b518f11dba
Export as a tar (Note: "-" can be used for stdout):
$ ctr images export /tmp/oci-busybox.tar docker.io/library/busybox:latest
Import a tar (Note: "-" can be used for stdin):
$ ctr images import foo/new:latest /tmp/oci-busybox.tar
Note: media types are not converted at the moment: e.g.
application/vnd.docker.image.rootfs.diff.tar.gzip
-> application/vnd.oci.image.layer.v1.tar+gzip
Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>
71 lines
1.3 KiB
Go
71 lines
1.3 KiB
Go
package main
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import (
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"fmt"
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"io"
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"os"
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"github.com/containerd/containerd"
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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 imagesImportCommand = cli.Command{
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Name: "import",
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Usage: "import an image",
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ArgsUsage: "[flags] <ref> <in>",
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Description: `Import an image from a tar stream
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`,
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Flags: []cli.Flag{
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cli.StringFlag{
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Name: "ref-object",
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Value: "",
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Usage: "reference object e.g. tag@digest (default: use the object specified in ref)",
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},
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},
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Action: func(clicontext *cli.Context) error {
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var (
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ref = clicontext.Args().First()
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in = clicontext.Args().Get(1)
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refObject = clicontext.String("ref-object")
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)
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ctx, cancel := appContext(clicontext)
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defer cancel()
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client, err := newClient(clicontext)
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if err != nil {
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return err
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}
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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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img, err := client.Import(ctx,
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ref,
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r,
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containerd.WithRefObject(refObject),
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)
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if err != nil {
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return err
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}
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if err = r.Close(); err != nil {
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return err
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}
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log.G(ctx).WithField("image", ref).Debug("unpacking")
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// TODO: Show unpack status
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fmt.Printf("unpacking %s...", img.Target().Digest)
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err = img.Unpack(ctx, clicontext.String("snapshotter"))
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fmt.Println("done")
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return err
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},
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}
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