package main import ( "fmt" "os" "strconv" "sync" "github.com/pkg/errors" "github.com/projectatomic/libpod/libpod" "github.com/sirupsen/logrus" "github.com/urfave/cli" ) var ( startFlags = []cli.Flag{ cli.BoolFlag{ Name: "attach, a", Usage: "Attach container's STDOUT and STDERR", }, cli.StringFlag{ Name: "detach-keys", Usage: "Override the key sequence for detaching a container. Format is a single character [a-Z] or ctrl- where is one of: a-z, @, ^, [, , or _.", }, cli.BoolFlag{ Name: "interactive, i", Usage: "Keep STDIN open even if not attached", }, } startDescription = ` kpod start Starts one or more containers. The container name or ID can be used. ` startCommand = cli.Command{ Name: "start", Usage: "Start one or more containers", Description: startDescription, Flags: startFlags, Action: startCmd, ArgsUsage: "CONTAINER-NAME [CONTAINER-NAME ...]", UseShortOptionHandling: true, } ) func startCmd(c *cli.Context) error { args := c.Args() if len(args) < 1 { return errors.Errorf("you must provide at least one container name or id") } attach := c.Bool("attach") if len(args) > 1 && attach { return errors.Errorf("you cannot start and attach multiple containers at once") } if err := validateFlags(c, startFlags); err != nil { return err } runtime, err := getRuntime(c) if err != nil { return errors.Wrapf(err, "error creating libpod runtime") } defer runtime.Shutdown(false) var lastError error for _, container := range args { // Create a bool channel to track that the console socket attach // is successful. attached := make(chan bool) // Create a waitgroup so we can sync and wait for all goroutines // to finish before exiting main var wg sync.WaitGroup ctr, err := runtime.LookupContainer(container) if err != nil { if lastError != nil { fmt.Fprintln(os.Stderr, lastError) } lastError = errors.Wrapf(err, "unable to find container %s", container) continue } if err := ctr.Init(); err != nil && errors.Cause(err) != libpod.ErrCtrExists { return err } // We can only be interactive if both the config and the command-line say so if c.Bool("interactive") && !ctr.Config().Stdin { return errors.Errorf("the container was not created with the interactive option") } noStdIn := c.Bool("interactive") tty, err := strconv.ParseBool(ctr.Spec().Annotations["io.kubernetes.cri-o.TTY"]) if err != nil { return errors.Wrapf(err, "unable to parse annotations in %s", ctr.ID()) } // We only get a terminal session if both a tty was specified in the spec and // -a on the command-line was given. if attach && tty { // We increment the wg counter because we need to do the attach wg.Add(1) // Attach to the running container go func() { logrus.Debugf("trying to attach to the container %s", ctr.ID()) defer wg.Done() if err := ctr.Attach(noStdIn, c.String("detach-keys"), attached); err != nil { logrus.Errorf("unable to attach to container %s: %q", ctr.ID(), err) } }() if !<-attached { return errors.Errorf("unable to attach to container %s", ctr.ID()) } } err = ctr.Start() if err != nil { if lastError != nil { fmt.Fprintln(os.Stderr, lastError) } lastError = errors.Wrapf(err, "unable to start %s", container) continue } if !attach { fmt.Println(ctr.ID()) } wg.Wait() } return lastError }