123f1bac35
This enables the ability to specify and existing PVC as a DataSource in a new PVC Spec (eg "clone" and existing volume).
69 lines
2.0 KiB
Go
69 lines
2.0 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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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 persistentvolumeclaim
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import (
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utilfeature "k8s.io/apiserver/pkg/util/feature"
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"k8s.io/kubernetes/pkg/apis/core"
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"k8s.io/kubernetes/pkg/features"
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)
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// DropDisabledFields removes disabled fields from the pvc spec.
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// This should be called from PrepareForCreate/PrepareForUpdate for all resources containing a pvc spec.
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func DropDisabledFields(pvcSpec, oldPVCSpec *core.PersistentVolumeClaimSpec) {
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if !utilfeature.DefaultFeatureGate.Enabled(features.BlockVolume) && !volumeModeInUse(oldPVCSpec) {
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pvcSpec.VolumeMode = nil
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}
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if !dataSourceIsEnabled(pvcSpec) && !dataSourceInUse(oldPVCSpec) {
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pvcSpec.DataSource = nil
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}
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}
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func volumeModeInUse(oldPVCSpec *core.PersistentVolumeClaimSpec) bool {
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if oldPVCSpec == nil {
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return false
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}
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if oldPVCSpec.VolumeMode != nil {
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return true
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}
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return false
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}
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func dataSourceInUse(oldPVCSpec *core.PersistentVolumeClaimSpec) bool {
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if oldPVCSpec == nil {
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return false
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}
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if oldPVCSpec.DataSource != nil {
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return true
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}
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return false
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}
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func dataSourceIsEnabled(pvcSpec *core.PersistentVolumeClaimSpec) bool {
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if pvcSpec.DataSource != nil {
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if pvcSpec.DataSource.Kind == "PersistentVolumeClaim" && utilfeature.DefaultFeatureGate.Enabled(features.VolumeDataSource) {
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return true
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}
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if pvcSpec.DataSource.Kind == "VolumeSnapshot" && utilfeature.DefaultFeatureGate.Enabled(features.VolumeSnapshotDataSource) {
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return true
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}
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}
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return false
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}
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