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