package pods import ( "context" "fmt" "io/ioutil" "os" "strings" "github.com/containers/podman/v2/cmd/podman/common" "github.com/containers/podman/v2/cmd/podman/parse" "github.com/containers/podman/v2/cmd/podman/registry" "github.com/containers/podman/v2/cmd/podman/validate" "github.com/containers/podman/v2/pkg/domain/entities" "github.com/containers/podman/v2/pkg/errorhandling" "github.com/containers/podman/v2/pkg/specgen" "github.com/containers/podman/v2/pkg/util" "github.com/pkg/errors" "github.com/sirupsen/logrus" "github.com/spf13/cobra" "github.com/spf13/pflag" ) var ( podCreateDescription = `After creating the pod, the pod ID is printed to stdout. You can then start it at any time with the podman pod start command. The pod will be created with the initial state 'created'.` createCommand = &cobra.Command{ Use: "create", Args: validate.NoArgs, Short: "Create a new empty pod", Long: podCreateDescription, RunE: create, } ) var ( createOptions entities.PodCreateOptions labels, labelFile []string podIDFile string replace bool share string ) func init() { registry.Commands = append(registry.Commands, registry.CliCommand{ Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode}, Command: createCommand, Parent: podCmd, }) flags := createCommand.Flags() flags.SetInterspersed(false) flags.AddFlagSet(common.GetNetFlags()) flags.StringVar(&createOptions.CGroupParent, "cgroup-parent", "", "Set parent cgroup for the pod") flags.BoolVar(&createOptions.Infra, "infra", true, "Create an infra container associated with the pod to share namespaces with") flags.StringVar(&createOptions.InfraConmonPidFile, "infra-conmon-pidfile", "", "Path to the file that will receive the POD of the infra container's conmon") flags.String("infra-image", containerConfig.Engine.InfraImage, "The image of the infra container to associate with the pod") flags.String("infra-command", containerConfig.Engine.InfraCommand, "The command to run on the infra container when the pod is started") flags.StringSliceVar(&labelFile, "label-file", []string{}, "Read in a line delimited file of labels") flags.StringSliceVarP(&labels, "label", "l", []string{}, "Set metadata on pod (default [])") flags.StringVarP(&createOptions.Name, "name", "n", "", "Assign a name to the pod") flags.StringVarP(&createOptions.Hostname, "hostname", "", "", "Set a hostname to the pod") flags.StringVar(&podIDFile, "pod-id-file", "", "Write the pod ID to the file") flags.BoolVar(&replace, "replace", false, "If a pod with the same exists, replace it") flags.StringVar(&share, "share", specgen.DefaultKernelNamespaces, "A comma delimited list of kernel namespaces the pod will share") flags.SetNormalizeFunc(aliasNetworkFlag) } func aliasNetworkFlag(_ *pflag.FlagSet, name string) pflag.NormalizedName { if name == "net" { name = "network" } return pflag.NormalizedName(name) } func create(cmd *cobra.Command, args []string) error { var ( err error podIDFD *os.File ) createOptions.Labels, err = parse.GetAllLabels(labelFile, labels) if err != nil { return errors.Wrapf(err, "unable to process labels") } if !createOptions.Infra { logrus.Debugf("Not creating an infra container") if cmd.Flag("infra-conmon-pidfile").Changed { return errors.New("cannot set infra-conmon-pid without an infra container") } if cmd.Flag("infra-command").Changed { return errors.New("cannot set infra-command without an infra container") } if cmd.Flag("infra-image").Changed { return errors.New("cannot set infra-image without an infra container") } createOptions.InfraImage = "" if cmd.Flag("share").Changed && share != "none" && share != "" { return fmt.Errorf("cannot set share(%s) namespaces without an infra container", cmd.Flag("share").Value) } createOptions.Share = nil } else { createOptions.Share = strings.Split(share, ",") if cmd.Flag("infra-command").Changed { // Only send content to server side if user changed defaults createOptions.InfraCommand, err = cmd.Flags().GetString("infra-command") if err != nil { return err } } if cmd.Flag("infra-image").Changed { // Only send content to server side if user changed defaults createOptions.InfraImage, err = cmd.Flags().GetString("infra-image") if err != nil { return err } } } if cmd.Flag("pod-id-file").Changed { podIDFD, err = util.OpenExclusiveFile(podIDFile) if err != nil && os.IsExist(err) { return errors.Errorf("pod id file exists. Ensure another pod is not using it or delete %s", podIDFile) } if err != nil { return errors.Errorf("error opening pod-id-file %s", podIDFile) } defer errorhandling.CloseQuiet(podIDFD) defer errorhandling.SyncQuiet(podIDFD) } createOptions.Net, err = common.NetFlagsToNetOptions(cmd) if err != nil { return err } createOptions.Net.Network = specgen.Namespace{} if cmd.Flag("network").Changed { netInput, err := cmd.Flags().GetString("network") if err != nil { return err } parts := strings.SplitN(netInput, ":", 2) n := specgen.Namespace{} switch { case netInput == "bridge": n.NSMode = specgen.Bridge case netInput == "host": n.NSMode = specgen.Host case netInput == "slirp4netns", strings.HasPrefix(netInput, "slirp4netns:"): n.NSMode = specgen.Slirp if len(parts) > 1 { createOptions.Net.NetworkOptions = make(map[string][]string) createOptions.Net.NetworkOptions[parts[0]] = strings.Split(parts[1], ",") } default: // Container and NS mode are presently unsupported n.NSMode = specgen.Bridge createOptions.Net.CNINetworks = strings.Split(netInput, ",") } createOptions.Net.Network = n } if len(createOptions.Net.PublishPorts) > 0 { if !createOptions.Infra { return errors.Errorf("you must have an infra container to publish port bindings to the host") } } createOptions.CreateCommand = os.Args if replace { if err := replacePod(createOptions.Name); err != nil { return err } } response, err := registry.ContainerEngine().PodCreate(context.Background(), createOptions) if err != nil { return err } if len(podIDFile) > 0 { if err = ioutil.WriteFile(podIDFile, []byte(response.Id), 0644); err != nil { return errors.Wrapf(err, "failed to write pod ID to file %q", podIDFile) } } fmt.Println(response.Id) return nil } func replacePod(name string) error { if len(name) == 0 { return errors.New("cannot replace pod without --name being set") } rmOptions := entities.PodRmOptions{ Force: true, // stop and remove pod Ignore: true, // ignore if pod doesn't exist } return removePods([]string{name}, rmOptions, false) }