Add dynamic provisioning process

pkg/controller/volume/persistentvolume/pv_controller.go

@@ -135,6 +135,14 @@ const annDynamicallyProvisioned = "pv.kubernetes.io/provisioned-by"
 // a volume for this PVC.
 const annStorageProvisioner = "volume.beta.kubernetes.io/storage-provisioner"
 
+// This annotation is added to a PVC that has been triggered by scheduler to
+// be dynamically provisioned. Its value is the name of the selected node.
+const annSelectedNode = "volume.alpha.kubernetes.io/selected-node"
+
+// If the provisioner name in a storage class is set to "kubernetes.io/no-provisioner",
+// then dynamic provisioning is not supported by the storage.
+const notSupportedProvisioner = "kubernetes.io/no-provisioner"
+
 // CloudVolumeCreatedForClaimNamespaceTag is a name of a tag attached to a real volume in cloud (e.g. AWS EBS or GCE PD)
 // with namespace of a persistent volume claim used to create this volume.
 const CloudVolumeCreatedForClaimNamespaceTag = "kubernetes.io/created-for/pvc/namespace"

pkg/features/kube_features.go

@@ -279,6 +279,12 @@ const (
 	// A node which has closer cpu,memory utilization and volume count is favoured by scheduler
 	// while making decisions.
 	BalanceAttachedNodeVolumes utilfeature.Feature = "BalanceAttachedNodeVolumes"
+
+	// owner: @lichuqiang
+	// alpha: v1.11
+	//
+	// Extend the default scheduler to be aware of volume topology and handle PV provisioning
+	DynamicProvisioningScheduling utilfeature.Feature = "DynamicProvisioningScheduling"
 )
 
 func init() {
@@ -327,6 +333,7 @@ var defaultKubernetesFeatureGates = map[utilfeature.Feature]utilfeature.FeatureS
 	RunAsGroup:                                  {Default: false, PreRelease: utilfeature.Alpha},
 	VolumeSubpath:                               {Default: true, PreRelease: utilfeature.GA},
 	BalanceAttachedNodeVolumes:                  {Default: false, PreRelease: utilfeature.Alpha},
+	DynamicProvisioningScheduling:               {Default: false, PreRelease: utilfeature.Alpha},
 
 	// inherited features from generic apiserver, relisted here to get a conflict if it is changed
 	// unintentionally on either side:

plugin/pkg/auth/authorizer/rbac/bootstrappolicy/policy.go

@@ -506,12 +506,16 @@ func ClusterRoles() []rbacv1.ClusterRole {
 	}
 
 	if utilfeature.DefaultFeatureGate.Enabled(features.VolumeScheduling) {
+		rules := []rbacv1.PolicyRule{
+			rbacv1helpers.NewRule(ReadUpdate...).Groups(legacyGroup).Resources("persistentvolumes").RuleOrDie(),
+			rbacv1helpers.NewRule(Read...).Groups(storageGroup).Resources("storageclasses").RuleOrDie(),
+		}
+		if utilfeature.DefaultFeatureGate.Enabled(features.DynamicProvisioningScheduling) {
+			rules = append(rules, rbacv1helpers.NewRule(ReadUpdate...).Groups(legacyGroup).Resources("persistentvolumeclaims").RuleOrDie())
+		}
 		roles = append(roles, rbacv1.ClusterRole{
 			ObjectMeta: metav1.ObjectMeta{Name: "system:volume-scheduler"},
-			Rules: []rbacv1.PolicyRule{
-				rbacv1helpers.NewRule(ReadUpdate...).Groups(legacyGroup).Resources("persistentvolumes").RuleOrDie(),
-				rbacv1helpers.NewRule(Read...).Groups(storageGroup).Resources("storageclasses").RuleOrDie(),
-			},
+			Rules:      rules,
 		})
 	}