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azure_provision.go
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azure_provision.go
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//go:build !providerless
// +build !providerless
/*
Copyright 2017 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 azure_file
import (
"fmt"
"strings"
"github.com/Azure/azure-sdk-for-go/services/storage/mgmt/2019-06-01/storage"
v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/resource"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
cloudprovider "k8s.io/cloud-provider"
volumehelpers "k8s.io/cloud-provider/volume/helpers"
"k8s.io/klog/v2"
"k8s.io/kubernetes/pkg/volume"
"k8s.io/kubernetes/pkg/volume/util"
"k8s.io/legacy-cloud-providers/azure"
"k8s.io/legacy-cloud-providers/azure/clients/fileclient"
utilstrings "k8s.io/utils/strings"
)
var (
_ volume.DeletableVolumePlugin = &azureFilePlugin{}
_ volume.ProvisionableVolumePlugin = &azureFilePlugin{}
resourceGroupAnnotation = "kubernetes.io/azure-file-resource-group"
)
// Abstract interface to file share operations.
// azure cloud provider should implement it
type azureCloudProvider interface {
// create a file share
CreateFileShare(account *azure.AccountOptions, fileShare *fileclient.ShareOptions) (string, string, error)
// delete a file share
DeleteFileShare(resourceGroup, accountName, shareName string) error
// resize a file share
ResizeFileShare(resourceGroup, accountName, name string, sizeGiB int) error
}
type azureFileDeleter struct {
*azureFile
resourceGroup, accountName, shareName string
azureProvider azureCloudProvider
}
func (plugin *azureFilePlugin) NewDeleter(spec *volume.Spec) (volume.Deleter, error) {
azure, resourceGroup, err := getAzureCloudProvider(plugin.host.GetCloudProvider())
if err != nil {
klog.V(4).Infof("failed to get azure provider")
return nil, err
}
if spec.PersistentVolume != nil && spec.PersistentVolume.ObjectMeta.Annotations[resourceGroupAnnotation] != "" {
resourceGroup = spec.PersistentVolume.ObjectMeta.Annotations[resourceGroupAnnotation]
}
return plugin.newDeleterInternal(spec, &azureSvc{}, azure, resourceGroup)
}
func (plugin *azureFilePlugin) newDeleterInternal(spec *volume.Spec, util azureUtil, azure azureCloudProvider, resourceGroup string) (volume.Deleter, error) {
if spec.PersistentVolume != nil && spec.PersistentVolume.Spec.AzureFile == nil {
return nil, fmt.Errorf("invalid PV spec")
}
secretName, secretNamespace, err := getSecretNameAndNamespace(spec, spec.PersistentVolume.Spec.ClaimRef.Namespace)
if err != nil {
return nil, err
}
shareName := spec.PersistentVolume.Spec.AzureFile.ShareName
if accountName, _, err := util.GetAzureCredentials(plugin.host, secretNamespace, secretName); err != nil {
return nil, err
} else {
return &azureFileDeleter{
azureFile: &azureFile{
volName: spec.Name(),
plugin: plugin,
},
resourceGroup: resourceGroup,
shareName: shareName,
accountName: accountName,
azureProvider: azure,
}, nil
}
}
func (plugin *azureFilePlugin) NewProvisioner(options volume.VolumeOptions) (volume.Provisioner, error) {
azure, resourceGroup, err := getAzureCloudProvider(plugin.host.GetCloudProvider())
if err != nil {
klog.V(4).Infof("failed to get azure provider")
return nil, err
}
if len(options.PVC.Spec.AccessModes) == 0 {
options.PVC.Spec.AccessModes = plugin.GetAccessModes()
}
if resourceGroup != "" {
options.PVC.ObjectMeta.Annotations[resourceGroupAnnotation] = resourceGroup
}
return plugin.newProvisionerInternal(options, azure)
}
func (plugin *azureFilePlugin) newProvisionerInternal(options volume.VolumeOptions, azure azureCloudProvider) (volume.Provisioner, error) {
return &azureFileProvisioner{
azureFile: &azureFile{
plugin: plugin,
},
azureProvider: azure,
util: &azureSvc{},
options: options,
}, nil
}
var _ volume.Deleter = &azureFileDeleter{}
func (f *azureFileDeleter) GetPath() string {
name := azureFilePluginName
return f.plugin.host.GetPodVolumeDir(f.podUID, utilstrings.EscapeQualifiedName(name), f.volName)
}
func (f *azureFileDeleter) Delete() error {
klog.V(4).Infof("deleting volume %s", f.shareName)
return f.azureProvider.DeleteFileShare(f.resourceGroup, f.accountName, f.shareName)
}
type azureFileProvisioner struct {
*azureFile
azureProvider azureCloudProvider
util azureUtil
options volume.VolumeOptions
}
var _ volume.Provisioner = &azureFileProvisioner{}
func (a *azureFileProvisioner) Provision(selectedNode *v1.Node, allowedTopologies []v1.TopologySelectorTerm) (*v1.PersistentVolume, error) {
if !util.ContainsAllAccessModes(a.plugin.GetAccessModes(), a.options.PVC.Spec.AccessModes) {
return nil, fmt.Errorf("invalid AccessModes %v: only AccessModes %v are supported", a.options.PVC.Spec.AccessModes, a.plugin.GetAccessModes())
}
if util.CheckPersistentVolumeClaimModeBlock(a.options.PVC) {
return nil, fmt.Errorf("%s does not support block volume provisioning", a.plugin.GetPluginName())
}
var sku, resourceGroup, location, account, shareName, customTags string
capacity := a.options.PVC.Spec.Resources.Requests[v1.ResourceName(v1.ResourceStorage)]
requestGiB, err := volumehelpers.RoundUpToGiBInt(capacity)
if err != nil {
return nil, err
}
secretNamespace := a.options.PVC.Namespace
// Apply ProvisionerParameters (case-insensitive). We leave validation of
// the values to the cloud provider.
