func (daemon *Daemon) connectToNetwork(container *container.Container, idOrName string, endpointConfig *networktypes.EndpointSettings, updateSettings bool) (err error) {
if container.HostConfig.NetworkMode.IsContainer() {
return runconfig.ErrConflictSharedNetwork
}
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
}
ep, err := container.GetEndpointInNetwork(n)
if err == nil {
return fmt.Errorf("Conflict. A container with name %q is already connected to network %s.", strings.TrimPrefix(container.Name, "/"), idOrName)
}
if _, ok := err.(libnetwork.ErrNoSuchEndpoint); !ok {
return err
}
createOptions, err := container.BuildCreateEndpointOptions(n)
if err != nil {
return err
}
endpointName := strings.TrimPrefix(container.Name, "/")
ep, err = n.CreateEndpoint(endpointName, createOptions...)
if err != nil {
return err
}
defer func() {
if err != nil {
if e := ep.Delete(); e != nil {
logrus.Warnf("Could not rollback container connection to network %s", idOrName)
}
}
}()
if err := daemon.updateEndpointNetworkSettings(container, n, ep); err != nil {
return err
}
sb := daemon.getNetworkSandbox(container)
if sb == nil {
options, err := daemon.buildSandboxOptions(container, n)
if err != nil {
return err
}
sb, err = controller.NewSandbox(container.ID, options...)
if err != nil {
return err
}
container.UpdateSandboxNetworkSettings(sb)
}
if err := ep.Join(sb); err != nil {
return err
}
if err := container.UpdateJoinInfo(n, ep); err != nil {
return derr.ErrorCodeJoinInfo.WithArgs(err)
}
daemon.LogNetworkEventWithAttributes(n, "connect", map[string]string{"container": container.ID})
return nil
}
func (daemon *Daemon) connectToNetwork(container *container.Container, idOrName string, endpointConfig *networktypes.EndpointSettings, updateSettings bool) (err error) {
// TODO Windows: Remove this once TP4 builds are not supported
// Windows TP4 build don't support libnetwork and in that case
// daemon.netController will be nil
if daemon.netController == nil {
return nil
}
n, err := daemon.updateNetworkConfig(container, idOrName, endpointConfig, updateSettings)
if err != nil {
return err
}
if n == nil {
return nil
}
controller := daemon.netController
sb := daemon.getNetworkSandbox(container)
createOptions, err := container.BuildCreateEndpointOptions(n, endpointConfig, sb)
if err != nil {
return err
}
endpointName := strings.TrimPrefix(container.Name, "/")
ep, err := n.CreateEndpoint(endpointName, createOptions...)
if err != nil {
return err
}
defer func() {
if err != nil {
if e := ep.Delete(false); e != nil {
logrus.Warnf("Could not rollback container connection to network %s", idOrName)
}
}
}()
if endpointConfig != nil {
container.NetworkSettings.Networks[n.Name()] = endpointConfig
}
if err := daemon.updateEndpointNetworkSettings(container, n, ep); err != nil {
return err
}
if sb == nil {
options, err := daemon.buildSandboxOptions(container, n)
if err != nil {
return err
}
sb, err = controller.NewSandbox(container.ID, options...)
if err != nil {
return err
}
container.UpdateSandboxNetworkSettings(sb)
}
joinOptions, err := container.BuildJoinOptions(n)
if err != nil {
return err
}
if err := ep.Join(sb, joinOptions...); err != nil {
return err
}
if err := container.UpdateJoinInfo(n, ep); err != nil {
return fmt.Errorf("Updating join info failed: %v", err)
}
daemon.LogNetworkEventWithAttributes(n, "connect", map[string]string{"container": container.ID})
return nil
}
func (daemon *Daemon) connectToNetwork(container *container.Container, idOrName string, updateSettings bool) (err error) {
if container.HostConfig.NetworkMode.IsContainer() {
return runconfig.ErrConflictSharedNetwork
}
if runconfig.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 updateSettings {
if err := daemon.updateNetworkSettings(container, n); err != nil {
return err
}
}
ep, err := container.GetEndpointInNetwork(n)
if err == nil {
return fmt.Errorf("Conflict. A container with name %q is already connected to network %s.", strings.TrimPrefix(container.Name, "/"), idOrName)
}
if _, ok := err.(libnetwork.ErrNoSuchEndpoint); !ok {
return err
}
createOptions, err := container.BuildCreateEndpointOptions(n)
if err != nil {
return err
}
endpointName := strings.TrimPrefix(container.Name, "/")
ep, err = n.CreateEndpoint(endpointName, createOptions...)
