale.com v1.96.5
+
+require (
+	filippo.io/edwards25519 v1.2.0 // indirect
+	github.com/akutz/memconn v0.1.0 // indirect
+	github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa // indirect
+	github.com/aws/aws-sdk-go-v2 v1.41.0 // indirect
+	github.com/aws/aws-sdk-go-v2/config v1.29.5 // indirect
+	github.com/aws/aws-sdk-go-v2/credentials v1.17.58 // indirect
+	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.27 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.16 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.16 // indirect
+	github.com/aws/aws-sdk-go-v2/internal/ini v1.8.2 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.4 // indirect
+	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.16 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sso v1.24.14 // indirect
+	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.28.13 // indirect
+	github.com/aws/aws-sdk-go-v2/service/sts v1.41.5 // indirect
+	github.com/aws/smithy-go v1.24.0 // indirect
+	github.com/coder/websocket v1.8.12 // indirect
+	github.com/creachadair/msync v0.7.1 // indirect
+	github.com/dblohm7/wingoes v0.0.0-20240119213807-a09d6be7affa // indirect
+	github.com/fxamacker/cbor/v2 v2.9.0 // indirect
+	github.com/gaissmai/bart v0.26.1 // indirect
+	github.com/go-json-experiment/json v0.0.0-20250813024750-ebf49471dced // indirect
+	github.com/godbus/dbus/v5 v5.1.1-0.20230522191255-76236955d466 // indirect
+	github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 // indirect
+	github.com/google/btree v1.1.3 // indirect
+	github.com/google/go-cmp v0.7.0 // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/hdevalence/ed25519consensus v0.2.0 // indirect
+	github.com/huin/goupnp v1.3.0 // indirect
+	github.com/jsimonetti/rtnetlink v1.4.0 // indirect
+	github.com/klauspost/compress v1.18.2 // indirect
+	github.com/mdlayher/netlink v1.7.3-0.20250113171957-fbb4dce95f42 // indirect
+	github.com/mdlayher/socket v0.5.0 // indirect
+	github.com/mitchellh/go-ps v1.0.0 // indirect
+	github.com/pires/go-proxyproto v0.8.1 // indirect
+	github.com/prometheus-community/pro-bing v0.4.0 // indirect
+	github.com/safchain/ethtool v0.3.0 // indirect
+	github.com/tailscale/certstore v0.1.1-0.20231202035212-d3fa0460f47e // indirect
+	github.com/tailscale/go-winio v0.0.0-20231025203758-c4f33415bf55 // indirect
+	github.com/tailscale/hujson v0.0.0-20221223112325-20486734a56a // indirect
+	github.com/tailscale/peercred v0.0.0-20250107143737-35a0c7bd7edc // indirect
+	github.com/tailscale/web-client-prebuilt v0.0.0-20250124233751-d4cd19a26976 // indirect
+	github.com/tailscale/wireguard-go v0.0.0-20250716170648-1d0488a3d7da // indirect
+	github.com/x448/float16 v0.8.4 // indirect
+	go4.org/mem v0.0.0-20240501181205-ae6ca9944745 // indirect
+	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba // indirect
+	golang.org/x/crypto v0.46.0 // indirect
+	golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b // indirect
+	golang.org/x/net v0.48.0 // indirect
+	golang.org/x/oauth2 v0.33.0 // indirect
+	golang.org/x/sync v0.19.0 // indirect
+	golang.org/x/sys v0.40.0 // indirect
+	golang.org/x/term v0.38.0 // indirect
+	golang.org/x/text v0.32.0 // indirect
+	golang.org/x/time v0.12.0 // indirect
+	golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 // indirect
+	golang.zx2c4.com/wireguard/windows v0.5.3 // indirect
+	gvisor.dev/gvisor v0.0.0-20260224225140-573d5e7127a8 // indirect
+)

