To support resumable download, the fetcher for a remote must implement
`io.Seeker`. If implemented the `content.Copy` function will detect the
seeker and begin from where the download was terminated by a previous
attempt.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
Prevents a server from sending a large response causing containerd to
allocate too much RAM and potentially OOM.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Support registries returning 204 or 200 in place of 201/202.
Ensure body is closed when request is retried.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Split resolver to only return a name with separate methods
for getting a fetcher and pusher. Add implementation for
push.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
Allow usage of the experimental docker resolver as a package. There are
very few changes to the consuming code, demonstrating the effectiveness
of the abstraction. This move will allow future contributions to a more
featured resolver implementation.
Signed-off-by: Stephen J Day <stephen.day@docker.com>
