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Merge pull request #70647 from vshn/imagegc_multi_repo_image_removal 

Always run untag when removing docker image
pull/564/head
Kubernetes Prow Robot 2019-02-26 11:04:58 -08:00 committed by GitHub
parent ba1164194c 9e8df0f82a
commit cf24d24e66
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 91 additions and 53 deletions
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25
pkg/kubelet/dockershim/docker_image.go
View File

@ -120,24 +120,27 @@ func (ds *dockerService) RemoveImage(_ context.Context, r *runtimeapi.RemoveImag
// TODO: We assume image.Image is image ID here, which is true in the current implementation
// of kubelet, but we should still clarify this in CRI.
imageInspect, err := ds.client.InspectImageByID(image.Image)
if err == nil && imageInspect != nil && len(imageInspect.RepoTags) > 1 {
for _, tag := range imageInspect.RepoTags {
if _, err := ds.client.RemoveImage(tag, dockertypes.ImageRemoveOptions{PruneChildren: true}); err != nil && !libdocker.IsImageNotFoundError(err) {
return nil, err
}
}
return &runtimeapi.RemoveImageResponse{}, nil
}
// dockerclient.InspectImageByID doesn't work with digest and repoTags,
// it is safe to continue removing it since there is another check below.
if err != nil && !libdocker.IsImageNotFoundError(err) {
return nil, err
}
_, err = ds.client.RemoveImage(image.Image, dockertypes.ImageRemoveOptions{PruneChildren: true})
if err != nil && !libdocker.IsImageNotFoundError(err) {
return nil, err
// An image can have different numbers of RepoTags and RepoDigests.
// Iterating over both of them plus the image ID ensures the image really got removed.
// It also prevents images from being deleted, which actually are deletable using this approach.
var images []string
images = append(images, imageInspect.RepoTags...)
images = append(images, imageInspect.RepoDigests...)
images = append(images, image.Image)
for _, image := range images {
if _, err := ds.client.RemoveImage(image, dockertypes.ImageRemoveOptions{PruneChildren: true}); err != nil && !libdocker.IsImageNotFoundError(err) {
return nil, err
}
}
return &runtimeapi.RemoveImageResponse{}, nil
}

65
pkg/kubelet/dockershim/docker_image_test.go
View File

@ -30,22 +30,57 @@ import (
)
func TestRemoveImage(t *testing.T) {
ds, fakeDocker, _ := newTestDockerService()
id := "1111"
fakeDocker.InjectImageInspects([]dockertypes.ImageInspect{{ID: id, RepoTags: []string{"foo"}}})
ds.RemoveImage(getTestCTX(), &runtimeapi.RemoveImageRequest{Image: &runtimeapi.ImageSpec{Image: id}})
fakeDocker.AssertCallDetails(libdocker.NewCalledDetail("inspect_image", nil),
libdocker.NewCalledDetail("remove_image", []interface{}{id, dockertypes.ImageRemoveOptions{PruneChildren: true}}))
}
tests := map[string]struct {
image dockertypes.ImageInspect
calledDetails []libdocker.CalledDetail
}{
"single tag": {
dockertypes.ImageInspect{ID: "1111", RepoTags: []string{"foo"}},
[]libdocker.CalledDetail{
libdocker.NewCalledDetail("inspect_image", nil),
libdocker.NewCalledDetail("remove_image", []interface{}{"foo", dockertypes.ImageRemoveOptions{PruneChildren: true}}),
libdocker.NewCalledDetail("remove_image", []interface{}{"1111", dockertypes.ImageRemoveOptions{PruneChildren: true}}),
},
},
"multiple tags": {
dockertypes.ImageInspect{ID: "2222", RepoTags: []string{"foo", "bar"}},
[]libdocker.CalledDetail{
libdocker.NewCalledDetail("inspect_image", nil),