experiment/tsnet-load/go.sum

@@ -0,0 +1,229 @@
+9fans.net/go v0.0.8-0.20250307142834-96bdba94b63f h1:1C7nZuxUMNz7eiQALRfiqNOm04+m3edWlRff/BYHf0Q=
+9fans.net/go v0.0.8-0.20250307142834-96bdba94b63f/go.mod h1:hHyrZRryGqVdqrknjq5OWDLGCTJ2NeEvtrpR96mjraM=
+filippo.io/edwards25519 v1.2.0 h1:crnVqOiS4jqYleHd9vaKZ+HKtHfllngJIiOpNpoJsjo=
+filippo.io/edwards25519 v1.2.0/go.mod h1:xzAOLCNug/yB62zG1bQ8uziwrIqIuxhctzJT18Q77mc=
+filippo.io/mkcert v1.4.4 h1:8eVbbwfVlaqUM7OwuftKc2nuYOoTDQWqsoXmzoXZdbc=
+filippo.io/mkcert v1.4.4/go.mod h1:VyvOchVuAye3BoUsPUOOofKygVwLV2KQMVFJNRq+1dA=
+github.com/BurntSushi/toml v1.5.0 h1:W5quZX/G/csjUnuI8SUYlsHs9M38FC7znL0lIO+DvMg=
+github.com/BurntSushi/toml v1.5.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
+github.com/akutz/memconn v0.1.0 h1:NawI0TORU4hcOMsMr11g7vwlCdkYeLKXBcxWu2W/P8A=
+github.com/akutz/memconn v0.1.0/go.mod h1:Jo8rI7m0NieZyLI5e2CDlRdRqRRB4S7Xp77ukDjH+Fw=
+github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa h1:LHTHcTQiSGT7VVbI0o4wBRNQIgn917usHWOd6VAffYI=
+github.com/alexbrainman/sspi v0.0.0-20231016080023-1a75b4708caa/go.mod h1:cEWa1LVoE5KvSD9ONXsZrj0z6KqySlCCNKHlLzbqAt4=
+github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8=
+github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
+github.com/aws/aws-sdk-go-v2 v1.41.0 h1:tNvqh1s+v0vFYdA1xq0aOJH+Y5cRyZ5upu6roPgPKd4=
+github.com/aws/aws-sdk-go-v2 v1.41.0/go.mod h1:MayyLB8y+buD9hZqkCW3kX1AKq07Y5pXxtgB+rRFhz0=
+github.com/aws/aws-sdk-go-v2/config v1.29.5 h1:4lS2IB+wwkj5J43Tq/AwvnscBerBJtQQ6YS7puzCI1k=
+github.com/aws/aws-sdk-go-v2/config v1.29.5/go.mod h1:SNzldMlDVbN6nWxM7XsUiNXPSa1LWlqiXtvh/1PrJGg=
+github.com/aws/aws-sdk-go-v2/credentials v1.17.58 h1:/d7FUpAPU8Lf2KUdjniQvfNdlMID0Sd9pS23FJ3SS9Y=
+github.com/aws/aws-sdk-go-v2/credentials v1.17.58/go.mod h1:aVYW33Ow10CyMQGFgC0ptMRIqJWvJ4nxZb0sUiuQT/A=
+github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.27 h1:7lOW8NUwE9UZekS1DYoiPdVAqZ6A+LheHWb+mHbNOq8=
+github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.27/go.mod h1:w1BASFIPOPUae7AgaH4SbjNbfdkxuggLyGfNFTn8ITY=
+github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.16 h1:rgGwPzb82iBYSvHMHXc8h9mRoOUBZIGFgKb9qniaZZc=
+github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.16/go.mod h1:L/UxsGeKpGoIj6DxfhOWHWQ/kGKcd4I1VncE4++IyKA=
+github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.16 h1:1jtGzuV7c82xnqOVfx2F0xmJcOw5374L7N6juGW6x6U=
+github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.16/go.mod h1:M2E5OQf+XLe+SZGmmpaI2yy+J326aFf6/+54PoxSANc=
+github.com/aws/aws-sdk-go-v2/internal/ini v1.8.2 h1:Pg9URiobXy85kgFev3og2CuOZ8JZUBENF+dcgWBaYNk=
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+github.com/tailscale/web-client-prebuilt v0.0.0-20250124233751-d4cd19a26976 h1:UBPHPtv8+nEAy2PD8RyAhOYvau1ek0HDJqLS/Pysi14=
+github.com/tailscale/web-client-prebuilt v0.0.0-20250124233751-d4cd19a26976/go.mod h1:agQPE6y6ldqCOui2gkIh7ZMztTkIQKH049tv8siLuNQ=
+github.com/tailscale/wf v0.0.0-20240214030419-6fbb0a674ee6 h1:l10Gi6w9jxvinoiq15g8OToDdASBni4CyJOdHY1Hr8M=
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+github.com/tailscale/wireguard-go v0.0.0-20250716170648-1d0488a3d7da h1:jVRUZPRs9sqyKlYHHzHjAqKN+6e/Vog6NpHYeNPJqOw=
+github.com/tailscale/wireguard-go v0.0.0-20250716170648-1d0488a3d7da/go.mod h1:BOm5fXUBFM+m9woLNBoxI9TaBXXhGNP50LX/TGIvGb4=
+github.com/tailscale/xnet v0.0.0-20240729143630-8497ac4dab2e h1:zOGKqN5D5hHhiYUp091JqK7DPCqSARyUfduhGUY8Bek=
+github.com/tailscale/xnet v0.0.0-20240729143630-8497ac4dab2e/go.mod h1:orPd6JZXXRyuDusYilywte7k094d7dycXXU5YnWsrwg=
+github.com/tc-hib/winres v0.2.1 h1:YDE0FiP0VmtRaDn7+aaChp1KiF4owBiJa5l964l5ujA=
+github.com/tc-hib/winres v0.2.1/go.mod h1:C/JaNhH3KBvhNKVbvdlDWkbMDO9H4fKKDaN7/07SSuk=
+github.com/u-root/u-root v0.14.0 h1:Ka4T10EEML7dQ5XDvO9c3MBN8z4nuSnGjcd1jmU2ivg=
+github.com/u-root/u-root v0.14.0/go.mod h1:hAyZorapJe4qzbLWlAkmSVCJGbfoU9Pu4jpJ1WMluqE=
+github.com/u-root/uio v0.0.0-20240224005618-d2acac8f3701 h1:pyC9PaHYZFgEKFdlp3G8RaCKgVpHZnecvArXvPXcFkM=
+github.com/u-root/uio v0.0.0-20240224005618-d2acac8f3701/go.mod h1:P3a5rG4X7tI17Nn3aOIAYr5HbIMukwXG0urG0WuL8OA=
+github.com/vishvananda/netns v0.0.5 h1:DfiHV+j8bA32MFM7bfEunvT8IAqQ/NzSJHtcmW5zdEY=
+github.com/vishvananda/netns v0.0.5/go.mod h1:SpkAiCQRtJ6TvvxPnOSyH3BMl6unz3xZlaprSwhNNJM=
+github.com/x448/float16 v0.8.4 h1:qLwI1I70+NjRFUR3zs1JPUCgaCXSh3SW62uAKT1mSBM=
+github.com/x448/float16 v0.8.4/go.mod h1:14CWIYCyZA/cWjXOioeEpHeN/83MdbZDRQHoFcYsOfg=
+go4.org/mem v0.0.0-20240501181205-ae6ca9944745 h1:Tl++JLUCe4sxGu8cTpDzRLd3tN7US4hOxG5YpKCzkek=
+go4.org/mem v0.0.0-20240501181205-ae6ca9944745/go.mod h1:reUoABIJ9ikfM5sgtSF3Wushcza7+WeD01VB9Lirh3g=
+go4.org/netipx v0.0.0-20231129151722-fdeea329fbba h1:0b9z3AuHCjxk0x/opv64kcgZLBseWJUpBw5I82+2U4M=
+go4.org/netipx v0.0.0-20231129151722-fdeea329fbba/go.mod h1:PLyyIXexvUFg3Owu6p/WfdlivPbZJsZdgWZlrGope/Y=
+golang.org/x/crypto v0.46.0 h1:cKRW/pmt1pKAfetfu+RCEvjvZkA9RimPbh7bhFjGVBU=
+golang.org/x/crypto v0.46.0/go.mod h1:Evb/oLKmMraqjZ2iQTwDwvCtJkczlDuTmdJXoZVzqU0=
+golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b h1:M2rDM6z3Fhozi9O7NWsxAkg/yqS/lQJ6PmkyIV3YP+o=
+golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b/go.mod h1:3//PLf8L/X+8b4vuAfHzxeRUl04Adcb341+IGKfnqS8=
+golang.org/x/exp/typeparams v0.0.0-20240314144324-c7f7c6466f7f h1:phY1HzDcf18Aq9A8KkmRtY9WvOFIxN8wgfvy6Zm1DV8=
+golang.org/x/exp/typeparams v0.0.0-20240314144324-c7f7c6466f7f/go.mod h1:AbB0pIl9nAr9wVwH+Z2ZpaocVmF5I4GyWCDIsVjR0bk=
+golang.org/x/image v0.27.0 h1:C8gA4oWU/tKkdCfYT6T2u4faJu3MeNS5O8UPWlPF61w=
+golang.org/x/image v0.27.0/go.mod h1:xbdrClrAUway1MUTEZDq9mz/UpRwYAkFFNUslZtcB+g=
+golang.org/x/mod v0.30.0 h1:fDEXFVZ/fmCKProc/yAXXUijritrDzahmwwefnjoPFk=
+golang.org/x/mod v0.30.0/go.mod h1:lAsf5O2EvJeSFMiBxXDki7sCgAxEUcZHXoXMKT4GJKc=
+golang.org/x/net v0.48.0 h1:zyQRTTrjc33Lhh0fBgT/H3oZq9WuvRR5gPC70xpDiQU=
+golang.org/x/net v0.48.0/go.mod h1:+ndRgGjkh8FGtu1w1FGbEC31if4VrNVMuKTgcAAnQRY=
+golang.org/x/oauth2 v0.33.0 h1:4Q+qn+E5z8gPRJfmRy7C2gGG3T4jIprK6aSYgTXGRpo=
+golang.org/x/oauth2 v0.33.0/go.mod h1:lzm5WQJQwKZ3nwavOZ3IS5Aulzxi68dUSgRHujetwEA=
+golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
+golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/sys v0.0.0-20220817070843-5a390386f1f2/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.40.0 h1:DBZZqJ2Rkml6QMQsZywtnjnnGvHza6BTfYFWY9kjEWQ=
+golang.org/x/sys v0.40.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/term v0.38.0 h1:PQ5pkm/rLO6HnxFR7N2lJHOZX6Kez5Y1gDSJla6jo7Q=
+golang.org/x/term v0.38.0/go.mod h1:bSEAKrOT1W+VSu9TSCMtoGEOUcKxOKgl3LE5QEF/xVg=
+golang.org/x/text v0.32.0 h1:ZD01bjUt1FQ9WJ0ClOL5vxgxOI/sVCNgX1YtKwcY0mU=
+golang.org/x/text v0.32.0/go.mod h1:o/rUWzghvpD5TXrTIBuJU77MTaN0ljMWE47kxGJQ7jY=
+golang.org/x/time v0.12.0 h1:ScB/8o8olJvc+CQPWrK3fPZNfh7qgwCrY0zJmoEQLSE=
+golang.org/x/time v0.12.0/go.mod h1:CDIdPxbZBQxdj6cxyCIdrNogrJKMJ7pr37NYpMcMDSg=
+golang.org/x/tools v0.39.0 h1:ik4ho21kwuQln40uelmciQPp9SipgNDdrafrYA4TmQQ=
+golang.org/x/tools v0.39.0/go.mod h1:JnefbkDPyD8UU2kI5fuf8ZX4/yUeh9W877ZeBONxUqQ=
+golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2 h1:B82qJJgjvYKsXS9jeunTOisW56dUokqW/FOteYJJ/yg=
+golang.zx2c4.com/wintun v0.0.0-20230126152724-0fa3db229ce2/go.mod h1:deeaetjYA+DHMHg+sMSMI58GrEteJUUzzw7en6TJQcI=
+golang.zx2c4.com/wireguard/windows v0.5.3 h1:On6j2Rpn3OEMXqBq00QEDC7bWSZrPIHKIus8eIuExIE=
+golang.zx2c4.com/wireguard/windows v0.5.3/go.mod h1:9TEe8TJmtwyQebdFwAkEWOPr3prrtqm+REGFifP60hI=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+gvisor.dev/gvisor v0.0.0-20260224225140-573d5e7127a8 h1:Zy8IV/+FMLxy6j6p87vk/vQGKcdnbprwjTxc8UiUtsA=
+gvisor.dev/gvisor v0.0.0-20260224225140-573d5e7127a8/go.mod h1:QkHjoMIBaYtpVufgwv3keYAbln78mBoCuShZrPrer1Q=
+honnef.co/go/tools v0.7.0-0.dev.0.20251022135355-8273271481d0 h1:5SXjd4ET5dYijLaf0O3aOenC0Z4ZafIWSpjUzsQaNho=
+honnef.co/go/tools v0.7.0-0.dev.0.20251022135355-8273271481d0/go.mod h1:EPDDhEZqVHhWuPI5zPAsjU0U7v9xNIWjoOVyZ5ZcniQ=
+howett.net/plist v1.0.0 h1:7CrbWYbPPO/PyNy38b2EB/+gYbjCe2DXBxgtOOZbSQM=
+howett.net/plist v1.0.0/go.mod h1:lqaXoTrLY4hg8tnEzNru53gicrbv7rrk+2xJA/7hw9g=
+software.sslmate.com/src/go-pkcs12 v0.4.0 h1:H2g08FrTvSFKUj+D309j1DPfk5APnIdAQAB8aEykJ5k=
+software.sslmate.com/src/go-pkcs12 v0.4.0/go.mod h1:Qiz0EyvDRJjjxGyUQa2cCNZn/wMyzrRJ/qcDXOQazLI=
+tailscale.com v1.96.5 h1:gNkfA/KSZAl6jCH9cj8urq00HRWItDDTtGsyATI89jA=
+tailscale.com v1.96.5/go.mod h1:/3lnZBYb2UEwnN0MNu2SDXUtT06AGd5k0s+OWx3WmcY=

