Golang glog.Infof函数代码示例

func NewNetworkManager(ctx context.Context, sm subnet.Manager) (*Manager, error) {
	iface, iaddr, err := lookupExtIface(opts.iface)
	if err != nil {
		return nil, err
	}

	if iface.MTU == 0 {
		return nil, fmt.Errorf("Failed to determine MTU for %s interface", iaddr)
	}

	var eaddr net.IP

	if len(opts.publicIP) > 0 {
		eaddr = net.ParseIP(opts.publicIP)
		if eaddr == nil {
			return nil, fmt.Errorf("Invalid public IP address", opts.publicIP)
		}
	}

	if eaddr == nil {
		eaddr = iaddr
	}

	log.Infof("Using %s as external interface", iaddr)
	log.Infof("Using %s as external endpoint", eaddr)

	manager := &Manager{
		ctx:             ctx,
		sm:              sm,
		allowedNetworks: make(map[string]bool),
		networks:        make(map[string]*Network),
		watch:           opts.watchNetworks,
		ipMasq:          opts.ipMasq,
		extIface:        iface,
		iaddr:           iaddr,
		eaddr:           eaddr,
	}

	for _, name := range strings.Split(opts.networks, ",") {
		manager.allowedNetworks[name] = true
	}

	if manager.isMultiNetwork() {
		// Get list of existing networks
		result, err := manager.sm.WatchNetworks(ctx, nil)
		if err != nil {
			return nil, err
		}

		for _, n := range result.Snapshot {
			if manager.isNetAllowed(n) {
				manager.networks[n] = NewNetwork(ctx, sm, n, manager.ipMasq)
			}
		}
	} else {
		manager.networks[""] = NewNetwork(ctx, sm, "", manager.ipMasq)
	}

	return manager, nil
}

func run(be backend.Backend, exit chan int) {
	var err error
	defer func() {
		if err == nil || err == task.ErrCanceled {
			exit <- 0
		} else {
			log.Error(err)
			exit <- 1
		}
	}()

	iface, ipaddr, err := lookupIface()
	if err != nil {
		return
	}

	if iface.MTU == 0 {
		err = fmt.Errorf("Failed to determine MTU for %s interface", ipaddr)
		return
	}

	log.Infof("Using %s as external interface", ipaddr)

	sn, err := be.Init(iface, ipaddr, opts.ipMasq)
	if err != nil {
		log.Error("Could not init %v backend: %v", be.Name(), err)
		return
	}

	writeSubnetFile(sn)
	daemon.SdNotify("READY=1")

	log.Infof("%s mode initialized", be.Name())
	be.Run()
}

func initAndRun(ctx context.Context, sm subnet.Manager, netnames []string) {
	iface, iaddr, err := lookupIface()
	if err != nil {
		log.Error(err)
		return
	}

	if iface.MTU == 0 {
		log.Errorf("Failed to determine MTU for %s interface", iaddr)
		return
	}

	var eaddr net.IP

	if len(opts.publicIP) > 0 {
		eaddr = net.ParseIP(opts.publicIP)
	}

	if eaddr == nil {
		eaddr = iaddr
	}

	log.Infof("Using %s as external interface", iaddr)
	log.Infof("Using %s as external endpoint", eaddr)

	nets := []*network.Network{}
	for _, n := range netnames {
		nets = append(nets, network.New(sm, n, opts.ipMasq))
	}

	wg := sync.WaitGroup{}

	for _, n := range nets {
		go func(n *network.Network) {
			wg.Add(1)
			defer wg.Done()

			sn := n.Init(ctx, iface, iaddr, eaddr)
			if sn != nil {
				if isMultiNetwork() {
					path := filepath.Join(opts.subnetDir, n.Name) + ".env"
					if err := writeSubnetFile(path, n.Config.Network, sn); err != nil {
						return
					}
				} else {
					if err := writeSubnetFile(opts.subnetFile, n.Config.Network, sn); err != nil {
						return
					}
					daemon.SdNotify("READY=1")
				}

				n.Run(ctx)
				log.Infof("%v exited", n.Name)
			}
		}(n)
	}

	wg.Wait()
}

func (vb *VXLANBackend) handleInitialSubnetEvents(batch []subnet.Event) error {
	log.Infof("Handling initial subnet events")
	fdbTable, err := vb.dev.GetL2List()
	if err != nil {
		return fmt.Errorf("Error fetching L2 table: %v", err)
	}

	for _, fdbEntry := range fdbTable {
		log.Infof("fdb already populated with: %s %s ", fdbEntry.IP, fdbEntry.HardwareAddr)
	}

