Golang Network.Info方法代码示例

// 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
}

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

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

	epl := nw.Endpoints()
	for _, e := range epl {
		ei := e.Info()
		if ei == nil {
			continue
		}
		sb := ei.Sandbox()
		if sb == nil {
			continue
		}

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

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

	r.Name = nw.Name()
	r.ID = nw.ID()
	r.Scope = nw.Info().Scope()
	r.Driver = nw.Type()
	r.Containers = make(map[string]types.EndpointResource)
	r.Labels = nw.Info().Labels()
	buildIpamResources(r, nw)

	epl := nw.Endpoints()
	for _, e := range epl {
		sb := e.Info().Sandbox()
		if sb == nil {
			continue
		}

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

func (daemon *Daemon) disconnectFromNetwork(container *container.Container, n libnetwork.Network, force bool) error {
	var (
		ep   libnetwork.Endpoint
		sbox libnetwork.Sandbox
	)

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

	if ep == nil && force {
		epName := strings.TrimPrefix(container.Name, "/")
		ep, err := n.EndpointByName(epName)
		if err != nil {
			return err
		}
		return ep.Delete(force)
	}

	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)
	}

	container.NetworkSettings.Ports = getPortMapInfo(sbox)

	if err := ep.Delete(false); 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())

	if daemon.clusterProvider != nil && n.Info().Dynamic() && !container.Managed {
		if err := daemon.clusterProvider.DetachNetwork(n.Name(), container.ID); err != nil {
			logrus.Warnf("error detaching from network %s: %v", n.Name(), err)
			if err := daemon.clusterProvider.DetachNetwork(n.ID(), container.ID); err != nil {
				logrus.Warnf("error detaching from network %s: %v", n.ID(), err)
			}
		}
	}

	return nil
}

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)
		}
	}
}

// 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
}

func (n *networkRouter) 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.Created = info.Created()
	r.Scope = info.Scope()
	if n.clusterProvider.IsManager() {
		if _, err := n.clusterProvider.GetNetwork(nw.Name()); err == nil {
			r.Scope = "swarm"
		}
	} else if info.Dynamic() {
		r.Scope = "swarm"
	}
	r.Driver = nw.Type()
	r.EnableIPv6 = info.IPv6Enabled()
	r.Internal = info.Internal()
	r.Attachable = info.Attachable()
	r.Options = info.DriverOptions()
	r.Containers = make(map[string]types.EndpointResource)
	buildIpamResources(r, info)
	r.Labels = info.Labels()

	peers := info.Peers()
	if len(peers) != 0 {
		r.Peers = buildPeerInfoResources(peers)
	}

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

		r.Containers[key] = buildEndpointResource(tmpID, e.Name(), ei)
	}
	return r
}

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

	r.IPAM.Driver = id

	r.IPAM.Config = []network.IPAMConfig{}
	for _, ip4 := range ipv4conf {
		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)
	}

	for _, ip6 := range ipv6conf {
		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)
	}
}

// BuildCreateEndpointOptions builds endpoint options from a given network.
func (container *Container) BuildCreateEndpointOptions(n libnetwork.Network, epConfig *networktypes.EndpointSettings, sb libnetwork.Sandbox, daemonDNS []string) ([]libnetwork.EndpointOption, error) {
	var (
		bindings      = make(nat.PortMap)
		pbList        []types.PortBinding
		exposeList    []types.TransportPort
		createOptions []libnetwork.EndpointOption
	)

	defaultNetName := runconfig.DefaultDaemonNetworkMode().NetworkName()

	if (!container.EnableServiceDiscoveryOnDefaultNetwork() && n.Name() == defaultNetName) ||
		container.NetworkSettings.IsAnonymousEndpoint {
		createOptions = append(createOptions, libnetwork.CreateOptionAnonymous())
	}

	if epConfig != nil {
		ipam := epConfig.IPAMConfig
		if ipam != nil && (ipam.IPv4Address != "" || ipam.IPv6Address != "" || len(ipam.LinkLocalIPs) > 0) {
			var ipList []net.IP
			for _, ips := range ipam.LinkLocalIPs {
				if ip := net.ParseIP(ips); ip != nil {
					ipList = append(ipList, ip)
				}
			}
			createOptions = append(createOptions,
				libnetwork.CreateOptionIpam(net.ParseIP(ipam.IPv4Address), net.ParseIP(ipam.IPv6Address), ipList, nil))
		}

		for _, alias := range epConfig.Aliases {
			createOptions = append(createOptions, libnetwork.CreateOptionMyAlias(alias))
		}
	}

	if container.NetworkSettings.Service != nil {
		svcCfg := container.NetworkSettings.Service

