Pass plugingetter as part of swarm node config.

This is necessary for swarmkit to support cluster wide plugins, such as
globally scoped network plugins.

Signed-off-by: Anusha Ragunathan <anusha.ragunathan@docker.com>

daemon/cluster/executor/backend.go

@@ -56,4 +56,5 @@ type Backend interface {
 	GetRepository(context.Context, reference.NamedTagged, *types.AuthConfig) (distribution.Repository, bool, error)
 	LookupImage(name string) (*types.ImageInspect, error)
 	PluginManager() *plugin.Manager
+	PluginGetter() *plugin.Store
 }

daemon/cluster/noderunner.go

@@ -108,6 +108,7 @@ func (n *nodeRunner) start(conf nodeStartConfig) error {
 		ElectionTick:       3,
 		UnlockKey:          conf.lockKey,
 		AutoLockManagers:   conf.autolock,
+		PluginGetter:       n.cluster.config.Backend.PluginGetter(),
 	}
 	if conf.availability != "" {
 		avail, ok := swarmapi.NodeSpec_Availability_value[strings.ToUpper(string(conf.availability))]

daemon/daemon.go

@@ -1289,6 +1289,11 @@ func (daemon *Daemon) PluginManager() *plugin.Manager { // set up before daemon
 	return daemon.pluginManager
 }
 
+// PluginGetter returns current pluginStore associated with the daemon
+func (daemon *Daemon) PluginGetter() *plugin.Store {
+	return daemon.PluginStore
+}
+
 // CreateDaemonRoot creates the root for the daemon
 func CreateDaemonRoot(config *Config) error {
 	// get the canonical path to the Docker root directory