libdocker.NewCalledDetail("remove_image", []interface{}{"foo", dockertypes.ImageRemoveOptions{PruneChildren: true}}),
libdocker.NewCalledDetail("remove_image", []interface{}{"bar", dockertypes.ImageRemoveOptions{PruneChildren: true}}),
libdocker.NewCalledDetail("remove_image", []interface{}{"2222", dockertypes.ImageRemoveOptions{PruneChildren: true}}),
},
},
"single tag multiple repo digests": {
dockertypes.ImageInspect{ID: "3333", RepoTags: []string{"foo"}, RepoDigests: []string{"foo@3333", "example.com/foo@3333"}},
[]libdocker.CalledDetail{
libdocker.NewCalledDetail("inspect_image", nil),
libdocker.NewCalledDetail("remove_image", []interface{}{"foo", dockertypes.ImageRemoveOptions{PruneChildren: true}}),
libdocker.NewCalledDetail("remove_image", []interface{}{"foo@3333", dockertypes.ImageRemoveOptions{PruneChildren: true}}),
libdocker.NewCalledDetail("remove_image", []interface{}{"example.com/foo@3333", dockertypes.ImageRemoveOptions{PruneChildren: true}}),
libdocker.NewCalledDetail("remove_image", []interface{}{"3333", dockertypes.ImageRemoveOptions{PruneChildren: true}}),
},
},
"no tags multiple repo digests": {
dockertypes.ImageInspect{ID: "4444", RepoTags: []string{}, RepoDigests: []string{"foo@4444", "example.com/foo@4444"}},
[]libdocker.CalledDetail{
libdocker.NewCalledDetail("inspect_image", nil),
libdocker.NewCalledDetail("remove_image", []interface{}{"foo@4444", dockertypes.ImageRemoveOptions{PruneChildren: true}}),
libdocker.NewCalledDetail("remove_image", []interface{}{"example.com/foo@4444", dockertypes.ImageRemoveOptions{PruneChildren: true}}),
libdocker.NewCalledDetail("remove_image", []interface{}{"4444", dockertypes.ImageRemoveOptions{PruneChildren: true}}),
},
},
}
func TestRemoveImageWithMultipleTags(t *testing.T) {
ds, fakeDocker, _ := newTestDockerService()
id := "1111"
fakeDocker.InjectImageInspects([]dockertypes.ImageInspect{{ID: id, RepoTags: []string{"foo", "bar"}}})
ds.RemoveImage(getTestCTX(), &runtimeapi.RemoveImageRequest{Image: &runtimeapi.ImageSpec{Image: id}})
fakeDocker.AssertCallDetails(libdocker.NewCalledDetail("inspect_image", nil),
libdocker.NewCalledDetail("remove_image", []interface{}{"foo", dockertypes.ImageRemoveOptions{PruneChildren: true}}),
libdocker.NewCalledDetail("remove_image", []interface{}{"bar", dockertypes.ImageRemoveOptions{PruneChildren: true}}))
for name, test := range tests {
t.Run(name, func(t *testing.T) {
ds, fakeDocker, _ := newTestDockerService()
fakeDocker.InjectImageInspects([]dockertypes.ImageInspect{test.image})
ds.RemoveImage(getTestCTX(), &runtimeapi.RemoveImageRequest{Image: &runtimeapi.ImageSpec{Image: test.image.ID}})
err := fakeDocker.AssertCallDetails(test.calledDetails...)
assert.NoError(t, err)
})
}
}
func TestPullWithJSONError(t *testing.T) {

54
pkg/kubelet/dockershim/libdocker/fake_client.go
View File

@ -37,14 +37,14 @@ import (
"k8s.io/apimachinery/pkg/util/clock"
)
type calledDetail struct {
type CalledDetail struct {
name string
arguments []interface{}
}
// NewCalledDetail create a new call detail item.
func NewCalledDetail(name string, arguments []interface{}) calledDetail {
return calledDetail{name: name, arguments: arguments}
func NewCalledDetail(name string, arguments []interface{}) CalledDetail {
return CalledDetail{name: name, arguments: arguments}
}
// FakeDockerClient is a simple fake docker client, so that kubelet can be run for testing without requiring a real docker setup.