	evtMarker := make([]bool, len(batch))
	leaseAttrsList := make([]vxlanLeaseAttrs, len(batch))
	fdbEntryMarker := make([]bool, len(fdbTable))

	for i, evt := range batch {
		if evt.Lease.Attrs.BackendType != "vxlan" {
			log.Warningf("Ignoring non-vxlan subnet: type=%v", evt.Lease.Attrs.BackendType)
			evtMarker[i] = true
			continue
		}

		if err := json.Unmarshal(evt.Lease.Attrs.BackendData, &leaseAttrsList[i]); err != nil {
			log.Error("Error decoding subnet lease JSON: ", err)
			evtMarker[i] = true
			continue
		}

		for j, fdbEntry := range fdbTable {
			if evt.Lease.Attrs.PublicIP.ToIP().Equal(fdbEntry.IP) && bytes.Equal([]byte(leaseAttrsList[i].VtepMAC), []byte(fdbEntry.HardwareAddr)) {
				evtMarker[i] = true
				fdbEntryMarker[j] = true
				break
			}
		}
		vb.rts.set(evt.Lease.Subnet, net.HardwareAddr(leaseAttrsList[i].VtepMAC))
	}

	for j, marker := range fdbEntryMarker {
		if !marker && fdbTable[j].IP != nil {
			err := vb.dev.DelL2(neigh{IP: ip.FromIP(fdbTable[j].IP), MAC: fdbTable[j].HardwareAddr})
			if err != nil {
				log.Error("Delete L2 failed: ", err)
			}
		}
	}

	for i, marker := range evtMarker {
		if !marker {
			err := vb.dev.AddL2(neigh{IP: batch[i].Lease.Attrs.PublicIP, MAC: net.HardwareAddr(leaseAttrsList[i].VtepMAC)})
			if err != nil {
				log.Error("Add L2 failed: ", err)
			}

		}
	}
	return nil
}

func lookupExtIface(ifname string) (*backend.ExternalInterface, error) {
	var iface *net.Interface
	var iaddr net.IP
	var err error

	if len(ifname) > 0 {
		if iaddr = net.ParseIP(ifname); iaddr != nil {
			iface, err = ip.GetInterfaceByIP(iaddr)
			if err != nil {
				return nil, fmt.Errorf("error looking up interface %s: %s", ifname, err)
			}
		} else {
			iface, err = net.InterfaceByName(ifname)
			if err != nil {
				return nil, fmt.Errorf("error looking up interface %s: %s", ifname, err)
			}
		}
	} else {
		log.Info("Determining IP address of default interface")
		if iface, err = ip.GetDefaultGatewayIface(); err != nil {
			return nil, fmt.Errorf("failed to get default interface: %s", err)
		}
	}

	if iaddr == nil {
		iaddr, err = ip.GetIfaceIP4Addr(iface)
		if err != nil {
			return nil, fmt.Errorf("failed to find IPv4 address for interface %s", iface.Name)
		}
	}

	if iface.MTU == 0 {
		return nil, fmt.Errorf("failed to determine MTU for %s interface", iaddr)
	}

	var eaddr net.IP

	if len(opts.publicIP) > 0 {
		eaddr = net.ParseIP(opts.publicIP)
		if eaddr == nil {
			return nil, fmt.Errorf("invalid public IP address", opts.publicIP)
		}
	}

	if eaddr == nil {
		eaddr = iaddr
	}

	log.Infof("Using %s as external interface", iaddr)
	log.Infof("Using %s as external endpoint", eaddr)

	return &backend.ExternalInterface{
		Iface:     iface,
		IfaceAddr: iaddr,
		ExtAddr:   eaddr,
	}, nil
}

func (m *Manager) watchNetworks() {
	wg := sync.WaitGroup{}
	defer wg.Wait()

	events := make(chan []subnet.Event)
	wg.Add(1)
	go func() {
		subnet.WatchNetworks(m.ctx, m.sm, events)
		wg.Done()
	}()
	// skip over the initial snapshot
	<-events

	for {
		select {
		case <-m.ctx.Done():
			return

		case evtBatch := <-events:
			for _, e := range evtBatch {
				netname := e.Network
				if !m.isNetAllowed(netname) {
					log.Infof("Network %q is not allowed", netname)
					continue
				}

				switch e.Type {
				case subnet.EventAdded:
					n := NewNetwork(m.ctx, m.sm, m.bm, netname, m.ipMasq)
					if err := m.addNetwork(n); err != nil {
						log.Infof("Network %q: %v", netname, err)
						continue
					}

