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package main
import (
"fmt"
"os"
"strings"
"github.com/containers/libpod/cmd/podman/libpodruntime"
"github.com/containers/libpod/libpod"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/urfave/cli"
)
var (
// CRI-O default kernel namespaces
DefaultKernelNamespaces = "ipc,net,uts"
)
var podCreateDescription = "Creates a new empty pod. The pod ID is then" +
" printed to stdout. You can then start it at any time with the" +
" podman pod start <pod_id> command. The pod will be created with the" +
" initial state 'created'."
var podCreateFlags = []cli.Flag{
cli.StringFlag{
Name: "cgroup-parent",
Usage: "Set parent cgroup for the pod",
},
cli.StringSliceFlag{
Name: "label-file",
Usage: "Read in a line delimited file of labels (default [])",
},
cli.StringSliceFlag{
Name: "label, l",
Usage: "Set metadata on pod (default [])",
},
cli.StringFlag{
Name: "name, n",
Usage: "Assign a name to the pod",
},
cli.BoolTFlag{
Name: "pause",
Usage: "Create a pause container associated with the pod to share namespaces with",
},
cli.StringFlag{
Name: "pause-image",
Usage: "The image of the pause container to associate with the pod",
},
cli.StringFlag{
Name: "pause-command",
Usage: "The command to run on the pause container when the pod is started",
},
cli.StringFlag{
Name: "pod-id-file",
Usage: "Write the pod ID to the file",
},
cli.StringFlag{
Name: "share",
Usage: "A comma deliminated list of kernel namespaces the pod will share",
Value: DefaultKernelNamespaces,
},
}
var podCreateCommand = cli.Command{
Name: "create",
Usage: "Create a new empty pod",
Description: podCreateDescription,
Flags: podCreateFlags,
Action: podCreateCmd,
SkipArgReorder: true,
UseShortOptionHandling: true,
}
func podCreateCmd(c *cli.Context) error {
var options []libpod.PodCreateOption
var err error
if err = validateFlags(c, createFlags); err != nil {
return err
}
runtime, err := libpodruntime.GetRuntime(c)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
defer runtime.Shutdown(false)
if c.IsSet("pod-id-file") {
if _, err = os.Stat(c.String("pod-id-file")); err == nil {
return errors.Errorf("pod id file exists. ensure another pod is not using it or delete %s", c.String("pod-id-file"))
}
if err = libpod.WriteFile("", c.String("pod-id-file")); err != nil {
return errors.Wrapf(err, "unable to write pod id file %s", c.String("pod-id-file"))
}
}
if !c.BoolT("pause") && c.IsSet("share") && c.String("share") != "none" && c.String("share") != "" {
return errors.Errorf("You cannot share kernel namespaces on the pod level without a pause container")
}
if c.IsSet("cgroup-parent") {
options = append(options, libpod.WithPodCgroupParent(c.String("cgroup-parent")))
}
labels, err := getAllLabels(c.StringSlice("label-file"), c.StringSlice("label"))
if err != nil {
return errors.Wrapf(err, "unable to process labels")
}
if len(labels) != 0 {
options = append(options, libpod.WithPodLabels(labels))
}
if c.IsSet("name") {
options = append(options, libpod.WithPodName(c.String("name")))
}
if c.BoolT("pause") {
options = append(options, libpod.WithPauseContainer())
for _, toShare := range strings.Split(c.String("share"), ",") {
switch toShare {
case "net":
options = append(options, libpod.WithPodNet())
case "mnt":
//options = append(options, libpod.WithPodMNT())
logrus.Debug("Mount Namespace sharing functionality not supported")
case "pid":
options = append(options, libpod.WithPodPID())
case "user":
// Note: more set up needs to be done before this doesn't error out a create.
logrus.Debug("User Namespace sharing functionality not supported")
case "ipc":
options = append(options, libpod.WithPodIPC())
case "uts":
options = append(options, libpod.WithPodUTS())
case "":
case "none":
continue
default:
return errors.Errorf("Invalid kernel namespace to share: %s. Options are: %s, or none", toShare, strings.Join(libpod.KernelNamespaces, ","))
}
}
}
// always have containers use pod cgroups
// User Opt out is not yet supported
options = append(options, libpod.WithPodCgroups())
ctx := getContext()
pod, err := runtime.NewPod(ctx, options...)
if err != nil {
return err
}
if c.IsSet("pod-id-file") {
err = libpod.WriteFile(pod.ID(), c.String("pod-id-file"))
if err != nil {
logrus.Error(err)
}
}
fmt.Printf("%s\n", pod.ID())
return nil
}
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