for k, v := range a.options.Parameters {
switch strings.ToLower(k) {
case "skuname":
sku = v
case "location":
location = v
case "storageaccount":
account = v
case "secretnamespace":
secretNamespace = v
case "resourcegroup":
resourceGroup = v
case "sharename":
shareName = v
case "tags":
customTags = v
default:
return nil, fmt.Errorf("invalid option %q for volume plugin %s", k, a.plugin.GetPluginName())
}
}
// TODO: implement c.options.ProvisionerSelector parsing
if a.options.PVC.Spec.Selector != nil {
return nil, fmt.Errorf("claim.Spec.Selector is not supported for dynamic provisioning on Azure file")
}
tags, err := azure.ConvertTagsToMap(customTags)
if err != nil {
return nil, err
}
if shareName == "" {
// File share name has a length limit of 63, it cannot contain two consecutive '-'s, and all letters must be lower case.
name := util.GenerateVolumeName(a.options.ClusterName, a.options.PVName, 63)
shareName = strings.Replace(name, "--", "-", -1)
shareName = strings.ToLower(shareName)
}
if resourceGroup == "" {
resourceGroup = a.options.PVC.ObjectMeta.Annotations[resourceGroupAnnotation]
}
fileShareSize := int(requestGiB)
// when use azure file premium, account kind should be specified as FileStorage
accountKind := string(storage.StorageV2)
if strings.HasPrefix(strings.ToLower(sku), "premium") {
accountKind = string(storage.FileStorage)
// when using azure file premium, the shares have a minimum size
if fileShareSize < minimumPremiumShareSize {
fileShareSize = minimumPremiumShareSize
}
}
accountOptions := &azure.AccountOptions{
Name: account,
Type: sku,
Kind: accountKind,
ResourceGroup: resourceGroup,
Location: location,
Tags: tags,
}
shareOptions := &fileclient.ShareOptions{
Name: shareName,
Protocol: storage.SMB,
RequestGiB: fileShareSize,
}
account, key, err := a.azureProvider.CreateFileShare(accountOptions, shareOptions)
if err != nil {
return nil, err
}
// create a secret for storage account and key
secretName, err := a.util.SetAzureCredentials(a.plugin.host, secretNamespace, account, key)
if err != nil {
return nil, err
}
// create PV
pv := &v1.PersistentVolume{
ObjectMeta: metav1.ObjectMeta{
Name: a.options.PVName,
Labels: map[string]string{},
Annotations: map[string]string{
util.VolumeDynamicallyCreatedByKey: "azure-file-dynamic-provisioner",
resourceGroupAnnotation: resourceGroup,
},
},
Spec: v1.PersistentVolumeSpec{
PersistentVolumeReclaimPolicy: a.options.PersistentVolumeReclaimPolicy,
AccessModes: a.options.PVC.Spec.AccessModes,
Capacity: v1.ResourceList{
v1.ResourceName(v1.ResourceStorage): resource.MustParse(fmt.Sprintf("%dGi", fileShareSize)),
},
PersistentVolumeSource: v1.PersistentVolumeSource{
AzureFile: &v1.AzureFilePersistentVolumeSource{
SecretName: secretName,
ShareName: shareName,
SecretNamespace: &secretNamespace,
},
},
MountOptions: a.options.MountOptions,
},
}
return pv, nil
}
// Return cloud provider
func getAzureCloudProvider(cloudProvider cloudprovider.Interface) (azureCloudProvider, string, error) {
azureCloudProvider, ok := cloudProvider.(*azure.Cloud)
if !ok || azureCloudProvider == nil {
return nil, "", fmt.Errorf("failed to get Azure Cloud Provider. GetCloudProvider returned %v instead", cloudProvider)
}
return azureCloudProvider, azureCloudProvider.ResourceGroup, nil
}