func listenAndServe(dockerClient *docker.Client, address, nameserver string, noMulticastRoute bool, endChan chan<- error, scope string, withIpam bool) (net.Listener, error) {
d, err := netplugin.New(dockerClient, version, nameserver, scope, noMulticastRoute)
if err != nil {
return nil, err
}
var i ipamapi.Ipam
if withIpam {
if i, err = ipamplugin.NewIpam(dockerClient, version); err != nil {
return nil, err
}
}
var listener net.Listener
// remove sockets from last invocation
if err := os.Remove(address); err != nil && !os.IsNotExist(err) {
return nil, err
}
listener, err = net.Listen("unix", address)
if err != nil {
return nil, err
}
Log.Printf("Listening on %s for %s scope", address, scope)
go func() {
endChan <- skel.Listen(listener, d, i)
}()
return listener, nil
}
func (c *CNIPlugin) CmdDel(args *skel.CmdArgs) error {
conf, err := loadNetConf(args.StdinData)
if err != nil {
return err
}
ns, err := netns.GetFromPath(args.Netns)
if err != nil {
return err
}
defer ns.Close()
err = weavenet.WithNetNSUnsafe(ns, func() error {
link, err := netlink.LinkByName(args.IfName)
if err != nil {
return err
}
return netlink.LinkDel(link)
})
if err != nil {
return fmt.Errorf("error removing interface: %s", err)
}
// Default IPAM is Weave's own
if conf.IPAM.Type == "" {
err = ipamplugin.NewIpam(c.weave).Release(args)
} else {
err = ipam.ExecDel(conf.IPAM.Type, args.StdinData)
}
if err != nil {
return fmt.Errorf("unable to release IP address: %s", err)
}
return nil
}
func main() {
var (
justVersion bool
cniNet bool
cniIpam bool
address string
meshAddress string
logLevel string
noMulticastRoute bool
)
flag.BoolVar(&justVersion, "version", false, "print version and exit")
flag.BoolVar(&cniNet, "cni-net", false, "act as a CNI network plugin")
flag.BoolVar(&cniIpam, "cni-ipam", false, "act as a CNI IPAM plugin")
flag.StringVar(&logLevel, "log-level", "info", "logging level (debug, info, warning, error)")
flag.StringVar(&address, "socket", "/run/docker/plugins/weave.sock", "socket on which to listen")
flag.StringVar(&meshAddress, "meshsocket", "/run/docker/plugins/weavemesh.sock", "socket on which to listen in mesh mode")
flag.BoolVar(&noMulticastRoute, "no-multicast-route", false, "deprecated (this is now the default)")
flag.Parse()
if justVersion {
fmt.Printf("weave plugin %s\n", version)
os.Exit(0)
}
common.SetLogLevel(logLevel)
weave := weaveapi.NewClient(os.Getenv("WEAVE_HTTP_ADDR"), Log)
switch {
case cniIpam || strings.HasSuffix(os.Args[0], "weave-ipam"):
i := ipamplugin.NewIpam(weave)
cni.PluginMain(i.CmdAdd, i.CmdDel)
os.Exit(0)
case cniNet || strings.HasSuffix(os.Args[0], "weave-net"):
n := netplugin.NewCNIPlugin(weave)
cni.PluginMain(n.CmdAdd, n.CmdDel)
os.Exit(0)
}
// API 1.21 is the first version that supports docker network commands
dockerClient, err := docker.NewVersionedClientFromEnv("1.21")
if err != nil {
Log.Fatalf("unable to connect to docker: %s", err)
}
Log.Println("Weave plugin", version, "Command line options:", os.Args[1:])
if noMulticastRoute {
Log.Warning("--no-multicast-route option has been removed; multicast is off by default")
}
Log.Info(dockerClient.Info())
err = run(dockerClient, weave, address, meshAddress)
if err != nil {
Log.Fatal(err)
}
}
func (c *CNIPlugin) getIP(ipamType string, args *skel.CmdArgs) (result *types.Result, err error) {
// Default IPAM is Weave's own
if ipamType == "" {
result, err = ipamplugin.NewIpam(c.weave).Allocate(args)
} else {
result, err = ipam.ExecAdd(ipamType, args.StdinData)
}
if err == nil && result.IP4 == nil {
return nil, fmt.Errorf("IPAM plugin failed to allocate IP address")
}
return result, err
}
func listenAndServe(dockerClient *docker.Client, weave *weaveapi.Client, address string, noMulticastRoute bool, endChan chan<- error, scope string, withIpam bool) (net.Listener, error) {
d, err := netplugin.New(dockerClient, weave, scope, noMulticastRoute)
if err != nil {
return nil, err
}
var i ipamapi.Ipam
if withIpam {
i = ipamplugin.NewIpam(weave)
}
listener, err := weavenet.ListenUnixSocket(address)
if err != nil {
return nil, err
}
Log.Printf("Listening on %s for %s scope", address, scope)
go func() {
endChan <- skel.Listen(listener, d, i)
}()
return listener, nil
}
func listenAndServe(dockerClient *docker.Client, weave *weaveapi.Client, address string, endChan chan<- error, scope string, withIpam bool) (net.Listener, error) {
name := strings.TrimSuffix(path.Base(address), ".sock")
d, err := netplugin.New(dockerClient, weave, name, scope)
if err != nil {
return nil, err
}
var i ipamapi.Ipam
if withIpam {
i = ipamplugin.NewIpam(weave)
}
listener, err := weavenet.ListenUnixSocket(address)
if err != nil {
return nil, err
}
Log.Printf("Listening on %s for %s scope", address, scope)
go func() {
endChan <- skel.Listen(listener, d, i)
}()
return listener, nil
}