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package main
import (
"fmt"
"os"
"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"
"github.com/containers/libpod/pkg/rootless"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
var (
// Kernel namespaces shared by default within a pod
DefaultKernelNamespaces = "cgroup,ipc,net,uts"
podCreateCommand cliconfig.PodCreateValues
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'."
_podCreateCommand = &cobra.Command{
Use: "create",
Short: "Create a new empty pod",
Long: podCreateDescription,
RunE: func(cmd *cobra.Command, args []string) error {
podCreateCommand.InputArgs = args
podCreateCommand.GlobalFlags = MainGlobalOpts
return podCreateCmd(&podCreateCommand)
},
}
)
func init() {
podCreateCommand.Command = _podCreateCommand
flags := podCreateCommand.Flags()
flags.SetInterspersed(false)
flags.StringVar(&podCreateCommand.CgroupParent, "cgroup-parent", "", "Set parent cgroup for the pod")
flags.BoolVar(&podCreateCommand.Infra, "infra", true, "Create an infra container associated with the pod to share namespaces with")
flags.StringVar(&podCreateCommand.InfraImage, "infra-image", libpod.DefaultInfraImage, "The image of the infra container to associate with the pod")
flags.StringVar(&podCreateCommand.InfraCommand, "infra-command", libpod.DefaultInfraCommand, "The command to run on the infra container when the pod is started")
flags.StringSliceVar(&podCreateCommand.LabelFile, "label-file", []string{}, "Read in a line delimited file of labels")
flags.StringSliceVarP(&podCreateCommand.Labels, "label", "l", []string{}, "Set metadata on pod (default [])")
flags.StringVarP(&podCreateCommand.Name, "name", "n", "", "Assign a name to the pod")
flags.StringVar(&podCreateCommand.PodIDFile, "pod-id-file", "", "Write the pod ID to the file")
flags.StringSliceVarP(&podCreateCommand.Publish, "publish", "p", []string{}, "Publish a container's port, or a range of ports, to the host (default [])")
flags.StringVar(&podCreateCommand.Share, "share", DefaultKernelNamespaces, "A comma delimited list of kernel namespaces the pod will share")
}
func podCreateCmd(c *cliconfig.PodCreateValues) error {
var options []libpod.PodCreateOption
var err error
runtime, err := libpodruntime.GetRuntime(&c.PodmanCommand)
if err != nil {
return errors.Wrapf(err, "error creating libpod runtime")
}
defer runtime.Shutdown(false)
var podIdFile *os.File
if c.Flag("pod-id-file").Changed && os.Geteuid() == 0 {
podIdFile, err = libpod.OpenExclusiveFile(c.PodIDFile)
if err != nil && os.IsExist(err) {
return errors.Errorf("pod id file exists. Ensure another pod is not using it or delete %s", c.PodIDFile)
}
if err != nil {
return errors.Errorf("error opening pod-id-file %s", c.PodIDFile)
}
defer podIdFile.Close()
defer podIdFile.Sync()
}
if len(c.Publish) > 0 {
if !c.Infra {
return errors.Errorf("you must have an infra container to publish port bindings to the host")
}
if rootless.IsRootless() {
return errors.Errorf("rootless networking does not allow port binding to the host")
}
}
if !c.Infra && c.Flag("share").Changed && c.Share != "none" && c.Share != "" {
return errors.Errorf("You cannot share kernel namespaces on the pod level without an infra container")
}
if c.Flag("cgroup-parent").Changed {
options = append(options, libpod.WithPodCgroupParent(c.CgroupParent))
}
labels, err := getAllLabels(c.LabelFile, c.Labels)
if err != nil {
return errors.Wrapf(err, "unable to process labels")
}
if len(labels) != 0 {
options = append(options, libpod.WithPodLabels(labels))
}
if c.Flag("name").Changed {
options = append(options, libpod.WithPodName(c.Name))
}
if c.Infra {
options = append(options, libpod.WithInfraContainer())
nsOptions, err := shared.GetNamespaceOptions(strings.Split(c.Share, ","))
if err != nil {
return err
}
options = append(options, nsOptions...)
}
if len(c.Publish) > 0 {
portBindings, err := shared.CreatePortBindings(c.Publish)
if err != nil {
return err
}
options = append(options, libpod.WithInfraContainerPorts(portBindings))
}
// 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 podIdFile != nil {
_, err = podIdFile.WriteString(pod.ID())
if err != nil {
logrus.Error(err)
}
}
fmt.Printf("%s\n", pod.ID())
return nil
}
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