func (cli *DockerCli) CmdTop(args ...string) error {
cmd := cli.Subcmd("top", "CONTAINER [ps OPTIONS]", "Display the running processes of a container", true)
cmd.Require(flag.Min, 1)
utils.ParseFlags(cmd, args, true)
val := url.Values{}
if cmd.NArg() > 1 {
val.Set("ps_args", strings.Join(cmd.Args()[1:], " "))
}
stream, _, err := cli.call("GET", "/containers/"+cmd.Arg(0)+"/top?"+val.Encode(), nil, false)
if err != nil {
return err
}
var procs engine.Env
if err := procs.Decode(stream); err != nil {
return err
}
w := tabwriter.NewWriter(cli.out, 20, 1, 3, ' ', 0)
fmt.Fprintln(w, strings.Join(procs.GetList("Titles"), "\t"))
processes := [][]string{}
if err := procs.GetJson("Processes", &processes); err != nil {
return err
}
for _, proc := range processes {
fmt.Fprintln(w, strings.Join(proc, "\t"))
}
w.Flush()
return nil
}
func (cli *DockerCli) CmdCommit(args ...string) error {
cmd := cli.Subcmd("commit", "CONTAINER [REPOSITORY[:TAG]]", "Create a new image from a container's changes", true)
flPause := cmd.Bool([]string{"p", "-pause"}, true, "Pause container during commit")
flComment := cmd.String([]string{"m", "-message"}, "", "Commit message")
flAuthor := cmd.String([]string{"a", "#author", "-author"}, "", "Author (e.g., \"John Hannibal Smith <*****@*****.**>\")")
flChanges := opts.NewListOpts(nil)
cmd.Var(&flChanges, []string{"c", "-change"}, "Apply Dockerfile instruction to the created image")
// FIXME: --run is deprecated, it will be replaced with inline Dockerfile commands.
flConfig := cmd.String([]string{"#run", "#-run"}, "", "This option is deprecated and will be removed in a future version in favor of inline Dockerfile-compatible commands")
cmd.Require(flag.Max, 2)
cmd.Require(flag.Min, 1)
utils.ParseFlags(cmd, args, true)
var (
name = cmd.Arg(0)
repository, tag = parsers.ParseRepositoryTag(cmd.Arg(1))
)
//Check if the given image name can be resolved
if repository != "" {
if err := registry.ValidateRepositoryName(repository); err != nil {
return err
}
}
v := url.Values{}
v.Set("container", name)
v.Set("repo", repository)
v.Set("tag", tag)
v.Set("comment", *flComment)
v.Set("author", *flAuthor)
for _, change := range flChanges.GetAll() {
v.Add("changes", change)
}
if *flPause != true {
v.Set("pause", "0")
}
var (
config *runconfig.Config
env engine.Env
)
if *flConfig != "" {
config = &runconfig.Config{}
if err := json.Unmarshal([]byte(*flConfig), config); err != nil {
return err
}
}
stream, _, err := cli.call("POST", "/commit?"+v.Encode(), config, false)
if err != nil {
return err
}
if err := env.Decode(stream); err != nil {
return err
}
fmt.Fprintf(cli.out, "%s\n", env.Get("Id"))
return nil
}
func waitForExit(cli *DockerCli, containerId string) (int, error) {
stream, _, err := cli.call("POST", "/containers/"+containerId+"/wait", nil, false)
if err != nil {
return -1, err
}
var out engine.Env
if err := out.Decode(stream); err != nil {
return -1, err
}
return out.GetInt("StatusCode"), nil
}
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
}
// getExecExitCode perform an inspect on the exec command. It returns
// the running state and the exit code.
func getExecExitCode(cli *DockerCli, execId string) (bool, int, error) {
stream, _, err := cli.call("GET", "/exec/"+execId+"/json", nil, false)
if err != nil {
// If we can't connect, then the daemon probably died.
