e18e962238
Begin moving image and layer handling out of libkpod into libpod. Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
123 lines
3 KiB
Go
123 lines
3 KiB
Go
package main
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import (
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"fmt"
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"github.com/containers/storage"
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"github.com/kubernetes-incubator/cri-o/libpod/images"
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"github.com/pkg/errors"
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"github.com/urfave/cli"
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)
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var (
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rmiDescription = "removes one or more locally stored images."
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rmiFlags = []cli.Flag{
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cli.BoolFlag{
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Name: "force, f",
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Usage: "force removal of the image",
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},
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}
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rmiCommand = cli.Command{
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Name: "rmi",
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Usage: "removes one or more images from local storage",
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Description: rmiDescription,
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Action: rmiCmd,
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ArgsUsage: "IMAGE-NAME-OR-ID [...]",
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Flags: rmiFlags,
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}
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)
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func rmiCmd(c *cli.Context) error {
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force := false
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if c.IsSet("force") {
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force = c.Bool("force")
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}
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args := c.Args()
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if len(args) == 0 {
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return errors.Errorf("image name or ID must be specified")
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}
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config, err := getConfig(c)
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if err != nil {
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return errors.Wrapf(err, "Could not get config")
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}
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store, err := getStore(config)
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if err != nil {
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return err
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}
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for _, id := range args {
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image, err := images.FindImage(store, id)
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if err != nil {
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return errors.Wrapf(err, "could not get image %q", id)
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}
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if image != nil {
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ctrIDs, err := runningContainers(image, store)
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if err != nil {
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return errors.Wrapf(err, "error getting running containers for image %q", id)
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}
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if len(ctrIDs) > 0 && len(image.Names) <= 1 {
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if force {
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removeContainers(ctrIDs, store)
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} else {
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for ctrID := range ctrIDs {
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return fmt.Errorf("Could not remove image %q (must force) - container %q is using its reference image", id, ctrID)
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}
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}
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}
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// If the user supplied an ID, we cannot delete the image if it is referred to by multiple tags
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if images.MatchesID(image.ID, id) {
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if len(image.Names) > 1 && !force {
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return fmt.Errorf("unable to delete %s (must force) - image is referred to in multiple tags", image.ID)
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}
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// If it is forced, we have to untag the image so that it can be deleted
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image.Names = image.Names[:0]
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} else {
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name, err2 := images.UntagImage(store, image, id)
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if err2 != nil {
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return err
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}
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fmt.Printf("untagged: %s", name)
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}
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if len(image.Names) > 0 {
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continue
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}
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id, err := images.RemoveImage(image, store)
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if err != nil {
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return err
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}
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fmt.Printf("%s\n", id)
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}
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}
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return nil
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}
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// Returns a list of running containers associated with the given ImageReference
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// TODO: replace this with something in libkpod
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func runningContainers(image *storage.Image, store storage.Store) ([]string, error) {
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ctrIDs := []string{}
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containers, err := store.Containers()
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if err != nil {
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return nil, err
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}
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for _, ctr := range containers {
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if ctr.ImageID == image.ID {
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ctrIDs = append(ctrIDs, ctr.ID)
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}
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}
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return ctrIDs, nil
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}
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// TODO: replace this with something in libkpod
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func removeContainers(ctrIDs []string, store storage.Store) error {
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for _, ctrID := range ctrIDs {
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if err := store.DeleteContainer(ctrID); err != nil {
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return errors.Wrapf(err, "could not remove container %q", ctrID)
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}
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}
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return nil
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}
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