// 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
}
// 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
}
// FIXME: --viz and --tree are deprecated. Remove them in a future version.
func (cli *DockerCli) printTreeNode(noTrunc bool, image *engine.Env, prefix string) {
var imageID string
if noTrunc {
imageID = image.Get("Id")
} else {
imageID = stringid.TruncateID(image.Get("Id"))
}
fmt.Fprintf(cli.out, "%s%s Virtual Size: %s", prefix, imageID, units.HumanSize(float64(image.GetInt64("VirtualSize"))))
if image.GetList("RepoTags")[0] != "<none>:<none>" {
fmt.Fprintf(cli.out, " Tags: %s\n", strings.Join(image.GetList("RepoTags"), ", "))
} else {
fmt.Fprint(cli.out, "\n")
}
}
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 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
}
// FIXME: --viz and --tree are deprecated. Remove them in a future version.
func (cli *DockerCli) printVizNode(noTrunc bool, image *engine.Env, prefix string) {
var (
imageID string
parentID string
)
if noTrunc {
imageID = image.Get("Id")
parentID = image.Get("ParentId")
} else {
imageID = stringid.TruncateID(image.Get("Id"))
parentID = stringid.TruncateID(image.Get("ParentId"))
}
if parentID == "" {
fmt.Fprintf(cli.out, " base -> \"%s\" [style=invis]\n", imageID)
} else {
fmt.Fprintf(cli.out, " \"%s\" -> \"%s\"\n", parentID, imageID)
}
if image.GetList("RepoTags")[0] != "<none>:<none>" {
fmt.Fprintf(cli.out, " \"%s\" [label=\"%s\\n%s\",shape=box,fillcolor=\"paleturquoise\",style=\"filled,rounded\"];\n",
imageID, imageID, strings.Join(image.GetList("RepoTags"), "\\n"))
}
}
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])
}
}