if err != ErrConnectionRefused {
return false, -1, err
}
return false, -1, nil
}
var result engine.Env
if err := result.Decode(stream); err != nil {
return false, -1, err
}
return result.GetBool("Running"), result.GetInt("ExitCode"), nil
}
func (cli *DockerCli) CmdLogs(args ...string) error {
var (
cmd = cli.Subcmd("logs", "CONTAINER", "Fetch the logs of a container", true)
follow = cmd.Bool([]string{"f", "-follow"}, false, "Follow log output")
times = cmd.Bool([]string{"t", "-timestamps"}, false, "Show timestamps")
tail = cmd.String([]string{"-tail"}, "all", "Number of lines to show from the end of the logs")
)
cmd.Require(flag.Exact, 1)
utils.ParseFlags(cmd, args, true)
name := cmd.Arg(0)
stream, _, err := cli.call("GET", "/containers/"+name+"/json", nil, false)
if err != nil {
return err
}
env := engine.Env{}
if err := env.Decode(stream); err != nil {
return err
}
if env.GetSubEnv("HostConfig").GetSubEnv("LogConfig").Get("Type") != "json-file" {
return fmt.Errorf("\"logs\" command is supported only for \"json-file\" logging driver")
}
v := url.Values{}
v.Set("stdout", "1")
v.Set("stderr", "1")
if *times {
v.Set("timestamps", "1")
}
if *follow {
v.Set("follow", "1")
}
v.Set("tail", *tail)
return cli.streamHelper("GET", "/containers/"+name+"/logs?"+v.Encode(), env.GetSubEnv("Config").GetBool("Tty"), nil, cli.out, cli.err, nil)
}
func postCommit(eng *engine.Engine, version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := parseForm(r); err != nil {
return err
}
var (
config engine.Env
env engine.Env
job = eng.Job("commit", r.Form.Get("container"))
stdoutBuffer = bytes.NewBuffer(nil)
)
if err := checkForJson(r); err != nil {
return err
}
if err := config.Decode(r.Body); err != nil {
log.Errorf("%s", err)
}
if r.FormValue("pause") == "" && version.GreaterThanOrEqualTo("1.13") {
job.Setenv("pause", "1")
} else {
job.Setenv("pause", r.FormValue("pause"))
}
job.Setenv("repo", r.Form.Get("repo"))
job.Setenv("tag", r.Form.Get("tag"))
job.Setenv("author", r.Form.Get("author"))
job.Setenv("comment", r.Form.Get("comment"))
job.SetenvList("changes", r.Form["changes"])
job.SetenvSubEnv("config", &config)
job.Stdout.Add(stdoutBuffer)
if err := job.Run(); err != nil {
return err
}
env.Set("Id", engine.Tail(stdoutBuffer, 1))
return writeJSONEnv(w, http.StatusCreated, env)
}
func postContainersCopy(eng *engine.Engine, version version.Version, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if vars == nil {
return fmt.Errorf("Missing parameter")
}
var copyData engine.Env
if err := checkForJson(r); err != nil {
return err
}
if err := copyData.Decode(r.Body); err != nil {
return err
}
if copyData.Get("Resource") == "" {
return fmt.Errorf("Path cannot be empty")
}
origResource := copyData.Get("Resource")
if copyData.Get("Resource")[0] == '/' {
copyData.Set("Resource", copyData.Get("Resource")[1:])
}
job := eng.Job("container_copy", vars["name"], copyData.Get("Resource"))
job.Stdout.Add(w)
w.Header().Set("Content-Type", "application/x-tar")
if err := job.Run(); err != nil {
log.Errorf("%v", err)
if strings.Contains(strings.ToLower(err.Error()), "no such id") {
w.WriteHeader(http.StatusNotFound)
} else if strings.Contains(err.Error(), "no such file or directory") {
return fmt.Errorf("Could not find the file %s in container %s", origResource, vars["name"])
}
}
return nil
}
func (cli *DockerCli) CmdStart(args ...string) error {
var (
cErr chan error
tty bool
cmd = cli.Subcmd("start", "CONTAINER [CONTAINER...]", "Start one or more stopped containers", true)
attach = cmd.Bool([]string{"a", "-attach"}, false, "Attach STDOUT/STDERR and forward signals")
openStdin = cmd.Bool([]string{"i", "-interactive"}, false, "Attach container's STDIN")
)
cmd.Require(flag.Min, 1)
utils.ParseFlags(cmd, args, true)
if *attach || *openStdin {
if cmd.NArg() > 1 {
return fmt.Errorf("You cannot start and attach multiple containers at once.")