		var vip string
		if svcCfg.VirtualAddresses[n.ID()] != nil {
			vip = svcCfg.VirtualAddresses[n.ID()].IPv4
		}

		var portConfigs []*libnetwork.PortConfig
		for _, portConfig := range svcCfg.ExposedPorts {
			portConfigs = append(portConfigs, &libnetwork.PortConfig{
				Name:          portConfig.Name,
				Protocol:      libnetwork.PortConfig_Protocol(portConfig.Protocol),
				TargetPort:    portConfig.TargetPort,
				PublishedPort: portConfig.PublishedPort,
			})
		}

		createOptions = append(createOptions, libnetwork.CreateOptionService(svcCfg.Name, svcCfg.ID, net.ParseIP(vip), portConfigs, svcCfg.Aliases[n.ID()]))
	}

	if !containertypes.NetworkMode(n.Name()).IsUserDefined() {
		createOptions = append(createOptions, libnetwork.CreateOptionDisableResolution())
	}

	// configs that are applicable only for the endpoint in the network
	// to which container was connected to on docker run.
	// Ideally all these network-specific endpoint configurations must be moved under
	// container.NetworkSettings.Networks[n.Name()]
	if n.Name() == container.HostConfig.NetworkMode.NetworkName() ||
		(n.Name() == defaultNetName && container.HostConfig.NetworkMode.IsDefault()) {
		if container.Config.MacAddress != "" {
			mac, err := net.ParseMAC(container.Config.MacAddress)
			if err != nil {
				return nil, err
			}

			genericOption := options.Generic{
				netlabel.MacAddress: mac,
			}

			createOptions = append(createOptions, libnetwork.EndpointOptionGeneric(genericOption))
		}
	}

	// Port-mapping rules belong to the container & applicable only to non-internal networks
	portmaps := GetSandboxPortMapInfo(sb)
	if n.Info().Internal() || len(portmaps) > 0 {
		return createOptions, nil
	}

	if container.HostConfig.PortBindings != nil {
		for p, b := range container.HostConfig.PortBindings {
			bindings[p] = []nat.PortBinding{}
			for _, bb := range b {
				bindings[p] = append(bindings[p], nat.PortBinding{
					HostIP:   bb.HostIP,
					HostPort: bb.HostPort,
				})
			}
		}
	}

	portSpecs := container.Config.ExposedPorts
	ports := make([]nat.Port, len(portSpecs))
	var i int
//.........这里部分代码省略.........

// BuildCreateEndpointOptions builds endpoint options from a given network.
func (container *Container) BuildCreateEndpointOptions(n libnetwork.Network, epConfig *network.EndpointSettings, sb libnetwork.Sandbox) ([]libnetwork.EndpointOption, error) {
	var (
		portSpecs     = make(nat.PortSet)
		bindings      = make(nat.PortMap)
		pbList        []types.PortBinding
		exposeList    []types.TransportPort
		createOptions []libnetwork.EndpointOption
	)

	if n.Name() == "bridge" || container.NetworkSettings.IsAnonymousEndpoint {
		createOptions = append(createOptions, libnetwork.CreateOptionAnonymous())
	}

	if epConfig != nil {
		ipam := epConfig.IPAMConfig
		if ipam != nil && (ipam.IPv4Address != "" || ipam.IPv6Address != "") {
			createOptions = append(createOptions,
				libnetwork.CreateOptionIpam(net.ParseIP(ipam.IPv4Address), net.ParseIP(ipam.IPv6Address), nil))
		}

		for _, alias := range epConfig.Aliases {
			createOptions = append(createOptions, libnetwork.CreateOptionMyAlias(alias))
		}
	}

	if !containertypes.NetworkMode(n.Name()).IsUserDefined() {
		createOptions = append(createOptions, libnetwork.CreateOptionDisableResolution())
	}

	// configs that are applicable only for the endpoint in the network
	// to which container was connected to on docker run.
	// Ideally all these network-specific endpoint configurations must be moved under
	// container.NetworkSettings.Networks[n.Name()]
	if n.Name() == container.HostConfig.NetworkMode.NetworkName() ||
		(n.Name() == "bridge" && container.HostConfig.NetworkMode.IsDefault()) {
		if container.Config.MacAddress != "" {
			mac, err := net.ParseMAC(container.Config.MacAddress)
			if err != nil {
				return nil, err
			}

			genericOption := options.Generic{
				netlabel.MacAddress: mac,
			}

			createOptions = append(createOptions, libnetwork.EndpointOptionGeneric(genericOption))
		}
	}

