func (cli *DockerCli) CmdPort(args ...string) error { cmd := cli.Subcmd("port", "CONTAINER [PRIVATE_PORT[/PROTO]]", "List port mappings for the CONTAINER, or lookup the public-facing port that\nis NAT-ed to the PRIVATE_PORT", true) cmd.Require(flag.Min, 1) utils.ParseFlags(cmd, args, true) stream, _, err := cli.call("GET", "/containers/"+cmd.Arg(0)+"/json", nil, false) if err != nil { return err } env := engine.Env{} if err := env.Decode(stream); err != nil { return err } ports := nat.PortMap{} if err := env.GetSubEnv("NetworkSettings").GetJson("Ports", &ports); err != nil { return err } if cmd.NArg() == 2 { var ( port = cmd.Arg(1) proto = "tcp" parts = strings.SplitN(port, "/", 2) ) if len(parts) == 2 && len(parts[1]) != 0 { port = parts[0] proto = parts[1] } natPort := port + "/" + proto if frontends, exists := ports[nat.Port(port+"/"+proto)]; exists && frontends != nil { for _, frontend := range frontends { fmt.Fprintf(cli.out, "%s:%s\n", frontend.HostIp, frontend.HostPort) } return nil } return fmt.Errorf("Error: No public port '%s' published for %s", natPort, cmd.Arg(0)) } for from, frontends := range ports { for _, frontend := range frontends { fmt.Fprintf(cli.out, "%s -> %s:%s\n", from, frontend.HostIp, frontend.HostPort) } } return nil }
func LinkContainers(job *engine.Job) engine.Status { var ( action = job.Args[0] nfAction iptables.Action childIP = job.Getenv("ChildIP") parentIP = job.Getenv("ParentIP") ignoreErrors = job.GetenvBool("IgnoreErrors") ports = job.GetenvList("Ports") ) switch action { case "-A": nfAction = iptables.Append case "-I": nfAction = iptables.Insert case "-D": nfAction = iptables.Delete default: return job.Errorf("Invalid action '%s' specified", action) } ip1 := net.ParseIP(parentIP) if ip1 == nil { return job.Errorf("parent IP '%s' is invalid", parentIP) } ip2 := net.ParseIP(childIP) if ip2 == nil { return job.Errorf("child IP '%s' is invalid", childIP) } chain := iptables.Chain{Name: "DOCKER", Bridge: bridgeIface} for _, p := range ports { port := nat.Port(p) if err := chain.Link(nfAction, ip1, ip2, port.Int(), port.Proto()); !ignoreErrors && err != nil { return job.Error(err) } } return engine.StatusOK }