// CmdTop displays the running processes of a container.
//
// Usage: docker top CONTAINER
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, nil)
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 TestPostCommit(t *testing.T) {
eng := NewTestEngine(t)
defer mkDaemonFromEngine(eng, t).Nuke()
// Create a container and remove a file
containerID := createTestContainer(eng,
&runconfig.Config{
Image: unitTestImageID,
Cmd: []string{"touch", "/test"},
},
t,
)
containerRun(eng, containerID, t)
req, err := http.NewRequest("POST", "/commit?repo=testrepo&testtag=tag&container="+containerID, bytes.NewReader([]byte{}))
if err != nil {
t.Fatal(err)
}
r := httptest.NewRecorder()
server.ServeRequest(eng, api.APIVERSION, r, req)
assertHttpNotError(r, t)
if r.Code != http.StatusCreated {
t.Fatalf("%d Created expected, received %d\n", http.StatusCreated, r.Code)
}
var env engine.Env
if err := env.Decode(r.Body); err != nil {
t.Fatal(err)
}
if err := eng.Job("image_inspect", env.Get("Id")).Run(); err != nil {
t.Fatalf("The image has not been committed")
}
}
// CmdCommit creates a new image from a container's changes.
//
// Usage: docker commit [OPTIONS] CONTAINER [REPOSITORY[:TAG]]
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, nil)
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 postContainersSet(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 (
setData engine.Env
config []struct {
Key string
Value string
}
)
if contentType := r.Header.Get("Content-Type"); api.MatchesContentType(contentType, "application/json") {
if err := setData.Decode(r.Body); err != nil {
return err
}
} else {
return fmt.Errorf("Content-Type not supported: %s", contentType)
}
if err := setData.GetJson("config", &config); err != nil {
return err
}
job := eng.Job("container_set", vars["name"])
job.SetenvJson("config", config)
job.Stdout.Add(w)
if err := job.Run(); err != nil {
return err
}
return nil
}
func TestPostContainersWait(t *testing.T) {
eng := NewTestEngine(t)
defer mkDaemonFromEngine(eng, t).Nuke()
containerID := createTestContainer(eng,
&runconfig.Config{
Image: unitTestImageID,
Cmd: []string{"/bin/sleep", "1"},
OpenStdin: true,
},
t,
)
startContainer(eng, containerID, t)
setTimeout(t, "Wait timed out", 3*time.Second, func() {
r := httptest.NewRecorder()
req, err := http.NewRequest("POST", "/containers/"+containerID+"/wait", bytes.NewReader([]byte{}))
if err != nil {
t.Fatal(err)
}
server.ServeRequest(eng, api.APIVERSION, r, req)
assertHttpNotError(r, t)
var apiWait engine.Env
if err := apiWait.Decode(r.Body); err != nil {
t.Fatal(err)
}
if apiWait.GetInt("StatusCode") != 0 {
t.Fatalf("Non zero exit code for sleep: %d\n", apiWait.GetInt("StatusCode"))
}
})
if containerRunning(eng, containerID, t) {
t.Fatalf("The container should be stopped after wait")
}
}
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 := config.Decode(r.Body); err != nil {
utils.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.SetenvSubEnv("config", &config)
job.Stdout.Add(stdoutBuffer)
if err := job.Run(); err != nil {
return err
}
env.Set("Id", engine.Tail(stdoutBuffer, 1))
return writeJSON(w, http.StatusCreated, env)
}
// Issue 7941 - test to make sure a "null" in JSON is just ignored.
