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|
package pods
import (
"context"
"fmt"
"io/ioutil"
"os"
"strings"
"github.com/containers/common/pkg/completion"
"github.com/containers/podman/v3/cmd/podman/common"
"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/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 <pod_id> 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
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)
common.DefineNetFlags(createCommand)
cgroupParentflagName := "cgroup-parent"
flags.StringVar(&createOptions.CGroupParent, cgroupParentflagName, "", "Set parent cgroup for the pod")
_ = createCommand.RegisterFlagCompletionFunc(cgroupParentflagName, completion.AutocompleteDefault)
flags.BoolVar(&createOptions.Infra, "infra", true, "Create an infra container associated with the pod to share namespaces with")
infraConmonPidfileFlagName := "infra-conmon-pidfile"
flags.StringVar(&createOptions.InfraConmonPidFile, infraConmonPidfileFlagName, "", "Path to the file that will receive the POD of the infra container's conmon")
_ = createCommand.RegisterFlagCompletionFunc(infraConmonPidfileFlagName, completion.AutocompleteDefault)
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)
infraCommandFlagName := "infra-command"
flags.String(infraCommandFlagName, containerConfig.Engine.InfraCommand, "The command to run on the infra container when the pod is started")
_ = createCommand.RegisterFlagCompletionFunc(infraCommandFlagName, completion.AutocompleteNone)
labelFileFlagName := "label-file"
flags.StringSliceVar(&labelFile, labelFileFlagName, []string{}, "Read in a line delimited file of labels")
_ = createCommand.RegisterFlagCompletionFunc(labelFileFlagName, completion.AutocompleteDefault)
labelFlagName := "label"
flags.StringSliceVarP(&labels, labelFlagName, "l", []string{}, "Set metadata on pod (default [])")
_ = createCommand.RegisterFlagCompletionFunc(labelFlagName, completion.AutocompleteNone)
nameFlagName := "name"
flags.StringVarP(&createOptions.Name, nameFlagName, "n", "", "Assign a name to the pod")
_ = createCommand.RegisterFlagCompletionFunc(nameFlagName, completion.AutocompleteNone)
hostnameFlagName := "hostname"
flags.StringVarP(&createOptions.Hostname, hostnameFlagName, "", "", "Set a hostname to the pod")
_ = createCommand.RegisterFlagCompletionFunc(hostnameFlagName, completion.AutocompleteNone)
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
)
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, createOptions.Infra)
if err != nil {
return err
}
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")
}
}
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)
}
|
