Golang libnetwork.Network类代码示例

func buildNetworkResource(nw libnetwork.Network) *types.NetworkResource {
	r := &types.NetworkResource{}
	if nw == nil {
		return r
	}

	info := nw.Info()
	r.Name = nw.Name()
	r.ID = nw.ID()
	r.Scope = info.Scope()
	r.Driver = nw.Type()
	r.EnableIPv6 = info.IPv6Enabled()
	r.Internal = info.Internal()
	r.Options = info.DriverOptions()
	r.Containers = make(map[string]types.EndpointResource)
	buildIpamResources(r, info)
	r.Internal = info.Internal()
	r.Labels = info.Labels()

	epl := nw.Endpoints()
	for _, e := range epl {
		ei := e.Info()
		if ei == nil {
			continue
		}
		sb := ei.Sandbox()
		key := "ep-" + e.ID()
		if sb != nil {
			key = sb.ContainerID()
		}

		r.Containers[key] = buildEndpointResource(e)
	}
	return r
}

func (daemon *Daemon) updateNetworkConfig(container *container.Container, n libnetwork.Network, endpointConfig *networktypes.EndpointSettings, updateSettings bool) error {

	if !containertypes.NetworkMode(n.Name()).IsUserDefined() {
		if hasUserDefinedIPAddress(endpointConfig) && !enableIPOnPredefinedNetwork() {
			return runconfig.ErrUnsupportedNetworkAndIP
		}
		if endpointConfig != nil && len(endpointConfig.Aliases) > 0 && !container.EnableServiceDiscoveryOnDefaultNetwork() {
			return runconfig.ErrUnsupportedNetworkAndAlias
		}
	} else {
		addShortID := true
		shortID := stringid.TruncateID(container.ID)
		for _, alias := range endpointConfig.Aliases {
			if alias == shortID {
				addShortID = false
				break
			}
		}
		if addShortID {
			endpointConfig.Aliases = append(endpointConfig.Aliases, shortID)
		}
	}

	if err := validateNetworkingConfig(n, endpointConfig); err != nil {
		return err
	}

	if updateSettings {
		if err := daemon.updateNetworkSettings(container, n, endpointConfig); err != nil {
			return err
		}
	}
	return nil
}

func (daemon *Daemon) updateNetworkSettings(container *Container, n libnetwork.Network) error {
	if container.NetworkSettings == nil {
		container.NetworkSettings = &network.Settings{Networks: make(map[string]*network.EndpointSettings)}
	}

	if !container.hostConfig.NetworkMode.IsHost() && runconfig.NetworkMode(n.Type()).IsHost() {
		return runconfig.ErrConflictHostNetwork
	}

	for s := range container.NetworkSettings.Networks {
		sn, err := daemon.FindNetwork(s)
		if err != nil {
			continue
		}

		if sn.Name() == n.Name() {
			// Avoid duplicate config
			return nil
		}
		if !runconfig.NetworkMode(sn.Type()).IsPrivate() ||
			!runconfig.NetworkMode(n.Type()).IsPrivate() {
			return runconfig.ErrConflictSharedNetwork
		}
		if runconfig.NetworkMode(sn.Name()).IsNone() ||
			runconfig.NetworkMode(n.Name()).IsNone() {
			return runconfig.ErrConflictNoNetwork
		}
	}
	container.NetworkSettings.Networks[n.Name()] = new(network.EndpointSettings)

	return nil
}

// User specified ip address is acceptable only for networks with user specified subnets.
func validateNetworkingConfig(n libnetwork.Network, epConfig *networktypes.EndpointSettings) error {
	if !hasUserDefinedIPAddress(epConfig) {
		return nil
	}
	_, nwIPv4Configs, nwIPv6Configs := n.Info().IpamConfig()
	for _, s := range []struct {
		ipConfigured  bool
		subnetConfigs []*libnetwork.IpamConf
	}{
		{
			ipConfigured:  len(epConfig.IPAMConfig.IPv4Address) > 0,
			subnetConfigs: nwIPv4Configs,
		},
		{
			ipConfigured:  len(epConfig.IPAMConfig.IPv6Address) > 0,
			subnetConfigs: nwIPv6Configs,
		},
	} {
		if s.ipConfigured {
			foundSubnet := false
			for _, cfg := range s.subnetConfigs {
				if len(cfg.PreferredPool) > 0 {
					foundSubnet = true
					break
				}
			}
			if !foundSubnet {
				return runconfig.ErrUnsupportedNetworkNoSubnetAndIP
			}
		}
	}

