package client import ( "encoding/json" "fmt" "net/url" "strings" "text/tabwriter" "github.com/docker/docker/api/types" flag "github.com/docker/docker/pkg/mflag" ) // 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) cmd.ParseFlags(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 } procList := types.ContainerProcessList{} if err := json.NewDecoder(stream).Decode(&procList); err != nil { return err } w := tabwriter.NewWriter(cli.out, 20, 1, 3, ' ', 0) fmt.Fprintln(w, strings.Join(procList.Titles, "\t")) for _, proc := range procList.Processes { fmt.Fprintln(w, strings.Join(proc, "\t")) } w.Flush() return nil }