To make task.Delete retriable, this patch caches the delete result in
memory after the shim successfully deletes the task. If a later shutdown
attempt fails, a subsequent Delete retry can complete cleanup and return the
cached exit information.
If containerd restarts after deleting the task, the in-memory cache is lost,
and containerd will publish TaskExit and TaskDelete events again to
subscribers. Currently, the exit status returned by shim-delete is always
137. In a follow-up, containerd-shim-runc-v2 should store the actual exit
status in the state directory, so that shim-delete can reuse it instead of
returning a hard-coded value.
Implements: #8981
Signed-off-by: Wei Fu <fuweid89@gmail.com>
Wei Fu
24dc6900ec