mirror of
https://github.com/ceph/ceph-csi.git
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232 lines
8.2 KiB
Go
232 lines
8.2 KiB
Go
/*
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Copyright 2019 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 plugins
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import (
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"fmt"
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"regexp"
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"strings"
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v1 "k8s.io/api/core/v1"
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storage "k8s.io/api/storage/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/klog"
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)
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const (
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// AzureFileDriverName is the name of the CSI driver for Azure File
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AzureFileDriverName = "file.csi.azure.com"
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// AzureFileInTreePluginName is the name of the intree plugin for Azure file
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AzureFileInTreePluginName = "kubernetes.io/azure-file"
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separator = "#"
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volumeIDTemplate = "%s#%s#%s#%s"
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// Parameter names defined in azure file CSI driver, refer to
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// https://github.com/kubernetes-sigs/azurefile-csi-driver/blob/master/docs/driver-parameters.md
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azureFileShareName = "shareName"
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secretNameTemplate = "azure-storage-account-%s-secret"
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defaultSecretNamespace = "default"
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)
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var _ InTreePlugin = &azureFileCSITranslator{}
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var secretNameFormatRE = regexp.MustCompile(`azure-storage-account-(.+)-secret`)
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// azureFileCSITranslator handles translation of PV spec from In-tree
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// Azure File to CSI Azure File and vice versa
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type azureFileCSITranslator struct{}
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// NewAzureFileCSITranslator returns a new instance of azureFileTranslator
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func NewAzureFileCSITranslator() InTreePlugin {
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return &azureFileCSITranslator{}
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}
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// TranslateInTreeStorageClassParametersToCSI translates InTree Azure File storage class parameters to CSI storage class
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func (t *azureFileCSITranslator) TranslateInTreeStorageClassToCSI(sc *storage.StorageClass) (*storage.StorageClass, error) {
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return sc, nil
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}
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// TranslateInTreeInlineVolumeToCSI takes a Volume with AzureFile set from in-tree
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// and converts the AzureFile source to a CSIPersistentVolumeSource
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func (t *azureFileCSITranslator) TranslateInTreeInlineVolumeToCSI(volume *v1.Volume) (*v1.PersistentVolume, error) {
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if volume == nil || volume.AzureFile == nil {
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return nil, fmt.Errorf("volume is nil or Azure File not defined on volume")
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}
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azureSource := volume.AzureFile
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accountName, err := getStorageAccountName(azureSource.SecretName)
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if err != nil {
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klog.Warningf("getStorageAccountName(%s) returned with error: %v", azureSource.SecretName, err)
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accountName = azureSource.SecretName
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}
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var (
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pv = &v1.PersistentVolume{
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ObjectMeta: metav1.ObjectMeta{
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// Must be unique per disk as it is used as the unique part of the
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// staging path
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Name: fmt.Sprintf("%s-%s", AzureFileDriverName, azureSource.ShareName),
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},
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Spec: v1.PersistentVolumeSpec{
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PersistentVolumeSource: v1.PersistentVolumeSource{
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CSI: &v1.CSIPersistentVolumeSource{
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Driver: AzureFileDriverName,
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VolumeHandle: fmt.Sprintf(volumeIDTemplate, "", accountName, azureSource.ShareName, ""),
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ReadOnly: azureSource.ReadOnly,
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VolumeAttributes: map[string]string{azureFileShareName: azureSource.ShareName},
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NodeStageSecretRef: &v1.SecretReference{
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Name: azureSource.SecretName,
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Namespace: defaultSecretNamespace,
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},
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},
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},
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AccessModes: []v1.PersistentVolumeAccessMode{v1.ReadWriteMany},
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},
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}
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)
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return pv, nil
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}
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// TranslateInTreePVToCSI takes a PV with AzureFile set from in-tree
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// and converts the AzureFile source to a CSIPersistentVolumeSource
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func (t *azureFileCSITranslator) TranslateInTreePVToCSI(pv *v1.PersistentVolume) (*v1.PersistentVolume, error) {
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if pv == nil || pv.Spec.AzureFile == nil {
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return nil, fmt.Errorf("pv is nil or Azure File source not defined on pv")
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}
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azureSource := pv.Spec.PersistentVolumeSource.AzureFile
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accountName, err := getStorageAccountName(azureSource.SecretName)
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if err != nil {
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klog.Warningf("getStorageAccountName(%s) returned with error: %v", azureSource.SecretName, err)
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accountName = azureSource.SecretName
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}
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volumeID := fmt.Sprintf(volumeIDTemplate, "", accountName, azureSource.ShareName, "")
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var (
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// refer to https://github.com/kubernetes-sigs/azurefile-csi-driver/blob/master/docs/driver-parameters.md
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csiSource = &v1.CSIPersistentVolumeSource{
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Driver: AzureFileDriverName,
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NodeStageSecretRef: &v1.SecretReference{
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Name: azureSource.SecretName,
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Namespace: defaultSecretNamespace,
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},
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ReadOnly: azureSource.ReadOnly,
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VolumeAttributes: map[string]string{azureFileShareName: azureSource.ShareName},
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VolumeHandle: volumeID,
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}
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)
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if azureSource.SecretNamespace != nil {
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csiSource.NodeStageSecretRef.Namespace = *azureSource.SecretNamespace
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}
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pv.Spec.PersistentVolumeSource.AzureFile = nil
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pv.Spec.PersistentVolumeSource.CSI = csiSource
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return pv, nil
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}
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// TranslateCSIPVToInTree takes a PV with CSIPersistentVolumeSource set and
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// translates the Azure File CSI source to a AzureFile source.