if err != nil {
return err
}
defer func() {
if err != nil {
if e := ep.Delete(); e != nil {
logrus.Warnf("Could not rollback container connection to network %s", idOrName)
}
}
}()
if err := daemon.updateEndpointNetworkSettings(container, n, ep); err != nil {
return err
}
sb := daemon.getNetworkSandbox(container)
if sb == nil {
options, err := daemon.buildSandboxOptions(container, n)
if err != nil {
return err
}
sb, err = controller.NewSandbox(container.ID, options...)
if err != nil {
return err
}
container.UpdateSandboxNetworkSettings(sb)
}
if err := ep.Join(sb); err != nil {
return err
}
if err := container.UpdateJoinInfo(n, ep); err != nil {
return derr.ErrorCodeJoinInfo.WithArgs(err)
}
return nil
}
func (daemon *Daemon) connectToNetwork(container *container.Container, idOrName string, endpointConfig *networktypes.EndpointSettings, updateSettings bool) (err error) {
n, err := daemon.updateNetworkConfig(container, idOrName, endpointConfig, updateSettings)
if err != nil {
return err
}
if n == nil {
return nil
}
controller := daemon.netController
sb := daemon.getNetworkSandbox(container)
createOptions, err := container.BuildCreateEndpointOptions(n, endpointConfig, sb)
if err != nil {
return err
}
endpointName := strings.TrimPrefix(container.Name, "/")
ep, err := n.CreateEndpoint(endpointName, createOptions...)
if err != nil {
return err
}
defer func() {
if err != nil {
if e := ep.Delete(false); e != nil {
logrus.Warnf("Could not rollback container connection to network %s", idOrName)
}
}
}()
if endpointConfig != nil {
container.NetworkSettings.Networks[n.Name()] = endpointConfig
}
if err := daemon.updateEndpointNetworkSettings(container, n, ep); err != nil {
return err
}
if sb == nil {
options, err := daemon.buildSandboxOptions(container, n)
if err != nil {
return err
}
sb, err = controller.NewSandbox(container.ID, options...)
if err != nil {
return err
}
container.UpdateSandboxNetworkSettings(sb)
}
joinOptions, err := container.BuildJoinOptions(n)
if err != nil {
return err
}
if err := ep.Join(sb, joinOptions...); err != nil {
return err
}
if err := container.UpdateJoinInfo(n, ep); err != nil {
return derr.ErrorCodeJoinInfo.WithArgs(err)
}
daemon.LogNetworkEventWithAttributes(n, "connect", map[string]string{"container": container.ID})
return nil
}
func (daemon *Daemon) connectToNetwork(container *container.Container, idOrName string, endpointConfig *networktypes.EndpointSettings, updateSettings bool) (err error) {
start := time.Now()
if container.HostConfig.NetworkMode.IsContainer() {
return runconfig.ErrConflictSharedNetwork
}
if containertypes.NetworkMode(idOrName).IsBridge() &&
daemon.configStore.DisableBridge {
container.Config.NetworkDisabled = true
return nil
}
if endpointConfig == nil {
endpointConfig = &networktypes.EndpointSettings{}
}
n, config, err := daemon.findAndAttachNetwork(container, idOrName, endpointConfig)
if err != nil {
return err
}
if n == nil {
return nil
}
var operIPAM bool
if config != nil {
if epConfig, ok := config.EndpointsConfig[n.Name()]; ok {
if endpointConfig.IPAMConfig == nil ||
(endpointConfig.IPAMConfig.IPv4Address == "" &&
endpointConfig.IPAMConfig.IPv6Address == "" &&
len(endpointConfig.IPAMConfig.LinkLocalIPs) == 0) {
operIPAM = true
}
// copy IPAMConfig and NetworkID from epConfig via AttachNetwork
endpointConfig.IPAMConfig = epConfig.IPAMConfig
endpointConfig.NetworkID = epConfig.NetworkID
}
}
err = daemon.updateNetworkConfig(container, n, endpointConfig, updateSettings)
if err != nil {
return err
}
controller := daemon.netController
sb := daemon.getNetworkSandbox(container)
createOptions, err := container.BuildCreateEndpointOptions(n, endpointConfig, sb, daemon.configStore.DNS)
if err != nil {
return err
}
endpointName := strings.TrimPrefix(container.Name, "/")
ep, err := n.CreateEndpoint(endpointName, createOptions...)
