f57c5cdefb
Allow customization of reference creation. Add option for digest references. Signed-off-by: Derek McGowan <derek@mcgstyle.net>
131 lines
3.2 KiB
Go
131 lines
3.2 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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"fmt"
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"io"
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"os"
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"time"
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"github.com/containerd/containerd"
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"github.com/containerd/containerd/cmd/ctr/commands"
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oci "github.com/containerd/containerd/images/oci"
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"github.com/containerd/containerd/log"
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"github.com/urfave/cli"
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)
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var importCommand = cli.Command{
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Name: "import",
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Usage: "import images",
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ArgsUsage: "[flags] <in>",
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Description: `Import images from a tar stream.
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Implemented formats:
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- oci.v1 (default)
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For oci.v1 format, you need to specify --oci-name because an OCI archive contains image refs (tags)
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but does not contain the base image name.
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e.g.
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$ ctr images import --format oci.v1 --oci-name foo/bar foobar.tar
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If foobar.tar contains an OCI ref named "latest" and anonymous ref "sha256:deadbeef", the command will create
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"foo/bar:latest" and "foo/bar@sha256:deadbeef" images in the containerd store.
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`,
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Flags: append([]cli.Flag{
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cli.StringFlag{
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Name: "format",
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Value: "oci.v1",
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Usage: "image format. See DESCRIPTION.",
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},
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cli.StringFlag{
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Name: "prefix,oci-name",
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Value: "",
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Usage: "prefix image name for added images",
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},
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cli.BoolFlag{
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Name: "digests",
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Usage: "whether to create digest images",
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},
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}, commands.SnapshotterFlags...),
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Action: func(context *cli.Context) error {
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var (
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in = context.Args().First()
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opts []containerd.ImportOpt
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)
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switch format := context.String("format"); format {
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case "oci.v1":
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opts = append(opts, containerd.WithImporter(&oci.V1Importer{}))
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prefix := context.String("prefix")
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if prefix == "" {
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prefix = fmt.Sprintf("import-%s", time.Now().Format("2006-01-02"))
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}
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opts = append(opts, containerd.WithImageRefTranslator(oci.RefTranslator(prefix)))
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if context.Bool("digests") {
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opts = append(opts, containerd.WithDigestRef(oci.DigestTranslator(prefix)))
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}
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default:
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return fmt.Errorf("unknown format %s", format)
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}
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client, ctx, cancel, err := commands.NewClient(context)
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if err != nil {
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return err
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}
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defer cancel()
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var r io.ReadCloser
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if in == "-" {
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r = os.Stdin
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} else {
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r, err = os.Open(in)
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if err != nil {
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return err
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}
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}
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imgs, err := client.Import(ctx, r, opts...)
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closeErr := r.Close()
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if err != nil {
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return err
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}
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if closeErr != nil {
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return closeErr
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}
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log.G(ctx).Debugf("unpacking %d images", len(imgs))
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for _, img := range imgs {
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// TODO: Allow configuration of the platform
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image := containerd.NewImage(client, img)
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// TODO: Show unpack status
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fmt.Printf("unpacking %s (%s)...", img.Name, img.Target.Digest)
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err = image.Unpack(ctx, context.String("snapshotter"))
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if err != nil {
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return err
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}
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fmt.Println("done")
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}
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return nil
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},
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}
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