Check volume node affinity before mount

pkg/volume/plugins.go

@@ -241,6 +241,7 @@ type VolumeHost interface {
 type VolumePluginMgr struct {
 	mutex   sync.Mutex
 	plugins map[string]VolumePlugin
+	Host    VolumeHost
 }
 
 // Spec is an internal representation of a volume.  All API volume types translate to Spec.
@@ -339,6 +340,7 @@ func (pm *VolumePluginMgr) InitPlugins(plugins []VolumePlugin, host VolumeHost)
 	pm.mutex.Lock()
 	defer pm.mutex.Unlock()
 
+	pm.Host = host
 	if pm.plugins == nil {
 		pm.plugins = map[string]VolumePlugin{}
 	}