@ -58,7 +58,7 @@ type FakeDockerClient struct {
Images []dockertypes.ImageSummary
ImageIDsNeedingAuth map[string]dockertypes.AuthConfig
Errors map[string]error
called []calledDetail
called []CalledDetail
pulled []string
EnableTrace bool
RandGenerator *rand.Rand
@ -132,7 +132,7 @@ func (f *FakeDockerClient) WithRandSource(source rand.Source) *FakeDockerClient
return f
}
func (f *FakeDockerClient) appendCalled(callDetail calledDetail) {
func (f *FakeDockerClient) appendCalled(callDetail CalledDetail) {
if f.EnableTrace {
f.called = append(f.called, callDetail)
}
@ -183,7 +183,7 @@ func (f *FakeDockerClient) ClearErrors() {
func (f *FakeDockerClient) ClearCalls() {
f.Lock()
defer f.Unlock()
f.called = []calledDetail{}
f.called = []CalledDetail{}
f.pulled = []string{}
f.Created = []string{}
f.Started = []string{}
@ -286,7 +286,7 @@ func (f *FakeDockerClient) AssertCalls(calls []string) (err error) {
return
}
func (f *FakeDockerClient) AssertCallDetails(calls ...calledDetail) (err error) {
func (f *FakeDockerClient) AssertCallDetails(calls ...CalledDetail) (err error) {
f.Lock()
defer f.Unlock()
@ -390,7 +390,7 @@ func (f *FakeDockerClient) popError(op string) error {
func (f *FakeDockerClient) ListContainers(options dockertypes.ContainerListOptions) ([]dockertypes.Container, error) {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "list"})
f.appendCalled(CalledDetail{name: "list"})
err := f.popError("list")
containerList := append([]dockertypes.Container{}, f.RunningContainerList...)
if options.All {
@ -470,7 +470,7 @@ func toDockerContainerStatus(state string) string {
func (f *FakeDockerClient) InspectContainer(id string) (*dockertypes.ContainerJSON, error) {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "inspect_container"})
f.appendCalled(CalledDetail{name: "inspect_container"})
err := f.popError("inspect_container")
if container, ok := f.ContainerMap[id]; ok {
return container, err
@ -487,7 +487,7 @@ func (f *FakeDockerClient) InspectContainer(id string) (*dockertypes.ContainerJS
func (f *FakeDockerClient) InspectContainerWithSize(id string) (*dockertypes.ContainerJSON, error) {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "inspect_container_withsize"})
f.appendCalled(CalledDetail{name: "inspect_container_withsize"})
err := f.popError("inspect_container_withsize")
if container, ok := f.ContainerMap[id]; ok {
return container, err
@ -504,7 +504,7 @@ func (f *FakeDockerClient) InspectContainerWithSize(id string) (*dockertypes.Con
func (f *FakeDockerClient) InspectImageByRef(name string) (*dockertypes.ImageInspect, error) {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "inspect_image"})
f.appendCalled(CalledDetail{name: "inspect_image"})
if err := f.popError("inspect_image"); err != nil {
return nil, err
}
@ -519,7 +519,7 @@ func (f *FakeDockerClient) InspectImageByRef(name string) (*dockertypes.ImageIns
func (f *FakeDockerClient) InspectImageByID(name string) (*dockertypes.ImageInspect, error) {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "inspect_image"})
f.appendCalled(CalledDetail{name: "inspect_image"})
if err := f.popError("inspect_image"); err != nil {
return nil, err
}
@ -555,7 +555,7 @@ func GetFakeContainerID(name string) string {
func (f *FakeDockerClient) CreateContainer(c dockertypes.ContainerCreateConfig) (*dockercontainer.ContainerCreateCreatedBody, error) {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "create"})
f.appendCalled(CalledDetail{name: "create"})
if err := f.popError("create"); err != nil {
return nil, err
}
@ -581,7 +581,7 @@ func (f *FakeDockerClient) CreateContainer(c dockertypes.ContainerCreateConfig)
func (f *FakeDockerClient) StartContainer(id string) error {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "start"})
f.appendCalled(CalledDetail{name: "start"})
if err := f.popError("start"); err != nil {
return err
}
@ -619,7 +619,7 @@ func (f *FakeDockerClient) StartContainer(id string) error {
func (f *FakeDockerClient) StopContainer(id string, timeout time.Duration) error {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "stop"})
f.appendCalled(CalledDetail{name: "stop"})
