rebase: update kubernetes to v1.25.0

update kubernetes to latest v1.25.0
release.

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/k8s.io/component-helpers/storage/volume/helpers.go

@@ -0,0 +1,70 @@
+/*
+Copyright 2020 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package volume
+
+import (
+	"fmt"
+
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/component-helpers/scheduling/corev1"
+)
+
+// GetPersistentVolumeClaimClass returns StorageClassName. If no storage class was
+// requested, it returns "".
+func GetPersistentVolumeClaimClass(claim *v1.PersistentVolumeClaim) string {
+	// Use beta annotation first
+	if class, found := claim.Annotations[v1.BetaStorageClassAnnotation]; found {
+		return class
+	}
+
+	if claim.Spec.StorageClassName != nil {
+		return *claim.Spec.StorageClassName
+	}
+
+	return ""
+}
+
+// GetPersistentVolumeClass returns StorageClassName.
+func GetPersistentVolumeClass(volume *v1.PersistentVolume) string {
+	// Use beta annotation first
+	if class, found := volume.Annotations[v1.BetaStorageClassAnnotation]; found {
+		return class
+	}
+
+	return volume.Spec.StorageClassName
+}
+
+// CheckNodeAffinity looks at the PV node affinity, and checks if the node has the same corresponding labels
+// This ensures that we don't mount a volume that doesn't belong to this node
+func CheckNodeAffinity(pv *v1.PersistentVolume, nodeLabels map[string]string) error {
+	if pv.Spec.NodeAffinity == nil {
+		return nil
+	}
+
+	if pv.Spec.NodeAffinity.Required != nil {
+		node := &v1.Node{ObjectMeta: metav1.ObjectMeta{Labels: nodeLabels}}
+		terms := pv.Spec.NodeAffinity.Required
+		if matches, err := corev1.MatchNodeSelectorTerms(node, terms); err != nil {
+			return err
+		} else if !matches {
+			return fmt.Errorf("no matching NodeSelectorTerms")
+		}
+	}
+
+	return nil
+}

vendor/k8s.io/component-helpers/storage/volume/pv_helpers.go

@@ -0,0 +1,342 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package volume
+
+import (
+	"fmt"
+
+	v1 "k8s.io/api/core/v1"
+	storage "k8s.io/api/storage/v1"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/apimachinery/pkg/api/resource"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/labels"
+	"k8s.io/client-go/kubernetes/scheme"
+	storagelisters "k8s.io/client-go/listers/storage/v1"
+	"k8s.io/client-go/tools/reference"
+)
+
+const (
+	// AnnBindCompleted Annotation applies to PVCs. It indicates that the lifecycle
+	// of the PVC has passed through the initial setup. This information changes how
+	// we interpret some observations of the state of the objects. Value of this
+	// Annotation does not matter.
+	AnnBindCompleted = "pv.kubernetes.io/bind-completed"
+
+	// AnnBoundByController annotation applies to PVs and PVCs. It indicates that
+	// the binding (PV->PVC or PVC->PV) was installed by the controller. The
+	// absence of this annotation means the binding was done by the user (i.e.
+	// pre-bound). Value of this annotation does not matter.
+	// External PV binders must bind PV the same way as PV controller, otherwise PV
+	// controller may not handle it correctly.
+	AnnBoundByController = "pv.kubernetes.io/bound-by-controller"
+
+	// AnnSelectedNode 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.
+	AnnSelectedNode = "volume.kubernetes.io/selected-node"
+
+	// NotSupportedProvisioner is a special provisioner name which can be set
+	// in storage class to indicate dynamic provisioning is not supported by
+	// the storage.
+	NotSupportedProvisioner = "kubernetes.io/no-provisioner"
+
+	// AnnDynamicallyProvisioned annotation is added to a PV that has been dynamically provisioned by
+	// Kubernetes. Its value is name of volume plugin that created the volume.