experiment/tsnet-load/main.go

@@ -0,0 +1,166 @@
+// tsnet-load launches N userspace Tailscale nodes and has each one periodically
+// ping a tailnet peer (or HTTP-GET a subnet-routed host).
+//
+// Usage:
+//
+//	TS_AUTHKEY=tskey-... go run . -count 10 -interval 5s
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"io"
+	"log"
+	"math/rand/v2"
+	"net/http"
+	"net/netip"
+	"os"
+	"os/signal"
+	"path/filepath"
+	"sync"
+	"syscall"
+	"time"
+
+	"tailscale.com/client/tailscale"
+	"tailscale.com/ipn"
+	"tailscale.com/tailcfg"
+	"tailscale.com/tsnet"
+)
+
+const (
+	httpTarget = "http://10.210.1.2"
+	pingTarget = "100.92.123.72"
+)
+
+func main() {
+	authKey := flag.String("authkey", os.Getenv("TS_AUTHKEY"),
+		"Tailscale reusable ephemeral auth key (or set TS_AUTHKEY).")
+	count := flag.Int("count", 10, "Number of tsnet nodes to launch.")
+	interval := flag.Duration("interval", 5*time.Second, "Interval between actions per node.")
+	hostnamePrefix := flag.String("hostname-prefix", "uncloud", "Hostname prefix for tsnet nodes.")
+	stateRoot := flag.String("state-dir", "./state", "Directory to keep tsnet state (default: a fresh temp dir).")
+	flag.Parse()
+
+	if *authKey == "" {
+		log.Fatal("missing Tailscale auth key: pass -authkey or set TS_AUTHKEY.")
+	}
+
+	root := *stateRoot
+	if root == "" {
+		var err error
+		root, err = os.MkdirTemp("", "tsnet-load-*")
+		if err != nil {
+			log.Fatalf("mktemp: %v", err)
+		}
+		defer os.RemoveAll(root)
+	} else if err := os.MkdirAll(root, 0o700); err != nil {
+		log.Fatalf("mkdir state dir: %v", err)
+	}
+
+	ctx, stop := signal.NotifyContext(context.Background(), syscall.SIGINT, syscall.SIGTERM)
+	defer stop()
+
+	var wg sync.WaitGroup
+	for i := 0; i < *count; i++ {
+		wg.Add(1)
+		go func(id int) {
+			defer wg.Done()
+			runNode(ctx, id, *authKey, *hostnamePrefix, root, *interval)
+		}(i)
+	}
+	wg.Wait()
+}
+
+func runNode(ctx context.Context, id int, authKey, prefix, stateRoot string, interval time.Duration) {
+	logPrefix := fmt.Sprintf("[node-%02d] ", id)
+	logger := log.New(os.Stderr, logPrefix, log.LstdFlags|log.Lmsgprefix)
+
+	s := &tsnet.Server{
+		Hostname:  fmt.Sprintf("%s-%02d", prefix, id),
+		AuthKey:   authKey,
+		Ephemeral: true,
+		Dir:       filepath.Join(stateRoot, fmt.Sprintf("node-%02d", id)),
+		// Silence per-node tsnet chatter. Comment out to debug.
+		Logf: func(string, ...any) {},
+	}
+	defer s.Close()
+
+	upCtx, cancel := context.WithTimeout(ctx, 60*time.Second)
+	defer cancel()
+	status, err := s.Up(upCtx)
+	if err != nil {
+		logger.Printf("tsnet up: %v", err)
+		return
+	}
+	logger.Printf("up as %s (%v)", s.Hostname, status.TailscaleIPs)
+
+	// Accept subnet routes advertised by other tailnet peers. tsnet defaults
+	// to RouteAll=false, so without this 10.210.0.0/24 etc. are unreachable.
+	lc, err := s.LocalClient()
+	if err != nil {
+		logger.Printf("local client: %v", err)
+		return
+	}
+	if _, err := lc.EditPrefs(ctx, &ipn.MaskedPrefs{
+		RouteAllSet: true,
+		Prefs:       ipn.Prefs{RouteAll: true},
+	}); err != nil {
+		logger.Printf("edit prefs (RouteAll): %v", err)
+		return
+	}
+
+	httpClient := &http.Client{
+		Transport: &http.Transport{DialContext: s.Dial},
+		Timeout:   10 * time.Second,
+	}
+	_ = httpClient
+
+	// Stagger ticks so all nodes don't fire in lockstep.
+	time.Sleep(time.Duration(rand.Int64N(int64(interval))))
+
+	tick := time.NewTicker(interval)
+	defer tick.Stop()
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-tick.C:
+			doPing(ctx, lc, logger)
+			//doHTTP(ctx, httpClient, logger)
+		}
+	}
+}
+
+func doPing(ctx context.Context, lc *tailscale.LocalClient, logger *log.Logger) {
+	pctx, cancel := context.WithTimeout(ctx, 5*time.Second)
+	defer cancel()
+
+	res, err := lc.Ping(pctx, netip.MustParseAddr(pingTarget), tailcfg.PingICMP)
+	if err != nil {
+		logger.Printf("ping %s: %v", pingTarget, err)
+		return
+	}
+	if res.Err != "" {
+		logger.Printf("ping %s: %s", pingTarget, res.Err)
+		return
+	}
+	logger.Printf("ping %s ok in %.1fms via %s", pingTarget, res.LatencySeconds*1000, res.Endpoint)
+}
+
+func doHTTP(ctx context.Context, c *http.Client, logger *log.Logger) {
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, httpTarget, nil)
+	if err != nil {
+		logger.Printf("http build req: %v", err)
+		return
+	}
+	start := time.Now()
+	resp, err := c.Do(req)
+	if err != nil {
+		logger.Printf("http %s: %v", httpTarget, err)
+		return
+	}
+	defer resp.Body.Close()
+	n, _ := io.Copy(io.Discard, resp.Body)
+	logger.Printf("http %s: %s, %d bytes in %v", httpTarget, resp.Status, n, time.Since(start).Round(time.Millisecond))
+}

go.mod

@@ -11,10 +11,11 @@ require (
 	github.com/Masterminds/semver v1.5.0
 	github.com/Masterminds/squirrel v1.5.4
 	github.com/alecthomas/chroma/v2 v2.20.0
+	github.com/caarlos0/go-version v0.2.2
 	github.com/caddyserver/caddy/v2 v2.8.4
 	github.com/cenkalti/backoff/v4 v4.3.0
-	github.com/charmbracelet/colorprofile v0.4.2
-	github.com/charmbracelet/x/ansi v0.11.6
+	github.com/charmbracelet/colorprofile v0.4.3
+	github.com/charmbracelet/x/ansi v0.11.7
 	github.com/compose-spec/compose-go/v2 v2.9.0
 	github.com/containerd/errdefs v1.0.0
 	github.com/containerd/platforms v1.0.0-rc.1
@@ -29,12 +30,15 @@ require (
 	github.com/goccy/go-yaml v1.17.1
 	github.com/google/go-cmp v0.7.0
 	github.com/google/go-containerregistry v0.20.2
+	github.com/google/uuid v1.6.0
 	github.com/jmoiron/sqlx v1.4.0
+	github.com/mattn/go-shellwords v1.0.12
 	github.com/miekg/dns v1.1.65
 	github.com/mitchellh/mapstructure v1.5.0
 	github.com/moby/term v0.5.2
 	github.com/opencontainers/go-digest v1.0.0
 	github.com/opencontainers/image-spec v1.1.1
+	github.com/prometheus/client_golang v1.22.0
 	github.com/psviderski/unregistry v0.4.1
 	github.com/siderolabs/grpc-proxy v0.5.1
 	github.com/spf13/cobra v1.10.1
@@ -44,8 +48,8 @@ require (
 	go4.org/netipx v0.0.0-20231129151722-fdeea329fbba
 	golang.org/x/crypto v0.41.0
 	golang.org/x/net v0.43.0
-	golang.org/x/sync v0.19.0
-	golang.org/x/sys v0.42.0
+	golang.org/x/sync v0.20.0
+	golang.org/x/sys v0.45.0
 	golang.org/x/term v0.34.0
 	golang.zx2c4.com/wireguard v0.0.0-20231211153847-12269c276173
 	golang.zx2c4.com/wireguard/wgctrl v0.0.0-20230429144221-925a1e7659e6
@@ -94,7 +98,7 @@ require (
 	github.com/catppuccin/go v0.3.0 // indirect
 	github.com/cespare/xxhash v1.1.0 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
-	github.com/charmbracelet/ultraviolet v0.0.0-20260205113103-524a6607adb8 // indirect
+	github.com/charmbracelet/ultraviolet v0.0.0-20260525132238-948f4557a654 // indirect
 	github.com/charmbracelet/x/exp/ordered v0.1.0 // indirect
 	github.com/charmbracelet/x/exp/strings v0.0.0-20240919170804-a4978c8e603a // indirect
 	github.com/charmbracelet/x/term v0.2.2 // indirect
@@ -164,7 +168,6 @@ require (
 	github.com/google/gofuzz v1.2.0 // indirect
 	github.com/google/pprof v0.0.0-20250403155104-27863c87afa6 // indirect
 	github.com/google/shlex v0.0.0-20191202100458-e7afc7fbc510 // indirect
-	github.com/google/uuid v1.6.0 // indirect
 	github.com/gorilla/handlers v1.5.2 // indirect
 	github.com/gorilla/mux v1.8.1 // indirect
 	github.com/gorilla/websocket v1.5.3 // indirect
@@ -199,13 +202,12 @@ require (
 	github.com/lann/builder v0.0.0-20180802200727-47ae307949d0 // indirect
 	github.com/lann/ps v0.0.0-20150810152359-62de8c46ede0 // indirect
 	github.com/libdns/libdns v0.2.2 // indirect
-	github.com/lucasb-eyer/go-colorful v1.3.0 // indirect
+	github.com/lucasb-eyer/go-colorful v1.4.0 // indirect
 	github.com/mailru/easyjson v0.7.7 // indirect
 	github.com/manifoldco/promptui v0.9.0 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/mattn/go-runewidth v0.0.20 // indirect
-	github.com/mattn/go-shellwords v1.0.12 // indirect
+	github.com/mattn/go-runewidth v0.0.23 // indirect
 	github.com/mdlayher/genetlink v1.3.2 // indirect
 	github.com/mdlayher/netlink v1.7.2 // indirect
 	github.com/mdlayher/socket v0.5.1 // indirect
@@ -246,7 +248,6 @@ require (
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
-	github.com/prometheus/client_golang v1.22.0 // indirect
 	github.com/prometheus/client_model v0.6.1 // indirect
 	github.com/prometheus/common v0.62.0 // indirect
 	github.com/prometheus/procfs v0.15.1 // indirect
@@ -357,3 +358,5 @@ require (
 	sigs.k8s.io/structured-merge-diff/v4 v4.4.2 // indirect
 	sigs.k8s.io/yaml v1.4.0 // indirect
 )
+
+replace charm.land/bubbletea/v2 => github.com/unlabs-dev/bubbletea/v2 v2.0.8-uncloud.1

