@@ -1222,6 +1222,7 @@ func (container *Container) initializeNetworking() error {

 		if err != nil {

 			return err

 		}

+		container.HostnamePath = nc.HostnamePath

 		container.HostsPath = nc.HostsPath

 		container.ResolvConfPath = nc.ResolvConfPath

 		container.Config.Hostname = nc.Config.Hostname

@@ -412,6 +412,31 @@ func TestRunLinkToContainerNetMode(t *testing.T) {

 	logDone("run - link to a container which net mode is container success")

 }

+func TestRunModeNetContainerHostname(t *testing.T) {

+	defer deleteAllContainers()

+	cmd := exec.Command(dockerBinary, "run", "-i", "-d", "--name", "parent", "busybox", "top")

+	out, _, err := runCommandWithOutput(cmd)

+	if err != nil {

+		t.Fatalf("failed to run container: %v, output: %q", err, out)

+	}

+	cmd = exec.Command(dockerBinary, "exec", "parent", "cat", "/etc/hostname")

+	out, _, err = runCommandWithOutput(cmd)

+	if err != nil {

+		t.Fatalf("failed to exec command: %v, output: %q", err, out)

+	}

+

+	cmd = exec.Command(dockerBinary, "run", "--net=container:parent", "busybox", "cat", "/etc/hostname")

+	out1, _, err := runCommandWithOutput(cmd)

+	if err != nil {

+		t.Fatalf("failed to run container: %v, output: %q", err, out1)

+	}

+	if out1 != out {

+		t.Fatal("containers with shared net namespace should have same hostname")

+	}

+

+	logDone("run - containers with shared net namespace have same hostname")

+}

+

 // Regression test for #4741

 func TestRunWithVolumesAsFiles(t *testing.T) {

 	defer deleteAllContainers()