Merge pull request #121 from nishanttotla/digest-pinning-stack-deploy

Enable client side digest pinning for stack deploy
Upstream-commit: 4d980880f3
Component: cli

components/cli/cli/compose/convert/service.go

@@ -17,7 +17,11 @@ import (
 	"github.com/pkg/errors"
 )
 
-const defaultNetwork = "default"
+const (
+	defaultNetwork = "default"
+	// LabelImage is the label used to store image name provided in the compose file
+	LabelImage = "com.docker.stack.image"
+)
 
 // Services from compose-file types to engine API types
 func Services(
@@ -158,6 +162,9 @@ func Service(
 		UpdateConfig: convertUpdateConfig(service.Deploy.UpdateConfig),
 	}
 
+	// add an image label to serviceSpec
+	serviceSpec.Labels[LabelImage] = service.Image
+
 	// ServiceSpec.Networks is deprecated and should not have been used by
 	// this package. It is possible to update TaskTemplate.Networks, but it
 	// is not possible to update ServiceSpec.Networks. Unfortunately, we