Code change:
<ins> /* 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 plugins import ( "fmt" "regexp" "strings" "k8s.io/api/core/v1" storage "k8s.io/api/storage/v1" ) const ( // AzureDiskDriverName is the name of the CSI driver for Azure Disk AzureDiskDriverName = "disk.csi.azure.com" // AzureDiskInTreePluginName is the name of the intree plugin for Azure Disk AzureDiskInTreePluginName = "kubernetes.io/azure-disk" // Parameter names defined in azure disk CSI driver, refer to // https://github.com/kubernetes-sigs/azuredisk-csi-driver/blob/master/docs/driver-parameters.md azureDiskCachingMode = "cachingMode" azureDiskFSType      = "fsType" ) var ( managedDiskPathRE   = regexp.MustCompile(`.*/subscriptions/(?:.*)/resourceGroups/(?:.*)/providers/Microsoft.Compute/disks/(.+)`) unmanagedDiskPathRE = regexp.MustCompile(`http(?:.*)://(?:.*)/vhds/(.+)`) ) var _ InTreePlugin = &azureDiskCSITranslator{} // azureDiskCSITranslator handles translation of PV spec from In-tree // Azure Disk to CSI Azure Disk and vice versa type azureDiskCSITranslator struct{} // NewAzureDiskCSITranslator returns a new instance of azureDiskTranslator func NewAzureDiskCSITranslator() InTreePlugin { return &azureDiskCSITranslator{} } // TranslateInTreeStorageClassParametersToCSI translates InTree Azure Disk storage class parameters to CSI storage class func (t *azureDiskCSITranslator) TranslateInTreeStorageClassToCSI(sc *storage.StorageClass) (*storage.StorageClass, error) { return sc, nil } // TranslateInTreePVToCSI takes a PV with AzureDisk set from in-tree // and converts the AzureDisk source to a CSIPersistentVolumeSource func (t *azureDiskCSITranslator) TranslateInTreePVToCSI(pv *v1.PersistentVolume) (*v1.PersistentVolume, error) { if pv == nil || pv.Spec.AzureDisk == nil { return nil, fmt.Errorf("pv is nil or Azure Disk source not defined on pv") } azureSource := pv.Spec.PersistentVolumeSource.AzureDisk // refer to https://github.com/kubernetes-sigs/azuredisk-csi-driver/blob/master/docs/driver-parameters.md csiSource := &v1.CSIPersistentVolumeSource{ Driver:           AzureDiskDriverName, VolumeHandle:     azureSource.DataDiskURI, ReadOnly:         *azureSource.ReadOnly, FSType:           *azureSource.FSType, VolumeAttributes: map[string]string{}, } if *azureSource.CachingMode != "" { csiSource.VolumeAttributes[azureDiskCachingMode] = string(*azureSource.CachingMode) } if *azureSource.FSType != "" { csiSource.VolumeAttributes[azureDiskFSType] = *azureSource.FSType } pv.Spec.PersistentVolumeSource.AzureDisk = nil pv.Spec.PersistentVolumeSource.CSI = csiSource pv.Spec.AccessModes = backwardCompatibleAccessModes(pv.Spec.AccessModes) return pv, nil } // TranslateCSIPVToInTree takes a PV with CSIPersistentVolumeSource set and // translates the Azure Disk CSI source to a AzureDisk source. func (t *azureDiskCSITranslator) TranslateCSIPVToInTree(pv *v1.PersistentVolume) (*v1.PersistentVolume, error) { if pv == nil || pv.Spec.CSI == nil { return nil, fmt.Errorf("pv is nil or CSI source not defined on pv") } csiSource := pv.Spec.CSI diskURI := csiSource.VolumeHandle diskName, err := getDiskName(diskURI) if err != nil { return nil, err } // refer to https://github.com/kubernetes-sigs/azuredisk-csi-driver/blob/master/docs/driver-parameters.md azureSource := &v1.AzureDiskVolumeSource{ DiskName:    diskName, DataDiskURI: diskURI, FSType:      &csiSource.FSType, ReadOnly:    &csiSource.ReadOnly, } if csiSource.VolumeAttributes != nil { if cachingMode, ok := csiSource.VolumeAttributes[azureDiskCachingMode]; ok { mode := v1.AzureDataDiskCachingMode(cachingMode) azureSource.CachingMode = &mode } if fsType, ok := csiSource.VolumeAttributes[azureDiskFSType]; ok && fsType != "" { azureSource.FSType = &fsType } } pv.Spec.CSI = nil pv.Spec.AzureDisk = azureSource return pv, nil } // CanSupport tests whether the plugin supports a given volume // specification from the API.  The spec pointer should be considered // const. func (t *azureDiskCSITranslator) CanSupport(pv *v1.PersistentVolume) bool { return pv != nil && pv.Spec.AzureDisk != nil } // GetInTreePluginName returns the name of the intree plugin driver func (t *azureDiskCSITranslator) GetInTreePluginName() string { return AzureDiskInTreePluginName } // GetCSIPluginName returns the name of the CSI plugin func (t *azureDiskCSITranslator) GetCSIPluginName() string { return AzureDiskDriverName } func isManagedDisk(diskURI string) bool { if len(diskURI) > 4 && strings.ToLower(diskURI[:4]) == "http" { return false } return true } func getDiskName(diskURI string) (string, error) { diskPathRE := managedDiskPathRE if !isManagedDisk(diskURI) { diskPathRE = unmanagedDiskPathRE } matches := diskPathRE.FindStringSubmatch(diskURI) if len(matches) != 2 { return "", fmt.Errorf("could not get disk name from %s, correct format: %s", diskURI, diskPathRE) } return matches[1], nil } </ins>

Related discussion:
text: <!-- Please only use this template for submitting enhancement requests --What would you like to be : Azure is not listed as "migratable" in could refer to Why is this needed:
/sig azure /assign