Golang glog.Warningf函数代码示例

func (rb *HostgwBackend) handleSubnetEvents(batch []subnet.Event) {
	for _, evt := range batch {
		switch evt.Type {
		case subnet.SubnetAdded:
			log.Infof("Subnet added: %v via %v", evt.Lease.Subnet, evt.Lease.Attrs.PublicIP)

			if evt.Lease.Attrs.BackendType != "host-gw" {
				log.Warningf("Ignoring non-host-gw subnet: type=%v", evt.Lease.Attrs.BackendType)
				continue
			}

			route := netlink.Route{
				Dst:       evt.Lease.Subnet.ToIPNet(),
				Gw:        evt.Lease.Attrs.PublicIP.ToIP(),
				LinkIndex: rb.extIface.Index,
			}
			if rb.extIaddr.Equal(route.Gw) {
				continue
			}
			if err := netlink.RouteAdd(&route); err != nil {
				log.Errorf("Error adding route to %v via %v: %v", evt.Lease.Subnet, evt.Lease.Attrs.PublicIP, err)
				continue
			}
			rb.addToRouteList(route)

		case subnet.SubnetRemoved:
			log.Info("Subnet removed: ", evt.Lease.Subnet)

			if evt.Lease.Attrs.BackendType != "host-gw" {
				log.Warningf("Ignoring non-host-gw subnet: type=%v", evt.Lease.Attrs.BackendType)
				continue
			}

			route := netlink.Route{
				Dst:       evt.Lease.Subnet.ToIPNet(),
				Gw:        evt.Lease.Attrs.PublicIP.ToIP(),
				LinkIndex: rb.extIface.Index,
			}
			if err := netlink.RouteDel(&route); err != nil {
				log.Errorf("Error deleting route to %v: %v", evt.Lease.Subnet, err)
				continue
			}
			rb.removeFromRouteList(route)

		default:
			log.Error("Internal error: unknown event type: ", int(evt.Type))
		}
	}
}

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 (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 (vb *VXLANBackend) handleSubnetEvents(batch []subnet.Event) {
	for _, evt := range batch {
		switch evt.Type {
		case subnet.EventAdded:
			log.Info("Subnet added: ", evt.Lease.Subnet)

			if evt.Lease.Attrs.BackendType != "vxlan" {
				log.Warningf("Ignoring non-vxlan subnet: type=%v", evt.Lease.Attrs.BackendType)
				continue
			}

			var attrs vxlanLeaseAttrs
			if err := json.Unmarshal(evt.Lease.Attrs.BackendData, &attrs); err != nil {
				log.Error("Error decoding subnet lease JSON: ", err)
				continue
			}
			vb.rts.set(evt.Lease.Subnet, net.HardwareAddr(attrs.VtepMAC))
			vb.dev.AddL2(neigh{IP: evt.Lease.Attrs.PublicIP, MAC: net.HardwareAddr(attrs.VtepMAC)})

		case subnet.EventRemoved:
			log.Info("Subnet removed: ", evt.Lease.Subnet)

			if evt.Lease.Attrs.BackendType != "vxlan" {
				log.Warningf("Ignoring non-vxlan subnet: type=%v", evt.Lease.Attrs.BackendType)
				continue
			}

			var attrs vxlanLeaseAttrs
			if err := json.Unmarshal(evt.Lease.Attrs.BackendData, &attrs); err != nil {
				log.Error("Error decoding subnet lease JSON: ", err)
				continue
			}

			if len(attrs.VtepMAC) > 0 {
				vb.dev.DelL2(neigh{IP: evt.Lease.Attrs.PublicIP, MAC: net.HardwareAddr(attrs.VtepMAC)})
			}
			vb.rts.remove(evt.Lease.Subnet)

		default:
			log.Error("Internal error: unknown event type: ", int(evt.Type))
		}
	}
}

func (m *Manager) runNetwork(n *Network) {
	n.Run(m.extIface, func(bn backend.Network) {
		if m.isMultiNetwork() {
			path := filepath.Join(opts.subnetDir, n.Name) + ".env"
			if err := writeSubnetFile(path, n.Config.Network, m.ipMasq, bn); err != nil {
				log.Warningf("%v failed to write subnet file: %s", n.Name, err)
				return
			}
		} else {
			if err := writeSubnetFile(opts.subnetFile, n.Config.Network, m.ipMasq, bn); err != nil {
				log.Warningf("%v failed to write subnet file: %s", n.Name, err)
				return
			}
			daemon.SdNotify("READY=1")
		}
	})

	m.delNetwork(n)
}

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

	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():
			break

		case evtBatch := <-events:
			for _, e := range evtBatch {
				netname := e.Network
				if !m.isNetAllowed(netname) {
					continue
				}