// W/o this fix a null in JSON would be parsed into a string var as "null"
func TestPostCreateNull(t *testing.T) {
eng := NewTestEngine(t)
daemon := mkDaemonFromEngine(eng, t)
defer daemon.Nuke()
configStr := fmt.Sprintf(`{
"Hostname":"",
"Domainname":"",
"Memory":0,
"MemorySwap":0,
"CpuShares":0,
"Cpuset":null,
"AttachStdin":true,
"AttachStdout":true,
"AttachStderr":true,
"PortSpecs":null,
"ExposedPorts":{},
"Tty":true,
"OpenStdin":true,
"StdinOnce":true,
"Env":[],
"Cmd":"ls",
"Image":"%s",
"Volumes":{},
"WorkingDir":"",
"Entrypoint":null,
"NetworkDisabled":false,
"OnBuild":null}`, unitTestImageID)
req, err := http.NewRequest("POST", "/containers/create", strings.NewReader(configStr))
if err != nil {
t.Fatal(err)
}
req.Header.Set("Content-Type", "application/json")
r := httptest.NewRecorder()
if err := server.ServeRequest(eng, api.APIVERSION, r, req); err != nil {
t.Fatal(err)
}
assertHttpNotError(r, t)
if r.Code != http.StatusCreated {
t.Fatalf("%d Created expected, received %d\n", http.StatusCreated, r.Code)
}
var apiRun engine.Env
if err := apiRun.Decode(r.Body); err != nil {
t.Fatal(err)
}
containerID := apiRun.Get("Id")
containerAssertExists(eng, containerID, t)
c := daemon.Get(containerID)
if c.Config.Cpuset != "" {
t.Fatalf("Cpuset should have been empty - instead its:" + c.Config.Cpuset)
}
}
// TODO: Krane clean up because i needed to add Ship to String
func (cli *KraneCli) createContainer(config *runconfig.Config, hostConfig *runconfig.HostConfig, cidfile, name string, ship string) (engine.Env, error) {
containerValues := url.Values{}
if name != "" {
containerValues.Set("name", name)
}
if ship != "" {
containerValues.Set("ship", ship)
}
mergedConfig := runconfig.MergeConfigs(config, hostConfig)
var containerIDFile *cidFile
if cidfile != "" {
var err error
if containerIDFile, err = newCIDFile(cidfile); err != nil {
return nil, err
}
defer containerIDFile.Close()
}
//create the container
stream, statusCode, err := cli.call("POST", "/containers/create?"+containerValues.Encode(), mergedConfig, false)
//if image not found try to pull it
if statusCode == 404 {
fmt.Fprintf(cli.err, "Unable to find image '%s' locally\n", config.Image)
// we don't want to write to stdout anything apart from container.ID
if err = cli.pullImageCustomOut(config.Image, cli.err); err != nil {
return nil, err
}
// Retry
if stream, _, err = cli.call("POST", "/containers/create?"+containerValues.Encode(), mergedConfig, false); err != nil {
return nil, err
}
} else if err != nil {
return nil, err
}
var result engine.Env
if err := result.Decode(stream); err != nil {
return nil, err
}
for _, warning := range result.GetList("Warnings") {
fmt.Fprintf(cli.err, "WARNING: %s\n", warning)
}
if containerIDFile != nil {
if err = containerIDFile.Write(result.Get("Id")); err != nil {
return nil, err
}
}
return result, 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
}
// CmdPort lists port mappings for a container.
// If a private port is specified, it also shows the public-facing port that is NATed to the private port.
//
// Usage: docker port CONTAINER [PRIVATE_PORT[/PROTO]]
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, nil)
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
}
// getExitCode perform an inspect on the container. It returns
// the running state and the exit code.