go.sum

@@ -1,7 +1,5 @@
 charm.land/bubbles/v2 v2.0.0 h1:tE3eK/pHjmtrDiRdoC9uGNLgpopOd8fjhEe31B/ai5s=
 charm.land/bubbles/v2 v2.0.0/go.mod h1:rCHoleP2XhU8um45NTuOWBPNVHxnkXKTiZqcclL/qOI=
-charm.land/bubbletea/v2 v2.0.2 h1:4CRtRnuZOdFDTWSff9r8QFt/9+z6Emubz3aDMnf/dx0=
-charm.land/bubbletea/v2 v2.0.2/go.mod h1:3LRff2U4WIYXy7MTxfbAQ+AdfM3D8Xuvz2wbsOD9OHQ=
 charm.land/huh/v2 v2.0.1 h1:9vhBjlIDuikdPKH+qnoG++GERVxqY0Lkv14xW57lj98=
 charm.land/huh/v2 v2.0.1/go.mod h1:93eEveeeqn47MwiC3tf+2atZ2l7Is88rAtmZNZ8x9Wc=
 charm.land/lipgloss/v2 v2.0.1 h1:6Xzrn49+Py1Um5q/wZG1gWgER2+7dUyZ9XMEufqPSys=
@@ -138,6 +136,8 @@ github.com/bugsnag/osext v0.0.0-20130617224835-0dd3f918b21b h1:otBG+dV+YK+Soembj
 github.com/bugsnag/osext v0.0.0-20130617224835-0dd3f918b21b/go.mod h1:obH5gd0BsqsP2LwDJ9aOkm/6J86V6lyAXCoQWGw3K50=
 github.com/bugsnag/panicwrap v0.0.0-20151223152923-e2c28503fcd0 h1:nvj0OLI3YqYXer/kZD8Ri1aaunCxIEsOst1BVJswV0o=
 github.com/bugsnag/panicwrap v0.0.0-20151223152923-e2c28503fcd0/go.mod h1:D/8v3kj0zr8ZAKg1AQ6crr+5VwKN5eIywRkfhyM/+dE=
+github.com/caarlos0/go-version v0.2.2 h1:5r+nlrg4H2wOVwWjqRqRRIRbZ7ytRmjC9xoMIP0a5kQ=
+github.com/caarlos0/go-version v0.2.2/go.mod h1:X+rI5VAtJDpcjCjeEIXpxGa5+rTcgur1FK66wS0/944=
 github.com/caddyserver/caddy/v2 v2.8.4 h1:q3pe0wpBj1OcHFZ3n/1nl4V4bxBrYoSoab7rL9BMYNk=
 github.com/caddyserver/caddy/v2 v2.8.4/go.mod h1:vmDAHp3d05JIvuhc24LmnxVlsZmWnUwbP5WMjzcMPWw=
 github.com/caddyserver/certmagic v0.21.4 h1:e7VobB8rffHv8ZZpSiZtEwnLDHUwLVYLWzWSa1FfKI0=
@@ -155,12 +155,12 @@ github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XL
 github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/charmbracelet/colorprofile v0.4.2 h1:BdSNuMjRbotnxHSfxy+PCSa4xAmz7szw70ktAtWRYrY=
-github.com/charmbracelet/colorprofile v0.4.2/go.mod h1:0rTi81QpwDElInthtrQ6Ni7cG0sDtwAd4C4le060fT8=
-github.com/charmbracelet/ultraviolet v0.0.0-20260205113103-524a6607adb8 h1:eyFRbAmexyt43hVfeyBofiGSEmJ7krjLOYt/9CF5NKA=
-github.com/charmbracelet/ultraviolet v0.0.0-20260205113103-524a6607adb8/go.mod h1:SQpCTRNBtzJkwku5ye4S3HEuthAlGy2n9VXZnWkEW98=
-github.com/charmbracelet/x/ansi v0.11.6 h1:GhV21SiDz/45W9AnV2R61xZMRri5NlLnl6CVF7ihZW8=
-github.com/charmbracelet/x/ansi v0.11.6/go.mod h1:2JNYLgQUsyqaiLovhU2Rv/pb8r6ydXKS3NIttu3VGZQ=
+github.com/charmbracelet/colorprofile v0.4.3 h1:QPa1IWkYI+AOB+fE+mg/5/4HRMZcaXex9t5KX76i20Q=
+github.com/charmbracelet/colorprofile v0.4.3/go.mod h1:/zT4BhpD5aGFpqQQqw7a+VtHCzu+zrQtt1zhMt9mR4Q=
+github.com/charmbracelet/ultraviolet v0.0.0-20260525132238-948f4557a654 h1:FpSYhY28ucg9ZRr+2wj67FAQ0Ey5yiK0072PmRDJNek=
+github.com/charmbracelet/ultraviolet v0.0.0-20260525132238-948f4557a654/go.mod h1:hFpumms29Smx3LStRfku8vcCTBe1Kq8aCXtHUJa3mjY=
+github.com/charmbracelet/x/ansi v0.11.7 h1:kzv1kJvjg2S3r9KHo8hDdHFQLEqn4RBCb39dAYC84jI=
+github.com/charmbracelet/x/ansi v0.11.7/go.mod h1:9qGpnAVYz+8ACONkZBUWPtL7lulP9No6p1epAihUZwQ=
 github.com/charmbracelet/x/conpty v0.1.1 h1:s1bUxjoi7EpqiXysVtC+a8RrvPPNcNvAjfi4jxsAuEs=
 github.com/charmbracelet/x/conpty v0.1.1/go.mod h1:OmtR77VODEFbiTzGE9G1XiRJAga6011PIm4u5fTNZpk=
 github.com/charmbracelet/x/errors v0.0.0-20240508181413-e8d8b6e2de86 h1:JSt3B+U9iqk37QUU2Rvb6DSBYRLtWqFqfxf8l5hOZUA=
@@ -599,8 +599,8 @@ github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
 github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
 github.com/libdns/libdns v0.2.2 h1:O6ws7bAfRPaBsgAYt8MDe2HcNBGC29hkZ9MX2eUSX3s=
 github.com/libdns/libdns v0.2.2/go.mod h1:4Bj9+5CQiNMVGf87wjX4CY3HQJypUHRuLvlsfsZqLWQ=
-github.com/lucasb-eyer/go-colorful v1.3.0 h1:2/yBRLdWBZKrf7gB40FoiKfAWYQ0lqNcbuQwVHXptag=
-github.com/lucasb-eyer/go-colorful v1.3.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
+github.com/lucasb-eyer/go-colorful v1.4.0 h1:UtrWVfLdarDgc44HcS7pYloGHJUjHV/4FwW4TvVgFr4=
+github.com/lucasb-eyer/go-colorful v1.4.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
 github.com/magiconair/properties v1.5.3/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
 github.com/magiconair/properties v1.8.0/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
 github.com/magiconair/properties v1.8.9 h1:nWcCbLq1N2v/cpNsy5WvQ37Fb+YElfq20WJ/a8RkpQM=
@@ -621,8 +621,8 @@ github.com/mattn/go-isatty v0.0.12/go.mod h1:cbi8OIDigv2wuxKPP5vlRcQ1OAZbq2CE4Ky
 github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
 github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
-github.com/mattn/go-runewidth v0.0.20 h1:WcT52H91ZUAwy8+HUkdM3THM6gXqXuLJi9O3rjcQQaQ=
-github.com/mattn/go-runewidth v0.0.20/go.mod h1:XBkDxAl56ILZc9knddidhrOlY5R/pDhgLpndooCuJAs=
+github.com/mattn/go-runewidth v0.0.23 h1:7ykA0T0jkPpzSvMS5i9uoNn2Xy3R383f9HDx3RybWcw=
+github.com/mattn/go-runewidth v0.0.23/go.mod h1:XBkDxAl56ILZc9knddidhrOlY5R/pDhgLpndooCuJAs=
 github.com/mattn/go-shellwords v1.0.12 h1:M2zGm7EW6UQJvDeQxo4T51eKPurbeFbe8WtebGE2xrk=
 github.com/mattn/go-shellwords v1.0.12/go.mod h1:EZzvwXDESEeg03EKmM+RmDnNOPKG4lLtQsUlTZDWQ8Y=
 github.com/mattn/go-sqlite3 v1.6.0/go.mod h1:FPy6KqzDD04eiIsT53CuJW3U88zkxoIYsOqkbpncsNc=
@@ -914,6 +914,8 @@ github.com/tonistiigi/units v0.0.0-20180711220420-6950e57a87ea/go.mod h1:WPnis/6
 github.com/tonistiigi/vt100 v0.0.0-20240514184818-90bafcd6abab h1:H6aJ0yKQ0gF49Qb2z5hI1UHxSQt4JMyxebFR15KnApw=
 github.com/tonistiigi/vt100 v0.0.0-20240514184818-90bafcd6abab/go.mod h1:ulncasL3N9uLrVann0m+CDlJKWsIAP34MPcOJF6VRvc=
 github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
+github.com/unlabs-dev/bubbletea/v2 v2.0.8-uncloud.1 h1:898LVw5QvmRX/y+pgzCo2pE/NbN9CZfdpiVnzAeAFDY=
+github.com/unlabs-dev/bubbletea/v2 v2.0.8-uncloud.1/go.mod h1:DGW2q8gvzHnOpMpZTORs0aySVHCox5C+2Svk0fci1qs=
 github.com/urfave/cli v1.22.17 h1:SYzXoiPfQjHBbkYxbew5prZHS1TOLT3ierW8SYLqtVQ=
 github.com/urfave/cli v1.22.17/go.mod h1:b0ht0aqgH/6pBYzzxURyrM4xXNgsoT/n2ZzwQiEhNVo=
 github.com/vbatts/tar-split v0.12.1 h1:CqKoORW7BUWBe7UL/iqTVvkTBOF8UvOMKOIZykxnnbo=
@@ -1108,8 +1110,8 @@ golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
 golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
-golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/sync v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
+golang.org/x/sync v0.20.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
 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=
 golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
@@ -1150,8 +1152,8 @@ golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
-golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
+golang.org/x/sys v0.45.0 h1:dO4czNzziLiiXplLQgBCEpCvXQ3dnkn0SdaZSYdQ+FY=
+golang.org/x/sys v0.45.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
 golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2/go.mod h1:TeRTkGYfJXctD9OcfyVLyj2J3IxLnKwHJR8f4D8a3YE=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=

internal/cli/cli.go

@@ -11,6 +11,8 @@ import (
 	"github.com/psviderski/uncloud/internal/cli/config"
 	"github.com/psviderski/uncloud/internal/machine"
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
+	"github.com/psviderski/uncloud/internal/machine/cluster"
+	"github.com/psviderski/uncloud/internal/machine/network"
 	"github.com/psviderski/uncloud/internal/sshexec"
 	"github.com/psviderski/uncloud/pkg/api"
 	"github.com/psviderski/uncloud/pkg/client"
@@ -174,6 +176,8 @@ type InitClusterOptions struct {
 	Version            string
 	AutoConfirm        bool
 	WireguardEndpoints []*pb.IPPort
+	WireguardMTU       int
+	WireguardPort      int
 }
 
 // InitCluster initialises a new cluster on a remote machine and returns a client to interact with the cluster.
@@ -234,6 +238,8 @@ func (cli *CLI) initRemoteMachine(ctx context.Context, opts InitClusterOptions)
 		MachineName:        opts.MachineName,
 		Network:            pb.NewIPPrefix(opts.Network),
 		WireguardEndpoints: opts.WireguardEndpoints,
+		WireguardMtu:       int32(opts.WireguardMTU),
+		WireguardPort:      int32(opts.WireguardPort),
 	}
 	if opts.PublicIP != nil {
 		if opts.PublicIP.IsValid() {
@@ -317,13 +323,15 @@ type AddMachineOptions struct {
 	Version            string
 	AutoConfirm        bool
 	WireguardEndpoints []*pb.IPPort
+	WireguardMTU       int
+	WireguardPort      int
 }
 
 // AddMachine provisions a remote machine and adds it to the cluster. It returns a cluster client and a machine client.
 // The cluster client is connected to the existing machine in the cluster. It was used to add the new machine to the
 // 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) {
+func (cli *CLI) AddMachine(ctx context.Context, opts AddMachineOptions) (_ *client.Client, _ *client.Client, err error) {
 	contextName := cli.ContextOverrideOrCurrent()
 	c, err := cli.ConnectCluster(ctx)
 	if err != nil {
@@ -344,16 +352,19 @@ func (cli *CLI) AddMachine(ctx context.Context, opts AddMachineOptions) (*client
 			machineClient.Close()
 		}
 	}()
+	// IMPORTANT: 'err' is a named return value so the deferred cleanups above observe it on every error return.
+	// Do not shadow it with ':=' in a nested scope, or the deferred client cleanup would be skipped on error.
 
