func (daemon *Daemon) initNetworkController(config *Config) (libnetwork.NetworkController, error) {
netOptions, err := daemon.networkOptions(config)
if err != nil {
return nil, err
}
//创建controller，具体代码在libnetwork/controller.go中。
//主要注册controller的网络驱动，ip地址管理的驱动。
controller, err := libnetwork.New(netOptions...)
if err != nil {
return nil, fmt.Errorf("error obtaining controller instance: %v", err)
}
// Initialize default network on "null"
if _, err := controller.NewNetwork("null", "none", libnetwork.NetworkOptionPersist(false)); err != nil {
return nil, fmt.Errorf("Error creating default \"null\" network: %v", err)
}
// Initialize default network on "host"
if _, err := controller.NewNetwork("host", "host", libnetwork.NetworkOptionPersist(false)); err != nil {
return nil, fmt.Errorf("Error creating default \"host\" network: %v", err)
}
//查看bridge模式有没有被禁用。
if !config.DisableBridge {
// Initialize default driver "bridge"
//初始化bridge driver。
if err := initBridgeDriver(controller, config); err != nil {
return nil, err
}
}
return controller, nil
}
func (daemon *Daemon) initNetworkController(config *Config) (libnetwork.NetworkController, error) {
netOptions, err := daemon.networkOptions(config)
if err != nil {
return nil, err
}
controller, err := libnetwork.New(netOptions...)
if err != nil {
return nil, fmt.Errorf("error obtaining controller instance: %v", err)
}
// Initialize default network on "null"
if _, err := controller.NewNetwork("null", "none", libnetwork.NetworkOptionPersist(false)); err != nil {
return nil, fmt.Errorf("Error creating default \"null\" network: %v", err)
}
// Initialize default network on "host"
if _, err := controller.NewNetwork("host", "host", libnetwork.NetworkOptionPersist(false)); err != nil {
return nil, fmt.Errorf("Error creating default \"host\" network: %v", err)
}
if !config.DisableBridge {
// Initialize default driver "bridge"
if err := initBridgeDriver(controller, config); err != nil {
return nil, err
}
}
return controller, nil
}
func (daemon *Daemon) initNetworkController(config *Config, activeSandboxes map[string]interface{}) (libnetwork.NetworkController, error) {
netOptions, err := daemon.networkOptions(config, daemon.PluginStore, activeSandboxes)
if err != nil {
return nil, err
}
controller, err := libnetwork.New(netOptions...)
if err != nil {
return nil, fmt.Errorf("error obtaining controller instance: %v", err)
}
if len(activeSandboxes) > 0 {
logrus.Info("There are old running containers, the network config will not take affect")
return controller, nil
}
// Initialize default network on "null"
if n, _ := controller.NetworkByName("none"); n == nil {
if _, err := controller.NewNetwork("null", "none", "", libnetwork.NetworkOptionPersist(true)); err != nil {
return nil, fmt.Errorf("Error creating default \"null\" network: %v", err)
}
}
// Initialize default network on "host"
if n, _ := controller.NetworkByName("host"); n == nil {
if _, err := controller.NewNetwork("host", "host", "", libnetwork.NetworkOptionPersist(true)); err != nil {
return nil, fmt.Errorf("Error creating default \"host\" network: %v", err)
}
}
// Clear stale bridge network
if n, err := controller.NetworkByName("bridge"); err == nil {
if err = n.Delete(); err != nil {
return nil, fmt.Errorf("could not delete the default bridge network: %v", err)
}
}
if !config.DisableBridge {
// Initialize default driver "bridge"
if err := initBridgeDriver(controller, config); err != nil {
return nil, err
}
} else {
removeDefaultBridgeInterface()
}
return controller, nil
}
func (daemon *Daemon) initNetworkController(config *Config, activeSandboxes map[string]interface{}) (libnetwork.NetworkController, error) {
netOptions, err := daemon.networkOptions(config, daemon.PluginStore, activeSandboxes)
if err != nil {
return nil, err
}
controller, err := libnetwork.New(netOptions...)