if err := f.popError("stop"); err != nil {
return err
}
@ -657,7 +657,7 @@ func (f *FakeDockerClient) StopContainer(id string, timeout time.Duration) error
func (f *FakeDockerClient) RemoveContainer(id string, opts dockertypes.ContainerRemoveOptions) error {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "remove"})
f.appendCalled(CalledDetail{name: "remove"})
err := f.popError("remove")
if err != nil {
return err
@ -693,7 +693,7 @@ func (f *FakeDockerClient) UpdateContainerResources(id string, updateConfig dock
func (f *FakeDockerClient) Logs(id string, opts dockertypes.ContainerLogsOptions, sopts StreamOptions) error {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "logs"})
f.appendCalled(CalledDetail{name: "logs"})
return f.popError("logs")
}
@ -710,7 +710,7 @@ func (f *FakeDockerClient) isAuthorizedForImage(image string, auth dockertypes.A
func (f *FakeDockerClient) PullImage(image string, auth dockertypes.AuthConfig, opts dockertypes.ImagePullOptions) error {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "pull"})
f.appendCalled(CalledDetail{name: "pull"})
err := f.popError("pull")
if err == nil {
if !f.isAuthorizedForImage(image, auth) {
@ -742,21 +742,21 @@ func (f *FakeDockerClient) CreateExec(id string, opts dockertypes.ExecConfig) (*
f.Lock()
defer f.Unlock()
f.execCmd = opts.Cmd
f.appendCalled(calledDetail{name: "create_exec"})
f.appendCalled(CalledDetail{name: "create_exec"})
return &dockertypes.IDResponse{ID: "12345678"}, nil
}
func (f *FakeDockerClient) StartExec(startExec string, opts dockertypes.ExecStartCheck, sopts StreamOptions) error {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "start_exec"})
f.appendCalled(CalledDetail{name: "start_exec"})
return nil
}
func (f *FakeDockerClient) AttachToContainer(id string, opts dockertypes.ContainerAttachOptions, sopts StreamOptions) error {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "attach"})
f.appendCalled(CalledDetail{name: "attach"})
return nil
}
@ -767,7 +767,7 @@ func (f *FakeDockerClient) InspectExec(id string) (*dockertypes.ContainerExecIns
func (f *FakeDockerClient) ListImages(opts dockertypes.ImageListOptions) ([]dockertypes.ImageSummary, error) {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "list_images"})
f.appendCalled(CalledDetail{name: "list_images"})
err := f.popError("list_images")
return f.Images, err
}
@ -775,7 +775,7 @@ func (f *FakeDockerClient) ListImages(opts dockertypes.ImageListOptions) ([]dock
func (f *FakeDockerClient) RemoveImage(image string, opts dockertypes.ImageRemoveOptions) ([]dockertypes.ImageDeleteResponseItem, error) {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "remove_image", arguments: []interface{}{image, opts}})
f.appendCalled(CalledDetail{name: "remove_image", arguments: []interface{}{image, opts}})
err := f.popError("remove_image")
if err == nil {
for i := range f.Images {
@ -833,14 +833,14 @@ func (f *FakeDockerClient) updateContainerStatus(id, status string) {
func (f *FakeDockerClient) ResizeExecTTY(id string, height, width uint) error {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "resize_exec"})
f.appendCalled(CalledDetail{name: "resize_exec"})
return nil
}
func (f *FakeDockerClient) ResizeContainerTTY(id string, height, width uint) error {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "resize_container"})
f.appendCalled(CalledDetail{name: "resize_container"})
return nil
}
@ -884,7 +884,7 @@ func dockerTimestampToString(t time.Time) string {
func (f *FakeDockerClient) ImageHistory(id string) ([]dockerimagetypes.HistoryResponseItem, error) {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "image_history"})
f.appendCalled(CalledDetail{name: "image_history"})
history := f.ImageHistoryMap[id]
return history, nil
}
@ -916,6 +916,6 @@ func (f *FakeDockerPuller) GetImageRef(image string) (string, error) {
func (f *FakeDockerClient) GetContainerStats(id string) (*dockertypes.StatsJSON, error) {
f.Lock()
defer f.Unlock()
f.appendCalled(calledDetail{name: "getContainerStats"})
f.appendCalled(CalledDetail{name: "getContainerStats"})
return nil, fmt.Errorf("not implemented")
}