 	// Check if the machine is already initialised as a cluster member and prompt the user to reset it first.
-	// TODO: refactor to use client.InspectMachine.
-	minfo, err := machineClient.Inspect(ctx, &emptypb.Empty{})
+	inspectResp, err := machineClient.MachineClient.InspectMachine(ctx, nil)
 	if err != nil {
 		return nil, nil, fmt.Errorf("inspect machine: %w", err)
 	}
+	minfo := inspectResp.Machines[0].Machine
 	if minfo.Id != "" {
 		// Check if the machine is already a member of this cluster.
-		machines, err := c.ListMachines(ctx, nil)
+		var machines api.MachineMembersList
+		machines, err = c.ListMachines(ctx, nil)
 		if err != nil {
 			return nil, nil, fmt.Errorf("list cluster machines: %w", err)
 		}
@@ -401,11 +412,32 @@ func (cli *CLI) AddMachine(ctx context.Context, opts AddMachineOptions) (*client
 	} else {
 		endpoints = make([]*pb.IPPort, len(token.Endpoints))
 		for i, addrPort := range token.Endpoints {
+			// If a custom WireGuard port is specified, override the port from the token endpoints
+			// since the token was generated before the machine knows its configured port.
+			if opts.WireguardPort != 0 && opts.WireguardPort != network.DefaultWireGuardPort {
+				addrPort = netip.AddrPortFrom(addrPort.Addr(), uint16(opts.WireguardPort))
+			}
 			endpoints[i] = pb.NewIPPort(addrPort)
 		}
 	}
+	// Default the machine name to the machine's hostname when not explicitly provided, ensuring it is
+	// unique within the cluster.
+	machineName := opts.MachineName
+	if machineName == "" {
+		var machines api.MachineMembersList
+		if machines, err = c.ListMachines(ctx, nil); err != nil {
+			return nil, nil, fmt.Errorf("list cluster machines: %w", err)
+		}
+		existing := make([]string, len(machines))
+		for i, m := range machines {
+			existing[i] = m.Machine.Name
+		}
+		if machineName, err = cluster.DefaultMachineName(minfo.Hostname, existing); err != nil {
+			return nil, nil, fmt.Errorf("generate machine name: %w", err)
+		}
+	}
 	addReq := &pb.AddMachineRequest{
-		Name: opts.MachineName,
+		Name: machineName,
 		Network: &pb.NetworkConfig{
 			Endpoints: endpoints,
 			PublicKey: token.PublicKey,
@@ -425,16 +457,16 @@ func (cli *CLI) AddMachine(ctx context.Context, opts AddMachineOptions) (*client
 		return nil, nil, fmt.Errorf("add machine to cluster (context '%s'): %w", contextName, err)
 	}
 
-	// Get the current store DB version from the cluster to pass to the join request.
-	var storeDBVersion int64
-	inspectResp, err := c.MachineClient.InspectMachine(ctx, &emptypb.Empty{})
+	// Snapshot the cluster store version so the new machine can catch up before participating.
+	var storeVersion map[string]int64
+	inspectResp, err = c.MachineClient.InspectMachine(ctx, &emptypb.Empty{})
 	if err != nil {
 		// TODO(lhf): remove Unimplemented check when v0.17.0 is released.
 		if status.Convert(err).Code() != codes.Unimplemented {
 			return nil, nil, fmt.Errorf("inspect current cluster machine: %w", err)
 		}
 	} else {
-		storeDBVersion = inspectResp.Machines[0].StoreDbVersion
+		storeVersion = inspectResp.Machines[0].StoreVersion
 	}
 
 	// Get the most up-to-date list of other machines in the cluster to include them in the join request.
@@ -453,7 +485,9 @@ func (cli *CLI) AddMachine(ctx context.Context, opts AddMachineOptions) (*client
 	joinReq := &pb.JoinClusterRequest{
 		Machine:         addResp.Machine,
 		OtherMachines:   otherMachines,
-		MinStoreDbVersion: storeDBVersion,
+		MinStoreVersion: storeVersion,
+		WireguardMtu:    int32(opts.WireguardMTU),
+		WireguardPort:   int32(opts.WireguardPort),
 	}
 	if _, err = machineClient.JoinCluster(ctx, joinReq); err != nil {
 		return nil, nil, fmt.Errorf("join cluster: %w", err)

internal/cli/completion/compose.go

@@ -0,0 +1,30 @@
+package completion
+
+import (
+	"context"
+	"slices"
+	"strings"
+
+	composecli "github.com/compose-spec/compose-go/v2/cli"
+	"github.com/psviderski/uncloud/pkg/client/compose"
+	"github.com/spf13/cobra"
+)
+
+func ComposeServices(ctx context.Context, args []string, toComplete string, files, profiles []string) ([]cobra.Completion, cobra.ShellCompDirective) {
+	project, err := compose.LoadProject(ctx, files, composecli.WithDefaultProfiles(profiles...))
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+
+	services := project.ServiceNames()
+	names := []cobra.Completion{}
+	for _, service := range services {
+		if slices.Contains(args, service) {
+			continue
+		}
+		if strings.HasPrefix(service, toComplete) {
+			names = append(names, service)
+		}
+	}
+	return names, cobra.ShellCompDirectiveNoFileComp
+}

internal/cli/completion/context.go

@@ -0,0 +1,32 @@
+package completion
+
+import (
+	"context"
+	"maps"
+	"slices"
+	"strings"
+
+	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/spf13/cobra"
+)
+
+func Contexts(ctx context.Context, uncli *cli.CLI, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+	// There are no contexts to complete when the CLI uses a direct machine connection (--connect) without a config.
+	if uncli.Config == nil {
+		return nil, cobra.ShellCompDirectiveNoFileComp
+	}
+
+	contexts := slices.Sorted(maps.Keys(uncli.Config.Contexts))
+
+	names := []cobra.Completion{}
+	for _, context := range contexts {
+		if slices.Contains(args, context) {
+			continue
+		}
+		if strings.HasPrefix(context, toComplete) {
+			names = append(names, context)
+		}
+	}
+
+	return names, cobra.ShellCompDirectiveNoFileComp
+}

internal/cli/completion/machine.go

@@ -0,0 +1,42 @@
+package completion
+
+import (
+	"context"
+	"slices"
+	"strings"
+
+	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/spf13/cobra"
+)
+
+func Machines(ctx context.Context, uncli *cli.CLI, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+	// Disable the connection progress output to not interfere with the shell completion output.
+	client, err := uncli.ConnectClusterWithOptions(ctx, cli.ConnectOptions{})
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+	defer client.Close()
+
+	machines, err := client.ListMachines(ctx, nil)
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+	names := []cobra.Completion{}
+	for _, machine := range machines {
+		if slices.Contains(args, machine.Machine.Name) {
+			continue
+		}
+		if strings.HasPrefix(machine.Machine.Name, toComplete) {
+			names = append(names, machine.Machine.Name)
+		}
+	}
+	return names, cobra.ShellCompDirectiveNoFileComp
+}
+
+func MachinesFlag(cmd *cobra.Command) {
+	cmd.RegisterFlagCompletionFunc("machine",
+		func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+			uncli := cmd.Context().Value("cli").(*cli.CLI)
+			return Machines(cmd.Context(), uncli, args, toComplete)
+		})
+}

internal/cli/completion/service.go

@@ -0,0 +1,35 @@
+// Package completion implements completion functions for the uc cli.
+package completion
+
+import (
+	"context"
+	"slices"
+	"strings"
+
+	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/spf13/cobra"
+)
+
+func Services(ctx context.Context, uncli *cli.CLI, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+	// Disable the connection progress output to not interfere with the shell completion output.
+	client, err := uncli.ConnectClusterWithOptions(ctx, cli.ConnectOptions{})
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+	defer client.Close()
+
+	services, err := client.ListServices(ctx)
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+	names := []cobra.Completion{}
+	for _, service := range services {
+		if slices.Contains(args, service.Name) {
+			continue
+		}
+		if strings.HasPrefix(service.Name, toComplete) {
+			names = append(names, service.Name)
+		}
+	}
+	return names, cobra.ShellCompDirectiveNoFileComp
+}

internal/cli/completion/volume.go

@@ -0,0 +1,35 @@
+package completion
+
+import (
+	"context"
+	"slices"
+	"strings"
+
+	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/pkg/api"
+	"github.com/spf13/cobra"
+)
+
+func Volumes(ctx context.Context, uncli *cli.CLI, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
+	// Disable the connection progress output to not interfere with the shell completion output.
+	client, err := uncli.ConnectClusterWithOptions(ctx, cli.ConnectOptions{})
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+	defer client.Close()
+
+	volumes, err := client.ListVolumes(ctx, &api.VolumeFilter{})
+	if err != nil {
+		return nil, cobra.ShellCompDirectiveError
+	}
+	names := []cobra.Completion{}
+	for _, volume := range volumes {
+		if slices.Contains(args, volume.Volume.Name) {
+			continue
+		}
+		if strings.HasPrefix(volume.Volume.Name, toComplete) {
+			names = append(names, volume.Volume.Name)
+		}
+	}
+	return names, cobra.ShellCompDirectiveNoFileComp
+}

internal/cli/connect.go

@@ -31,10 +31,9 @@ func ConnectCluster(ctx context.Context, conn config.MachineConnection, opts Con
 }
 