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func (t *azureFileCSITranslator) TranslateCSIPVToInTree(pv *v1.PersistentVolume) (*v1.PersistentVolume, error) {
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if pv == nil || pv.Spec.CSI == nil {
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return nil, fmt.Errorf("pv is nil or CSI source not defined on pv")
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}
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csiSource := pv.Spec.CSI
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// refer to https://github.com/kubernetes-sigs/azurefile-csi-driver/blob/master/docs/driver-parameters.md
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azureSource := &v1.AzureFilePersistentVolumeSource{
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ReadOnly: csiSource.ReadOnly,
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}
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if csiSource.NodeStageSecretRef != nil && csiSource.NodeStageSecretRef.Name != "" {
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azureSource.SecretName = csiSource.NodeStageSecretRef.Name
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azureSource.SecretNamespace = &csiSource.NodeStageSecretRef.Namespace
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if csiSource.VolumeAttributes != nil {
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if shareName, ok := csiSource.VolumeAttributes[azureFileShareName]; ok {
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azureSource.ShareName = shareName
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}
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}
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} else {
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_, storageAccount, fileShareName, _, err := getFileShareInfo(csiSource.VolumeHandle)
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if err != nil {
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return nil, err
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}
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azureSource.ShareName = fileShareName
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azureSource.SecretName = fmt.Sprintf(secretNameTemplate, storageAccount)
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}
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pv.Spec.CSI = nil
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pv.Spec.AzureFile = azureSource
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return pv, nil
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}
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// CanSupport tests whether the plugin supports a given volume
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// specification from the API. The spec pointer should be considered
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// const.
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func (t *azureFileCSITranslator) CanSupport(pv *v1.PersistentVolume) bool {
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return pv != nil && pv.Spec.AzureFile != nil
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}
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// CanSupportInline tests whether the plugin supports a given inline volume
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// specification from the API. The spec pointer should be considered
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// const.
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func (t *azureFileCSITranslator) CanSupportInline(volume *v1.Volume) bool {
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return volume != nil && volume.AzureFile != nil
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}
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// GetInTreePluginName returns the name of the intree plugin driver
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func (t *azureFileCSITranslator) GetInTreePluginName() string {
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return AzureFileInTreePluginName
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}
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// GetCSIPluginName returns the name of the CSI plugin
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func (t *azureFileCSITranslator) GetCSIPluginName() string {
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return AzureFileDriverName
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}
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func (t *azureFileCSITranslator) RepairVolumeHandle(volumeHandle, nodeID string) (string, error) {
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return volumeHandle, nil
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}
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// get file share info according to volume id, e.g.
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// input: "rg#f5713de20cde511e8ba4900#pvc-file-dynamic-17e43f84-f474-11e8-acd0-000d3a00df41#diskname.vhd"
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// output: rg, f5713de20cde511e8ba4900, pvc-file-dynamic-17e43f84-f474-11e8-acd0-000d3a00df41, diskname.vhd
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func getFileShareInfo(id string) (string, string, string, string, error) {
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segments := strings.Split(id, separator)
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if len(segments) < 3 {
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return "", "", "", "", fmt.Errorf("error parsing volume id: %q, should at least contain two #", id)
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}
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var diskName string
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if len(segments) > 3 {
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diskName = segments[3]
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}
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return segments[0], segments[1], segments[2], diskName, nil
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}
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// get storage account name from secret name
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func getStorageAccountName(secretName string) (string, error) {
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matches := secretNameFormatRE.FindStringSubmatch(secretName)
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if len(matches) != 2 {
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return "", fmt.Errorf("could not get account name from %s, correct format: %s", secretName, secretNameFormatRE)
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}
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return matches[1], nil
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}
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