support image label

Signed-off-by: Kay Yan <[email protected]>

Author: yankay

cmd/nerdctl/container_create_linux_test.go

@@ -38,6 +38,19 @@ func TestCreate(t *testing.T) {
 	base.Cmd("logs", tID).AssertOutContains("foo")
 }
 
+func TestCreateWithLabel(t *testing.T) {
+	t.Parallel()
+	base := testutil.NewBase(t)
+	tID := testutil.Identifier(t)
+
+	base.Cmd("create", "--name", tID, "--label", "foo=bar", testutil.NginxAlpineImage, "echo", "foo").AssertOK()
+	defer base.Cmd("rm", "-f", tID).Run()
+	inspect := base.InspectContainer(tID)
+	assert.Equal(base.T, "bar", inspect.Config.Labels["foo"])
+	// the label `maintainer`` is defined by image
+	assert.Equal(base.T, "NGINX Docker Maintainers <[email protected]>", inspect.Config.Labels["maintainer"])
+}
+
 func TestCreateWithMACAddress(t *testing.T) {
 	base := testutil.NewBase(t)
 	tID := testutil.Identifier(t)

pkg/cmd/container/create.go

@@ -234,7 +234,7 @@ func Create(ctx context.Context, client *containerd.Client, args []string, netMa
 	}
 	cOpts = append(cOpts, rtCOpts...)
 
-	lCOpts, err := withContainerLabels(options.Label, options.LabelFile)
+	lCOpts, err := withContainerLabels(options.Label, options.LabelFile, ensuredImage)
 	if err != nil {
 		return nil, nil, err
 	}
@@ -504,7 +504,15 @@ func withNerdctlOCIHook(cmd string, args []string) (oci.SpecOpts, error) {
 	}, nil
 }
 
-func withContainerLabels(label, labelFile []string) ([]containerd.NewContainerOpts, error) {
+func withContainerLabels(label, labelFile []string, ensuredImage *imgutil.EnsuredImage) ([]containerd.NewContainerOpts, error) {
+	var opts []containerd.NewContainerOpts
+
+	// add labels defined by image
+	if ensuredImage != nil {
+		imageLabelOpts := containerd.WithAdditionalContainerLabels(ensuredImage.ImageConfig.Labels)
+		opts = append(opts, imageLabelOpts)
+	}
+
 	labelMap, err := readKVStringsMapfFromLabel(label, labelFile)
 	if err != nil {
 		return nil, err
@@ -517,7 +525,9 @@ func withContainerLabels(label, labelFile []string) ([]containerd.NewContainerOp
 		}
 	}
 	o := containerd.WithAdditionalContainerLabels(labelMap)
-	return []containerd.NewContainerOpts{o}, nil
+	opts = append(opts, o)
+
+	return opts, nil
 }
 
 func readKVStringsMapfFromLabel(label, labelFile []string) (map[string]string, error) {