if err != nil {
return nil, fmt.Errorf("error obtaining controller instance: %v", err)
}
// Initialize default network on "null"
if _, err := controller.NewNetwork("null", "none", "", libnetwork.NetworkOptionPersist(false)); err != nil {
return nil, fmt.Errorf("Error creating default 'null' network: %v", err)
}
if !config.DisableBridge {
// Initialize default driver "bridge"
if err := initBridgeDriver(controller, config); err != nil {
return nil, err
}
}
return controller, nil
}
func createDefaultNetwork(c libnetwork.NetworkController) {
nw := c.Config().Daemon.DefaultNetwork
d := c.Config().Daemon.DefaultDriver
createOptions := []libnetwork.NetworkOption{}
genericOption := options.Generic{}
if nw != "" && d != "" {
// Bridge driver is special due to legacy reasons
if d == "bridge" {
genericOption[netlabel.GenericData] = map[string]interface{}{
"BridgeName": nw,
}
createOptions = append(createOptions,
libnetwork.NetworkOptionGeneric(genericOption),
libnetwork.NetworkOptionPersist(false))
}
_, err := c.NewNetwork(d, nw, createOptions...)
if err != nil {
logrus.Errorf("Error creating default network : %s : %v", nw, err)
}
}
}
func (daemon *Daemon) initNetworkController(config *Config) (libnetwork.NetworkController, error) {
netOptions, err := daemon.networkOptions(config)
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 {
err = v.Delete()
if err != nil {
return nil, err
}
}
}
_, err = controller.NewNetwork("null", "none", libnetwork.NetworkOptionPersist(false))
if err != nil {
return nil, err
}
// 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 {
v.Name = n.Name()
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
// There is only one nat network supported in windows.
// If it exists with a different name add it as the default name
if runconfig.DefaultDaemonNetworkMode() == containertypes.NetworkMode(strings.ToLower(v.Type)) {
name = runconfig.DefaultDaemonNetworkMode().NetworkName()
}
v6Conf := []*libnetwork.IpamConf{}
_, err := controller.NewNetwork(strings.ToLower(v.Type), name,
libnetwork.NetworkOptionGeneric(options.Generic{
netlabel.GenericData: netOption,
}),
libnetwork.NetworkOptionIpam("default", "", v4Conf, v6Conf, nil),
)
if err != nil {
logrus.Errorf("Error occurred when creating network %v", err)
}
}
if !config.DisableBridge {
// Initialize default driver "bridge"
if err := initBridgeDriver(controller, config); err != nil {
return nil, err
}
}
return controller, nil
}
func (daemon *Daemon) createNetwork(create types.NetworkCreateRequest, id string, agent bool) (*types.NetworkCreateResponse, error) {
// If there is a pending ingress network creation wait here
// since ingress network creation can happen via node download
// from manager or task download.
