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ctr: unpack the image on run if necessary

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Without this `ctr run` can fail with:

    ctr: parent snapshot sha256:70798fd80095f40b41baa5d107fb61532bfe494d96313fea01e8fcbf4e8743ee does not exist: not found

My image was produced by buildkit, which doesn't unpack (I think this makes
sense since buildkit doesn't know if I am going to run the image or export/push
it etc).

Signed-off-by: Ian Campbell <ian.campbell@docker.com>
This commit is contained in:
Ian Campbell 2018-02-26 14:19:22 +00:00
parent 5bd99af7db
commit f48cc7d7fe
1 changed files with 11 additions and 1 deletions
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12
cmd/ctr/commands/run/run_unix.go
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@ -68,14 +68,24 @@ func NewContainer(ctx gocontext.Context, client *containerd.Client, context *cli
if context.Bool("rootfs") {
opts = append(opts, oci.WithRootFSPath(ref))
} else {
snapshotter := context.String("snapshotter")
image, err := client.GetImage(ctx, ref)
if err != nil {
return nil, err
}
unpacked, err := image.IsUnpacked(ctx, snapshotter)
if err != nil {
return nil, err
}
if !unpacked {
if err := image.Unpack(ctx, snapshotter); err != nil {
return nil, err
}
}
opts = append(opts, oci.WithImageConfig(image))
cOpts = append(cOpts,
containerd.WithImage(image),
containerd.WithSnapshotter(context.String("snapshotter")),
containerd.WithSnapshotter(snapshotter),
// Even when "readonly" is set, we don't use KindView snapshot here. (#1495)
// We pass writable snapshot to the OCI runtime, and the runtime remounts it as read-only,
// after creating some mount points on demand.