initial work for azure file grow size implementation

enable azure file grow size

fix according to comments

fix comments

fix review comments

fix comments

cmd/kube-controller-manager/app/plugins.go

@@ -102,6 +102,7 @@ func ProbeExpandableVolumePlugins(config componentconfig.VolumeConfiguration) []
 	allPlugins = append(allPlugins, glusterfs.ProbeVolumePlugins()...)
 	allPlugins = append(allPlugins, rbd.ProbeVolumePlugins()...)
 	allPlugins = append(allPlugins, azure_dd.ProbeVolumePlugins()...)
+	allPlugins = append(allPlugins, azure_file.ProbeVolumePlugins()...)
 	allPlugins = append(allPlugins, photon_pd.ProbeVolumePlugins()...)
 	allPlugins = append(allPlugins, scaleio.ProbeVolumePlugins()...)
 	allPlugins = append(allPlugins, storageos.ProbeVolumePlugins()...)

pkg/cloudprovider/providers/azure/azure_file.go

@@ -31,13 +31,13 @@ const (
 // FileClient is the interface for creating file shares, interface for test
 // injection.
 type FileClient interface {
-	createFileShare(accountName, accountKey, name string, sizeGB int) error
+	createFileShare(accountName, accountKey, name string, sizeGiB int) error
 	deleteFileShare(accountName, accountKey, name string) error
 }
 
 // create file share
-func (az *Cloud) createFileShare(accountName, accountKey, name string, sizeGB int) error {
+func (az *Cloud) createFileShare(accountName, accountKey, name string, sizeGiB int) error {
-	return az.FileClient.createFileShare(accountName, accountKey, name, sizeGB)
+	return az.FileClient.createFileShare(accountName, accountKey, name, sizeGiB)
 }
 
 func (az *Cloud) deleteFileShare(accountName, accountKey, name string) error {
@@ -48,7 +48,7 @@ type azureFileClient struct {
 	env azure.Environment
 }
 
-func (f *azureFileClient) createFileShare(accountName, accountKey, name string, sizeGB int) error {
+func (f *azureFileClient) createFileShare(accountName, accountKey, name string, sizeGiB int) error {
 	fileClient, err := f.getFileSvcClient(accountName, accountKey)
 	if err != nil {
 		return err
@@ -62,7 +62,7 @@ func (f *azureFileClient) createFileShare(accountName, accountKey, name string,
 	if err = share.Create(nil); err != nil {
 		return fmt.Errorf("failed to create file share, err: %v", err)
 	}
-	share.Properties.Quota = sizeGB
+	share.Properties.Quota = sizeGiB
 	if err = share.SetProperties(nil); err != nil {
 		if err := share.Delete(nil); err != nil {
 			glog.Errorf("Error deleting share: %v", err)

pkg/cloudprovider/providers/azure/azure_storage.go

@@ -23,7 +23,7 @@ import (
 )
 
 // CreateFileShare creates a file share, using a matching storage account
-func (az *Cloud) CreateFileShare(name, storageAccount, storageType, location string, requestGB int) (string, string, error) {
+func (az *Cloud) CreateFileShare(name, storageAccount, storageType, location string, requestGiB int) (string, string, error) {
 	var errResult error
 	accounts := []accountWithLocation{}
 	if len(storageAccount) > 0 {
@@ -46,7 +46,7 @@ func (az *Cloud) CreateFileShare(name, storageAccount, storageType, location str
 				continue
 			}
 
-			if innerErr = az.createFileShare(account.Name, key, name, requestGB); innerErr != nil {
+			if innerErr = az.createFileShare(account.Name, key, name, requestGiB); innerErr != nil {
 				errResult = fmt.Errorf("failed to create share %s in account %s: %v", name, account.Name, innerErr)
 				continue
 			}
@@ -69,3 +69,24 @@ func (az *Cloud) DeleteFileShare(accountName, key, name string) error {
 	glog.V(4).Infof("share %s deleted", name)
 	return nil
 }
+
+// ResizeFileShare resizes a file share
+func (az *Cloud) ResizeFileShare(accountName, accountKey, name string, sizeGiB int) error {
+	fileClient, err := az.getFileSvcClient(accountName, accountKey)
+	if err != nil {
+		return err
+	}
+
+	share := fileClient.GetShareReference(name)
+	if share.Properties.Quota >= sizeGiB {
+		glog.Warningf("file share size(%dGi) is already greater or equal than requested size(%dGi), accountName: %s, shareName: %s",
+			share.Properties.Quota, sizeGiB, accountName, name)
+		return nil
+	}
+	share.Properties.Quota = sizeGiB
+	if err = share.SetProperties(nil); err != nil {
+		return fmt.Errorf("failed to set quota on file share %s, err: %v", name, err)
+	}
+	glog.V(4).Infof("resize file share completed, accountName: %s, shareName: %s, sizeGiB: %d", accountName, name, sizeGiB)
+	return nil
+}

pkg/volume/azure_file/azure_file.go

@@ -21,16 +21,16 @@ import (
 	"os"
 	"runtime"
 
+	"github.com/golang/glog"
 	"k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/resource"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/kubernetes/pkg/cloudprovider"
+	"k8s.io/kubernetes/pkg/cloudprovider/providers/azure"
 	"k8s.io/kubernetes/pkg/util/mount"
 	kstrings "k8s.io/kubernetes/pkg/util/strings"
 	"k8s.io/kubernetes/pkg/volume"
-
-	"github.com/golang/glog"
-	"k8s.io/kubernetes/pkg/cloudprovider"
-	"k8s.io/kubernetes/pkg/cloudprovider/providers/azure"
 	"k8s.io/kubernetes/pkg/volume/util"
 )
 
