package pods import ( "context" "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/cmd/podman/validate" "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/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 [options]", Args: validate.NoArgs, Short: "Create a new empty pod", Long: podCreateDescription, RunE: create, ValidArgsFunction: completion.AutocompleteNone, } ) 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.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) 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 ) labelFile = infraOptions.LabelFile labels = infraOptions.Label createOptions.Labels, err = parse.GetAllLabels(labelFile, labels) if err != nil { return errors.Wrapf(err, "unable to process labels") } 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 errors.Wrapf(define.ErrInvalidArg, "cannot define the pod as the cgroup parent at the same time as joining the infra container's cgroupNS") } 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 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) } 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 } } 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 { errors.Wrapf(err, "could not parse list") } var vals []int for ind, val := range ret { if val { vals = append(vals, ind) } } sort.Ints(vals) for ind, core := range vals { if core > int(cpuSet) { if copy == "" { copy = "0-" + strconv.Itoa(int(cpuSet)) infraOptions.CPUSetCPUs = copy break } else { infraOptions.CPUSetCPUs = copy break } } else if ind != 0 { copy += "," + strconv.Itoa(core) } else { 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 errors.Wrapf(err, "failed to write pod ID to file") } } 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) }