added app labels to container metadata

Added 2 labels to the containers when they are deployed by docker app:
- com.docker.app.namespace: same as the com.docker.stack.namespace
- com.docker.app.version: version of docker app used for the deploy

These have been added so that Docker Desktop can differentiate between
docker app deployments vs docker stack services.

Signed-off-by: Nick Adcock <nick.adcock@docker.com>

cmd/cnab-run/install.go

@@ -14,6 +14,7 @@ import (
 	"github.com/docker/cli/cli/command/stack"
 	"github.com/docker/cli/cli/command/stack/options"
 	"github.com/docker/cli/cli/command/stack/swarm"
+	composetypes "github.com/docker/cli/cli/compose/types"
 	"github.com/pkg/errors"
 	"github.com/spf13/pflag"
 )
@@ -50,6 +51,7 @@ func installAction(instanceName string) error {
 	if err != nil {
 		return err
 	}
+	addAppLabels(rendered, instanceName)
 	if err := os.Chdir(app.Path); err != nil {
 		return err
 	}
@@ -84,3 +86,14 @@ func getBundleImageMap() (map[string]bundle.Image, error) {
 	}
 	return result, nil
 }
+
+func addAppLabels(rendered *composetypes.Config, instanceName string) {
+	for i, service := range rendered.Services {
+		if service.Labels == nil {
+			service.Labels = map[string]string{}
+		}
+		service.Labels[internal.LabelAppNamespace] = instanceName
+		service.Labels[internal.LabelAppVersion] = internal.Version
+		rendered.Services[i] = service
+	}
+}

e2e/commands_test.go

@@ -230,6 +230,7 @@ func testDockerAppLifecycle(t *testing.T, useBindMount bool) {
 			fmt.Sprintf("Creating service %s_api", appName),
 			fmt.Sprintf("Creating service %s_web", appName),
 		})
+	assertAppLabels(t, &cmd, appName, "db")
 
 	// List the installed application
 	cmd.Command = dockerCli.Command("app", "ls")
@@ -254,6 +255,7 @@ func testDockerAppLifecycle(t *testing.T, useBindMount bool) {
 			fmt.Sprintf("Updating service %s_api", appName),
 			fmt.Sprintf("Updating service %s_web", appName),
 		})
+	assertAppLabels(t, &cmd, appName, "db")
 
 	// Uninstall the application
 	cmd.Command = dockerCli.Command("app", "rm", appName)
@@ -405,6 +407,15 @@ func initializeDockerAppEnvironment(t *testing.T, cmd *icmd.Cmd, tmpDir *fs.Dir,
 	icmd.RunCmd(*cmd).Assert(t, icmd.Success)
 }
 
+func assertAppLabels(t *testing.T, cmd *icmd.Cmd, appName, containerName string) {
+	cmd.Command = dockerCli.Command("inspect", fmt.Sprintf("%s_%s", appName, containerName))
+	checkContains(t, icmd.RunCmd(*cmd).Assert(t, icmd.Success).Combined(),
+		[]string{
+			fmt.Sprintf(`"%s": "%s"`, internal.LabelAppNamespace, appName),
+			fmt.Sprintf(`"%s": ".+"`, internal.LabelAppVersion),
+		})
+}
+
 func checkContains(t *testing.T, combined string, expectedLines []string) {
 	for _, expected := range expectedLines {
 		exp := regexp.MustCompile(expected)

internal/names.go

@@ -69,6 +69,12 @@ const (
 	// DockerInspectFormatEnvVar is the environment variable set by the CNAB runtime to select
 	// the inspect output format.
 	DockerInspectFormatEnvVar = "DOCKER_INSPECT_FORMAT"
+
+	labelAppPrefix = "com.docker.app."
+	// LabelAppNamespace is the label used to track app resources
+	LabelAppNamespace = labelAppPrefix + "namespace"
+	// LabelAppVersion is the label used to identify what version of docker app was used to create the app
+	LabelAppVersion = labelAppPrefix + "version"
 )
 
 var (