Golang libnetwork.NetworkOptionDeferIPv6Alloc函数代码示例

// Testing IPV6 from MAC address
func TestBridgeIpv6FromMac(t *testing.T) {
	if !testutils.IsRunningInContainer() {
		defer testutils.SetupTestOSContext(t)()
	}

	netOption := options.Generic{
		netlabel.GenericData: options.Generic{
			"BridgeName":         "testipv6mac",
			"EnableICC":          true,
			"EnableIPMasquerade": true,
		},
	}
	ipamV4ConfList := []*libnetwork.IpamConf{{PreferredPool: "192.168.100.0/24", Gateway: "192.168.100.1"}}
	ipamV6ConfList := []*libnetwork.IpamConf{{PreferredPool: "fe90::/64", Gateway: "fe90::22"}}

	network, err := controller.NewNetwork(bridgeNetType, "testipv6mac", "",
		libnetwork.NetworkOptionGeneric(netOption),
		libnetwork.NetworkOptionEnableIPv6(true),
		libnetwork.NetworkOptionIpam(ipamapi.DefaultIPAM, "", ipamV4ConfList, ipamV6ConfList, nil),
		libnetwork.NetworkOptionDeferIPv6Alloc(true))
	if err != nil {
		t.Fatal(err)
	}

	mac := net.HardwareAddr{0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff}
	epOption := options.Generic{netlabel.MacAddress: mac}

	ep, err := network.CreateEndpoint("testep", libnetwork.EndpointOptionGeneric(epOption))
	if err != nil {
		t.Fatal(err)
	}

	iface := ep.Info().Iface()
	if !bytes.Equal(iface.MacAddress(), mac) {
		t.Fatalf("Unexpected mac address: %v", iface.MacAddress())
	}

	ip, expIP, _ := net.ParseCIDR("fe90::aabb:ccdd:eeff/64")
	expIP.IP = ip
	if !types.CompareIPNet(expIP, iface.AddressIPv6()) {
		t.Fatalf("Expected %v. Got: %v", expIP, iface.AddressIPv6())
	}

	if err := ep.Delete(false); err != nil {
		t.Fatal(err)
	}

	if err := network.Delete(); err != nil {
		t.Fatal(err)
	}
}

//.........这里部分代码省略.........
	}
	netOption := map[string]string{
		bridge.BridgeName:         bridgeName,
		bridge.DefaultBridge:      strconv.FormatBool(true),
		netlabel.DriverMTU:        strconv.Itoa(config.Mtu),
		bridge.EnableIPMasquerade: strconv.FormatBool(config.Bridge.EnableIPMasq),
		bridge.EnableICC:          strconv.FormatBool(config.Bridge.InterContainerCommunication),
	}

	// --ip processing
	if config.Bridge.DefaultIP != nil {
		netOption[bridge.DefaultBindingIP] = config.Bridge.DefaultIP.String()
	}

	ipamV4Conf := libnetwork.IpamConf{}

	ipamV4Conf.AuxAddresses = make(map[string]string)

	if nw, _, err := ipamutils.ElectInterfaceAddresses(bridgeName); err == nil {
		ipamV4Conf.PreferredPool = nw.String()
		hip, _ := types.GetHostPartIP(nw.IP, nw.Mask)
		if hip.IsGlobalUnicast() {
			ipamV4Conf.Gateway = nw.IP.String()
		}
	}

	if config.Bridge.IP != "" {
		ipamV4Conf.PreferredPool = config.Bridge.IP
		ip, _, err := net.ParseCIDR(config.Bridge.IP)
		if err != nil {
			return err
		}
		ipamV4Conf.Gateway = ip.String()
	} else if bridgeName == bridge.DefaultBridgeName && ipamV4Conf.PreferredPool != "" {
		logrus.Infof("Default bridge (%s) is assigned with an IP address %s. Daemon option --bip can be used to set a preferred IP address", bridgeName, ipamV4Conf.PreferredPool)
	}

	if config.Bridge.FixedCIDR != "" {
		_, fCIDR, err := net.ParseCIDR(config.Bridge.FixedCIDR)
		if err != nil {
			return err
		}

		ipamV4Conf.SubPool = fCIDR.String()
	}

	if config.Bridge.DefaultGatewayIPv4 != nil {
		ipamV4Conf.AuxAddresses["DefaultGatewayIPv4"] = config.Bridge.DefaultGatewayIPv4.String()
	}

	var (
		ipamV6Conf     *libnetwork.IpamConf
		deferIPv6Alloc bool
	)
	if config.Bridge.FixedCIDRv6 != "" {
		_, fCIDRv6, err := net.ParseCIDR(config.Bridge.FixedCIDRv6)
		if err != nil {
			return err
		}

