The server already supported a memory backend, but now it must be
specified, rather than just being a fallback if no storage is
specified. This also adds a signer backend to signer, which
previously required a MySQL backend.
Thanks @endophage for the excellent suggestion!
Signed-off-by: Ying Li <ying.li@docker.com>
Previously, if a relative path was provided, it was relative to the
current working directory to wherever the binaries were run. Now
it is relative to whatever config file was used.
Signed-off-by: Ying Li <ying.li@docker.com>
Also support parameterized allowed backends when parsing for
storage backends, so that a DB backend can be tested.
Signed-off-by: Ying Li <ying.li@docker.com>
Ying Li