				switch e.Type {
				case subnet.EventAdded:
					if _, ok := m.networks[netname]; ok {
						continue
					}
					net := NewNetwork(m.ctx, m.sm, netname, m.ipMasq)
					m.networks[netname] = net
					wg.Add(1)
					go func() {
						m.RunNetwork(net)
						wg.Done()
					}()

				case subnet.EventRemoved:
					net, ok := m.networks[netname]
					if !ok {
						log.Warningf("Network %v unknown; ignoring EventRemoved", netname)
						continue
					}
					net.Cancel()
					delete(m.networks, netname)
				}
			}
		}
	}

	wg.Wait()
}

func (m *Manager) RunNetwork(net *Network) {
	sn := net.Init(m.extIface, m.iaddr, m.eaddr)
	if sn != nil {
		if m.isMultiNetwork() {
			path := filepath.Join(opts.subnetDir, net.Name) + ".env"
			if err := writeSubnetFile(path, net.Config.Network, m.ipMasq, sn); err != nil {
				log.Warningf("%v failed to write subnet file: %s", net.Name, err)
				return
			}
		} else {
			if err := writeSubnetFile(opts.subnetFile, net.Config.Network, m.ipMasq, sn); err != nil {
				log.Warningf("%v failed to write subnet file: %s", net.Name, err)
				return
			}
			daemon.SdNotify("READY=1")
		}

		log.Infof("Running network %v", net.Name)
		net.Run()
		log.Infof("%v exited", net.Name)
	}
}

func ensureLink(vxlan *netlink.Vxlan) (*netlink.Vxlan, error) {
	err := netlink.LinkAdd(vxlan)
	if err == syscall.EEXIST {
		// it's ok if the device already exists as long as config is similar
		existing, err := netlink.LinkByName(vxlan.Name)
		if err != nil {
			return nil, err
		}

		incompat := vxlanLinksIncompat(vxlan, existing)
		if incompat == "" {
			return existing.(*netlink.Vxlan), nil
		}

		// delete existing
		log.Warningf("%q already exists with incompatable configuration: %v; recreating device", vxlan.Name, incompat)
		if err = netlink.LinkDel(existing); err != nil {
			return nil, fmt.Errorf("failed to delete interface: %v", err)
		}

		// create new
		if err = netlink.LinkAdd(vxlan); err != nil {
			return nil, fmt.Errorf("failed to create vxlan interface: %v", err)
		}
	} else if err != nil {
		return nil, err
	}

	ifindex := vxlan.Index
	link, err := netlink.LinkByIndex(vxlan.Index)
	if err != nil {
		return nil, fmt.Errorf("can't locate created vxlan device with index %v", ifindex)
	}
	var ok bool
	if vxlan, ok = link.(*netlink.Vxlan); !ok {
		return nil, fmt.Errorf("created vxlan device with index %v is not vxlan", ifindex)
	}

	return vxlan, nil
}

func (ipt *IPTables) Exists(table string, args ...string) (bool, error) {
	checkPresent, err := getIptablesHasCheckCommand()
	if err != nil {
		log.Warningf("Error checking iptables version, assuming version at least 1.4.11: %v\n", err)
		checkPresent = true
	}

	if !checkPresent {
		cmd := append([]string{"-A"}, args...)
		return existsForOldIpTables(table, strings.Join(cmd, " "))
	} else {
		cmd := append([]string{"-t", table, "-C"}, args...)
		err = exec.Command(ipt.path, cmd...).Run()
	}
	switch {
	case err == nil:
		return true, nil
	case err.(*exec.ExitError).Sys().(syscall.WaitStatus).ExitStatus() == 1:
		return false, nil
	default:
		return false, err
	}
}

// getSubnets queries etcd to get a list of currently allocated leases for a given network.
// It returns the leases along with the "as-of" etcd-index that can be used as the starting
// point for etcd watch.
func (esr *etcdSubnetRegistry) getSubnets(ctx context.Context, network string) ([]Lease, uint64, error) {
	key := path.Join(esr.etcdCfg.Prefix, network, "subnets")
	resp, err := esr.client().Get(ctx, key, &etcd.GetOptions{Recursive: true})
	if err != nil {
		if etcdErr, ok := err.(etcd.Error); ok && etcdErr.Code == etcd.ErrorCodeKeyNotFound {
			// key not found: treat it as empty set
			return []Lease{}, etcdErr.Index, nil
		}
		return nil, 0, err
	}

	leases := []Lease{}
	for _, node := range resp.Node.Nodes {
		l, err := nodeToLease(node)
		if err != nil {
			log.Warningf("Ignoring bad subnet node: %v", err)
			continue
		}

		leases = append(leases, *l)
	}

	return leases, resp.Index, nil
}