133 lines
4.1 KiB
Go
133 lines
4.1 KiB
Go
/*
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Copyright The containerd Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package images
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import (
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"context"
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"encoding/json"
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"fmt"
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"strconv"
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"strings"
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imagestore "github.com/containerd/containerd/v2/internal/cri/store/image"
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"github.com/containerd/containerd/v2/internal/cri/util"
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"github.com/containerd/containerd/v2/pkg/tracing"
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"github.com/containerd/errdefs"
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"github.com/containerd/log"
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imagespec "github.com/opencontainers/image-spec/specs-go/v1"
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runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
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)
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// ImageStatus returns the status of the image, returns nil if the image isn't present.
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// TODO(random-liu): We should change CRI to distinguish image id and image spec. (See
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// kubernetes/kubernetes#46255)
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func (c *CRIImageService) ImageStatus(ctx context.Context, r *runtime.ImageStatusRequest) (*runtime.ImageStatusResponse, error) {
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span := tracing.SpanFromContext(ctx)
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image, err := c.LocalResolve(r.GetImage().GetImage())
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if err != nil {
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if errdefs.IsNotFound(err) {
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span.AddEvent(err.Error())
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// return empty without error when image not found.
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return &runtime.ImageStatusResponse{}, nil
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}
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return nil, fmt.Errorf("can not resolve %q locally: %w", r.GetImage().GetImage(), err)
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}
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span.SetAttributes(tracing.Attribute("image.id", image.ID))
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// TODO(random-liu): [P0] Make sure corresponding snapshot exists. What if snapshot
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// doesn't exist?
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runtimeImage := toCRIImage(image)
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info, err := c.toCRIImageInfo(ctx, &image, r.GetVerbose())
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if err != nil {
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return nil, fmt.Errorf("failed to generate image info: %w", err)
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}
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return &runtime.ImageStatusResponse{
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Image: runtimeImage,
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Info: info,
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}, nil
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}
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// toCRIImage converts internal image object to CRI runtime.Image.
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func toCRIImage(image imagestore.Image) *runtime.Image {
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repoTags, repoDigests := util.ParseImageReferences(image.References)
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runtimeImage := &runtime.Image{
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Id: image.ID,
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RepoTags: repoTags,
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RepoDigests: repoDigests,
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Size_: uint64(image.Size),
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Pinned: image.Pinned,
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}
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uid, username := getUserFromImage(image.ImageSpec.Config.User)
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if uid != nil {
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runtimeImage.Uid = &runtime.Int64Value{Value: *uid}
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}
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runtimeImage.Username = username
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return runtimeImage
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}
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// getUserFromImage gets uid or user name of the image user.
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// If user is numeric, it will be treated as uid; or else, it is treated as user name.
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func getUserFromImage(user string) (*int64, string) {
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// return both empty if user is not specified in the image.
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if user == "" {
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return nil, ""
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}
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// split instances where the id may contain user:group
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user = strings.Split(user, ":")[0]
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// user could be either uid or user name. Try to interpret as numeric uid.
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uid, err := strconv.ParseInt(user, 10, 64)
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if err != nil {
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// If user is non numeric, assume it's user name.
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return nil, user
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}
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// If user is a numeric uid.
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return &uid, ""
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}
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// TODO (mikebrow): discuss moving this struct and / or constants for info map for some or all of these fields to CRI
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type verboseImageInfo struct {
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ChainID string `json:"chainID"`
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ImageSpec imagespec.Image `json:"imageSpec"`
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}
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// toCRIImageInfo converts internal image object information to CRI image status response info map.
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func (c *CRIImageService) toCRIImageInfo(ctx context.Context, image *imagestore.Image, verbose bool) (map[string]string, error) {
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if !verbose {
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return nil, nil
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}
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info := make(map[string]string)
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imi := &verboseImageInfo{
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ChainID: image.ChainID,
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ImageSpec: image.ImageSpec,
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}
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m, err := json.Marshal(imi)
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if err == nil {
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info["info"] = string(m)
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} else {
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log.G(ctx).WithError(err).Errorf("failed to marshal info %v", imi)
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info["info"] = err.Error()
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}
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return info, nil
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}
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