Currently the plugins pkg allows a single handler. This assumption
breaks down if there are mutiple listeners to a plugin of a certain
Manifest such as NetworkDriver or IpamDriver when swarm-mode is enabled.
Signed-off-by: Madhu Venugopal <madhu@docker.com>
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>
