func run(be backend.Backend, sm *subnet.SubnetManager, 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.httpPort, opts.ipMasq)
if err != nil {
return
}
writeSubnetFile(sn)
notifyWebhook(sn)
daemon.SdNotify("READY=1")
if err = httpServer(sm, ipaddr.String(), opts.httpPort); err != nil {
err = fmt.Errorf("error starting HTTP server: %s", err)
return
}
if opts.discoverdURL != "" {
disc.NewClientWithURL(opts.discoverdURL).AddServiceAndRegister("flannel", net.JoinHostPort(ipaddr.String(), opts.httpPort))
}
log.Infof("%s mode initialized", be.Name())
be.Run()
}
func makeSubnetManager() *subnet.SubnetManager {
var registryFn func() (subnet.Registry, error)
if opts.discoverdURL != "" {
client := disc.NewClientWithURL(opts.discoverdURL)
registryFn = func() (subnet.Registry, error) {
return discoverd.NewRegistry(client, "flannel")
}
} else {
cfg := &subnet.EtcdConfig{
Endpoints: strings.Split(opts.etcdEndpoints, ","),
Keyfile: opts.etcdKeyfile,
Certfile: opts.etcdCertfile,
CAFile: opts.etcdCAFile,
Prefix: opts.etcdPrefix,
}
registryFn = func() (subnet.Registry, error) {
return subnet.NewEtcdSubnetRegistry(cfg)
}
}
for {
reg, err := registryFn()
if err != nil {
log.Error("Failed to create subnet registry: ", err)
time.Sleep(time.Second)
continue
}
sm, err := subnet.NewSubnetManager(reg)
if err == nil {
return sm
}
log.Error("Failed to create SubnetManager: ", err)
time.Sleep(time.Second)
}
}