+	// It serves both user (to show where a PV comes from) and Kubernetes (to
+	// recognize dynamically provisioned PVs in its decisions).
+	AnnDynamicallyProvisioned = "pv.kubernetes.io/provisioned-by"
+
+	// AnnMigratedTo annotation is added to a PVC and PV that is supposed to be
+	// dynamically provisioned/deleted by by its corresponding CSI driver
+	// through the CSIMigration feature flags. When this annotation is set the
+	// Kubernetes components will "stand-down" and the external-provisioner will
+	// act on the objects
+	AnnMigratedTo = "pv.kubernetes.io/migrated-to"
+
+	// AnnStorageProvisioner annotation is added to a PVC that is supposed to be dynamically
+	// provisioned. Its value is name of volume plugin that is supposed to provision
+	// a volume for this PVC.
+	// TODO: remove beta anno once deprecation period ends
+	AnnStorageProvisioner     = "volume.kubernetes.io/storage-provisioner"
+	AnnBetaStorageProvisioner = "volume.beta.kubernetes.io/storage-provisioner"
+
+	//PVDeletionProtectionFinalizer is the finalizer added by the external-provisioner on the PV
+	PVDeletionProtectionFinalizer = "external-provisioner.volume.kubernetes.io/finalizer"
+
+	// PVDeletionInTreeProtectionFinalizer is the finalizer added to protect PV deletion for in-tree volumes.
+	PVDeletionInTreeProtectionFinalizer = "kubernetes.io/pv-controller"
+)
+
+// IsDelayBindingProvisioning checks if claim provisioning with selected-node annotation
+func IsDelayBindingProvisioning(claim *v1.PersistentVolumeClaim) bool {
+	// When feature VolumeScheduling enabled,
+	// Scheduler signal to the PV controller to start dynamic
+	// provisioning by setting the "AnnSelectedNode" annotation
+	// in the PVC
+	_, ok := claim.Annotations[AnnSelectedNode]
+	return ok
+}
+
+// IsDelayBindingMode checks if claim is in delay binding mode.
+func IsDelayBindingMode(claim *v1.PersistentVolumeClaim, classLister storagelisters.StorageClassLister) (bool, error) {
+	className := GetPersistentVolumeClaimClass(claim)
+	if className == "" {
+		return false, nil
+	}
+
+	class, err := classLister.Get(className)
+	if err != nil {
+		if apierrors.IsNotFound(err) {
+			return false, nil
+		}
+		return false, err
+	}
+
+	if class.VolumeBindingMode == nil {
+		return false, fmt.Errorf("VolumeBindingMode not set for StorageClass %q", className)
+	}
+
+	return *class.VolumeBindingMode == storage.VolumeBindingWaitForFirstConsumer, nil
+}
+
+// GetBindVolumeToClaim returns a new volume which is bound to given claim. In
+// addition, it returns a bool which indicates whether we made modification on
+// original volume.
+func GetBindVolumeToClaim(volume *v1.PersistentVolume, claim *v1.PersistentVolumeClaim) (*v1.PersistentVolume, bool, error) {
+	dirty := false
+
+	// Check if the volume was already bound (either by user or by controller)
+	shouldSetBoundByController := false
+	if !IsVolumeBoundToClaim(volume, claim) {
+		shouldSetBoundByController = true
+	}
+
+	// The volume from method args can be pointing to watcher cache. We must not
+	// modify these, therefore create a copy.
