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Add docker network connect/disconnect to non-running container

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Signed-off-by: Lei Jitang <leijitang@huawei.com>
This commit is contained in:
Lei Jitang 2016-01-11 20:13:39 -05:00
parent 2892de760f
commit 79d4f0f56e
7 changed files with 105 additions and 42 deletions
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83
daemon/container_operations_unix.go
View file

@ -708,13 +708,43 @@ func cleanOperationalData(es *networktypes.EndpointSettings) {
es.MacAddress = ""
}
func (daemon *Daemon) updateNetworkConfig(container *container.Container, idOrName string, updateSettings bool) (libnetwork.Network, error) {
if container.HostConfig.NetworkMode.IsContainer() {
return nil, runconfig.ErrConflictSharedNetwork
}
if containertypes.NetworkMode(idOrName).IsBridge() &&
daemon.configStore.DisableBridge {
container.Config.NetworkDisabled = true
return nil, nil
}
n, err := daemon.FindNetwork(idOrName)
if err != nil {
return nil, err
}
if updateSettings {
if err := daemon.updateNetworkSettings(container, n); err != nil {
return nil, err
}
}
return n, nil
}
// ConnectToNetwork connects a container to a network
func (daemon *Daemon) ConnectToNetwork(container *container.Container, idOrName string, endpointConfig *networktypes.EndpointSettings) error {
if !container.Running {
return derr.ErrorCodeNotRunning.WithArgs(container.ID)
}
if err := daemon.connectToNetwork(container, idOrName, endpointConfig, true); err != nil {
return err
if container.RemovalInProgress || container.Dead {
return derr.ErrorCodeRemovalContainer.WithArgs(container.ID)
}
if _, err := daemon.updateNetworkConfig(container, idOrName, true); err != nil {
return err
}
} else {
if err := daemon.connectToNetwork(container, idOrName, endpointConfig, true); err != nil {
return err
}
}
if err := container.ToDiskLocking(); err != nil {
return fmt.Errorf("Error saving container to disk: %v", err)
@ -723,37 +753,24 @@ func (daemon *Daemon) ConnectToNetwork(container *container.Container, idOrName
}
func (daemon *Daemon) connectToNetwork(container *container.Container, idOrName string, endpointConfig *networktypes.EndpointSettings, updateSettings bool) (err error) {
if container.HostConfig.NetworkMode.IsContainer() {
return runconfig.ErrConflictSharedNetwork
n, err := daemon.updateNetworkConfig(container, idOrName, updateSettings)
if err != nil {
return err
}
if n == nil {
return nil
}
if !containertypes.NetworkMode(idOrName).IsUserDefined() && hasUserDefinedIPAddress(endpointConfig) {
return runconfig.ErrUnsupportedNetworkAndIP
}
if containertypes.NetworkMode(idOrName).IsBridge() &&
daemon.configStore.DisableBridge {
container.Config.NetworkDisabled = true
return nil
}
controller := daemon.netController
n, err := daemon.FindNetwork(idOrName)
if err != nil {
return err
}
if err := validateNetworkingConfig(n, endpointConfig); err != nil {
return err
}
if updateSettings {
if err := daemon.updateNetworkSettings(container, n); err != nil {
return err
}
}
if endpointConfig != nil {
container.NetworkSettings.Networks[n.Name()] = endpointConfig
}
@ -817,16 +834,22 @@ func (daemon *Daemon) connectToNetwork(container *container.Container, idOrName
// DisconnectFromNetwork disconnects container from network n.
func (daemon *Daemon) DisconnectFromNetwork(container *container.Container, n libnetwork.Network) error {
if !container.Running {
return derr.ErrorCodeNotRunning.WithArgs(container.ID)
}
if container.HostConfig.NetworkMode.IsHost() && containertypes.NetworkMode(n.Type()).IsHost() {
return runconfig.ErrConflictHostNetwork
}
if err := disconnectFromNetwork(container, n); err != nil {
return err
if !container.Running {
if container.RemovalInProgress || container.Dead {
return derr.ErrorCodeRemovalContainer.WithArgs(container.ID)
}
if _, ok := container.NetworkSettings.Networks[n.Name()]; ok {
delete(container.NetworkSettings.Networks, n.Name())
} else {
return fmt.Errorf("container %s is not connected to the network %s", container.ID, n.Name())
}
} else {
if err := disconnectFromNetwork(container, n); err != nil {
return err
}
}
if err := container.ToDiskLocking(); err != nil {

2
docs/reference/commandline/network_connect.md
View file

@ -16,7 +16,7 @@ parent = "smn_cli"
--help Print usage
Connects a running container to a network. You can connect a container by name
Connects a container to a network. You can connect a container by name
or by ID. Once connected, the container can communicate with other containers in
the same network.

