As part of making graphdrivers support pluginv2, a PluginGetter
interface was necessary for cleaner separation and avoiding import
cycles.
This commit creates a PluginGetter interface and makes pluginStore
implement it. Then the pluginStore object is created in the daemon
(rather than by the plugin manager) and passed to plugin init as
well as to the different subsystems (eg. graphdrivers, volumedrivers).
A side effect of this change was that some code was moved out of
experimental. This is good, since plugin support will be stable soon.
Signed-off-by: Anusha Ragunathan <anusha@docker.com>
Allows people to create out-of-process graphdrivers that can be used
with Docker.
Extensions must be started before Docker otherwise Docker will fail to
start.
Signed-off-by: Brian Goff <cpuguy83@gmail.com>
Anusha Ragunathan