	return nil
}

// ForceEndpointDelete deletes an endpoing from a network forcefully
func (daemon *Daemon) ForceEndpointDelete(name string, n libnetwork.Network) error {
	ep, err := n.EndpointByName(name)
	if err != nil {
		return err
	}
	return ep.Delete(true)
}

func buildIpamResources(r *types.NetworkResource, nw libnetwork.Network) {
	id, opts, ipv4conf, ipv6conf := nw.Info().IpamConfig()

	ipv4Info, ipv6Info := nw.Info().IpamInfo()

	r.IPAM.Driver = id

	r.IPAM.Options = opts

	r.IPAM.Config = []network.IPAMConfig{}
	for _, ip4 := range ipv4conf {
		if ip4.PreferredPool == "" {
			continue
		}
		iData := network.IPAMConfig{}
		iData.Subnet = ip4.PreferredPool
		iData.IPRange = ip4.SubPool
		iData.Gateway = ip4.Gateway
		iData.AuxAddress = ip4.AuxAddresses
		r.IPAM.Config = append(r.IPAM.Config, iData)
	}

	if len(r.IPAM.Config) == 0 {
		for _, ip4Info := range ipv4Info {
			iData := network.IPAMConfig{}
			iData.Subnet = ip4Info.IPAMData.Pool.String()
			iData.Gateway = ip4Info.IPAMData.Gateway.String()
			r.IPAM.Config = append(r.IPAM.Config, iData)
		}
	}

	hasIpv6Conf := false
	for _, ip6 := range ipv6conf {
		if ip6.PreferredPool == "" {
			continue
		}
		hasIpv6Conf = true
		iData := network.IPAMConfig{}
		iData.Subnet = ip6.PreferredPool
		iData.IPRange = ip6.SubPool
		iData.Gateway = ip6.Gateway
		iData.AuxAddress = ip6.AuxAddresses
		r.IPAM.Config = append(r.IPAM.Config, iData)
	}

	if !hasIpv6Conf {
		for _, ip6Info := range ipv6Info {
			iData := network.IPAMConfig{}
			iData.Subnet = ip6Info.IPAMData.Pool.String()
			iData.Gateway = ip6Info.IPAMData.Gateway.String()
			r.IPAM.Config = append(r.IPAM.Config, iData)
		}
	}
}

// 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
	}

	return disconnectFromNetwork(container, n)
}

func (container *Container) updateJoinInfo(n libnetwork.Network, ep libnetwork.Endpoint) error {
	epInfo := ep.Info()
	if epInfo == nil {
		// It is not an error to get an empty endpoint info
		return nil
	}
	container.NetworkSettings.Networks[n.Name()].Gateway = epInfo.Gateway().String()
	if epInfo.GatewayIPv6().To16() != nil {
		container.NetworkSettings.Networks[n.Name()].IPv6Gateway = epInfo.GatewayIPv6().String()
	}

	return nil
}

// BuildJoinOptions builds endpoint Join options from a given network.
func (container *Container) BuildJoinOptions(n libnetwork.Network) ([]libnetwork.EndpointOption, error) {
	var joinOptions []libnetwork.EndpointOption
	if epConfig, ok := container.NetworkSettings.Networks[n.Name()]; ok {
		for _, str := range epConfig.Links {
			name, alias, err := runconfigopts.ParseLink(str)
			if err != nil {
				return nil, err
			}
			joinOptions = append(joinOptions, libnetwork.CreateOptionAlias(name, alias))
		}
	}
	return joinOptions, nil
}

func (container *Container) updateNetworkSettings(n libnetwork.Network) error {
	if container.NetworkSettings == nil {
		container.NetworkSettings = &network.Settings{Networks: []string{}}
	}
	settings := container.NetworkSettings

	for _, s := range settings.Networks {
		sn, err := container.daemon.FindNetwork(s)
		if err != nil {
			continue
		}

		if sn.Name() == n.Name() {
			// Avoid duplicate config
			return nil
		}
		if !runconfig.NetworkMode(sn.Type()).IsPrivate() ||
			!runconfig.NetworkMode(n.Type()).IsPrivate() {
			return runconfig.ErrConflictSharedNetwork
		}
		if runconfig.NetworkMode(sn.Name()).IsNone() ||
			runconfig.NetworkMode(n.Name()).IsNone() {
			return runconfig.ErrConflictNoNetwork
		}
	}
	settings.Networks = append(settings.Networks, n.Name())

