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package main
import (
"encoding/json"
"fmt"
"os"
"strings"
"github.com/pkg/errors"
"github.com/projectatomic/libpod/libpod"
"github.com/projectatomic/libpod/libpod/image"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
var runDescription = "Runs a command in a new container from the given image"
var runFlags []cli.Flag = append(createFlags, cli.BoolTFlag{
Name: "sig-proxy",
Usage: "proxy received signals to the process (default true)",
})
var runCommand = cli.Command{
Name: "run",
Usage: "run a command in a new container",
Description: runDescription,
Flags: runFlags,
Action: runCmd,
ArgsUsage: "IMAGE [COMMAND [ARG...]]",
SkipArgReorder: true,
UseShortOptionHandling: true,
}
func runCmd(c *cli.Context) error {
var imageName string
if err := validateFlags(c, createFlags); err != nil {
return err
}
if c.String("cidfile") != "" {
if _, err := os.Stat(c.String("cidfile")); err == nil {
return errors.Errorf("container id file exists. ensure another container is not using it or delete %s", 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")
}
rtc := runtime.GetConfig()
newImage, err := runtime.ImageRuntime().New(c.Args()[0], rtc.SignaturePolicyPath, "", os.Stderr, nil, image.SigningOptions{})
if err != nil {
return errors.Wrapf(err, "unable to find image")
}
data, err := newImage.Inspect()
if err != nil {
return err
}
if len(newImage.Names()) < 1 {
imageName = newImage.ID()
} else {
imageName = newImage.Names()[0]
}
createConfig, err := parseCreateOpts(c, runtime, imageName, data)
if err != nil {
return err
}
useImageVolumes := createConfig.ImageVolumeType == "bind"
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, useImageVolumes))
options = append(options, libpod.WithSELinuxLabels(createConfig.ProcessLabel, createConfig.MountLabel))
options = append(options, libpod.WithConmonPidFile(createConfig.ConmonPidFile))
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.WithGroups(createConfig.GroupAdd))
// 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)
}
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)
}
}
// Handle detached start
if createConfig.Detach {
if err := ctr.Start(); err != nil {
// This means the command did not exist
exitCode = 127
if strings.Index(err.Error(), "permission denied") > -1 {
exitCode = 126
}
return err
}
fmt.Printf("%s\n", ctr.ID())
exitCode = 0
return nil
}
outputStream := os.Stdout
errorStream := os.Stderr
inputStream := os.Stdin
// If -i is not set, clear stdin
if !c.Bool("interactive") {
inputStream = nil
}
// If attach is set, clear stdin/stdout/stderr and only attach requested
if c.IsSet("attach") {
outputStream = nil
errorStream = nil
inputStream = nil
attachTo := c.StringSlice("attach")
for _, stream := range attachTo {
switch strings.ToLower(stream) {
case "stdout":
outputStream = os.Stdout
case "stderr":
errorStream = os.Stderr
case "stdin":
inputStream = os.Stdin
default:
return errors.Wrapf(libpod.ErrInvalidArg, "invalid stream %q for --attach - must be one of stdin, stdout, or stderr", stream)
}
}
// If --interactive is set, restore stdin
if c.Bool("interactive") {
inputStream = os.Stdin
}
}
attachChan, err := startAttachCtr(ctr, outputStream, errorStream, inputStream, c.String("detach-keys"))
if err != nil {
// This means the command did not exist
exitCode = 127
if strings.Index(err.Error(), "permission denied") > -1 {
exitCode = 126
}
return err
}
if c.BoolT("sig-proxy") {
ProxySignals(ctr)
}
// Wait for attach to complete
err = <-attachChan
if err != nil {
return errors.Wrapf(err, "error attaching to container %s", ctr.ID())
}
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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