					log.Infof("Network added: %v", netname)

					wg.Add(1)
					go func() {
						m.runNetwork(n)
						wg.Done()
					}()

				case subnet.EventRemoved:
					log.Infof("Network removed: %v", netname)

					n, ok := m.getNetwork(netname)
					if !ok {
						log.Warningf("Network %v unknown; ignoring EventRemoved", netname)
						continue
					}
					n.Cancel()
				}
			}
		}
	}
}

func (m *EtcdManager) tryAcquireLease(ctx context.Context, network string, config *Config, extIP ip.IP4, attrs *LeaseAttrs) (*Lease, error) {
	var err error
	leases, _, err := m.getLeases(ctx, network)
	if err != nil {
		return nil, err
	}

	attrBytes, err := json.Marshal(attrs)
	if err != nil {
		return nil, err
	}

	// try to reuse a subnet if there's one that matches our IP
	if l := findLeaseByIP(leases, extIP); l != nil {
		// make sure the existing subnet is still within the configured network
		if isSubnetConfigCompat(config, l.Subnet) {
			log.Infof("Found lease (%v) for current IP (%v), reusing", l.Subnet, extIP)
			resp, err := m.registry.updateSubnet(ctx, network, l.Key(), string(attrBytes), subnetTTL)
			if err != nil {
				return nil, err
			}

			l.Attrs = attrs
			l.Expiration = *resp.Node.Expiration
			return l, nil
		} else {
			log.Infof("Found lease (%v) for current IP (%v) but not compatible with current config, deleting", l.Subnet, extIP)
			if _, err := m.registry.deleteSubnet(ctx, network, l.Key()); err != nil {
				return nil, err
			}
		}
	}

	// no existing match, grab a new one
	sn, err := m.allocateSubnet(config, leases)
	if err != nil {
		return nil, err
	}

	resp, err := m.registry.createSubnet(ctx, network, sn.StringSep(".", "-"), string(attrBytes), subnetTTL)
	switch {
	case err == nil:
		return &Lease{
			Subnet:     sn,
			Attrs:      attrs,
			Expiration: *resp.Node.Expiration,
		}, nil

	// if etcd returned Key Already Exists, try again.
	case err.(*etcd.EtcdError).ErrorCode == etcdKeyAlreadyExists:
		return nil, nil

	default:
		return nil, err
	}
}

func (m *LocalManager) tryAcquireLease(ctx context.Context, network string, config *Config, extIaddr ip.IP4, attrs *LeaseAttrs) (*Lease, error) {
	leases, _, err := m.registry.getSubnets(ctx, network)
	if err != nil {
		return nil, err
	}

	// try to reuse a subnet if there's one that matches our IP
	if l := findLeaseByIP(leases, extIaddr); l != nil {
		// make sure the existing subnet is still within the configured network
		if isSubnetConfigCompat(config, l.Subnet) {
			log.Infof("Found lease (%v) for current IP (%v), reusing", l.Subnet, extIaddr)

			ttl := time.Duration(0)
			if !l.Expiration.IsZero() {
				// Not a reservation
				ttl = subnetTTL
			}
			exp, err := m.registry.updateSubnet(ctx, network, l.Subnet, attrs, ttl, 0)
			if err != nil {
				return nil, err
			}

			l.Attrs = *attrs
			l.Expiration = exp
			return l, nil
		} else {
			log.Infof("Found lease (%v) for current IP (%v) but not compatible with current config, deleting", l.Subnet, extIaddr)
			if err := m.registry.deleteSubnet(ctx, network, l.Subnet); err != nil {
				return nil, err
			}
		}
	}

	// no existing match, grab a new one
	sn, err := m.allocateSubnet(config, leases)
	if err != nil {
		return nil, err
	}

	exp, err := m.registry.createSubnet(ctx, network, sn, attrs, subnetTTL)
	switch {
	case err == nil:
		return &Lease{
			Subnet:     sn,
			Attrs:      *attrs,
			Expiration: exp,
		}, nil
	case isErrEtcdNodeExist(err):
		return nil, errTryAgain
	default:
		return nil, err
	}
}

func (m *LocalManager) tryAcquireLease(ctx context.Context, network string, config *Config, extIaddr ip.IP4, attrs *LeaseAttrs) (*Lease, error) {
	var err error
	leases, _, err := m.registry.getSubnets(ctx, network)
	if err != nil {
		return nil, err
	}

