Example #1
0
func main() {
	flag.Parse()

	if *target == 0 && *path == "" {
		fmt.Fprintln(os.Stderr, "error: a target pid or path is required")
		flag.PrintDefaults()
		return
	}

	if *target != 0 {
		p, err := namespace.ProcessPath(*target, namespace.CLONE_NEWNET)
		if err != nil {
			panic(err)
		}
		*path = p
	}

	fmt.Printf("PROXY: targetPath:%v targetAddr:%v remoteAddr:%v\n",
		*path, *targetAddr, *remoteAddr)

	listener, err := nameNet.ListenNamespace(*path, "tcp", *targetAddr)
	if err != nil {
		panic(err)
	}

	for {
		// Wait for a connection.
		conn, err := listener.Accept()
		if err != nil {
			log.Fatal(err)
		}
		go proxyConn(&conn)
	}
}
Example #2
0
func proxy(c *cli.Context) {
	addr := c.String("addr")
	namespacePid := c.Int("namespace-pid")
	namespacePath := c.String("namespace-path")

	if namespacePid == 0 && namespacePath == "" {
		fmt.Fprintln(os.Stderr, "warn: a namespace pid or path is required to setns, listening in this namespace")
	}

	path := c.String("path")
	if path == "" {
		fmt.Fprintln(os.Stderr, "error: an etcd path is required")
		return
	}

	if namespacePid != 0 {
		p, err := namespace.ProcessPath(namespacePid, namespace.CLONE_NEWNET)
		if err != nil {
			panic(err)
		}
		namespacePath = p
	}

	peers := trimsplit(c.String("peers"), ",")
	client := etcd.NewClient(peers)

	log.Printf("Proxying for keys in %s on host %s", path, addr)

	// Keep an eye on the backend path
	b := backends{path: path}
	err := b.Sync(client)
	if err != nil {
		log.Fatal(err)
	}

	go b.Watch(client)

	log.Printf("Proxying for keys in %s on host %s in namespace %d", path, addr, namespacePath)
	listener, err := nameNet.ListenNamespace(namespacePath, "tcp", addr)

	if err != nil {
		panic(err)
	}

	for {
		// Wait for a connection.
		conn, err := listener.Accept()
		if err != nil {
			log.Fatal(err)
		}

		next := b.Next()
		if next == "" {
			conn.Close()
			log.Printf("No backends! Closing the connection")
			continue
		}

		log.Printf("PROXY: targetAddr:%v addr:%v\n", addr, next)
		go proxyConn(&conn, next)
	}
}