}
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
}
config := env.GetSubEnv("Config")
tty = config.GetBool("Tty")
if !tty {
sigc := cli.forwardAllSignals(cmd.Arg(0))
defer signal.StopCatch(sigc)
}
var in io.ReadCloser
v := url.Values{}
v.Set("stream", "1")
if *openStdin && config.GetBool("OpenStdin") {
v.Set("stdin", "1")
in = cli.in
}
v.Set("stdout", "1")
v.Set("stderr", "1")
hijacked := make(chan io.Closer)
// Block the return until the chan gets closed
defer func() {
log.Debugf("CmdStart() returned, defer waiting for hijack to finish.")
if _, ok := <-hijacked; ok {
log.Errorf("Hijack did not finish (chan still open)")
}
cli.in.Close()
}()
cErr = promise.Go(func() error {
return cli.hijack("POST", "/containers/"+cmd.Arg(0)+"/attach?"+v.Encode(), tty, in, cli.out, cli.err, hijacked, nil)
})
// Acknowledge the hijack before starting
select {
case closer := <-hijacked:
// Make sure that the hijack gets closed when returning (results
// in closing the hijack chan and freeing server's goroutines)
if closer != nil {
defer closer.Close()
}
case err := <-cErr:
if err != nil {
return err
}
}
}
var encounteredError error
for _, name := range cmd.Args() {
_, _, err := readBody(cli.call("POST", "/containers/"+name+"/start", nil, false))
if err != nil {
if !*attach && !*openStdin {
// attach and openStdin is false means it could be starting multiple containers
// when a container start failed, show the error message and start next
fmt.Fprintf(cli.err, "%s\n", err)
encounteredError = fmt.Errorf("Error: failed to start one or more containers")
} else {
encounteredError = err
}
} else {
if !*attach && !*openStdin {
fmt.Fprintf(cli.out, "%s\n", name)
}
}
}
if encounteredError != nil {
return encounteredError
}
if *openStdin || *attach {
if tty && cli.isTerminalOut {
if err := cli.monitorTtySize(cmd.Arg(0), false); err != nil {
log.Errorf("Error monitoring TTY size: %s", err)
}
}
if attchErr := <-cErr; attchErr != nil {
return attchErr
}
_, status, err := getExitCode(cli, cmd.Arg(0))
if err != nil {
return err
}
if status != 0 {
return &utils.StatusError{StatusCode: status}
}
}
return nil
}
func (cli *DockerCli) CmdAttach(args ...string) error {
var (
cmd = cli.Subcmd("attach", "CONTAINER", "Attach to a running container", true)
noStdin = cmd.Bool([]string{"#nostdin", "-no-stdin"}, false, "Do not attach STDIN")
proxy = cmd.Bool([]string{"#sig-proxy", "-sig-proxy"}, true, "Proxy all received signals to the process")
)
cmd.Require(flag.Exact, 1)
utils.ParseFlags(cmd, args, true)
name := cmd.Arg(0)
stream, _, err := cli.call("GET", "/containers/"+name+"/json", nil, false)
if err != nil {
return err
}
env := engine.Env{}
if err := env.Decode(stream); err != nil {
return err
}
if !env.GetSubEnv("State").GetBool("Running") {
return fmt.Errorf("You cannot attach to a stopped container, start it first")
}
var (
config = env.GetSubEnv("Config")
tty = config.GetBool("Tty")
)
if err := cli.CheckTtyInput(!*noStdin, tty); err != nil {
return err
}
if tty && cli.isTerminalOut {
if err := cli.monitorTtySize(cmd.Arg(0), false); err != nil {
log.Debugf("Error monitoring TTY size: %s", err)
}
}
var in io.ReadCloser
v := url.Values{}
v.Set("stream", "1")
if !*noStdin && config.GetBool("OpenStdin") {
v.Set("stdin", "1")
in = cli.in
}
v.Set("stdout", "1")
v.Set("stderr", "1")
if *proxy && !tty {
sigc := cli.forwardAllSignals(cmd.Arg(0))
defer signal.StopCatch(sigc)
}
if err := cli.hijack("POST", "/containers/"+cmd.Arg(0)+"/attach?"+v.Encode(), tty, in, cli.out, cli.err, nil, nil); err != nil {
return err
}
_, status, err := getExitCode(cli, cmd.Arg(0))
if err != nil {
return err
}
if status != 0 {
return &utils.StatusError{StatusCode: status}
}
return nil
}