		// In case user has specified the daemon flag --fixed-cidr-v6 and the passed network has
		// at least 48 host bits, we need to guarantee the current behavior where the containers'
		// IPv6 addresses will be constructed based on the containers' interface MAC address.
		// We do so by telling libnetwork to defer the IPv6 address allocation for the endpoints
		// on this network until after the driver has created the endpoint and returned the
		// constructed address. Libnetwork will then reserve this address with the ipam driver.
		ones, _ := fCIDRv6.Mask.Size()
		deferIPv6Alloc = ones <= 80

		if ipamV6Conf == nil {
			ipamV6Conf = &libnetwork.IpamConf{AuxAddresses: make(map[string]string)}
		}
		ipamV6Conf.PreferredPool = fCIDRv6.String()
	}

	if config.Bridge.DefaultGatewayIPv6 != nil {
		if ipamV6Conf == nil {
			ipamV6Conf = &libnetwork.IpamConf{AuxAddresses: make(map[string]string)}
		}
		ipamV6Conf.AuxAddresses["DefaultGatewayIPv6"] = config.Bridge.DefaultGatewayIPv6.String()
	}

	v4Conf := []*libnetwork.IpamConf{&ipamV4Conf}
	v6Conf := []*libnetwork.IpamConf{}
	if ipamV6Conf != nil {
		v6Conf = append(v6Conf, ipamV6Conf)
	}
	// 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.NetworkOptionIpam("default", "", v4Conf, v6Conf, nil),
		libnetwork.NetworkOptionDeferIPv6Alloc(deferIPv6Alloc))
	if err != nil {
		return fmt.Errorf("Error creating default \"bridge\" network: %v", err)
	}
	return nil
}

func initBridgeDriver(controller libnetwork.NetworkController, config *Config) error {
	if n, err := controller.NetworkByName("bridge"); err == nil {
		if err = n.Delete(); err != nil {
			return fmt.Errorf("could not delete the default bridge network: %v", err)
		}
	}

	bridgeName := bridge.DefaultBridgeName
	if config.bridgeConfig.Iface != "" {
		bridgeName = config.bridgeConfig.Iface
	}
	netOption := map[string]string{
		bridge.BridgeName:    bridgeName,
		bridge.DefaultBridge: strconv.FormatBool(true),
		netlabel.DriverMTU:   strconv.Itoa(config.Mtu),
		bridge.EnableICC:     strconv.FormatBool(config.bridgeConfig.InterContainerCommunication),
	}

	// --ip processing
	if config.bridgeConfig.DefaultIP != nil {
		netOption[bridge.DefaultBindingIP] = config.bridgeConfig.DefaultIP.String()
	}

	var ipamV4Conf *libnetwork.IpamConf

	ipamV4Conf = &libnetwork.IpamConf{AuxAddresses: make(map[string]string)}

	nwList, _, err := netutils.ElectInterfaceAddresses(bridgeName)
	if err != nil {
		return errors.Wrap(err, "list bridge addresses failed")
	}

	nw := nwList[0]
	if len(nwList) > 1 && config.bridgeConfig.FixedCIDR != "" {
		_, fCIDR, err := net.ParseCIDR(config.bridgeConfig.FixedCIDR)
		if err != nil {
			return errors.Wrap(err, "parse CIDR failed")
		}
		// Iterate through in case there are multiple addresses for the bridge
		for _, entry := range nwList {
			if fCIDR.Contains(entry.IP) {
				nw = entry
				break
			}
		}
	}

	ipamV4Conf.PreferredPool = lntypes.GetIPNetCanonical(nw).String()
	hip, _ := lntypes.GetHostPartIP(nw.IP, nw.Mask)
	if hip.IsGlobalUnicast() {
		ipamV4Conf.Gateway = nw.IP.String()
	}

	if config.bridgeConfig.IP != "" {
		ipamV4Conf.PreferredPool = config.bridgeConfig.IP
		ip, _, err := net.ParseCIDR(config.bridgeConfig.IP)
		if err != nil {
			return err
		}
		ipamV4Conf.Gateway = ip.String()
	} else if bridgeName == bridge.DefaultBridgeName && ipamV4Conf.PreferredPool != "" {
		logrus.Infof("Default bridge (%s) is assigned with an IP address %s. Daemon option --bip can be used to set a preferred IP address", bridgeName, ipamV4Conf.PreferredPool)
	}

	if config.bridgeConfig.FixedCIDR != "" {
		_, fCIDR, err := net.ParseCIDR(config.bridgeConfig.FixedCIDR)
		if err != nil {
			return err
		}

