package pods import ( "context" "fmt" "io/ioutil" "os" "runtime" "sort" "strconv" "strings" "github.com/containers/common/pkg/completion" "github.com/containers/common/pkg/config" "github.com/containers/common/pkg/sysinfo" "github.com/containers/podman/v3/cmd/podman/common" "github.com/containers/podman/v3/cmd/podman/containers" "github.com/containers/podman/v3/cmd/podman/parse" "github.com/containers/podman/v3/cmd/podman/registry" "github.com/containers/podman/v3/cmd/podman/validate" "github.com/containers/podman/v3/pkg/domain/entities" "github.com/containers/podman/v3/pkg/errorhandling" "github.com/containers/podman/v3/pkg/specgen" "github.com/containers/podman/v3/pkg/specgenutil" "github.com/containers/podman/v3/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.ContainerCreateOptions labels, labelFile []string podIDFile string replace bool share string ) func init() { registry.Commands = append(registry.Commands, registry.CliCommand{ Command: createCommand, Parent: podCmd, }) flags := createCommand.Flags() flags.SetInterspersed(false) infraOptions.IsInfra = true common.DefineCreateFlags(createCommand, &infraOptions, true) 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" flags.String(infraImageFlagName, containerConfig.Engine.InfraImage, "The image of the infra container to associate with the pod") _ = 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) 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 ) labelFile = infraOptions.LabelFile labels = infraOptions.Label createOptions.Labels, err = parse.GetAllLabels(labelFile, labels) if err != nil { return errors.Wrapf(err, "unable to process labels") } imageName = config.DefaultInfraImage 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, false) 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 optios for lbpod api, these need to be populated in spec MapOptions() flags := cmd.Flags() infraOptions.Net, err = common.NetFlagsToNetOptions(nil, *flags, false) if err != nil { return err } infraOptions, err = containers.CreateInit(cmd, infraOptions, true) if err != nil { return err } createOptions.Net = infraOptions.Net createOptions.Share = strings.Split(share, ",") 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 createOptions.InfraCommand = cmdIn if err != nil { return err } } if cmd.Flag("infra-image").Changed { // Only send content to server side if user changed defaults img, err = cmd.Flags().GetString("infra-image") imageName = img 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) } 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 := createOptions.CpusetCpus cpuSet := createOptions.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)) createOptions.CpusetCpus = copy break } else { createOptions.CpusetCpus = copy break } } else if ind != 0 { copy += "," + strconv.Itoa(core) } else { copy = "" + strconv.Itoa(core) } } podSpec := specgen.NewPodSpecGenerator() podSpec, err = entities.ToPodSpecGen(*podSpec, &createOptions) if err != nil { return err } if createOptions.Infra { rawImageName = img if !infraOptions.RootFS { curr := infraOptions.Quiet infraOptions.Quiet = true name, err := containers.PullImage(imageName, infraOptions) if err != nil { fmt.Println(err) } imageName = name infraOptions.Quiet = curr } podSpec.InfraImage = imageName if infraOptions.Entrypoint != nil { createOptions.InfraCommand = *infraOptions.Entrypoint } infraOptions.CPUS = createOptions.Cpus infraOptions.CPUSetCPUs = createOptions.CpusetCpus infraOptions.PID = createOptions.Pid 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 } 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) } func MapOptions() { createOptions.Cpus = infraOptions.CPUS createOptions.CpusetCpus = infraOptions.CPUSetCPUs createOptions.Hostname = infraOptions.Hostname createOptions.InfraConmonPidFile = infraOptions.ConmonPIDFile createOptions.InfraName = infraOptions.Name createOptions.Pid = infraOptions.PID createOptions.Volume = infraOptions.Volume }