if isIngressNetwork(create.Name) {
defer ingressWait()()
}
if runconfig.IsPreDefinedNetwork(create.Name) && !agent {
err := fmt.Errorf("%s is a pre-defined network and cannot be created", create.Name)
return nil, errors.NewRequestForbiddenError(err)
}
var warning string
nw, err := daemon.GetNetworkByName(create.Name)
if err != nil {
if _, ok := err.(libnetwork.ErrNoSuchNetwork); !ok {
return nil, err
}
}
if nw != nil {
if create.CheckDuplicate {
return nil, libnetwork.NetworkNameError(create.Name)
}
warning = fmt.Sprintf("Network with name %s (id : %s) already exists", nw.Name(), nw.ID())
}
c := daemon.netController
driver := create.Driver
if driver == "" {
driver = c.Config().Daemon.DefaultDriver
}
nwOptions := []libnetwork.NetworkOption{
libnetwork.NetworkOptionEnableIPv6(create.EnableIPv6),
libnetwork.NetworkOptionDriverOpts(create.Options),
libnetwork.NetworkOptionLabels(create.Labels),
}
if create.IPAM != nil {
ipam := create.IPAM
v4Conf, v6Conf, err := getIpamConfig(ipam.Config)
if err != nil {
return nil, err
}
nwOptions = append(nwOptions, libnetwork.NetworkOptionIpam(ipam.Driver, "", v4Conf, v6Conf, ipam.Options))
}
if create.Internal {
nwOptions = append(nwOptions, libnetwork.NetworkOptionInternalNetwork())
}
if agent {
nwOptions = append(nwOptions, libnetwork.NetworkOptionDynamic())
nwOptions = append(nwOptions, libnetwork.NetworkOptionPersist(false))
}
if isIngressNetwork(create.Name) {
nwOptions = append(nwOptions, libnetwork.NetworkOptionIngress())
}
n, err := c.NewNetwork(driver, create.Name, id, nwOptions...)
if err != nil {
return nil, err
}
daemon.LogNetworkEvent(n, "create")
return &types.NetworkCreateResponse{
ID: n.ID(),
Warning: warning,
}, nil
}
func initBridgeDriver(controller libnetwork.NetworkController, config *Config) error {
netOption := options.Generic{
"BridgeName": config.Bridge.Iface,
"DefaultBridge": true,
"Mtu": config.Mtu,
"EnableIPMasquerade": config.Bridge.EnableIPMasq,
"EnableICC": config.Bridge.InterContainerCommunication,
}
if config.Bridge.IP != "" {
ip, bipNet, err := net.ParseCIDR(config.Bridge.IP)
if err != nil {
return err
}
bipNet.IP = ip
netOption["AddressIPv4"] = bipNet
}
if config.Bridge.FixedCIDR != "" {
_, fCIDR, err := net.ParseCIDR(config.Bridge.FixedCIDR)
if err != nil {
return err
}
netOption["FixedCIDR"] = fCIDR
}
if config.Bridge.FixedCIDRv6 != "" {
_, fCIDRv6, err := net.ParseCIDR(config.Bridge.FixedCIDRv6)
if err != nil {
return err
}
netOption["FixedCIDRv6"] = fCIDRv6
}
if config.Bridge.DefaultGatewayIPv4 != nil {
netOption["DefaultGatewayIPv4"] = config.Bridge.DefaultGatewayIPv4
}
if config.Bridge.DefaultGatewayIPv6 != nil {
netOption["DefaultGatewayIPv6"] = config.Bridge.DefaultGatewayIPv6
}
// --ip processing
if config.Bridge.DefaultIP != nil {
netOption["DefaultBindingIP"] = config.Bridge.DefaultIP
}
// Initialize default network on "bridge" with the same name
_, err := controller.NewNetwork("bridge", "bridge",
libnetwork.NetworkOptionGeneric(options.Generic{
netlabel.GenericData: netOption,
netlabel.EnableIPv6: config.Bridge.EnableIPv6,
}),
libnetwork.NetworkOptionPersist(false))
if err != nil {
return fmt.Errorf("Error creating default \"bridge\" network: %v", err)
}
return nil
}
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()
defaultNetworkExists = true
}
v6Conf := []*libnetwork.IpamConf{}
_, err := controller.NewNetwork(strings.ToLower(v.Type), name, "",
libnetwork.NetworkOptionGeneric(options.Generic{
netlabel.GenericData: netOption,
}),
libnetwork.NetworkOptionIpam("default", "", v4Conf, v6Conf, nil),
)
if err != nil {
logrus.Errorf("Error occurred when creating network %v", err)
}
}
if !config.DisableBridge {
// Initialize default driver "bridge"
if err := initBridgeDriver(controller, config); err != nil {
return nil, err
}
}
return controller, nil
}