if err != nil {
return err
}
defer func() {
if err != nil {
if e := ep.Delete(false); e != nil {
logrus.Warnf("Could not rollback container connection to network %s", idOrName)
}
}
}()
container.NetworkSettings.Networks[n.Name()] = &network.EndpointSettings{
EndpointSettings: endpointConfig,
IPAMOperational: operIPAM,
}
if _, ok := container.NetworkSettings.Networks[n.ID()]; ok {
delete(container.NetworkSettings.Networks, n.ID())
}
if err := daemon.updateEndpointNetworkSettings(container, n, ep); err != nil {
return err
}
if sb == nil {
options, err := daemon.buildSandboxOptions(container)
if err != nil {
return err
}
sb, err = controller.NewSandbox(container.ID, options...)
if err != nil {
return err
}
container.UpdateSandboxNetworkSettings(sb)
}
joinOptions, err := container.BuildJoinOptions(n)
if err != nil {
return err
}
if err := ep.Join(sb, joinOptions...); err != nil {
return err
}
if err := container.UpdateJoinInfo(n, ep); err != nil {
return fmt.Errorf("Updating join info failed: %v", err)
}
container.NetworkSettings.Ports = getPortMapInfo(sb)
daemon.LogNetworkEventWithAttributes(n, "connect", map[string]string{"container": container.ID})
networkActions.WithValues("connect").UpdateSince(start)
return nil
}
//对每一个网络进行加入。
func (daemon *Daemon) connectToNetwork(container *container.Container, idOrName string, endpointConfig *networktypes.EndpointSettings, updateSettings bool) (err error) {
// TODO Windows: Remove this once TP4 builds are not supported
// Windows TP4 build don't support libnetwork and in that case
// daemon.netController will be nil
if daemon.netController == nil {
return nil
}
//这一步就更新容器的网路配置了吗？应该还没有吧。
//返回的是network对象。
n, err := daemon.updateNetworkConfig(container, idOrName, endpointConfig, updateSettings)
if err != nil {
return err
}
if n == nil {
return nil
}
controller := daemon.netController
//获取容器的sandbox。sandbox是一个这样的结构：
/*
type sandbox struct {
id string
containerID string
config containerConfig
extDNS []string
osSbox osl.Sandbox
controller *controller
resolver Resolver
resolverOnce sync.Once
refCnt int
endpoints epHeap
epPriority map[string]int
joinLeaveDone chan struct{}
dbIndex uint64
dbExists bool
isStub bool
inDelete bool
sync.Mutex
}
*/
//创建沙盒？
sb := daemon.getNetworkSandbox(container)
//貌似在这一步就会创建容器相应的IP地址等信息了。
createOptions, err := container.BuildCreateEndpointOptions(n, endpointConfig, sb)
if err != nil {
return err
}
endpointName := strings.TrimPrefix(container.Name, "/")
//调用Plugin的CreateEndpoint方法创建endpoint。
//这里的n是一个Network接口。network的createEndpoint会调用addEndpoint方法，
//addEndpoint方法会调用具体的driver，比如bridge driver的createEndpoint方法。
//在宿主机上真实的创建endpoint。同时，这个endpoint是和network关联的，比如说
//bridge模式下，创建endpoint就是创建veth设备，并且在这一步骤里面，veth设备的
//一端就已经连接到了bridge上。
ep, err := n.CreateEndpoint(endpointName, createOptions...)
if err != nil {
return err
}
defer func() {
if err != nil {
if e := ep.Delete(false); e != nil {
logrus.Warnf("Could not rollback container connection to network %s", idOrName)
}
}
}()
//更新容器的endpoint配置。
if endpointConfig != nil {
container.NetworkSettings.Networks[n.Name()] = endpointConfig
}
//这个是要更新谁？
if err := daemon.updateEndpointNetworkSettings(container, n, ep); err != nil {
return err
}
//什么情况下sb会是空的？
if sb == nil {
options, err := daemon.buildSandboxOptions(container, n)
if err != nil {
return err
}
//创建新的沙盒。
sb, err = controller.NewSandbox(container.ID, options...)
if err != nil {
return err
}
container.UpdateSandboxNetworkSettings(sb)
}
//？
joinOptions, err := container.BuildJoinOptions(n)
if err != nil {
return err
}
//将沙盒和endpoint连接起来。每一个沙盒对应一个容器。
if err := ep.Join(sb, joinOptions...); err != nil {
return err
}
if err := container.UpdateJoinInfo(n, ep); err != nil {
return fmt.Errorf("Updating join info failed: %v", err)
}
//更新容器的ports信息。
container.NetworkSettings.Ports = getPortMapInfo(sb)
daemon.LogNetworkEventWithAttributes(n, "connect", map[string]string{"container": container.ID})
return nil
}