func getExitCode(cli *DockerCli, containerId string) (bool, int, error) {
steam, _, err := cli.call("GET", "/containers/"+containerId+"/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(steam); err != nil {
return false, -1, err
}
state := result.GetSubEnv("State")
return state.GetBool("Running"), state.GetInt("ExitCode"), nil
}
func ContainerCreate(job *engine.Job) engine.Status {
configuration := job.Eng.Hack_GetGlobalVar("configuration").(types.KraneConfiguration)
config := runconfig.ContainerConfigFromJob(job)
if len(job.Args) != 2 {
return job.Errorf("Usage: %s CONTAINER\n", job.Name)
}
ship := configuration.Production.Fleet.Find(job.Args[1])
containerValues := url.Values{}
containerValues.Set("name", job.Args[0])
cli := client.NewKraneClientApi(ship, false, job)
stream, statusCode, err := cli.Call("POST", "/containers/create?"+containerValues.Encode(), config, false)
if statusCode == 404 {
job.Printf("Unable to find image '%s' in %s://%s:%d\n", config.Image, ship.Schema, ship.Fqdn, ship.Port)
if err = pullImage(job, config.Image, ship); err != nil {
return job.Errorf("Cannot pull image %s: %s\n", config.Image, err)
}
if stream, _, err = cli.Call("POST", "/containers/create?"+containerValues.Encode(), config, false); err != nil {
return job.Errorf("Cannot create container: %s\n", err)
}
} else if err != nil {
return job.Errorf("Cannot create container: %s\n", err)
}
var runResult engine.Env
if err := runResult.Decode(stream); err != nil {
return job.Errorf("Error with container: %s\n", err)
}
for _, warning := range runResult.GetList("Warnings") {
job.Stdout.Write([]byte(fmt.Sprintf("WARNING: %s\n", warning)))
}
job.Stdout.Write([]byte(runResult.Get("Id")))
return engine.StatusOK
}
func postContainersCgroup(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")
}
saveToFile, err := getBoolParam(r.FormValue("w"))
if err != nil {
return err
}
var (
cgroupData engine.Env
readSubsystem []string
writeSubsystem []struct {
Key string
Value string
}
)
if contentType := r.Header.Get("Content-Type"); api.MatchesContentType(contentType, "application/json") {
if err := cgroupData.Decode(r.Body); err != nil {
return err
}
} else {
return fmt.Errorf("Content-Type not supported: %s", contentType)
}
readSubsystem = cgroupData.GetList("ReadSubsystem")
if err := cgroupData.GetJson("WriteSubsystem", &writeSubsystem); err != nil {
return err
}
job := eng.Job("cgroup", vars["name"])
job.SetenvList("readSubsystem", readSubsystem)
job.SetenvJson("writeSubsystem", writeSubsystem)
job.SetenvBool("saveToFile", saveToFile)
job.Stdout.Add(w)
if err := job.Run(); err != nil {
return err
}
return nil
}
func TestPostContainersCreate(t *testing.T) {
eng := NewTestEngine(t)
defer mkDaemonFromEngine(eng, t).Nuke()
configJSON, err := json.Marshal(&runconfig.Config{
Image: unitTestImageID,
Memory: 33554432,
Cmd: []string{"touch", "/test"},
})
if err != nil {
t.Fatal(err)
}
req, err := http.NewRequest("POST", "/containers/create", bytes.NewReader(configJSON))
if err != nil {
t.Fatal(err)
}
req.Header.Set("Content-Type", "application/json")
r := httptest.NewRecorder()
if err := server.ServeRequest(eng, api.APIVERSION, r, req); err != nil {
t.Fatal(err)
}
assertHttpNotError(r, t)
if r.Code != http.StatusCreated {
t.Fatalf("%d Created expected, received %d\n", http.StatusCreated, r.Code)
}
var apiRun engine.Env
if err := apiRun.Decode(r.Body); err != nil {
t.Fatal(err)
}
containerID := apiRun.Get("Id")
containerAssertExists(eng, containerID, t)
containerRun(eng, containerID, t)
if !containerFileExists(eng, containerID, "test", t) {
t.Fatal("Test file was not created")
}
}
// CmdLogs fetches the logs of a given container.