		ipamV4Conf.SubPool = fCIDR.String()
	}

	if config.bridgeConfig.DefaultGatewayIPv4 != nil {
		ipamV4Conf.AuxAddresses["DefaultGatewayIPv4"] = config.bridgeConfig.DefaultGatewayIPv4.String()
	}

	v4Conf := []*libnetwork.IpamConf{ipamV4Conf}
	v6Conf := []*libnetwork.IpamConf{}

	// Initialize default network on "bridge" with the same name
	_, err = controller.NewNetwork("bridge", "bridge", "",
		libnetwork.NetworkOptionDriverOpts(netOption),
		libnetwork.NetworkOptionIpam("default", "", v4Conf, v6Conf, nil),
		libnetwork.NetworkOptionDeferIPv6Alloc(false))
	if err != nil {
		return fmt.Errorf("Error creating default 'bridge' network: %v", err)
	}
	return nil
}

//.........这里部分代码省略.........
	nw := nwList[0]
	if len(nwList) > 1 && config.bridgeConfig.FixedCIDR != "" {
		_, fCIDR, err := net.ParseCIDR(config.bridgeConfig.FixedCIDR)
		if err != nil {
			return errors.Wrap(err, "parse CIDR failed")
		}
		// Iterate through in case there are multiple addresses for the bridge
		for _, entry := range nwList {
			if fCIDR.Contains(entry.IP) {
				nw = entry
				break
			}
		}
	}

	ipamV4Conf.PreferredPool = lntypes.GetIPNetCanonical(nw).String()
	hip, _ := lntypes.GetHostPartIP(nw.IP, nw.Mask)
	if hip.IsGlobalUnicast() {
		ipamV4Conf.Gateway = nw.IP.String()
	}

	if config.bridgeConfig.IP != "" {
		ipamV4Conf.PreferredPool = config.bridgeConfig.IP
		ip, _, err := net.ParseCIDR(config.bridgeConfig.IP)
		if err != nil {
			return err
		}
		ipamV4Conf.Gateway = ip.String()
	} else if bridgeName == bridge.DefaultBridgeName && ipamV4Conf.PreferredPool != "" {
		logrus.Infof("Default bridge (%s) is assigned with an IP address %s. Daemon option --bip can be used to set a preferred IP address", bridgeName, ipamV4Conf.PreferredPool)
	}

	if config.bridgeConfig.FixedCIDR != "" {
		_, fCIDR, err := net.ParseCIDR(config.bridgeConfig.FixedCIDR)
		if err != nil {
			return err
		}

		ipamV4Conf.SubPool = fCIDR.String()
	}

	if config.bridgeConfig.DefaultGatewayIPv4 != nil {
		ipamV4Conf.AuxAddresses["DefaultGatewayIPv4"] = config.bridgeConfig.DefaultGatewayIPv4.String()
	}

	var deferIPv6Alloc bool
	if config.bridgeConfig.FixedCIDRv6 != "" {
		_, fCIDRv6, err := net.ParseCIDR(config.bridgeConfig.FixedCIDRv6)
		if err != nil {
			return err
		}

		// In case user has specified the daemon flag --fixed-cidr-v6 and the passed network has
		// at least 48 host bits, we need to guarantee the current behavior where the containers'
		// IPv6 addresses will be constructed based on the containers' interface MAC address.
		// We do so by telling libnetwork to defer the IPv6 address allocation for the endpoints
		// on this network until after the driver has created the endpoint and returned the
		// constructed address. Libnetwork will then reserve this address with the ipam driver.
		ones, _ := fCIDRv6.Mask.Size()
		deferIPv6Alloc = ones <= 80

		if ipamV6Conf == nil {
			ipamV6Conf = &libnetwork.IpamConf{AuxAddresses: make(map[string]string)}
		}
		ipamV6Conf.PreferredPool = fCIDRv6.String()