 // connectClusterWithProgress connects to the cluster while displaying a progress spinner.
-// If the stdout is not a terminal, it falls back to simple progress logs to stderr.
+// If a terminal is not available, it falls back to simple progress logs to stderr.
 func connectClusterWithProgress(ctx context.Context, conn config.MachineConnection) (*client.Client, error) {
-	// If stdout is not a terminal, fall back to simple progress logs.
-	if !tui.IsStdoutTerminal() {
+	if !tui.IsTerminalAvailable() {
 		fmt.Fprintln(os.Stderr, "Connecting to", conn.String())
 		cli, err := connectCluster(ctx, conn)
 		if err != nil {
@@ -45,8 +44,8 @@ func connectClusterWithProgress(ctx context.Context, conn config.MachineConnecti
 		return cli, err
 	}
 
-	// Run the connection TUI model.
-	p := tea.NewProgram(newConnectModel(ctx, conn))
+	// Run the connection TUI model. Render to stderr so stdout stays clean for command output.
+	p := tea.NewProgram(newConnectModel(ctx, conn), tea.WithOutput(os.Stderr))
 	model, err := p.Run()
 	if err != nil {
 		return nil, fmt.Errorf("run connection TUI: %w", err)

internal/cli/errors.go

@@ -0,0 +1,15 @@
+package cli
+
+// CancelledError signals an interactive command was aborted by the user at a confirmation prompt.
+type CancelledError struct {
+	Message string
+}
+
+func (e *CancelledError) Error() string {
+	return e.Message
+}
+
+// Cancelled returns a CancelledError carrying the given user-facing message.
+func Cancelled(msg string) error {
+	return &CancelledError{Message: msg}
+}

internal/cli/flags.go

@@ -8,7 +8,6 @@ import (
 	"strings"
 
 	"github.com/psviderski/uncloud/internal/machine/api/pb"
-	"github.com/psviderski/uncloud/internal/machine/network"
 	"github.com/spf13/cobra"
 )
 
@@ -40,18 +39,18 @@ func BindEnvToFlag(cmd *cobra.Command, flagName, envVar string) {
 }
 
 // ParseWireGuardEndpoints parses a list of endpoint strings into a list of IPPort protobuf messages. Each value can
-// be an IP address, IP:PORT, IPv6, or [IPv6]:PORT. If the port is omitted, the default WireGuard port is used.
-func ParseWireGuardEndpoints(values []string) ([]*pb.IPPort, error) {
+// be an IP address, IP:PORT, IPv6, or [IPv6]:PORT. If the port is omitted, defaultPort is used.
+func ParseWireGuardEndpoints(values []string, defaultPort uint16) ([]*pb.IPPort, error) {
 	endpoints := make([]*pb.IPPort, 0, len(values))
 	for _, v := range values {
 		ap, err := netip.ParseAddrPort(v)
 		if err != nil {
-			// Try parsing as a bare IP address and use the default WireGuard port.
+			// Try parsing as a bare IP address and use the provided default port.
 			addr, addrErr := netip.ParseAddr(v)
 			if addrErr != nil {
 				return nil, fmt.Errorf("invalid endpoint '%s': must be IP, IPv6, IP:PORT, or [IPv6]:PORT", v)
 			}
-			ap = netip.AddrPortFrom(addr, network.WireGuardPort)
+			ap = netip.AddrPortFrom(addr, defaultPort)
 		}
 		endpoints = append(endpoints, pb.NewIPPort(ap))
 	}

internal/cli/logs/formatter.go

@@ -129,7 +129,7 @@ func (f *Formatter) PrintEntry(entry api.ServiceLogEntry) {
 	output.WriteString(f.formatMachine(entry.Metadata.MachineName))
 	output.WriteString(" ")
 
-	// Service/container_id or service name for a systemd service.
+	// Service/container_id or service name for a system service.
 	output.WriteString(f.formatService(entry.Metadata.ServiceName, entry.Metadata.ContainerID, entry.Metadata.Hook))
 	output.WriteString(" ")
 
@@ -160,7 +160,7 @@ func (f *Formatter) printError(entry api.ServiceLogEntry) {
 			stringid.TruncateID(entry.Metadata.ContainerID),
 			entry.Metadata.MachineName)
 	} else {
-		msg = fmt.Sprintf("WARNING: log stream from systemd service '%s' on machine '%s'",
+		msg = fmt.Sprintf("WARNING: log stream from system service '%s' on machine '%s'",
 			entry.Metadata.ServiceName,
 			entry.Metadata.MachineName)
 	}

internal/cli/machine.go

@@ -99,15 +99,15 @@ func provisionMachine(ctx context.Context, exec sshexec.Executor, version string
 }
 
 func promptResetMachine() error {
-	if !tui.IsStdinTerminal() {
+	if !tui.IsTerminalAvailable() {
 		return errors.New("the remote machine is already initialised as a cluster member; " +
 			"cannot ask to confirm reset in non-interactive mode, " +
 			"use --yes flag or set UNCLOUD_AUTO_CONFIRM=true to auto-confirm")
 	}
 
-	fmt.Println(tui.Red.Render("The remote machine is already initialised as a cluster member. Resetting it will:\n" +
-		"- Remove all service containers from the machine\n" +
-		"- Reset the machine to the uninitialised state"))
+	fmt.Fprintln(os.Stderr, tui.Red.Render("The remote machine is already initialised as a cluster member. Resetting it will:\n"+
+		"- Remove all service containers from the machine\n"+
+		"- Reset the Uncloud daemon on the machine to the uninitialised state"))
 
 	var confirm bool
 	form := huh.NewForm(
@@ -119,7 +119,9 @@ func promptResetMachine() error {
 				Value(&confirm),
 		),
 	).WithTheme(tui.ThemeConfirmDanger()).
-		WithAccessible(true)
+		WithAccessible(true).
+		// Render to stderr so stdout stays clean for command output.
+		WithOutput(os.Stderr)
 	if err := form.Run(); err != nil {
 		return fmt.Errorf("prompt user to confirm: %w", err)
 	}

internal/cli/tui/prompt.go

@@ -25,7 +25,9 @@ func Confirm(title string) (bool, error) {
 				Value(&confirmed),
 		),
 	).WithTheme(ThemeConfirm()).
-		WithAccessible(true)
+		WithAccessible(true).
+		// Render to stderr so stdout stays clean for command output.
+		WithOutput(os.Stderr)
 	if err := form.Run(); err != nil {
 		return false, err
 	}
@@ -51,6 +53,14 @@ func ThemeConfirmDanger() huh.Theme {
 	})
 }
 
+// IsTerminalAvailable reports whether the control terminal (TTY) is available so an interactive TUI can run.
+func IsTerminalAvailable() bool {
+	// Bubbletea interactive programs read keyboard input from stdin and render to stdout (default) or stderr (uncloud),
+	// so both must be terminals. In particular, bubbletea falls back to opening /dev/tty when stdin is not a terminal,
+	// which fails when there is no controlling terminal. See https://github.com/psviderski/uncloud/issues/386
+	return IsStdinTerminal() && IsStderrTerminal()
+}
+
 // IsStdinTerminal checks if the standard input is a terminal (TTY).
 func IsStdinTerminal() bool {
 	return term.IsTerminal(int(os.Stdin.Fd()))
@@ -61,6 +71,11 @@ func IsStdoutTerminal() bool {
 	return term.IsTerminal(int(os.Stdout.Fd()))
 }
 
+// IsStderrTerminal checks if the standard error is a terminal (TTY).
+func IsStderrTerminal() bool {
+	return term.IsTerminal(int(os.Stderr.Fd()))
+}
+
 // TerminalWidth returns the width of the terminal.
 // Returns 0 if stdout is not a terminal or the width cannot be determined.
 func TerminalWidth() int {

internal/cli/tui/spinner.go

@@ -0,0 +1,37 @@
+package tui
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"charm.land/huh/v2/spinner"
+	"charm.land/lipgloss/v2"
+)
+
+// RunSpinner shows an animated spinner that prints title while running action.
+// When the terminal (TTY) is not available, it prints the title as plain text.
+// It renders to stderr so stdout stays clean for command output.
+func RunSpinner(ctx context.Context, title string, action func(ctx context.Context) error) error {
+	// Fall back to plain text when a terminal is not available to avoid the bubbletea /dev/tty error and to keep
+	// escape codes out of redirected output.
+	if !IsTerminalAvailable() {
+		fmt.Fprintln(os.Stderr, title)
+		return action(ctx)
+	}
+
+	return spinner.New().
+		// Leading space offsets the title from the spinner glyph.
+		Title(" " + title).
+		Type(spinner.MiniDot).
+		WithTheme(spinner.ThemeFunc(func(isDark bool) *spinner.Styles {
+			return &spinner.Styles{
+				Spinner: lipgloss.NewStyle().Foreground(lipgloss.Yellow),
+				Title:   lipgloss.NewStyle(),
+			}
+		})).
+		WithOutput(os.Stderr).
+		Context(ctx).
+		ActionWithErr(action).
+		Run()
+}

internal/cli/tui/style.go

@@ -19,6 +19,7 @@ var (
 	BoldYellow = lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Yellow)
 
 	NameStyle = lipgloss.NewStyle().Bold(true).Foreground(lipgloss.Color("152"))
+	URLStyle  = lipgloss.NewStyle().Underline(true).Foreground(lipgloss.BrightBlue)
 )
 
 // FormatImage renders an image reference with the given style, using a faint colon separator for tagged images.

