mirror of https://github.com/k3s-io/k3s
176 lines
5.5 KiB
Go
176 lines
5.5 KiB
Go
/*
|
|
Copyright 2016 The Kubernetes Authors.
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
package dockershim
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"net/http"
|
|
|
|
dockertypes "github.com/docker/docker/api/types"
|
|
dockerfilters "github.com/docker/docker/api/types/filters"
|
|
"github.com/docker/docker/pkg/jsonmessage"
|
|
|
|
"k8s.io/klog"
|
|
runtimeapi "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
|
|
"k8s.io/kubernetes/pkg/kubelet/dockershim/libdocker"
|
|
)
|
|
|
|
// This file implements methods in ImageManagerService.
|
|
|
|
// ListImages lists existing images.
|
|
func (ds *dockerService) ListImages(_ context.Context, r *runtimeapi.ListImagesRequest) (*runtimeapi.ListImagesResponse, error) {
|
|
filter := r.GetFilter()
|
|
opts := dockertypes.ImageListOptions{}
|
|
if filter != nil {
|
|
if filter.GetImage().GetImage() != "" {
|
|
opts.Filters = dockerfilters.NewArgs()
|
|
opts.Filters.Add("reference", filter.GetImage().GetImage())
|
|
}
|
|
}
|
|
|
|
images, err := ds.client.ListImages(opts)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
result := make([]*runtimeapi.Image, 0, len(images))
|
|
for _, i := range images {
|
|
apiImage, err := imageToRuntimeAPIImage(&i)
|
|
if err != nil {
|
|
klog.V(5).Infof("Failed to convert docker API image %+v to runtime API image: %v", i, err)
|
|
continue
|
|
}
|
|
result = append(result, apiImage)
|
|
}
|
|
return &runtimeapi.ListImagesResponse{Images: result}, nil
|
|
}
|
|
|
|
// ImageStatus returns the status of the image, returns nil if the image doesn't present.
|
|
func (ds *dockerService) ImageStatus(_ context.Context, r *runtimeapi.ImageStatusRequest) (*runtimeapi.ImageStatusResponse, error) {
|
|
image := r.GetImage()
|
|
|
|
imageInspect, err := ds.client.InspectImageByRef(image.Image)
|
|
if err != nil {
|
|
if libdocker.IsImageNotFoundError(err) {
|
|
return &runtimeapi.ImageStatusResponse{}, nil
|
|
}
|
|
return nil, err
|
|
}
|
|
|
|
imageStatus, err := imageInspectToRuntimeAPIImage(imageInspect)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
res := runtimeapi.ImageStatusResponse{Image: imageStatus}
|
|
if r.GetVerbose() {
|
|
res.Info = imageInspect.Config.Labels
|
|
}
|
|
return &res, nil
|
|
}
|
|
|
|
// PullImage pulls an image with authentication config.
|
|
func (ds *dockerService) PullImage(_ context.Context, r *runtimeapi.PullImageRequest) (*runtimeapi.PullImageResponse, error) {
|
|
image := r.GetImage()
|
|
auth := r.GetAuth()
|
|
authConfig := dockertypes.AuthConfig{}
|
|
|
|
if auth != nil {
|
|
authConfig.Username = auth.Username
|
|
authConfig.Password = auth.Password
|
|
authConfig.ServerAddress = auth.ServerAddress
|
|
authConfig.IdentityToken = auth.IdentityToken
|
|
authConfig.RegistryToken = auth.RegistryToken
|
|
}
|
|
err := ds.client.PullImage(image.Image,
|
|
authConfig,
|
|
dockertypes.ImagePullOptions{},
|
|
)
|
|
if err != nil {
|
|
return nil, filterHTTPError(err, image.Image)
|
|
}
|
|
|
|
imageRef, err := getImageRef(ds.client, image.Image)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return &runtimeapi.PullImageResponse{ImageRef: imageRef}, nil
|
|
}
|
|
|
|
// RemoveImage removes the image.
|
|
func (ds *dockerService) RemoveImage(_ context.Context, r *runtimeapi.RemoveImageRequest) (*runtimeapi.RemoveImageResponse, error) {
|
|
image := r.GetImage()
|
|
// If the image has multiple tags, we need to remove all the tags
|
|
// 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
|
|
}
|
|
return &runtimeapi.RemoveImageResponse{}, nil
|
|
}
|
|
|
|
// getImageRef returns the image digest if exists, or else returns the image ID.
|
|
func getImageRef(client libdocker.Interface, image string) (string, error) {
|
|
img, err := client.InspectImageByRef(image)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
if img == nil {
|
|
return "", fmt.Errorf("unable to inspect image %s", image)
|
|
}
|
|
|
|
// Returns the digest if it exist.
|
|
if len(img.RepoDigests) > 0 {
|
|
return img.RepoDigests[0], nil
|
|
}
|
|
|
|
return img.ID, nil
|
|
}
|
|
|
|
func filterHTTPError(err error, image string) error {
|
|
// docker/docker/pull/11314 prints detailed error info for docker pull.
|
|
// When it hits 502, it returns a verbose html output including an inline svg,
|
|
// which makes the output of kubectl get pods much harder to parse.
|
|
// Here converts such verbose output to a concise one.
|
|
jerr, ok := err.(*jsonmessage.JSONError)
|
|
if ok && (jerr.Code == http.StatusBadGateway ||
|
|
jerr.Code == http.StatusServiceUnavailable ||
|
|
jerr.Code == http.StatusGatewayTimeout) {
|
|
return fmt.Errorf("RegistryUnavailable: %v", err)
|
|
}
|
|
return err
|
|
|
|
}
|