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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))
// Default used if not overridden on command line
if createConfig.CgroupParent != "" {
options = append(options, libpod.WithCgroupParent(createConfig.CgroupParent))
}
ctr, err := runtime.NewContainer(runtimeSpec, options...)
if err != nil {
return err
}
if logrus.GetLevel() == logrus.DebugLevel {
logrus.Debugf("New container created %q", ctr.ID())
p, _ := ctr.CGroupPath()("")
logrus.Debugf("container %q has CgroupParent %q", ctr.ID(), p)
}
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
}
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()
}
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