internal/corrosion/client.go

@@ -19,10 +19,10 @@ import (
 const (
 	// http2ConnectTimeout is the maximum amount of time an HTTP2 client will wait for a connection to be established.
 	http2ConnectTimeout = 3 * time.Second
-	// http2MaxRetryTime is the maximum amount of time an HTTP2 client will retry a request.
-	http2MaxRetryTime = 10 * time.Second
-	// resubscribeMaxRetryTime is the maximum amount of time an API client will retry resubscribing to a query after
-	// an error occurs.
+	// http2MaxRetryTime bounds the transport retry of a single request. Kept short so it only absorbs transient
+	// blips. Retrying during a Corrosion outage is the job of the higher-level recovery loops.
+	http2MaxRetryTime = 2 * time.Second
+	// resubscribeMaxRetryTime bounds resubscribing to a query after an error.
 	resubscribeMaxRetryTime = 60 * time.Second
 )
 
@@ -33,21 +33,22 @@ type APIClient struct {
 	newResubBackoff func() backoff.BackOff
 }
 
-// NewAPIClient creates a new Corrosion API client. The client retries on network errors using an exponential backoff
-// policy with a maximum interval of 1 second and a maximum elapsed time of 10 seconds.
-// It automatically resubscribes to active subscriptions if an error occurs using an exponential backoff policy with a
-// maximum interval of 1 second and a maximum elapsed time of 60 seconds.
+// NewAPIClient creates a new Corrosion API client. The bearerToken is sent in the Authorization header of every
+// request to authenticate against Corrosion API.
+//
+// Retries are split by failure mode: the transport briefly retries a single request on transient network errors, while
+// subscriptions resubscribe from the last change ID when their stream breaks and own the wait while Corrosion is down.
+//
 // Use the WithHTTP2Client option to provide a custom HTTP client and the WithResubscribeBackoff option to change the
 // backoff policy for resubscribing to a query.
-func NewAPIClient(addr netip.AddrPort, opts ...APIClientOption) (*APIClient, error) {
+func NewAPIClient(addr netip.AddrPort, bearerToken string, opts ...APIClientOption) (*APIClient, error) {
 	baseURL, err := url.Parse(fmt.Sprintf("http://%s", addr))
 	if err != nil {
 		return nil, fmt.Errorf("invalid URL: %w", err)
 	}
-	c := &APIClient{
-		baseURL: baseURL,
-		client: &http.Client{
-			Transport: &RetryRoundTripper{
+
+	transport := &AuthRoundTripper{
+		Base: &RetryRoundTripper{
 			Base: &http2.Transport{
 				AllowHTTP: true,
 				DialTLSContext: func(ctx context.Context, network, addr string, _ *tls.Config) (net.Conn, error) {
@@ -60,12 +61,15 @@ func NewAPIClient(addr netip.AddrPort, opts ...APIClientOption) (*APIClient, err
 			NewBackoff: func() backoff.BackOff {
 				return backoff.NewExponentialBackOff(
 					backoff.WithInitialInterval(100*time.Millisecond),
-						backoff.WithMaxInterval(1*time.Second),
 					backoff.WithMaxElapsedTime(http2MaxRetryTime),
 				)
 			},
 		},
-		},
+		Token: bearerToken,
+	}
+	c := &APIClient{
+		baseURL: baseURL,
+		client:  &http.Client{Transport: transport},
 		newResubBackoff: func() backoff.BackOff {
 			return backoff.NewExponentialBackOff(
 				backoff.WithInitialInterval(100*time.Millisecond),
@@ -83,6 +87,8 @@ func NewAPIClient(addr netip.AddrPort, opts ...APIClientOption) (*APIClient, err
 
 type APIClientOption func(*APIClient)
 
+// WithHTTP2Client replaces the client's HTTP transport. The provided client bypasses the built-in bearer-token
+// injection, so the caller is responsible for setting the Authorization header.
 func WithHTTP2Client(client *http.Client) APIClientOption {
 	return func(c *APIClient) {
 		c.client = client
@@ -97,6 +103,23 @@ func WithResubscribeBackoff(newBackoff func() backoff.BackOff) APIClientOption {
 	}
 }
 
+// AuthRoundTripper sets the Authorization header on every outgoing request. An empty Token leaves the header untouched.
+type AuthRoundTripper struct {
+	Base  http.RoundTripper
+	Token string
+}
+
+func (rt *AuthRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	if rt.Token == "" {
+		return rt.Base.RoundTrip(req)
+	}
+	// RoundTripper contract: must not mutate the caller's request.
+	req = req.Clone(req.Context())
+	req.Header.Set("Authorization", "Bearer "+rt.Token)
+	return rt.Base.RoundTrip(req)
+}
+
+// RetryRoundTripper retries a single HTTP request on transient network errors using the backoff returned by NewBackoff.
 type RetryRoundTripper struct {
 	Base http.RoundTripper
 	// NewBackoff creates a new backoff policy for each request.
@@ -107,8 +130,7 @@ func (rt *RetryRoundTripper) RoundTrip(req *http.Request) (*http.Response, error
 	roundTrip := func() (*http.Response, error) {
 		resp, err := rt.Base.RoundTrip(req)
 		if err != nil {
-			var opErr *net.OpError
-			if errors.As(err, &opErr) {
+			if _, ok := errors.AsType[*net.OpError](err); ok {
 				// Not certain, but I expect operational errors should generally be retryable.
 				slog.Debug("Retrying corrosion API request due to network error.", "error", err)
 				return nil, err

internal/corrosion/client_test.go

@@ -0,0 +1,60 @@
+package corrosion
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAuthRoundTripper_SetsAuthorizationHeader(t *testing.T) {
+	t.Parallel()
+
+	const token = "test-token-1234567890"
+
+	var gotAuth string
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		gotAuth = r.Header.Get("Authorization")
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer srv.Close()
+
+	rt := &AuthRoundTripper{Base: http.DefaultTransport, Token: token}
+	client := &http.Client{Transport: rt}
+
+	req, err := http.NewRequest(http.MethodGet, srv.URL, nil)
+	require.NoError(t, err)
+
+	resp, err := client.Do(req)
+	require.NoError(t, err)
+	resp.Body.Close()
+
+	assert.Equal(t, "Bearer "+token, gotAuth)
+	// Caller's request must not be mutated by the RoundTripper.
+	assert.Empty(t, req.Header.Get("Authorization"))
+}
+
+func TestAuthRoundTripper_EmptyTokenSkipsHeader(t *testing.T) {
+	t.Parallel()
+
+	var headerSeen bool
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		_, headerSeen = r.Header["Authorization"]
+		w.WriteHeader(http.StatusOK)
+	}))
+	defer srv.Close()
+
+	rt := &AuthRoundTripper{Base: http.DefaultTransport, Token: ""}
+	client := &http.Client{Transport: rt}
+
+	req, err := http.NewRequest(http.MethodGet, srv.URL, nil)
+	require.NoError(t, err)
+
+	resp, err := client.Do(req)
+	require.NoError(t, err)
+	resp.Body.Close()
+
+	assert.False(t, headerSeen, "Authorization header should not be sent when token is empty")
+}

internal/corrosion/subscribe.go

@@ -22,6 +22,10 @@ var (
 	ChangeTypeDelete ChangeType = "delete"
 )
 
+// ErrSubscriptionNotFound is returned when resubscribing to a subscription that Corrosion
+// no longer knows about (HTTP 404).
+var ErrSubscriptionNotFound = errors.New("subscription not found")
+
 type ChangeEvent struct {
 	Type     ChangeType
 	RowID    uint64
@@ -286,10 +290,25 @@ func (c *APIClient) resubscribeWithBackoffFn(id string) func(context.Context, ui
 		return nil
 	}
 	return func(ctx context.Context, fromChange uint64) (*Subscription, error) {
+		boff := backoff.WithContext(c.newResubBackoff(), ctx)
 		return backoff.RetryWithData(func() (*Subscription, error) {
-			slog.Debug("Retrying to resubscribe to Corrosion query.", "id", id, "from_change", fromChange)
-			return c.ResubscribeContext(ctx, id, fromChange)
-		}, c.newResubBackoff())
+			sub, err := c.ResubscribeContext(ctx, id, fromChange)
+			if err != nil {
+				// A gone subscription can never be resubscribed, so stop retrying immediately and let the caller
+				// recover by creating a fresh subscription.
+				if errors.Is(err, ErrSubscriptionNotFound) {
+					slog.Error("Corrosion subscription no longer exists, giving up resubscribing.",
+						"id", id, "from_change", fromChange)
+					return nil, backoff.Permanent(fmt.Errorf("resubscribe to %s: %w", id, err))
+				}
+				// Don't log retries triggered by context cancellation, the backoff will stop immediately.
+				if ctx.Err() == nil {
+					slog.Error("Failed to resubscribe to Corrosion query. Retrying with backoff.",
+						"id", id, "from_change", fromChange, "err", err)
+				}
+			}
+			return sub, err
+		}, boff)
 	}
 }
 
@@ -312,13 +331,38 @@ func (c *APIClient) ResubscribeContext(ctx context.Context, id string, fromChang
 	}
 
 	if resp.StatusCode != http.StatusOK {
+		if resp.StatusCode == http.StatusNotFound {
+			resp.Body.Close()
+			return nil, ErrSubscriptionNotFound
+		}
+
 		respBody, err := io.ReadAll(resp.Body)
 		resp.Body.Close()
 		if err != nil {
 			return nil, fmt.Errorf("read response body: %w", err)
 		}
+
 		return nil, fmt.Errorf("unexpected status code %d: %s", resp.StatusCode, respBody)
 	}
 