+	volumeClone := volume.DeepCopy()
+
+	// Bind the volume to the claim if it is not bound yet
+	if volume.Spec.ClaimRef == nil ||
+		volume.Spec.ClaimRef.Name != claim.Name ||
+		volume.Spec.ClaimRef.Namespace != claim.Namespace ||
+		volume.Spec.ClaimRef.UID != claim.UID {
+
+		claimRef, err := reference.GetReference(scheme.Scheme, claim)
+		if err != nil {
+			return nil, false, fmt.Errorf("unexpected error getting claim reference: %w", err)
+		}
+		volumeClone.Spec.ClaimRef = claimRef
+		dirty = true
+	}
+
+	// Set AnnBoundByController if it is not set yet
+	if shouldSetBoundByController && !metav1.HasAnnotation(volumeClone.ObjectMeta, AnnBoundByController) {
+		metav1.SetMetaDataAnnotation(&volumeClone.ObjectMeta, AnnBoundByController, "yes")
+		dirty = true
+	}
+
+	return volumeClone, dirty, nil
+}
+
+// IsVolumeBoundToClaim returns true, if given volume is pre-bound or bound
+// to specific claim. Both claim.Name and claim.Namespace must be equal.
+// If claim.UID is present in volume.Spec.ClaimRef, it must be equal too.
+func IsVolumeBoundToClaim(volume *v1.PersistentVolume, claim *v1.PersistentVolumeClaim) bool {
+	if volume.Spec.ClaimRef == nil {
+		return false
+	}
+	if claim.Name != volume.Spec.ClaimRef.Name || claim.Namespace != volume.Spec.ClaimRef.Namespace {
+		return false
+	}
+	if volume.Spec.ClaimRef.UID != "" && claim.UID != volume.Spec.ClaimRef.UID {
+		return false
+	}
+	return true
+}
+
+// FindMatchingVolume goes through the list of volumes to find the best matching volume
+// for the claim.
+//
+// This function is used by both the PV controller and scheduler.
+//
+// delayBinding is true only in the PV controller path.  When set, prebound PVs are still returned
+// as a match for the claim, but unbound PVs are skipped.
+//
+// node is set only in the scheduler path. When set, the PV node affinity is checked against
+// the node's labels.
+//
+// excludedVolumes is only used in the scheduler path, and is needed for evaluating multiple
+// unbound PVCs for a single Pod at one time.  As each PVC finds a matching PV, the chosen
+// PV needs to be excluded from future matching.
+func FindMatchingVolume(
+	claim *v1.PersistentVolumeClaim,
+	volumes []*v1.PersistentVolume,
+	node *v1.Node,
+	excludedVolumes map[string]*v1.PersistentVolume,
+	delayBinding bool) (*v1.PersistentVolume, error) {
+
+	var smallestVolume *v1.PersistentVolume
+	var smallestVolumeQty resource.Quantity
+	requestedQty := claim.Spec.Resources.Requests[v1.ResourceName(v1.ResourceStorage)]
+	requestedClass := GetPersistentVolumeClaimClass(claim)
+
+	var selector labels.Selector
+	if claim.Spec.Selector != nil {
+		internalSelector, err := metav1.LabelSelectorAsSelector(claim.Spec.Selector)
+		if err != nil {
+			return nil, fmt.Errorf("error creating internal label selector for claim: %v: %v", claimToClaimKey(claim), err)
+		}
+		selector = internalSelector
+	}
+
+	// Go through all available volumes with two goals:
+	// - find a volume that is either pre-bound by user or dynamically
+	//   provisioned for this claim. Because of this we need to loop through
+	//   all volumes.
+	// - find the smallest matching one if there is no volume pre-bound to
+	//   the claim.
+	for _, volume := range volumes {
+		if _, ok := excludedVolumes[volume.Name]; ok {
+			// Skip volumes in the excluded list
+			continue
+		}
+		if volume.Spec.ClaimRef != nil && !IsVolumeBoundToClaim(volume, claim) {
+			continue
+		}
+
+		volumeQty := volume.Spec.Capacity[v1.ResourceStorage]
+		if volumeQty.Cmp(requestedQty) < 0 {
+			continue
+		}
+		// filter out mismatching volumeModes
+		if CheckVolumeModeMismatches(&claim.Spec, &volume.Spec) {
+			continue
+		}
+
+		// check if PV's DeletionTimeStamp is set, if so, skip this volume.
