package pods import ( "context" "errors" "fmt" "io/ioutil" "os" "runtime" "sort" "strconv" "strings" "github.com/containers/common/pkg/completion" "github.com/containers/common/pkg/sysinfo" "github.com/containers/podman/v4/cmd/podman/common" "github.com/containers/podman/v4/cmd/podman/containers" "github.com/containers/podman/v4/cmd/podman/parse" "github.com/containers/podman/v4/cmd/podman/registry" "github.com/containers/podman/v4/libpod/define" "github.com/containers/podman/v4/pkg/domain/entities" "github.com/containers/podman/v4/pkg/errorhandling" "github.com/containers/podman/v4/pkg/specgen" "github.com/containers/podman/v4/pkg/specgenutil" "github.com/containers/podman/v4/pkg/util" "github.com/docker/docker/pkg/parsers" "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 [options] [NAME]", Args: cobra.MaximumNArgs(1), Short: "Create a new empty pod", Long: podCreateDescription, RunE: create, ValidArgsFunction: completion.AutocompleteNone, Example: `podman pod create podman pod create --label foo=bar mypod`, } ) var ( createOptions entities.PodCreateOptions infraOptions = entities.NewInfraContainerCreateOptions() infraImage string labels, labelFile []string podIDFile string replace bool share string shareParent bool ) func init() { registry.Commands = append(registry.Commands, registry.CliCommand{ Command: createCommand, Parent: podCmd, }) flags := createCommand.Flags() flags.SetInterspersed(false) common.DefineCreateDefaults(&infraOptions) common.DefineCreateFlags(createCommand, &infraOptions, true, false) common.DefineNetFlags(createCommand) flags.BoolVar(&createOptions.Infra, "infra", true, "Create an infra container associated with the pod to share namespaces with") nameFlagName := "name" flags.StringVarP(&createOptions.Name, nameFlagName, "n", "", "Assign a name to the pod") _ = createCommand.RegisterFlagCompletionFunc(nameFlagName, completion.AutocompleteNone) policyFlag := "exit-policy" flags.StringVarP(&createOptions.ExitPolicy, policyFlag, "", string(containerConfig.Engine.PodExitPolicy), "Behaviour when the last container exits") _ = createCommand.RegisterFlagCompletionFunc(policyFlag, common.AutocompletePodExitPolicy) infraImageFlagName := "infra-image" var defInfraImage string if !registry.IsRemote() { defInfraImage = containerConfig.Engine.InfraImage } flags.StringVar(&infraImage, infraImageFlagName, defInfraImage, "Image to use to override builtin infra container") _ = createCommand.RegisterFlagCompletionFunc(infraImageFlagName, common.AutocompleteImages) podIDFileFlagName := "pod-id-file" flags.StringVar(&podIDFile, podIDFileFlagName, "", "Write the pod ID to the file") _ = createCommand.RegisterFlagCompletionFunc(podIDFileFlagName, completion.AutocompleteDefault) flags.BoolVar(&replace, "replace", false, "If a pod with the same name exists, replace it") shareFlagName := "share" flags.StringVar(&share, shareFlagName, specgen.DefaultKernelNamespaces, "A comma delimited list of kernel namespaces the pod will share") _ = createCommand.RegisterFlagCompletionFunc(shareFlagName, common.AutocompletePodShareNamespace) shareParentFlagName := "share-parent" flags.BoolVar(&shareParent, shareParentFlagName, true, "Set the pod's cgroup as the cgroup parent for all containers joining the pod") 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 imageName string rawImageName string podName string ) if len(args) > 0 { if len(createOptions.Name) > 0 { return fmt.Errorf("cannot specify --name and NAME at the same time") } createOptions.Name = args[0] } labelFile = infraOptions.LabelFile labels = infraOptions.Label createOptions.Labels, err = parse.GetAllLabels(labelFile, labels) if err != nil { return fmt.Errorf("unable to process labels: %w", err) } if cmd.Flag("infra-image").Changed { imageName = infraImage } img := imageName if !createOptions.Infra { if cmd.Flag("no-hosts").Changed { return fmt.Errorf("cannot specify --no-hosts without an infra container") } flags := cmd.Flags() createOptions.Net, err = common.NetFlagsToNetOptions(nil, *flags) if err != nil { return err } logrus.Debugf("Not creating an infra container") createOptions.InfraImage = "" if createOptions.InfraName != "" { return errors.New("cannot set infra-name without an infra container") } 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 { // reassign certain options for lbpod api, these need to be populated in spec flags := cmd.Flags() infraOptions.Net, err = common.NetFlagsToNetOptions(nil, *flags) if err != nil { return err } infraOptions, err = containers.CreateInit(cmd, infraOptions, true) if err != nil { return err } if strings.Contains(share, "cgroup") && shareParent { return fmt.Errorf("cannot define the pod as the cgroup parent at the same time as joining the infra container's cgroupNS: %w", define.ErrInvalidArg) } if strings.HasPrefix(share, "+") { createOptions.Share = append(createOptions.Share, strings.Split(specgen.DefaultKernelNamespaces, ",")...) share = share[1:] } createOptions.Share = append(createOptions.Share, strings.Split(share, ",")...) createOptions.ShareParent = &shareParent if cmd.Flag("infra-command").Changed { // Only send content to server side if user changed defaults cmdIn, err := cmd.Flags().GetString("infra-command") infraOptions.Entrypoint = &cmdIn if err != nil { return err } } podName = createOptions.Name err = common.ContainerToPodOptions(&infraOptions, &createOptions) if err != nil { return err } createOptions.Name = podName } if cmd.Flag("pod-id-file").Changed { podIDFD, err = util.OpenExclusiveFile(podIDFile) if err != nil && os.IsExist(err) { return fmt.Errorf("pod id file exists. Ensure another pod is not using it or delete %s", podIDFile) } if err != nil { return fmt.Errorf("opening pod-id-file %s", podIDFile) } defer errorhandling.CloseQuiet(podIDFD) defer errorhandling.SyncQuiet(podIDFD) } if len(createOptions.Net.PublishPorts) > 0 { if !createOptions.Infra { return fmt.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 } } numCPU := sysinfo.NumCPU() if numCPU == 0 { numCPU = runtime.NumCPU() } if createOptions.Cpus > float64(numCPU) { createOptions.Cpus = float64(numCPU) } copy := infraOptions.CPUSetCPUs cpuSet := infraOptions.CPUS if cpuSet == 0 { cpuSet = float64(sysinfo.NumCPU()) } ret, err := parsers.ParseUintList(copy) copy = "" if err != nil { return fmt.Errorf("could not parse list: %w", err) } var vals []int for ind, val := range ret { if val { vals = append(vals, ind) } } sort.Ints(vals) for ind, core := range vals { switch { case core > int(cpuSet): if copy == "" { copy = "0-" + strconv.Itoa(int(cpuSet)) infraOptions.CPUSetCPUs = copy break } else { infraOptions.CPUSetCPUs = copy break } case ind != 0: copy += "," + strconv.Itoa(core) default: copy = "" + strconv.Itoa(core) } } createOptions.Cpus = infraOptions.CPUS createOptions.CpusetCpus = infraOptions.CPUSetCPUs podSpec := specgen.NewPodSpecGenerator() podSpec, err = entities.ToPodSpecGen(*podSpec, &createOptions) if err != nil { return err } if createOptions.Infra { rawImageName = img podSpec.InfraImage = imageName if infraOptions.Entrypoint != nil { createOptions.InfraCommand = infraOptions.Entrypoint } podSpec.InfraContainerSpec = specgen.NewSpecGenerator(imageName, false) podSpec.InfraContainerSpec.RawImageName = rawImageName podSpec.InfraContainerSpec.NetworkOptions = podSpec.NetworkOptions err = specgenutil.FillOutSpecGen(podSpec.InfraContainerSpec, &infraOptions, []string{}) if err != nil { return err } podSpec.Volumes = podSpec.InfraContainerSpec.Volumes podSpec.ImageVolumes = podSpec.InfraContainerSpec.ImageVolumes podSpec.OverlayVolumes = podSpec.InfraContainerSpec.OverlayVolumes podSpec.Mounts = podSpec.InfraContainerSpec.Mounts // Marshall and Unmarshal the spec in order to map similar entities wrapped, err := json.Marshal(podSpec.InfraContainerSpec) if err != nil { return err } err = json.Unmarshal(wrapped, podSpec) if err != nil { return err } podSpec.Name = podName } PodSpec := entities.PodSpec{PodSpecGen: *podSpec} response, err := registry.ContainerEngine().PodCreate(context.Background(), PodSpec) if err != nil { return err } if len(podIDFile) > 0 { if err = ioutil.WriteFile(podIDFile, []byte(response.Id), 0644); err != nil { return fmt.Errorf("failed to write pod ID to file: %w", err) } } 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) }