Example #1
0
func (n *Network) Init(ctx context.Context, iface *net.Interface, ipaddr net.IP) *backend.SubnetDef {
	var cfg *subnet.Config
	var be backend.Backend
	var sn *backend.SubnetDef

	steps := []func() error{
		func() (err error) {
			cfg, err = n.sm.GetNetworkConfig(ctx, n.Name)
			if err != nil {
				log.Error("Failed to retrieve network config: ", err)
			}
			return
		},

		func() (err error) {
			be, err = newBackend(n.sm, n.Name, cfg)
			if err != nil {
				log.Error("Failed to create backend: ", err)
			} else {
				n.be = be
			}
			return
		},

		func() (err error) {
			sn, err = be.Init(iface, ipaddr)
			if err != nil {
				log.Errorf("Failed to initialize network %v (type %v): %v", n.Name, be.Name(), err)
			}
			return
		},

		func() (err error) {
			if n.ipMasq {
				flannelNet := cfg.Network
				if err = setupIPMasq(flannelNet); err != nil {
					log.Errorf("Failed to set up IP Masquerade for network %v: %v", n.Name, err)
				}
			}
			return
		},
	}

	for _, s := range steps {
		for ; ; time.Sleep(time.Second) {
			select {
			case <-ctx.Done():
				return nil
			default:
			}

			err := s()
			if err == nil {
				break
			}
		}
	}

	return sn
}
Example #2
0
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()
}