diff --git a/cmd/uncloud/caddy/deploy.go b/cmd/uncloud/caddy/deploy.go
index dd99472c..f7886fcc 100644
--- a/cmd/uncloud/caddy/deploy.go
+++ b/cmd/uncloud/caddy/deploy.go
@@ -44,8 +44,8 @@ func NewDeployCommand() *cobra.Command {
 	cmd.Flags().StringVar(&opts.image, "image", "",
 		"Caddy Docker image to deploy. (default caddy:LATEST_VERSION)")
 	cmd.Flags().StringSliceVarP(&opts.machines, "machine", "m", nil,
-		"Machine names to deploy to. Can be specified multiple times or as a comma-separated "+
-			"list of machine names. (default is all machines)")
+		"Machine names or IDs to deploy to. Can be specified multiple times or as a comma-separated "+
+			"list. (default is all machines)")
 	cmd.Flags().StringVarP(
 		&opts.context, "context", "c", "",
 		"Name of the cluster context to deploy to. (default is the current context)",
diff --git a/cmd/uncloud/cbuild.go b/cmd/uncloud/cbuild.go
index da4a768c..a4aa3b9f 100644
--- a/cmd/uncloud/cbuild.go
+++ b/cmd/uncloud/cbuild.go
@@ -2,6 +2,7 @@ package main
 
 import (
 	"context"
+	"errors"
 	"fmt"
 
 	composecli "github.com/compose-spec/compose-go/v2/cli"
@@ -10,20 +11,26 @@ import (
 	"github.com/docker/cli/cli/flags"
 	composeapi "github.com/docker/compose/v2/pkg/api"
 	composev2 "github.com/docker/compose/v2/pkg/compose"
+	"github.com/docker/compose/v2/pkg/progress"
 	"github.com/psviderski/uncloud/internal/cli"
+	"github.com/psviderski/uncloud/pkg/client"
 	"github.com/psviderski/uncloud/pkg/client/compose"
 	"github.com/spf13/cobra"
 )
 
 type buildOptions struct {
-	buildArgs []string
-	check     bool
-	deps      bool
-	files     []string
-	noCache   bool
-	profiles  []string
-	pull      bool
-	services  []string
+	buildArgs    []string
+	check        bool
+	deps         bool
+	files        []string
+	machines     []string
+	noCache      bool
+	profiles     []string
+	pull         bool
+	push         bool
+	pushRegistry bool
+	services     []string
+	context      string
 }
 
 // NewCBuildCommand creates a new command to build images for services from a Compose file.
@@ -32,7 +39,7 @@ func NewCBuildCommand() *cobra.Command {
 	cmd := &cobra.Command{
 		Use:    "cbuild [FLAGS] [SERVICE...]",
 		Short:  "Build services from a Compose file.",
-		Long:   "Build images for services from a Compose file using the Docker Compose library.",
+		Long:   "Build images for services from a Compose file using Docker.",
 		Hidden: true,
 		RunE: func(cmd *cobra.Command, args []string) error {
 			uncli := cmd.Context().Value("cli").(*cli.CLI)
@@ -54,12 +61,24 @@ func NewCBuildCommand() *cobra.Command {
 		"Also build services declared as dependencies of the selected services.")
 	cmd.Flags().StringSliceVarP(&opts.files, "file", "f", nil,
 		"One or more Compose files to build. (default compose.yaml)")
+	cmd.Flags().StringSliceVarP(&opts.machines, "machine", "m", nil,
+		"Machine names or IDs to push the built images to (requires --push).\n"+
+			"Can be specified multiple times or as a comma-separated list. (default is all machines)")
 	cmd.Flags().BoolVar(&opts.noCache, "no-cache", false,
 		"Do not use cache when building images.")
 	cmd.Flags().StringSliceVarP(&opts.profiles, "profile", "p", nil,
 		"One or more Compose profiles to enable.")
 	cmd.Flags().BoolVar(&opts.pull, "pull", false,
 		"Attempt to pull newer versions of the base images before building.")
+	cmd.Flags().BoolVar(&opts.push, "push", false,
+		"Upload the built images to cluster machines after building.\n"+
+			"Use --machine to specify which machines. (default is all machines)")
+	cmd.Flags().BoolVar(&opts.pushRegistry, "push-registry", false,
+		"Upload the built images to registries after building.")
+	cmd.Flags().StringVarP(
+		&opts.context, "context", "c", "",
+		"Name of the cluster context. (default is the current context)",
+	)
 
 	return cmd
 }
@@ -76,7 +95,12 @@ func projectOptsFromCBuildOpts(opts buildOptions) []composecli.ProjectOptionsFn
 }
 
 // runCBuild parses the Compose file(s) and builds the images for selected services.
-func runCBuild(ctx context.Context, _ *cli.CLI, opts buildOptions) error {
+func runCBuild(ctx context.Context, uncli *cli.CLI, opts buildOptions) error {
+	// Validate push flags.
+	if opts.push && opts.pushRegistry {
+		return fmt.Errorf("cannot specify both --push and --push-registry: choose one push target")
+	}
+
 	projOpts := projectOptsFromCBuildOpts(opts)
 	project, err := compose.LoadProject(ctx, opts.files, projOpts...)
 	if err != nil {
@@ -95,12 +119,12 @@ func runCBuild(ctx context.Context, _ *cli.CLI, opts buildOptions) error {
 	// Build service images using Compose implementation.
 	dockerCli, err := command.NewDockerCli()
 	if err != nil {
-		return fmt.Errorf("create docker CLI: %w", err)
+		return fmt.Errorf("create docker client: %w", err)
 	}
 