	return nil
}

// updateContainerNetworkSettings update the network settings
func (daemon *Daemon) updateContainerNetworkSettings(container *container.Container, endpointsConfig map[string]*networktypes.EndpointSettings) error {
	var (
		n   libnetwork.Network
		err 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
		}
		if !container.Managed && n.Info().Dynamic() {
			return errClusterNetworkOnRun(networkName)
		}
		networkName = n.Name()
	}
	if container.NetworkSettings == nil {
		container.NetworkSettings = &network.Settings{}
	}
	if len(endpointsConfig) > 0 {
		container.NetworkSettings.Networks = endpointsConfig
	}
	if container.NetworkSettings.Networks == nil {
		container.NetworkSettings.Networks = make(map[string]*networktypes.EndpointSettings)
		container.NetworkSettings.Networks[networkName] = new(networktypes.EndpointSettings)
	}
	if !mode.IsUserDefined() {
		return nil
	}
	// Make sure to internally store the per network endpoint config by network name
	if _, ok := container.NetworkSettings.Networks[networkName]; ok {
		return nil
	}
	if nwConfig, ok := container.NetworkSettings.Networks[n.ID()]; ok {
		container.NetworkSettings.Networks[networkName] = nwConfig
		delete(container.NetworkSettings.Networks, n.ID())
		return nil
	}

	return nil
}

// DisconnectFromNetwork disconnects a container from a network
func (container *Container) DisconnectFromNetwork(n libnetwork.Network) error {
	if !container.Running {
		return derr.ErrorCodeNotRunning.WithArgs(container.ID)
	}

	if container.hostConfig.NetworkMode.IsHost() && runconfig.NetworkMode(n.Type()).IsHost() {
		return runconfig.ErrConflictHostNetwork
	}

	if err := container.disconnectFromNetwork(n); err != nil {
		return err
	}

	if err := container.toDiskLocking(); err != nil {
		return fmt.Errorf("Error saving container to disk: %v", err)
	}
	return nil
}

func (container *Container) disconnectFromNetwork(n libnetwork.Network) error {
	var (
		ep   libnetwork.Endpoint
		sbox libnetwork.Sandbox
	)

	s := func(current libnetwork.Endpoint) bool {
		if sb := current.Info().Sandbox(); sb != nil {
			if sb.ContainerID() == container.ID {
				ep = current
				sbox = sb
				return true
			}
		}
		return false
	}
	n.WalkEndpoints(s)

	if ep == nil {
		return fmt.Errorf("container %s is not connected to the network", container.ID)
	}

	if err := ep.Leave(sbox); err != nil {
		return fmt.Errorf("container %s failed to leave network %s: %v", container.ID, n.Name(), err)
	}

	if err := ep.Delete(); err != nil {
		return fmt.Errorf("endpoint delete failed for container %s on network %s: %v", container.ID, n.Name(), err)
	}

	delete(container.NetworkSettings.Networks, n.Name())
	return nil
}

// DisconnectFromNetwork disconnects container from network n.
func (daemon *Daemon) DisconnectFromNetwork(container *container.Container, n libnetwork.Network, force bool) error {
	if container.HostConfig.NetworkMode.IsHost() && containertypes.NetworkMode(n.Type()).IsHost() {
		return runconfig.ErrConflictHostNetwork
	}
	if !container.Running {
		if container.RemovalInProgress || container.Dead {
			return errRemovalContainer(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, false); err != nil {
			return err
		}
	}

	if err := container.ToDiskLocking(); err != nil {
		return fmt.Errorf("Error saving container to disk: %v", err)
	}

	attributes := map[string]string{
		"container": container.ID,
	}
	daemon.LogNetworkEventWithAttributes(n, "disconnect", attributes)
	return nil
}

// updateContainerNetworkSettings update the network settings
func (daemon *Daemon) updateContainerNetworkSettings(container *container.Container, endpointsConfig map[string]*networktypes.EndpointSettings) error {
	var (
		n   libnetwork.Network
		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
	}

	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()
	}
	if container.NetworkSettings == nil {
		container.NetworkSettings = &network.Settings{}
	}
	if len(endpointsConfig) > 0 {
		container.NetworkSettings.Networks = endpointsConfig
	}
	if container.NetworkSettings.Networks == nil {
		container.NetworkSettings.Networks = make(map[string]*networktypes.EndpointSettings)
		container.NetworkSettings.Networks[networkName] = new(networktypes.EndpointSettings)
	}
	if !mode.IsUserDefined() {
		return nil
	}
	// Make sure to internally store the per network endpoint config by network name
	if _, ok := container.NetworkSettings.Networks[networkName]; ok {
		return nil
	}
	if nwConfig, ok := container.NetworkSettings.Networks[n.ID()]; ok {
		container.NetworkSettings.Networks[networkName] = nwConfig
		delete(container.NetworkSettings.Networks, n.ID())
		return nil
	}

	return nil
}