@@ -45,6 +45,7 @@ type azureFilePlugin struct {
 
 var _ volume.VolumePlugin = &azureFilePlugin{}
 var _ volume.PersistentVolumePlugin = &azureFilePlugin{}
+var _ volume.ExpandableVolumePlugin = &azureFilePlugin{}
 
 const (
 	azureFilePluginName = "kubernetes.io/azure-file"
@@ -139,6 +140,41 @@ func (plugin *azureFilePlugin) newUnmounterInternal(volName string, podUID types
 	}}, nil
 }
 
+func (plugin *azureFilePlugin) RequiresFSResize() bool {
+	return false
+}
+
+func (plugin *azureFilePlugin) ExpandVolumeDevice(
+	spec *volume.Spec,
+	newSize resource.Quantity,
+	oldSize resource.Quantity) (resource.Quantity, error) {
+
+	if spec.PersistentVolume != nil || spec.PersistentVolume.Spec.AzureFile == nil {
+		return oldSize, fmt.Errorf("invalid PV spec")
+	}
+	shareName := spec.PersistentVolume.Spec.AzureFile.ShareName
+	azure, err := getAzureCloudProvider(plugin.host.GetCloudProvider())
+	if err != nil {
+		return oldSize, err
+	}
+
+	secretName, secretNamespace, err := getSecretNameAndNamespace(spec, spec.PersistentVolume.Spec.ClaimRef.Namespace)
+	if err != nil {
+		return oldSize, err
+	}
+
+	accountName, accountKey, err := (&azureSvc{}).GetAzureCredentials(plugin.host, secretNamespace, secretName)
+	if err != nil {
+		return oldSize, err
+	}
+
+	if err := azure.ResizeFileShare(accountName, accountKey, shareName, int(volume.RoundUpToGiB(newSize))); err != nil {
+		return oldSize, err
+	}
+
+	return newSize, nil
+}
+
 func (plugin *azureFilePlugin) ConstructVolumeSpec(volName, mountPath string) (*volume.Spec, error) {
 	azureVolume := &v1.Volume{
 		Name: volName,

pkg/volume/azure_file/azure_provision.go

@@ -38,9 +38,11 @@ var _ volume.ProvisionableVolumePlugin = &azureFilePlugin{}
 // azure cloud provider should implement it
 type azureCloudProvider interface {
 	// create a file share
-	CreateFileShare(name, storageAccount, storageType, location string, requestGB int) (string, string, error)
+	CreateFileShare(name, storageAccount, storageType, location string, requestGiB int) (string, string, error)
 	// delete a file share
 	DeleteFileShare(accountName, key, name string) error
+	// resize a file share
+	ResizeFileShare(accountName, accountKey, name string, sizeGiB int) error
 }
 
 type azureFileDeleter struct {
@@ -141,7 +143,7 @@ func (a *azureFileProvisioner) Provision() (*v1.PersistentVolume, error) {
 	name = strings.Replace(name, "--", "-", -1)
 	capacity := a.options.PVC.Spec.Resources.Requests[v1.ResourceName(v1.ResourceStorage)]
 	requestBytes := capacity.Value()
-	requestGB := int(volume.RoundUpSize(requestBytes, 1024*1024*1024))
+	requestGiB := int(volume.RoundUpSize(requestBytes, 1024*1024*1024))
 	secretNamespace := a.options.PVC.Namespace
 	// Apply ProvisionerParameters (case-insensitive). We leave validation of
 	// the values to the cloud provider.
@@ -164,7 +166,7 @@ func (a *azureFileProvisioner) Provision() (*v1.PersistentVolume, error) {
 		return nil, fmt.Errorf("claim.Spec.Selector is not supported for dynamic provisioning on Azure file")
 	}
 
-	account, key, err := a.azureProvider.CreateFileShare(name, account, sku, location, requestGB)
+	account, key, err := a.azureProvider.CreateFileShare(name, account, sku, location, requestGiB)
 	if err != nil {
 		return nil, err
 	}
@@ -187,7 +189,7 @@ func (a *azureFileProvisioner) Provision() (*v1.PersistentVolume, error) {
 			PersistentVolumeReclaimPolicy: a.options.PersistentVolumeReclaimPolicy,
 			AccessModes:                   a.options.PVC.Spec.AccessModes,
 			Capacity: v1.ResourceList{
-				v1.ResourceName(v1.ResourceStorage): resource.MustParse(fmt.Sprintf("%dGi", requestGB)),
+				v1.ResourceName(v1.ResourceStorage): resource.MustParse(fmt.Sprintf("%dGi", requestGiB)),
 			},
 			PersistentVolumeSource: v1.PersistentVolumeSource{
 				AzureFile: &v1.AzureFilePersistentVolumeSource{

plugin/pkg/admission/persistentvolume/resize/admission.go

@@ -161,5 +161,8 @@ func (pvcr *persistentVolumeClaimResize) checkVolumePlugin(pv *api.PersistentVol
 		return true
 	}
 
+	if pv.Spec.AzureFile != nil {
+		return true
+	}
 	return false
 }