 	// Initialise the Docker CLI with default options.
 	if err = dockerCli.Initialize(flags.NewClientOptions()); err != nil {
-		return fmt.Errorf("initialize docker CLI: %w", err)
+		return fmt.Errorf("initialise docker client: %w", err)
 	}
 
 	composeService := composev2.NewComposeService(dockerCli)
@@ -110,6 +134,7 @@ func runCBuild(ctx context.Context, _ *cli.CLI, opts buildOptions) error {
 		Deps:     opts.deps,
 		NoCache:  opts.noCache,
 		Pull:     opts.pull,
+		Push:     opts.pushRegistry,
 		Services: opts.services,
 	}
 
@@ -117,5 +142,62 @@ func runCBuild(ctx context.Context, _ *cli.CLI, opts buildOptions) error {
 		return fmt.Errorf("build services: %w", err)
 	}
 
+	// Push images to cluster machines if --push is specified.
+	if opts.push {
+		if err = pushImagesToCluster(ctx, uncli, servicesToBuild, opts.machines); err != nil {
+			return fmt.Errorf("push images to cluster: %w", err)
+		}
+	}
+
 	return nil
 }
+
+// pushImagesToCluster pushes the locally built Docker images for specified services to cluster machines via unregistry.
+func pushImagesToCluster(
+	ctx context.Context,
+	uncli *cli.CLI,
+	services map[string]composetypes.ServiceConfig,
+	machines []string,
+) error {
+	clusterClient, err := uncli.ConnectCluster(ctx, "")
+	if err != nil {
+		return fmt.Errorf("connect to cluster: %w", err)
+	}
+	defer clusterClient.Close()
+
+	machines = cli.ExpandCommaSeparatedValues(machines)
+	pushOpts := client.PushImageOptions{}
+
+	// Special handling for an explicit "all" keyword to push to all machines.
+	if len(machines) == 1 && machines[0] == "all" {
+		pushOpts.AllMachines = true
+	} else if len(machines) > 0 {
+		pushOpts.Machines = machines
+	} else {
+		// Default is to push to all machines in the cluster.
+		pushOpts.AllMachines = true
+	}
+
+	// Push one service image at a time.
+	var errs []error
+	for _, s := range services {
+		if s.Image == "" {
+			// Skip services without an image name (shouldn't happen for services with build config).
+			continue
+		}
+
+		err = progress.RunWithTitle(ctx, func(ctx context.Context) error {
+			if err = clusterClient.PushImage(ctx, s.Image, pushOpts); err != nil {
+				return fmt.Errorf("push image for service '%s': %w", s.Name, err)
+			}
+			return nil
+		}, uncli.ProgressOut(), fmt.Sprintf("Pushing image %s to cluster", s.Image))
+
+		// Collect errors to try pushing all images.
+		if err != nil {
+			errs = append(errs, err)
+		}
+	}
+
+	return errors.Join(errs...)
+}
diff --git a/cmd/uncloud/image/push.go b/cmd/uncloud/image/push.go
index 0a09d6e2..9446677f 100644
--- a/cmd/uncloud/image/push.go
+++ b/cmd/uncloud/image/push.go
@@ -14,8 +14,8 @@ import (
 type pushOptions struct {
 	image    string
 	machines []string
-	context  string
 	platform string
+	context  string
 }
 
 func NewPushCommand() *cobra.Command {
@@ -50,9 +50,8 @@ The image is uploaded to the machine which CLI is connected to (default) or the
 	}
 
 	cmd.Flags().StringSliceVarP(&opts.machines, "machine", "m", nil,
-		"Machine names to push the image to. Can be specified multiple times or as a comma-separated "+
-			"list of machine names.\n"+
-			"Use 'all' to push to all machines. (default is connected machine)")
+		"Machine names or IDs to push the image to. Can be specified multiple times or as a comma-separated list. "+
+			"(default is all machines)")
 	cmd.Flags().StringVar(
 		&opts.platform, "platform", "",
 		"Push a specific platform of a multi-platform image (e.g., linux/amd64, linux/arm64).\n"+
@@ -76,11 +75,14 @@ func push(ctx context.Context, uncli *cli.CLI, opts pushOptions) error {
 	machines := cli.ExpandCommaSeparatedValues(opts.machines)
 	pushOpts := client.PushImageOptions{}
 
-	// Special handling for "all" keyword to push to all machines.
+	// Special handling for an explicit "all" keyword to push to all machines.
 	if len(machines) == 1 && machines[0] == "all" {
 		pushOpts.AllMachines = true
-	} else {
+	} else if len(machines) > 0 {
 		pushOpts.Machines = machines
+	} else {
+		// Default is to push to all machines in the cluster.
+		pushOpts.AllMachines = true
 	}
 
 	if opts.platform != "" {
diff --git a/pkg/client/image.go b/pkg/client/image.go
index f1a5f563..ecf617a6 100644
--- a/pkg/client/image.go
+++ b/pkg/client/image.go
@@ -102,11 +102,11 @@ func (cli *Client) ListImages(ctx context.Context, filter api.ImageFilter) ([]ap
 }
 
 type PushImageOptions struct {
+	// AllMachines pushes the image to all machines in the cluster. Takes precedence over Machines field.
+	AllMachines bool
 	// Machines is a list of machine names or IDs to push the image to. If empty and AllMachines is false,
 	// pushes to the machine the client is connected to.
 	Machines []string
-	// AllMachines pushes the image to all machines in the cluster. Takes precedence over Machines field.
-	AllMachines bool
 	// Platform to push for a multi-platform image. Local Docker must use containerd image store
 	// to support multi-platform images.
 	Platform *ocispec.Platform