		// In case the --fixed-cidr-v6 is specified and the current docker0 bridge IPv6
		// address belongs to the same network, we need to inform libnetwork about it, so
		// that it can be reserved with IPAM and it will not be given away to somebody else
		for _, nw6 := range nw6List {
			if fCIDRv6.Contains(nw6.IP) {
				ipamV6Conf.Gateway = nw6.IP.String()
				break
			}
		}
	}

	if config.bridgeConfig.DefaultGatewayIPv6 != nil {
		if ipamV6Conf == nil {
			ipamV6Conf = &libnetwork.IpamConf{AuxAddresses: make(map[string]string)}
		}
		ipamV6Conf.AuxAddresses["DefaultGatewayIPv6"] = config.bridgeConfig.DefaultGatewayIPv6.String()
	}

	v4Conf := []*libnetwork.IpamConf{ipamV4Conf}
	v6Conf := []*libnetwork.IpamConf{}
	if ipamV6Conf != nil {
		v6Conf = append(v6Conf, ipamV6Conf)
	}
	// Initialize default network on "bridge" with the same name
	_, err = controller.NewNetwork("bridge", "bridge", "",
		libnetwork.NetworkOptionEnableIPv6(config.bridgeConfig.EnableIPv6),
		libnetwork.NetworkOptionDriverOpts(netOption),
		libnetwork.NetworkOptionIpam("default", "", v4Conf, v6Conf, nil),
		libnetwork.NetworkOptionDeferIPv6Alloc(deferIPv6Alloc))
	if err != nil {
		return fmt.Errorf("Error creating default \"bridge\" network: %v", err)
	}
	return nil
}

func TestEndpointJoin(t *testing.T) {
	if !testutils.IsRunningInContainer() {
		defer testutils.SetupTestOSContext(t)()
	}

	// Create network 1 and add 2 endpoint: ep11, ep12
	netOption := options.Generic{
		netlabel.GenericData: options.Generic{
			"BridgeName":         "testnetwork1",
			"EnableICC":          true,
			"EnableIPMasquerade": true,
		},
	}
	ipamV6ConfList := []*libnetwork.IpamConf{{PreferredPool: "fe90::/64", Gateway: "fe90::22"}}
	n1, err := controller.NewNetwork(bridgeNetType, "testnetwork1", "",
		libnetwork.NetworkOptionGeneric(netOption),
		libnetwork.NetworkOptionEnableIPv6(true),
		libnetwork.NetworkOptionIpam(ipamapi.DefaultIPAM, "", nil, ipamV6ConfList, nil),
		libnetwork.NetworkOptionDeferIPv6Alloc(true))
	if err != nil {
		t.Fatal(err)
	}
	defer func() {
		if err := n1.Delete(); err != nil {
			t.Fatal(err)
		}
	}()

	ep1, err := n1.CreateEndpoint("ep1")
	if err != nil {
		t.Fatal(err)
	}
	defer func() {
		if err := ep1.Delete(false); err != nil {
			t.Fatal(err)
		}
	}()

	// Validate if ep.Info() only gives me IP address info and not names and gateway during CreateEndpoint()
	info := ep1.Info()
	iface := info.Iface()
	if iface.Address() != nil && iface.Address().IP.To4() == nil {
		t.Fatalf("Invalid IP address returned: %v", iface.Address())
	}
	if iface.AddressIPv6() != nil && iface.AddressIPv6().IP == nil {
		t.Fatalf("Invalid IPv6 address returned: %v", iface.Address())
	}

	if len(info.Gateway()) != 0 {
		t.Fatalf("Expected empty gateway for an empty endpoint. Instead found a gateway: %v", info.Gateway())
	}
	if len(info.GatewayIPv6()) != 0 {
		t.Fatalf("Expected empty gateway for an empty ipv6 endpoint. Instead found a gateway: %v", info.GatewayIPv6())
	}

	if info.Sandbox() != nil {
		t.Fatalf("Expected an empty sandbox key for an empty endpoint. Instead found a non-empty sandbox key: %s", info.Sandbox().Key())
	}

	// test invalid joins
	err = ep1.Join(nil)
	if err == nil {
		t.Fatalf("Expected to fail join with nil Sandbox")
	}
	if _, ok := err.(types.BadRequestError); !ok {
		t.Fatalf("Unexpected error type returned: %T", err)
	}

	fsbx := &fakeSandbox{}
	if err = ep1.Join(fsbx); err == nil {
		t.Fatalf("Expected to fail join with invalid Sandbox")
	}
	if _, ok := err.(types.BadRequestError); !ok {
		t.Fatalf("Unexpected error type returned: %T", err)
	}

	sb, err := controller.NewSandbox(containerID,
		libnetwork.OptionHostname("test"),
		libnetwork.OptionDomainname("docker.io"),
		libnetwork.OptionExtraHost("web", "192.168.0.1"))
	if err != nil {
		t.Fatal(err)
	}

	defer func() {
		if err := sb.Delete(); err != nil {
			t.Fatal(err)
		}
	}()

	err = ep1.Join(sb)
	if err != nil {
		t.Fatal(err)
	}
	defer func() {
		err = ep1.Leave(sb)
		if err != nil {
			t.Fatal(err)
		}
	}()
//.........这里部分代码省略.........