+	// Since https://github.com/superfly/corrosion/pull/355, Corrosion treats a resubscription from change 0 like
+	// a fresh subscription: it replays the full query snapshot (a columns event, all rows, and an end-of-query event)
+	// before streaming changes. We don't expose rows in this case, so drain the snapshot here before consuming changes.
+	if fromChange == 0 {
+		rows, err := newRows(ctx, resp.Body, false)
+		if err != nil {
+			resp.Body.Close()
+			return nil, fmt.Errorf("parse resubscribe response: %w", err)
+		}
+		// Drain the replayed rows until the end-of-query event to reach the change stream.
+		for rows.Next() {
+		}
+		if err = rows.Err(); err != nil {
+			resp.Body.Close()
+			return nil, fmt.Errorf("drain resubscribe snapshot: %w", err)
+		}
+		return newSubscription(ctx, id, nil, rows.body, rows.decoder, c.resubscribeWithBackoffFn(id)), nil
+	}
+
 	return newSubscription(ctx, id, nil, resp.Body, nil, c.resubscribeWithBackoffFn(id)), nil
 }

internal/corrosion/subscribe_test.go

@@ -0,0 +1,216 @@
+package corrosion
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"strings"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/cenkalti/backoff/v4"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+// newTestClient builds an APIClient pointed at srv with a fast resubscribe backoff for tests.
+func newTestClient(t *testing.T, srv *httptest.Server) *APIClient {
+	t.Helper()
+
+	baseURL, err := url.Parse(srv.URL)
+	require.NoError(t, err)
+
+	return &APIClient{
+		baseURL: baseURL,
+		client:  srv.Client(),
+		newResubBackoff: func() backoff.BackOff {
+			return backoff.NewExponentialBackOff(
+				backoff.WithInitialInterval(time.Millisecond),
+				backoff.WithMaxInterval(10*time.Millisecond),
+				backoff.WithMaxElapsedTime(5*time.Second),
+			)
+		},
+	}
+}
+
+func flushString(t *testing.T, w http.ResponseWriter, s string) {
+	t.Helper()
+	_, err := w.Write([]byte(s))
+	require.NoError(t, err)
+	w.(http.Flusher).Flush()
+}
+
+// TestSubscription_ResubscribeFromZeroDrainsSnapshot verifies that when the connection drops before any
+// change is seen (lastChangeID == 0) and Corrosion replays the full query snapshot on resubscription from
+// change 0, the change handler drains the snapshot and delivers the subsequent change instead of looping on
+// "expected change event, got: {Columns:...}".
+// The change of behaviour in Corrosion: https://github.com/superfly/corrosion/pull/355
+func TestSubscription_ResubscribeFromZeroDrainsSnapshot(t *testing.T) {
+	t.Parallel()
+
+	const snapshot = `{"columns":["id","info"]}
+{"row":[1,["a","b"]]}
+{"eoq":{"time":1e-7,"change_id":0}}
+`
+
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.Method {
+		case http.MethodPost:
+			// Initial subscription: send the snapshot, then end the stream to force a resubscribe.
+			w.Header().Set("corro-query-id", "test-sub")
+			w.WriteHeader(http.StatusOK)
+			flushString(t, w, snapshot)
+		case http.MethodGet:
+			// Resubscription from change 0: Corrosion v1.0.0+ replays the full snapshot, then changes.
+			require.Equal(t, "0", r.URL.Query().Get("from"))
+			w.Header().Set("corro-query-id", "test-sub")
+			w.WriteHeader(http.StatusOK)
+			flushString(t, w, snapshot+`{"change":["insert",2,["c","d"],1]}`+"\n")
+			// Keep the connection open so the handler doesn't end the stream and trigger another resubscribe.
+			<-r.Context().Done()
+		default:
+			require.FailNow(t, fmt.Sprintf("unexpected request method: %s", r.Method))
+		}
+	}))
+	defer srv.Close()
+
+	client := newTestClient(t, srv)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	sub, err := client.SubscribeContext(ctx, "SELECT id, info FROM machines", nil, false)
+	require.NoError(t, err)
+
+	// Consume the initial rows so Changes can be called.
+	rows := sub.Rows()
+	for rows.Next() {
+	}
+	require.NoError(t, rows.Err())
+
+	changes, err := sub.Changes()
+	require.NoError(t, err)
+
+	select {
+	case change := <-changes:
+		require.NotNil(t, change, "changes channel closed with error: %v", sub.Err())
+		assert.Equal(t, ChangeTypeInsert, change.Type)
+		assert.Equal(t, uint64(2), change.RowID)
+		assert.Equal(t, uint64(1), change.ChangeID)
+	case <-time.After(5 * time.Second):
+		require.FailNow(t, "timed out waiting for a change after resubscribe", sub.Err())
+	}
+}
+
+// TestSubscription_ResubscribeFromNonZeroSkipsSnapshot verifies that a resubscription from a non-zero change
+// streams changes directly, without a replayed snapshot, and the change handler delivers them.
+func TestSubscription_ResubscribeFromNonZeroSkipsSnapshot(t *testing.T) {
+	t.Parallel()
+
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.Method {
+		case http.MethodPost:
+			// Initial subscription with a non-zero last change id, then end the stream to force a resubscribe.
+			w.Header().Set("corro-query-id", "test-sub")
+			w.WriteHeader(http.StatusOK)
+			flushString(t, w, `{"columns":["id","info"]}`+"\n"+
+				`{"row":[1,["a","b"]]}`+"\n"+
+				`{"eoq":{"time":1e-7,"change_id":5}}`+"\n")
+		case http.MethodGet:
+			// Resubscription from change 5: only changes are streamed, no snapshot.
+			require.Equal(t, "5", r.URL.Query().Get("from"))
+			require.False(t, strings.Contains(r.URL.RawQuery, "skip_rows"))
+			w.WriteHeader(http.StatusOK)
+			flushString(t, w, `{"change":["update",1,["a","b2"],6]}`+"\n")
+			<-r.Context().Done()
+		default:
+			require.FailNow(t, fmt.Sprintf("unexpected request method: %s", r.Method))
+		}
+	}))
+	defer srv.Close()
+
+	client := newTestClient(t, srv)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	sub, err := client.SubscribeContext(ctx, "SELECT id, info FROM machines", nil, false)
+	require.NoError(t, err)
+
+	rows := sub.Rows()
+	for rows.Next() {
+	}
+	require.NoError(t, rows.Err())
+
+	changes, err := sub.Changes()
+	require.NoError(t, err)
+
+	select {
+	case change := <-changes:
+		require.NotNil(t, change, "changes channel closed with error: %v", sub.Err())
+		assert.Equal(t, ChangeTypeUpdate, change.Type)
+		assert.Equal(t, uint64(6), change.ChangeID)
+	case <-time.After(5 * time.Second):
+		require.FailNow(t, "timed out waiting for a change after resubscribe", sub.Err())
+	}
+}
+
+// TestSubscription_ResubscribeNotFoundFailsFast verifies that when Corrosion returns 404 to a resubscription
+// (the subscription no longer exists, e.g. after a restart that dropped it), the change handler stops retrying
+// immediately and closes the changes channel with ErrSubscriptionNotFound, instead of retrying for the full
+// backoff window.
+func TestSubscription_ResubscribeNotFoundFailsFast(t *testing.T) {
+	t.Parallel()
+
+	var getCount atomic.Int32
+
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		switch r.Method {
+		case http.MethodPost:
+			// Initial subscription, then end the stream to force a resubscribe.
+			w.Header().Set("corro-query-id", "test-sub")
+			w.WriteHeader(http.StatusOK)
+			flushString(t, w, `{"columns":["id","info"]}`+"\n"+
+				`{"row":[1,["a","b"]]}`+"\n"+
+				`{"eoq":{"time":1e-7,"change_id":5}}`+"\n")
+		case http.MethodGet:
+			// Resubscription: Corrosion no longer knows this subscription.
+			getCount.Add(1)
+			http.Error(w, "", http.StatusNotFound)
+		default:
+			require.FailNow(t, fmt.Sprintf("unexpected request method: %s", r.Method))
+		}
+	}))
+	defer srv.Close()
+
+	client := newTestClient(t, srv)
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	sub, err := client.SubscribeContext(ctx, "SELECT id, info FROM machines", nil, false)
+	require.NoError(t, err)
+
+	rows := sub.Rows()
+	for rows.Next() {
+	}
+	require.NoError(t, rows.Err())
+
+	changes, err := sub.Changes()
+	require.NoError(t, err)
+
+	select {
+	case change := <-changes:
+		// The channel must close (nil change) rather than deliver anything.
+		require.Nil(t, change, "expected the changes channel to close on a gone subscription")
+	case <-time.After(5 * time.Second):
+		require.FailNow(t, "timed out waiting for the changes channel to close")
+	}
+
+	require.ErrorIs(t, sub.Err(), ErrSubscriptionNotFound)
+	// The 404 must not be retried: exactly one GET resubscription request was made.
+	assert.Equal(t, int32(1), getCount.Load())
+}

internal/grpcversion/interceptor.go

@@ -31,8 +31,8 @@ const (
 	//
 	// The two minimums are independent: a client might require a newer daemon for new
 	// features, while that same daemon could still handle requests from older clients.
-	MinClientVersion = "0.0.0"
-	MinServerVersion = "0.0.0"
+	MinClientVersion = "0.20.0"
+	MinServerVersion = "0.20.0"
 
 	ReleaseURL = "https://github.com/psviderski/uncloud/releases/latest"
 )

internal/journal/journal.go

@@ -10,31 +10,11 @@ import (
 	"github.com/psviderski/uncloud/pkg/api"
 )
 
-const (
-	UnitUncloud   = "uncloud"
-	UnitDocker    = "docker"
-	UnitCorrosion = "uncloud-corrosion"
-)
-
-func ValidUnit(unit string) bool {
-	switch unit {
-	case UnitUncloud:
-	case UnitDocker:
-	case UnitCorrosion:
-	default:
-		return false
-	}
-	return true
-}
-
 const journalctl = "journalctl"
 
 var commandContext = exec.CommandContext // allow override for test
 
 func logs(ctx context.Context, unit string, opts api.ServiceLogsOptions) (io.ReadCloser, func() error, error) {
-	if !ValidUnit(unit) {
-		return nil, nil, fmt.Errorf("journal logs: invalid unit: %s", unit)
-	}
 	args := []string{"-u", unit, "--no-hostname"}
 	args = append(args, "-n")
 	if opts.Tail > -1 {

internal/journal/logs.go

@@ -3,7 +3,6 @@ package journal
 import (
 	"bytes"
 	"context"
-	"fmt"
 	"slices"
 	"strconv"
 	"time"
@@ -13,10 +12,6 @@ import (
 
 // Logs streams logs from a service and returns entries via a channel.
 func Logs(ctx context.Context, unit string, opts api.ServiceLogsOptions) (<-chan api.LogEntry, error) {
-	if !ValidUnit(unit) {
-		return nil, fmt.Errorf("journal logs: invalid unit: %s", unit)
-	}
-
 	reader, wait, err := logs(ctx, unit, opts)
 	if err != nil {
 		return nil, err