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package main
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strconv"
"strings"
"github.com/containers/libpod/cmd/podman/cliconfig"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/containers/libpod/cmd/podman/shared"
"github.com/containers/libpod/libpod"
opentracing "github.com/opentracing/opentracing-go"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
var (
runCommand cliconfig.RunValues
runDescription = "Runs a command in a new container from the given image"
_runCommand = &cobra.Command{
Use: "run [flags] IMAGE [COMMAND [ARG...]]",
Short: "Run a command in a new container",
Long: runDescription,
RunE: func(cmd *cobra.Command, args []string) error {
runCommand.InputArgs = args
runCommand.GlobalFlags = MainGlobalOpts
return runCmd(&runCommand)
},
Example: `podman run imageID ls -alF /etc
podman run --net=host imageID dnf -y install java
podman run --volume /var/hostdir:/var/ctrdir -i -t fedora /bin/bash`,
}
)
func init() {
runCommand.Command = _runCommand
runCommand.SetHelpTemplate(HelpTemplate())
runCommand.SetUsageTemplate(UsageTemplate())
flags := runCommand.Flags()
flags.SetInterspersed(false)
flags.Bool("sig-proxy", true, "Proxy received signals to the process")
getCreateFlags(&runCommand.PodmanCommand)
}
func runCmd(c *cliconfig.RunValues) error {
if c.Bool("trace") {
span, _ := opentracing.StartSpanFromContext(Ctx, "runCmd")
defer span.Finish()
}
if err := createInit(&c.PodmanCommand); err != nil {
return err
}
runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
defer runtime.Shutdown(false)
ctr, createConfig, err := shared.CreateContainer(getContext(), &c.PodmanCommand, runtime)
if err != nil {
return err
}
if logrus.GetLevel() == logrus.DebugLevel {
cgroupPath, err := ctr.CGroupPath()
if err == nil {
logrus.Debugf("container %q has CgroupParent %q", ctr.ID(), cgroupPath)
}
}
ctx := getContext()
// Handle detached start
if createConfig.Detach {
// if the container was created as part of a pod, also start its dependencies, if any.
if err := ctr.Start(ctx, c.IsSet("pod")); 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") || c.IsSet("a") {
outputStream = nil
errorStream = nil
if !c.Bool("interactive") {
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 the container was created as part of a pod, also start its dependencies, if any.
if err := startAttachCtr(ctr, outputStream, errorStream, inputStream, c.String("detach-keys"), c.Bool("sig-proxy"), true, c.IsSet("pod")); err != nil {
// We've manually detached from the container
// Do not perform cleanup, or wait for container exit code
// Just exit immediately
if errors.Cause(err) == libpod.ErrDetach {
exitCode = 0
return nil
}
// This means the command did not exist
exitCode = 127
if strings.Index(err.Error(), "permission denied") > -1 {
exitCode = 126
}
if c.IsSet("rm") {
if deleteError := runtime.RemoveContainer(ctx, ctr, true, false); deleteError != nil {
logrus.Errorf("unable to remove container %s after failing to start and attach to it", ctr.ID())
}
}
return err
}
if ecode, err := ctr.Wait(); err != nil {
if errors.Cause(err) == libpod.ErrNoSuchCtr {
// The container may have been removed
// Go looking for an exit file
rtc, err := runtime.GetConfig()
if err != nil {
return err
}
ctrExitCode, err := readExitFile(rtc.TmpDir, ctr.ID())
if err != nil {
logrus.Errorf("Cannot get exit code: %v", err)
exitCode = 127
} else {
exitCode = ctrExitCode
}
}
} else {
exitCode = int(ecode)
}
if c.IsSet("rm") {
runtime.RemoveContainer(ctx, ctr, false, true)
}
return nil
}
// Read a container's exit file
func readExitFile(runtimeTmp, ctrID string) (int, error) {
exitFile := filepath.Join(runtimeTmp, "exits", fmt.Sprintf("%s-old", ctrID))
logrus.Debugf("Attempting to read container %s exit code from file %s", ctrID, exitFile)
// Check if it exists
if _, err := os.Stat(exitFile); err != nil {
return 0, errors.Wrapf(err, "error getting exit file for container %s", ctrID)
}
// File exists, read it in and convert to int
statusStr, err := ioutil.ReadFile(exitFile)
if err != nil {
return 0, errors.Wrapf(err, "error reading exit file for container %s", ctrID)
}
exitCode, err := strconv.Atoi(string(statusStr))
if err != nil {
return 0, errors.Wrapf(err, "error parsing exit code for container %s", ctrID)
}
return exitCode, nil
}
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