mirror of
https://github.com/k3s-io/kubernetes.git
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123 lines
3.1 KiB
Go
123 lines
3.1 KiB
Go
/*
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Copyright 2016 The Kubernetes 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 rktshim
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import (
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"errors"
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"fmt"
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"strconv"
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"strings"
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"time"
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runtimeApi "k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
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"k8s.io/kubernetes/pkg/kubelet/container"
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)
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// TODO(tmrts): Move these errors to the container API for code re-use.
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var (
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ErrImageNotFound = errors.New("rktshim: image not found")
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)
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// var _ kubeletApi.ImageManagerService = (*ImageStore)(nil)
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// ImageStore supports CRUD operations for images.
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type ImageStore struct {
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rkt CLI
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requestTimeout time.Duration
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}
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// TODO(tmrts): fill the image store configuration fields.
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type ImageStoreConfig struct {
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CLI CLI
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RequestTimeout time.Duration
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}
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// NewImageStore creates an image storage that allows CRUD operations for images.
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func NewImageStore(cfg ImageStoreConfig) (*ImageStore, error) {
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return &ImageStore{rkt: cfg.CLI, requestTimeout: cfg.RequestTimeout}, nil
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}
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// List lists the images residing in the image store.
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func (s *ImageStore) List() ([]container.Image, error) {
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list, err := s.rkt.RunCommand("image", "list",
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"--no-legend",
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"--fields=id,name,size",
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"--sort=importtime",
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)
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if err != nil {
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return nil, fmt.Errorf("couldn't list images: %v", err)
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}
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images := make([]container.Image, len(list))
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for i, image := range list {
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tokens := strings.Fields(image)
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id, name := tokens[0], tokens[1]
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size, err := strconv.ParseInt(tokens[2], 10, 0)
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if err != nil {
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return nil, fmt.Errorf("invalid image size format: %v", err)
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}
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images[i] = container.Image{
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ID: id,
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RepoTags: []string{name},
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Size: size,
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}
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}
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return images, nil
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}
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// Pull pulls an image into the image store and uses the given authentication method.
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func (s *ImageStore) Pull(container.ImageSpec, runtimeApi.AuthConfig, *runtimeApi.PodSandboxConfig) error {
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panic("not implemented yet!")
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}
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// Remove removes the image from the image store.
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func (s *ImageStore) Remove(imgSpec container.ImageSpec) error {
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img, err := s.Status(imgSpec)
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if err != nil {
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return err
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}
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if _, err := s.rkt.RunCommand("image", "rm", img.ID); err != nil {
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return fmt.Errorf("failed to remove the image: %v", err)
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}
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return nil
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}
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// Status returns the status of the image.
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func (s *ImageStore) Status(spec container.ImageSpec) (container.Image, error) {
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images, err := s.List()
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if err != nil {
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return container.Image{}, err
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}
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for _, img := range images {
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for _, tag := range img.RepoTags {
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if tag == spec.Image {
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return img, nil
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}
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}
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}
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return container.Image{}, fmt.Errorf("couldn't to find the image %v", spec.Image)
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}
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