	// try to reuse a subnet if there's one that matches our IP
	if l := findLeaseByIP(leases, extIaddr); l != nil {
		// make sure the existing subnet is still within the configured network
		if isSubnetConfigCompat(config, l.Subnet) {
			log.Infof("Found lease (%v) for current IP (%v), reusing", l.Subnet, extIaddr)
			exp, err := m.registry.updateSubnet(ctx, network, l.Subnet, attrs, subnetTTL, 0)
			if err != nil {
				return nil, err
			}

			l.Attrs = *attrs
			l.Expiration = exp
			return l, nil
		} else {
			log.Infof("Found lease (%v) for current IP (%v) but not compatible with current config, deleting", l.Subnet, extIaddr)
			if err := m.registry.deleteSubnet(ctx, network, l.Subnet); err != nil {
				return nil, err
			}
		}
	}

	// no existing match, grab a new one
	sn, err := m.allocateSubnet(config, leases)
	if err != nil {
		return nil, err
	}

	exp, err := m.registry.createSubnet(ctx, network, sn, attrs, subnetTTL)
	if err == nil {
		return &Lease{
			Subnet:     sn,
			Attrs:      *attrs,
			Expiration: exp,
		}, nil
	}

	if etcdErr, ok := err.(etcd.Error); ok && etcdErr.Code == etcd.ErrorCodeNodeExist {
		// if etcd returned Key Already Exists, try again.
		return nil, nil
	}

	return nil, err
}

func (vb *VXLANBackend) handleL3Miss(miss *netlink.Neigh) {
	log.Infof("L3 miss: %v", miss.IP)

	rt := vb.rts.findByNetwork(ip.FromIP(miss.IP))
	if rt == nil {
		log.Infof("Route for %v not found", miss.IP)
		return
	}

	if err := vb.dev.AddL3(neigh{IP: ip.FromIP(miss.IP), MAC: rt.vtepMAC}); err != nil {
		log.Errorf("AddL3 failed: %v", err)
	} else {
		log.Info("AddL3 succeeded")
	}
}

func (rb *HostgwBackend) checkSubnetExistInRoutes() {
	routeList, err := netlink.RouteList(nil, netlink.FAMILY_V4)
	if err == nil {
		for _, route := range rb.rl {
			exist := false
			for _, r := range routeList {
				if r.Dst == nil {
					continue
				}
				if routeEqual(r, route) {
					exist = true
					break
				}
			}
			if !exist {
				if err := netlink.RouteAdd(&route); err != nil {
					if nerr, ok := err.(net.Error); !ok {
						log.Errorf("Error recovering route to %v: %v, %v", route.Dst, route.Gw, nerr)
					}
					continue
				} else {
					log.Infof("Route recovered %v : %v", route.Dst, route.Gw)
				}
			}
		}
	}
}

func (dev *vxlanDevice) DelL2(n neigh) error {
	log.Infof("calling NeighDel: %v, %v", n.IP, n.MAC)
	return netlink.NeighDel(&netlink.Neigh{
		LinkIndex:    dev.link.Index,
		Family:       syscall.AF_BRIDGE,
		Flags:        netlink.NTF_SELF,
		IP:           n.IP.ToIP(),
		HardwareAddr: n.MAC,
	})
}

func (dev *vxlanDevice) DelL3(n neigh) error {
	log.Infof("calling NeighDel: %v, %v", n.IP, n.MAC)
	return netlink.NeighDel(&netlink.Neigh{
		LinkIndex:    dev.link.Index,
		State:        netlink.NUD_REACHABLE,
		Type:         syscall.RTN_UNICAST,
		IP:           n.IP.ToIP(),
		HardwareAddr: n.MAC,
	})
}

func (vb *VXLANBackend) handleMiss(miss *netlink.Neigh) {
	switch {
	case len(miss.IP) == 0 && len(miss.HardwareAddr) == 0:
		log.Info("Ignoring nil miss")

	case len(miss.HardwareAddr) == 0:
		vb.handleL3Miss(miss)

	default:
		log.Infof("Ignoring not a miss: %v, %v", miss.HardwareAddr, miss.IP)
	}
}

func (g *GCEBackend) insertRoute(subnet string) (*compute.Operation, error) {
	log.Infof("Inserting route for subnet: %v", subnet)
	route := &compute.Route{
		Name:            formatRouteName(subnet),
		DestRange:       subnet,
		Network:         g.gceNetwork.SelfLink,
		NextHopInstance: g.gceInstance.SelfLink,
		Priority:        1000,
		Tags:            []string{},
	}
	return g.computeService.Routes.Insert(g.project, route).Do()
}