update network settings on container creating

To make docker inspect return a consistent result of networksettings
for created container and stopped container, it's bettew to update
the network settings on container creating.

Signed-off-by: Lei Jitang <leijitang@huawei.com>

daemon/container_operations_unix.go

@@ -529,6 +529,29 @@ func (daemon *Daemon) updateNetwork(container *container.Container) error {
 	return nil
 }
 
+// updateContainerNetworkSettings update the network settings
+func (daemon *Daemon) updateContainerNetworkSettings(container *container.Container) error {
+	mode := container.HostConfig.NetworkMode
+	if container.Config.NetworkDisabled || mode.IsContainer() {
+		return nil
+	}
+
+	networkName := mode.NetworkName()
+	if mode.IsDefault() {
+		networkName = daemon.netController.Config().Daemon.DefaultNetwork
+	}
+	if mode.IsUserDefined() {
+		n, err := daemon.FindNetwork(networkName)
+		if err != nil {
+			return err
+		}
+		networkName = n.Name()
+	}
+	container.NetworkSettings.Networks = make(map[string]*networktypes.EndpointSettings)
+	container.NetworkSettings.Networks[networkName] = new(networktypes.EndpointSettings)
+	return nil
+}
+
 func (daemon *Daemon) allocateNetwork(container *container.Container) error {
 	controller := daemon.netController
 
@@ -539,24 +562,14 @@ func (daemon *Daemon) allocateNetwork(container *container.Container) error {
 
 	updateSettings := false
 	if len(container.NetworkSettings.Networks) == 0 {
-		mode := container.HostConfig.NetworkMode
-		if container.Config.NetworkDisabled || mode.IsContainer() {
+		if container.Config.NetworkDisabled || container.HostConfig.NetworkMode.IsContainer() {
 			return nil
 		}
 
-		networkName := mode.NetworkName()
-		if mode.IsDefault() {
-			networkName = controller.Config().Daemon.DefaultNetwork
-		}
-		if mode.IsUserDefined() {
-			n, err := daemon.FindNetwork(networkName)
-			if err != nil {
-				return err
-			}
-			networkName = n.Name()
+		err := daemon.updateContainerNetworkSettings(container)
+		if err != nil {
+			return err
 		}
-		container.NetworkSettings.Networks = make(map[string]*networktypes.EndpointSettings)
-		container.NetworkSettings.Networks[networkName] = new(networktypes.EndpointSettings)
 		updateSettings = true
 	}
 

daemon/container_operations_windows.go

@@ -16,6 +16,11 @@ func (daemon *Daemon) setupLinkedContainers(container *container.Container) ([]s
 	return nil, nil
 }
 
+// updateContainerNetworkSettings update the network settings
+func (daemon *Daemon) updateContainerNetworkSettings(container *container.Container) error {
+	return nil
+}
+
 func (daemon *Daemon) initializeNetworking(container *container.Container) error {
 	return nil
 }

daemon/create.go

@@ -106,6 +106,10 @@ func (daemon *Daemon) create(params *ContainerCreateConfig) (retC *container.Con
 		return nil, err
 	}
 
+	if err := daemon.updateContainerNetworkSettings(container); err != nil {
+		return nil, err
+	}
+
 	if err := container.ToDiskLocking(); err != nil {
 		logrus.Errorf("Error saving new container to disk: %v", err)
 		return nil, err

integration-cli/docker_cli_network_unix_test.go

@@ -891,3 +891,22 @@ func (s *DockerNetworkSuite) TestDockerNetworkConnectWithMac(c *check.C) {
 	c.Assert(err, checker.IsNil)
 	c.Assert(strings.TrimSpace(mac2), checker.Not(checker.Equals), strings.TrimSpace(mac1))
 }
+
+func (s *DockerNetworkSuite) TestDockerNetworkInspectCreatedContainer(c *check.C) {
+	dockerCmd(c, "create", "--name", "test", "busybox")
+	networks, err := inspectField("test", "NetworkSettings.Networks")
+	c.Assert(err, checker.IsNil)
+	c.Assert(networks, checker.Contains, "bridge", check.Commentf("Should return 'bridge' network"))
+}
+
+func (s *DockerNetworkSuite) TestDockerNetworkRestartWithMulipleNetworks(c *check.C) {
+	dockerCmd(c, "network", "create", "test")
+	dockerCmd(c, "run", "--name=foo", "-d", "busybox", "top")
+	c.Assert(waitRun("foo"), checker.IsNil)
+	dockerCmd(c, "network", "connect", "test", "foo")
+	dockerCmd(c, "restart", "foo")
+	networks, err := inspectField("foo", "NetworkSettings.Networks")
+	c.Assert(err, checker.IsNil)
+	c.Assert(networks, checker.Contains, "bridge", check.Commentf("Should contain 'bridge' network"))
+	c.Assert(networks, checker.Contains, "test", check.Commentf("Should contain 'test' netwokr"))
+}