forked from rook/rook
Nitin Goyal
7df51fab59
Expand the functionality of 'ExpandPVCIfRequired' to check if storageclass does allow expansion then only expand the PVC. otherwise skip the expansion. Signed-off-by: Nitin Goyal <nigoyal@redhat.com>
69 lines
2.7 KiB
Go
69 lines
2.7 KiB
Go
/*
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Copyright 2021 The Rook Authors. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package k8sutil
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import (
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"context"
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v1 "k8s.io/api/core/v1"
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storagev1 "k8s.io/api/storage/v1"
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"k8s.io/apimachinery/pkg/types"
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"sigs.k8s.io/controller-runtime/pkg/client"
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)
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// ExpandPVCIfRequired will expand the PVC if requested size is greater than the actual size of existing PVC
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func ExpandPVCIfRequired(client client.Client, desiredPVC *v1.PersistentVolumeClaim, currentPVC *v1.PersistentVolumeClaim) {
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desiredSize, desiredOK := desiredPVC.Spec.Resources.Requests[v1.ResourceStorage]
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currentSize, currentOK := currentPVC.Spec.Resources.Requests[v1.ResourceStorage]
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if !desiredOK || !currentOK {
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logger.Debugf("desired or current size are not specified for PVC %q", currentPVC.Name)
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return
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}
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if desiredSize.Value() > currentSize.Value() {
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if currentPVC.Spec.StorageClassName == nil || *(currentPVC.Spec.StorageClassName) == "" {
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logger.Infof("cannot expand PVC %q because storage class is not provided", currentPVC.ObjectMeta.Name)
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return
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}
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// get StorageClass
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storageClass := &storagev1.StorageClass{}
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err := client.Get(context.TODO(), types.NamespacedName{Name: *(currentPVC.Spec.StorageClassName)}, storageClass)
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if err != nil {
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logger.Errorf("failed to get storageClass %q. %v", *(currentPVC.Spec.StorageClassName), err)
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return
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}
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if storageClass.AllowVolumeExpansion == nil || !*(storageClass.AllowVolumeExpansion) {
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logger.Infof("cannot expand PVC %q. storage class %q does not allow expansion", currentPVC.ObjectMeta.Name, storageClass.ObjectMeta.Name)
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return
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}
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currentPVC.Spec.Resources.Requests[v1.ResourceStorage] = desiredSize
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logger.Infof("updating PVC %q size from %s to %s", currentPVC.Name, currentSize.String(), desiredSize.String())
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if err = client.Update(context.TODO(), currentPVC); err != nil {
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// log the error, but don't fail the reconcile
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logger.Errorf("failed to update PVC size. %v", err)
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return
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}
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logger.Infof("successfully updated PVC %q size", currentPVC.Name)
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} else if desiredSize.Value() < currentSize.Value() {
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logger.Warningf("ignoring request to shrink PVC %q size from %s to %s, only expansion is allowed", currentPVC.Name, currentSize.String(), desiredSize.String())
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}
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}
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