//
// docker logs [OPTIONS] CONTAINER
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, nil)
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 (daemon *Daemon) ContainerCommit(name string, c *ContainerCommitConfig) (string, error) {
container, err := daemon.Get(name)
if err != nil {
return "", err
}
var (
subenv engine.Env
config = container.Config
stdoutBuffer = bytes.NewBuffer(nil)
newConfig runconfig.Config
)
if err := subenv.Decode(c.Config); err != nil {
logrus.Errorf("%s", err)
}
buildConfigJob := daemon.eng.Job("build_config")
buildConfigJob.Stdout.Add(stdoutBuffer)
buildConfigJob.SetenvList("changes", c.Changes)
// FIXME this should be remove when we remove deprecated config param
buildConfigJob.SetenvSubEnv("config", &subenv)
if err := buildConfigJob.Run(); err != nil {
return "", err
}
if err := json.NewDecoder(stdoutBuffer).Decode(&newConfig); err != nil {
return "", err
}
if err := runconfig.Merge(&newConfig, config); err != nil {
return "", err
}
img, err := daemon.Commit(container, c.Repo, c.Tag, c.Comment, c.Author, c.Pause, &newConfig)
if err != nil {
return "", err
}
return img.ID, nil
}
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("%s", err.Error())
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 TestGetContainersTop(t *testing.T) {
eng := NewTestEngine(t)
defer mkDaemonFromEngine(eng, t).Nuke()
containerID := createTestContainer(eng,
&runconfig.Config{
Image: unitTestImageID,
Cmd: []string{"/bin/sh", "-c", "cat"},
OpenStdin: true,
},
t,
)
defer func() {
// Make sure the process dies before destroying daemon
containerKill(eng, containerID, t)
containerWait(eng, containerID, t)
}()
startContainer(eng, containerID, t)
setTimeout(t, "Waiting for the container to be started timed out", 10*time.Second, func() {
for {
if containerRunning(eng, containerID, t) {
break
}
time.Sleep(10 * time.Millisecond)
}
})
if !containerRunning(eng, containerID, t) {
t.Fatalf("Container should be running")
}
// Make sure sh spawn up cat
setTimeout(t, "read/write assertion timed out", 2*time.Second, func() {
in, out := containerAttach(eng, containerID, t)
if err := assertPipe("hello\n", "hello", out, in, 150); err != nil {
t.Fatal(err)
}
})
r := httptest.NewRecorder()
req, err := http.NewRequest("GET", "/containers/"+containerID+"/top?ps_args=aux", nil)
if err != nil {
t.Fatal(err)
}
if err := server.ServeRequest(eng, api.APIVERSION, r, req); err != nil {
t.Fatal(err)
}
assertHttpNotError(r, t)
var procs engine.Env
if err := procs.Decode(r.Body); err != nil {
t.Fatal(err)
}
if len(procs.GetList("Titles")) != 11 {
t.Fatalf("Expected 11 titles, found %d.", len(procs.GetList("Titles")))
}
if procs.GetList("Titles")[0] != "USER" || procs.GetList("Titles")[10] != "COMMAND" {
t.Fatalf("Expected Titles[0] to be USER and Titles[10] to be COMMAND, found %s and %s.", procs.GetList("Titles")[0], procs.GetList("Titles")[10])
}
processes := [][]string{}
if err := procs.GetJson("Processes", &processes); err != nil {
t.Fatal(err)
}
if len(processes) != 2 {
t.Fatalf("Expected 2 processes, found %d.", len(processes))
}
if processes[0][10] != "/bin/sh -c cat" {
t.Fatalf("Expected `/bin/sh -c cat`, found %s.", processes[0][10])
}
if processes[1][10] != "/bin/sh -c cat" {
t.Fatalf("Expected `/bin/sh -c cat`, found %s.", processes[1][10])
}
}
// CmdAttach attaches to a running container.
//
// Usage: docker attach [OPTIONS] CONTAINER
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, nil)
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 {
logrus.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
}
// CmdStart starts one or more stopped containers.
//
// Usage: docker start [OPTIONS] CONTAINER [CONTAINER...]
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)
cmd.ParseFlags(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, nil)
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() {
logrus.Debugf("CmdStart() returned, defer waiting for hijack to finish.")
if _, ok := <-hijacked; ok {
logrus.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, nil))
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 {
logrus.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 StatusError{StatusCode: status}
}
}
return nil
}
