package main import ( "encoding/json" "fmt" "strings" "sync" "github.com/pkg/errors" "github.com/projectatomic/libpod/libpod" "github.com/sirupsen/logrus" "github.com/urfave/cli" ) var runDescription = "Runs a command in a new container from the given image" var runCommand = cli.Command{ Name: "run", Usage: "run a command in a new container", Description: runDescription, Flags: createFlags, Action: runCmd, ArgsUsage: "IMAGE [COMMAND [ARG...]]", SkipArgReorder: true, UseShortOptionHandling: true, } func runCmd(c *cli.Context) error { if err := validateFlags(c, createFlags); err != nil { return err } if c.String("cidfile") != "" { if err := libpod.WriteFile("", c.String("cidfile")); err != nil { return errors.Wrapf(err, "unable to write cidfile %s", c.String("cidfile")) } } runtime, err := getRuntime(c) if err != nil { return errors.Wrapf(err, "error creating libpod runtime") } defer runtime.Shutdown(false) if len(c.Args()) < 1 { return errors.Errorf("image name or ID is required") } imageName, _, data, err := imageData(c, runtime, c.Args()[0]) if err != nil { return err } createConfig, err := parseCreateOpts(c, runtime, imageName, data) if err != nil { return err } runtimeSpec, err := createConfigToOCISpec(createConfig) if err != nil { return err } options, err := createConfig.GetContainerCreateOptions() if err != nil { return errors.Wrapf(err, "unable to parse new container options") } // Gather up the options for NewContainer which consist of With... funcs options = append(options, libpod.WithRootFSFromImage(createConfig.ImageID, createConfig.Image, true)) options = append(options, libpod.WithSELinuxLabels(createConfig.ProcessLabel, createConfig.MountLabel)) options = append(options, libpod.WithLabels(createConfig.Labels)) options = append(options, libpod.WithUser(createConfig.User)) options = append(options, libpod.WithShmDir(createConfig.ShmDir)) options = append(options, libpod.WithShmSize(createConfig.Resources.ShmSize)) options = append(options, libpod.WithCgroupParent(createConfig.CgroupParent)) ctr, err := runtime.NewContainer(runtimeSpec, options...) if err != nil { return err } logrus.Debug("new container created ", ctr.ID()) p, _ := ctr.CGroupPath()("") logrus.Debugf("createConfig.CgroupParent %v for %v", p, ctr.ID()) if err := ctr.Init(); err != nil { // This means the command did not exist exitCode = 127 if strings.Index(err.Error(), "permission denied") > -1 { exitCode = 126 } return err } logrus.Debugf("container storage created for %q", ctr.ID()) createConfigJSON, err := json.Marshal(createConfig) if err != nil { return err } if err := ctr.AddArtifact("create-config", createConfigJSON); err != nil { return err } logrus.Debug("new container created ", ctr.ID()) if c.String("cidfile") != "" { if err := libpod.WriteFile(ctr.ID(), c.String("cidfile")); err != nil { logrus.Error(err) } } // 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 if !createConfig.Detach { // 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(false, 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()) } } // Start the container if err := ctr.Start(); err != nil { return errors.Wrapf(err, "unable to start container %q", ctr.ID()) } if createConfig.Detach { fmt.Printf("%s\n", ctr.ID()) exitCode = 0 return nil } wg.Wait() if ecode, err := ctr.ExitCode(); err != nil { logrus.Errorf("unable to get exit code of container %s: %q", ctr.ID(), err) } else { exitCode = int(ecode) } if createConfig.Rm { return runtime.RemoveContainer(ctr, true) } return ctr.Cleanup() }