	// Port-mapping rules belong to the container & applicable only to non-internal networks
	portmaps := getSandboxPortMapInfo(sb)
	if n.Info().Internal() || len(portmaps) > 0 {
		return createOptions, nil
	}

	if container.Config.ExposedPorts != nil {
		portSpecs = container.Config.ExposedPorts
	}

	if container.HostConfig.PortBindings != nil {
		for p, b := range container.HostConfig.PortBindings {
			bindings[p] = []nat.PortBinding{}
			for _, bb := range b {
				bindings[p] = append(bindings[p], nat.PortBinding{
					HostIP:   bb.HostIP,
					HostPort: bb.HostPort,
				})
			}
		}
	}

	ports := make([]nat.Port, len(portSpecs))
	var i int
	for p := range portSpecs {
		ports[i] = p
		i++
	}
	nat.SortPortMap(ports, bindings)
	for _, port := range ports {
		expose := types.TransportPort{}
		expose.Proto = types.ParseProtocol(port.Proto())
		expose.Port = uint16(port.Int())
		exposeList = append(exposeList, expose)

		pb := types.PortBinding{Port: expose.Port, Proto: expose.Proto}
		binding := bindings[port]
		for i := 0; i < len(binding); i++ {
			pbCopy := pb.GetCopy()
			newP, err := nat.NewPort(nat.SplitProtoPort(binding[i].HostPort))
			var portStart, portEnd int
			if err == nil {
				portStart, portEnd, err = newP.Range()
			}
			if err != nil {
				return nil, derr.ErrorCodeHostPort.WithArgs(binding[i].HostPort, err)
			}
			pbCopy.HostPort = uint16(portStart)
			pbCopy.HostPortEnd = uint16(portEnd)
			pbCopy.HostIP = net.ParseIP(binding[i].HostIP)
//.........这里部分代码省略.........

func (daemon *Daemon) initNetworkController(config *Config, activeSandboxes map[string]interface{}) (libnetwork.NetworkController, error) {
	netOptions, err := daemon.networkOptions(config, nil, nil)
	if err != nil {
		return nil, err
	}
	controller, err := libnetwork.New(netOptions...)
	if err != nil {
		return nil, fmt.Errorf("error obtaining controller instance: %v", err)
	}

	hnsresponse, err := hcsshim.HNSListNetworkRequest("GET", "", "")
	if err != nil {
		return nil, err
	}

	// Remove networks not present in HNS
	for _, v := range controller.Networks() {
		options := v.Info().DriverOptions()
		hnsid := options[winlibnetwork.HNSID]
		found := false

		for _, v := range hnsresponse {
			if v.Id == hnsid {
				found = true
				break
			}
		}

		if !found {
			// global networks should not be deleted by local HNS
			if v.Info().Scope() != datastore.GlobalScope {
				err = v.Delete()
				if err != nil {
					logrus.Errorf("Error occurred when removing network %v", err)
				}
			}
		}
	}

	_, err = controller.NewNetwork("null", "none", "", libnetwork.NetworkOptionPersist(false))
	if err != nil {
		return nil, err
	}

	defaultNetworkExists := false

	if network, err := controller.NetworkByName(runconfig.DefaultDaemonNetworkMode().NetworkName()); err == nil {
		options := network.Info().DriverOptions()
		for _, v := range hnsresponse {
			if options[winlibnetwork.HNSID] == v.Id {
				defaultNetworkExists = true
				break
			}
		}
	}

	// discover and add HNS networks to windows
	// network that exist are removed and added again
	for _, v := range hnsresponse {
		var n libnetwork.Network
		s := func(current libnetwork.Network) bool {
			options := current.Info().DriverOptions()
			if options[winlibnetwork.HNSID] == v.Id {
				n = current
				return true
			}
			return false
		}

		controller.WalkNetworks(s)
		if n != nil {
			// global networks should not be deleted by local HNS
			if n.Info().Scope() == datastore.GlobalScope {
				continue
			}
			v.Name = n.Name()
			// This will not cause network delete from HNS as the network
			// is not yet populated in the libnetwork windows driver
			n.Delete()
		}

		netOption := map[string]string{
			winlibnetwork.NetworkName: v.Name,
			winlibnetwork.HNSID:       v.Id,
		}

		v4Conf := []*libnetwork.IpamConf{}
		for _, subnet := range v.Subnets {
			ipamV4Conf := libnetwork.IpamConf{}
			ipamV4Conf.PreferredPool = subnet.AddressPrefix
			ipamV4Conf.Gateway = subnet.GatewayAddress
			v4Conf = append(v4Conf, &ipamV4Conf)
		}

		name := v.Name

		// If there is no nat network create one from the first NAT network
		// encountered
		if !defaultNetworkExists && runconfig.DefaultDaemonNetworkMode() == containertypes.NetworkMode(strings.ToLower(v.Type)) {
			name = runconfig.DefaultDaemonNetworkMode().NetworkName()
//.........这里部分代码省略.........