+		if volume.ObjectMeta.DeletionTimestamp != nil {
+			continue
+		}
+
+		nodeAffinityValid := true
+		if node != nil {
+			// Scheduler path, check that the PV NodeAffinity
+			// is satisfied by the node
+			// CheckNodeAffinity is the most expensive call in this loop.
+			// We should check cheaper conditions first or consider optimizing this function.
+			err := CheckNodeAffinity(volume, node.Labels)
+			if err != nil {
+				nodeAffinityValid = false
+			}
+		}
+
+		if IsVolumeBoundToClaim(volume, claim) {
+			// If PV node affinity is invalid, return no match.
+			// This means the prebound PV (and therefore PVC)
+			// is not suitable for this node.
+			if !nodeAffinityValid {
+				return nil, nil
+			}
+
+			return volume, nil
+		}
+
+		if node == nil && delayBinding {
+			// PV controller does not bind this claim.
+			// Scheduler will handle binding unbound volumes
+			// Scheduler path will have node != nil
+			continue
+		}
+
+		// filter out:
+		// - volumes in non-available phase
+		// - volumes whose labels don't match the claim's selector, if specified
+		// - volumes in Class that is not requested
+		// - volumes whose NodeAffinity does not match the node
+		if volume.Status.Phase != v1.VolumeAvailable {
+			// We ignore volumes in non-available phase, because volumes that
+			// satisfies matching criteria will be updated to available, binding
+			// them now has high chance of encountering unnecessary failures
+			// due to API conflicts.
+			continue
+		} else if selector != nil && !selector.Matches(labels.Set(volume.Labels)) {
+			continue
+		}
+		if GetPersistentVolumeClass(volume) != requestedClass {
+			continue
+		}
+		if !nodeAffinityValid {
+			continue
+		}
+
+		if node != nil {
+			// Scheduler path
+			// Check that the access modes match
+			if !CheckAccessModes(claim, volume) {
+				continue
+			}
+		}
+
+		if smallestVolume == nil || smallestVolumeQty.Cmp(volumeQty) > 0 {
+			smallestVolume = volume
+			smallestVolumeQty = volumeQty
+		}
+	}
+
+	if smallestVolume != nil {
+		// Found a matching volume
+		return smallestVolume, nil
+	}
+
+	return nil, nil
+}
+
+// CheckVolumeModeMismatches is a convenience method that checks volumeMode for PersistentVolume
+// and PersistentVolumeClaims
+func CheckVolumeModeMismatches(pvcSpec *v1.PersistentVolumeClaimSpec, pvSpec *v1.PersistentVolumeSpec) bool {
+	// In HA upgrades, we cannot guarantee that the apiserver is on a version >= controller-manager.
+	// So we default a nil volumeMode to filesystem
+	requestedVolumeMode := v1.PersistentVolumeFilesystem
+	if pvcSpec.VolumeMode != nil {
+		requestedVolumeMode = *pvcSpec.VolumeMode
+	}
+	pvVolumeMode := v1.PersistentVolumeFilesystem
+	if pvSpec.VolumeMode != nil {
+		pvVolumeMode = *pvSpec.VolumeMode
+	}
+	return requestedVolumeMode != pvVolumeMode
+}
+
+// CheckAccessModes returns true if PV satisfies all the PVC's requested AccessModes
+func CheckAccessModes(claim *v1.PersistentVolumeClaim, volume *v1.PersistentVolume) bool {
+	pvModesMap := map[v1.PersistentVolumeAccessMode]bool{}
+	for _, mode := range volume.Spec.AccessModes {
+		pvModesMap[mode] = true
+	}
+
+	for _, mode := range claim.Spec.AccessModes {
+		_, ok := pvModesMap[mode]
+		if !ok {
+			return false
+		}
+	}
+	return true
+}
+
+func claimToClaimKey(claim *v1.PersistentVolumeClaim) string {
+	return fmt.Sprintf("%s/%s", claim.Namespace, claim.Name)
+}