5
docs/userguide/networking/work-with-networks.md
View file

@ -327,9 +327,8 @@ PING 172.17.0.2 (172.17.0.2): 56 data bytes
```
To connect a container to a network, the container must be running. If you stop
a container and inspect a network it belongs to, you won't see that container.
The `docker network inspect` command only shows running containers.
You can connect both running and non-running containers to a network. However,
`docker network inspect` only displays information on running containers.
## Disconnecting containers

9
errors/daemon.go
View file

@ -46,6 +46,15 @@ var (
HTTPStatusCode: http.StatusInternalServerError,
})
// ErrorCodeRemovalContainer is generated when we attempt to connect or disconnect a
// container but it's marked for removal.
ErrorCodeRemovalContainer = errcode.Register(errGroup, errcode.ErrorDescriptor{
Value: "REMOVALCONTAINER",
Message: "Container %s is marked for removal and cannot be connected or disconnected to the network",
Description: "The specified container is marked for removal and cannot be connected or disconnected to the network",
HTTPStatusCode: http.StatusInternalServerError,
})
// ErrorCodePausedContainer is generated when we attempt to attach a
// container but its paused.
ErrorCodePausedContainer = errcode.Register(errGroup, errcode.ErrorDescriptor{

44
integration-cli/docker_cli_network_unix_test.go
View file

@ -448,11 +448,6 @@ func (s *DockerNetworkSuite) TestDockerNetworkConnectDisconnect(c *check.C) {
c.Assert(nr.Name, checker.Equals, "test")
c.Assert(len(nr.Containers), checker.Equals, 0)
// check if network connect fails for inactive containers
dockerCmd(c, "stop", containerID)
_, _, err = dockerCmdWithError("network", "connect", "test", containerID)
c.Assert(err, check.NotNil)
dockerCmd(c, "network", "rm", "test")
assertNwNotAvailable(c, "test")
}
@ -960,7 +955,44 @@ func (s *DockerNetworkSuite) TestDockerNetworkRestartWithMulipleNetworks(c *chec
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"))
c.Assert(networks, checker.Contains, "test", check.Commentf("Should contain 'test' network"))
}
func (s *DockerNetworkSuite) TestDockerNetworkConnectDisconnectToStoppedContainer(c *check.C) {
dockerCmd(c, "network", "create", "test")
dockerCmd(c, "create", "--name=foo", "busybox", "top")
dockerCmd(c, "network", "connect", "test", "foo")
networks, err := inspectField("foo", "NetworkSettings.Networks")
c.Assert(err, checker.IsNil)
c.Assert(networks, checker.Contains, "test", check.Commentf("Should contain 'test' network"))
// Restart docker daemon to test the config has persisted to disk
s.d.Restart()
networks, err = inspectField("foo", "NetworkSettings.Networks")
c.Assert(err, checker.IsNil)
c.Assert(networks, checker.Contains, "test", check.Commentf("Should contain 'test' network"))
// start the container and test if we can ping it from another container in the same network
dockerCmd(c, "start", "foo")
c.Assert(waitRun("foo"), checker.IsNil)
ip, err := inspectField("foo", "NetworkSettings.Networks.test.IPAddress")
ip = strings.TrimSpace(ip)
dockerCmd(c, "run", "--net=test", "busybox", "sh", "-c", fmt.Sprintf("ping -c 1 %s", ip))
dockerCmd(c, "stop", "foo")
// Test disconnect
dockerCmd(c, "network", "disconnect", "test", "foo")
networks, err = inspectField("foo", "NetworkSettings.Networks")
c.Assert(err, checker.IsNil)
c.Assert(networks, checker.Not(checker.Contains), "test", check.Commentf("Should not contain 'test' network"))
// Restart docker daemon to test the config has persisted to disk
s.d.Restart()
networks, err = inspectField("foo", "NetworkSettings.Networks")
c.Assert(err, checker.IsNil)
c.Assert(networks, checker.Not(checker.Contains), "test", check.Commentf("Should not contain 'test' network"))
}
func (s *DockerNetworkSuite) TestDockerNetworkConnectPreferredIP(c *check.C) {

2
man/docker-network-connect.1.md
View file

@ -11,7 +11,7 @@ NETWORK CONTAINER
# DESCRIPTION
Connects a running container to a network. You can connect a container by name
Connects a container to a network. You can connect a container by name
or by ID. Once connected, the container can communicate with other containers in
the same network.

2
man/docker-network-disconnect.1.md
View file

@ -11,7 +11,7 @@ NETWORK CONTAINER
# DESCRIPTION
Disconnects a container from a network. The container must be running to disconnect it from the network.
Disconnects a container from a network.
```bash
$ docker network disconnect multi-host-network container1