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68 lines
2.0 KiB
Go
68 lines
2.0 KiB
Go
package client
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import (
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"context"
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"github.com/containerd/containerd/content/local"
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"github.com/containerd/containerd/images"
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ctdmetadata "github.com/containerd/containerd/metadata"
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"github.com/containerd/containerd/platforms"
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bolt "go.etcd.io/bbolt"
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)
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// ListedImage represents an image structure returuned from ListImages.
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// It extends containerd/images.Image with extra fields.
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type ListedImage struct {
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images.Image
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ContentSize int64
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}
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// ListImages returns the images from the image store.
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func (c *Client) ListImages(ctx context.Context, filters ...string) ([]ListedImage, error) {
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dbPath := filepath.Join(c.root, "containerdmeta.db")
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if _, err := os.Stat(dbPath); os.IsNotExist(err) {
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// The metadata database does not exist so we should just return as if there
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// were no results.
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return nil, nil
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}
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// Open the bolt database for metadata.
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// Since we are only listing we can open it as read-only.
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db, err := bolt.Open(dbPath, 0644, &bolt.Options{ReadOnly: true})
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if err != nil {
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return nil, fmt.Errorf("opening boltdb failed: %v", err)
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}
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// Create the content store locally.
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contentStore, err := local.NewStore(filepath.Join(c.root, "content"))
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if err != nil {
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return nil, fmt.Errorf("creating content store failed: %v", err)
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}
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// Create the database for metadata.
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mdb := ctdmetadata.NewDB(db, contentStore, nil)
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// Create the image store.
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imageStore := ctdmetadata.NewImageStore(mdb)
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// List the images in the image store.
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i, err := imageStore.List(ctx, filters...)
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if err != nil {
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return nil, fmt.Errorf("listing images with filters (%s) failed: %v", strings.Join(filters, ", "), err)
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}
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listedImages := []ListedImage{}
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for _, image := range i {
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size, err := image.Size(ctx, contentStore, platforms.Default())
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if err != nil {
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return nil, fmt.Errorf("calculating size of image %s failed: %v", image.Name, err)
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}
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listedImages = append(listedImages, ListedImage{Image: image, ContentSize: size})
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}
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return listedImages, nil
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}
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