UPSTREAM: <carry>: add CSI migration feature gates for GCE PD and Azure Disk

This commit is the next natural step for commit 2d9a8f9. It
introduces custom feature gates to enable the CSI migration in
GCE PD and Azure Disk plugins.

See openshift/enhancements#549 for details.

Stop <carrying> the patch when CSI migration becomes GA (i.e.
features.CSIMigrationAzureDisk / features.CSIMigrationGCE are GA).

Author: bertinatto

pkg/features/patch_kube_features.go

@@ -8,21 +8,35 @@ import (
 
 var (
 	// owner: @jsafrane
-	// alpha: v1.21
+	// beta: v1.21
 	//
 	// Enables the AWS EBS CSI migration for the Attach/Detach controller (ADC) only.
 	ADCCSIMigrationAWS featuregate.Feature = "ADC_CSIMigrationAWS"
 
+	// owner: @fbertina
+	// beta: v1.22
+	//
+	// Enables the Azure Disk CSI migration for the Attach/Detach controller (ADC) only.
+	ADCCSIMigrationAzureDisk featuregate.Feature = "ADC_CSIMigrationAzureDisk"
+
 	// owner: @jsafrane
-	// alpha: v1.21
+	// beta: v1.21
 	//
 	// Enables the Cinder CSI migration for the Attach/Detach controller (ADC) only.
 	ADCCSIMigrationCinder featuregate.Feature = "ADC_CSIMigrationCinder"
+
+	// owner: @fbertina
+	// beta: v1.22
+	//
+	// Enables the GCE CSI migration for the Attach/Detach controller (ADC) only.
+	ADCCSIMigrationGCEPD featuregate.Feature = "ADC_CSIMigrationGCEPD"
 )
 
 var ocpDefaultKubernetesFeatureGates = map[featuregate.Feature]featuregate.FeatureSpec{
-	ADCCSIMigrationAWS:    {Default: true, PreRelease: featuregate.Beta},
-	ADCCSIMigrationCinder: {Default: true, PreRelease: featuregate.Beta},
+	ADCCSIMigrationAWS:       {Default: true, PreRelease: featuregate.Beta},
+	ADCCSIMigrationAzureDisk: {Default: true, PreRelease: featuregate.Beta},
+	ADCCSIMigrationCinder:    {Default: true, PreRelease: featuregate.Beta},
+	ADCCSIMigrationGCEPD:     {Default: true, PreRelease: featuregate.Beta},
 }
 
 func init() {

pkg/volume/csimigration/patch_adc_plugin_manager.go

@@ -26,8 +26,12 @@ func (pm PluginManager) adcIsMigrationEnabledForPlugin(pluginName string) bool {
 	switch pluginName {
 	case csilibplugins.AWSEBSInTreePluginName:
 		return pm.featureGate.Enabled(features.ADCCSIMigrationAWS)
+	case csilibplugins.AzureDiskInTreePluginName:
+		return pm.featureGate.Enabled(features.ADCCSIMigrationAzureDisk)
 	case csilibplugins.CinderInTreePluginName:
 		return pm.featureGate.Enabled(features.ADCCSIMigrationCinder)
+	case csilibplugins.GCEPDInTreePluginName:
+		return pm.featureGate.Enabled(features.ADCCSIMigrationGCEPD)
 	default:
 		return pm.isMigrationEnabledForPlugin(pluginName)
 	}