Update scheduler to use volume limits from CSINode

pkg/scheduler/algorithm/predicates/utils.go

@@ -17,8 +17,15 @@ limitations under the License.
 package predicates
 
 import (
-	"k8s.io/api/core/v1"
+	"strings"
+
+	v1 "k8s.io/api/core/v1"
+	storagev1beta1 "k8s.io/api/storage/v1beta1"
 	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/apimachinery/pkg/util/sets"
+	utilfeature "k8s.io/apiserver/pkg/util/feature"
+	csilibplugins "k8s.io/csi-translation-lib/plugins"
+	"k8s.io/kubernetes/pkg/features"
 	schedulernodeinfo "k8s.io/kubernetes/pkg/scheduler/nodeinfo"
 )
 
@@ -87,3 +94,56 @@ func SetPredicatesOrderingDuringTest(value []string) func() {
 		predicatesOrdering = origVal
 	}
 }
+
+// isCSIMigrationOn returns a boolean value indicating whether
+// the CSI migration has been enabled for a particular storage plugin.
+func isCSIMigrationOn(csiNode *storagev1beta1.CSINode, pluginName string) bool {
+	if csiNode == nil || len(pluginName) == 0 {
+		return false
+	}
+
+	// In-tree storage to CSI driver migration feature should be enabled,
+	// along with the plugin-specific one
+	if !utilfeature.DefaultFeatureGate.Enabled(features.CSIMigration) {
+		return false
+	}
+
+	switch pluginName {
+	case csilibplugins.AWSEBSInTreePluginName:
+		if !utilfeature.DefaultFeatureGate.Enabled(features.CSIMigrationAWS) {
+			return false
+		}
+	case csilibplugins.GCEPDInTreePluginName:
+		if !utilfeature.DefaultFeatureGate.Enabled(features.CSIMigrationGCE) {
+			return false
+		}
+	case csilibplugins.AzureDiskInTreePluginName:
+		if !utilfeature.DefaultFeatureGate.Enabled(features.CSIMigrationAzureDisk) {
+			return false
+		}
+	case csilibplugins.CinderInTreePluginName:
+		if !utilfeature.DefaultFeatureGate.Enabled(features.CSIMigrationOpenStack) {
+			return false
+		}
+	default:
+		return false
+	}
+
+	// The plugin name should be listed in the CSINode object annotation.
+	// This indicates that the plugin has been migrated to a CSI driver in the node.
+	csiNodeAnn := csiNode.GetAnnotations()
+	if csiNodeAnn == nil {
+		return false
+	}
+
+	var mpaSet sets.String
+	mpa := csiNodeAnn[v1.MigratedPluginsAnnotationKey]
+	if len(mpa) == 0 {
+		mpaSet = sets.NewString()
+	} else {
+		tok := strings.Split(mpa, ",")
+		mpaSet = sets.NewString(tok...)
+	}
+
+	return mpaSet.Has(pluginName)
+}