create storage account if necessary when create azure file pvc

use new storage account name generation method

use uuid to generate account name

change azure file account prefix

use uniqueID to generate a storage account name

fix comments

fix comments

fix comments

fix a storage account matching bug

only use UUID in getStorageAccountName func

use shorter storage account prefix for azure file

fix comments

fix comments

fix comments

fix rebase build error

rewrite CreateFileShare code logic

fix gofmt issue

fix test error

fix comments

fix a location matching bug

pkg/cloudprovider/providers/azure/BUILD

@@ -56,6 +56,7 @@ go_library(
         "//vendor/k8s.io/apimachinery/pkg/types:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/errors:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/sets:go_default_library",
+        "//vendor/k8s.io/apimachinery/pkg/util/uuid:go_default_library",
         "//vendor/k8s.io/apimachinery/pkg/util/wait:go_default_library",
         "//vendor/k8s.io/client-go/tools/cache:go_default_library",
         "//vendor/k8s.io/client-go/util/flowcontrol:go_default_library",

pkg/cloudprovider/providers/azure/azure_blobDiskController.go

@@ -91,7 +91,7 @@ func (c *BlobDiskController) CreateVolume(name, storageAccount, storageAccountTy
 		accounts = append(accounts, accountWithLocation{Name: storageAccount})
 	} else {
 		// find a storage account
-		accounts, err = c.common.cloud.getStorageAccounts()
+		accounts, err = c.common.cloud.getStorageAccounts(storageAccountType, location)
 		if err != nil {
 			// TODO: create a storage account and container
 			return "", "", 0, err

pkg/cloudprovider/providers/azure/azure_standard.go

@@ -35,6 +35,7 @@ import (
 	"k8s.io/apimachinery/pkg/types"
 	utilerrors "k8s.io/apimachinery/pkg/util/errors"
 	"k8s.io/apimachinery/pkg/util/sets"
+	"k8s.io/apimachinery/pkg/util/uuid"
 )
 
 const (
@@ -52,6 +53,8 @@ const (
 
 	// nodeLabelRole specifies the role of a node
 	nodeLabelRole = "kubernetes.io/role"
+
+	storageAccountNameMaxLength = 24
 )
 
 var errNotInVMSet = errors.New("vm is not in the vmset")
@@ -658,3 +661,13 @@ func (as *availabilitySet) EnsureBackendPoolDeleted(poolID, vmSetName string) er
 	// Do nothing for availability set.
 	return nil
 }
+
+// get a storage account by UUID
+func generateStorageAccountName(accountNamePrefix string) string {
+	uniqueID := strings.Replace(string(uuid.NewUUID()), "-", "", -1)
+	accountName := strings.ToLower(accountNamePrefix + uniqueID)
+	if len(accountName) > storageAccountNameMaxLength {
+		return accountName[:storageAccountNameMaxLength-1]
+	}
+	return accountName
+}

pkg/cloudprovider/providers/azure/azure_standard_test.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2017 The Kubernetes Authors.
+Copyright 2018 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.
@@ -90,3 +90,33 @@ func TestGetLastSegment(t *testing.T) {
 		}
 	}
 }
+
+func TestGenerateStorageAccountName(t *testing.T) {
+	tests := []struct {
+		prefix string
+	}{
+		{
+			prefix: "",
+		},
+		{
+			prefix: "pvc",
+		},
+		{
+			prefix: "1234512345123451234512345",
+		},
+	}
+
+	for _, test := range tests {
+		accountName := generateStorageAccountName(test.prefix)
+		if len(accountName) > storageAccountNameMaxLength || len(accountName) < 3 {
+			t.Errorf("input prefix: %s, output account name: %s, length not in [3,%d]", test.prefix, accountName, storageAccountNameMaxLength)
+		}
+
+		for _, char := range accountName {
+			if (char < 'a' || char > 'z') && (char < '0' || char > '9') {
+				t.Errorf("input prefix: %s, output account name: %s, there is non-digit or non-letter(%q)", test.prefix, accountName, char)
+				break
+			}
+		}
+	}
+}

pkg/cloudprovider/providers/azure/azure_storage.go

@@ -19,54 +19,75 @@ package azure
 import (
 	"fmt"
 
+	"github.com/Azure/azure-sdk-for-go/arm/storage"
+	"github.com/Azure/go-autorest/autorest/to"
 	"github.com/golang/glog"
 )
 
+const (
+	defaultStorageAccountType  = string(storage.StandardLRS)
+	fileShareAccountNamePrefix = "f"
+)
+
 // CreateFileShare creates a file share, using a matching storage account
-func (az *Cloud) CreateFileShare(name, storageAccount, storageType, location string, requestGiB int) (string, string, error) {
-	var errResult error
-	accounts := []accountWithLocation{}
-	if len(storageAccount) > 0 {
-		accounts = append(accounts, accountWithLocation{Name: storageAccount})
-	} else {
-		// find a storage account
-		accounts, errResult = az.getStorageAccounts()
-		if errResult != nil {
-			// TODO: create a storage account and container
-			return "", "", errResult
+func (az *Cloud) CreateFileShare(shareName, accountName, accountType, location string, requestGiB int) (string, string, error) {
+	if len(accountName) == 0 {
+		// find a storage account that matches accountType
+		accounts, err := az.getStorageAccounts(accountType, location)
+		if err != nil {
+			return "", "", fmt.Errorf("could not list storage accounts for account type %s: %v", accountType, err)
 		}
-	}
-	for _, account := range accounts {
-		glog.V(4).Infof("account %s type %s location %s", account.Name, account.StorageType, account.Location)
-		if ((storageType == "" || account.StorageType == storageType) && (location == "" || account.Location == location)) || len(storageAccount) > 0 {
-			// find the access key with this account
-			key, innerErr := az.getStorageAccesskey(account.Name)
-			if innerErr != nil {
-				errResult = fmt.Errorf("could not get storage key for storage account %s: %v", account.Name, innerErr)
-				continue
+
+		if len(accounts) > 0 {
+			accountName = accounts[0].Name
+			glog.V(4).Infof("found a matching account %s type %s location %s", accounts[0].Name, accounts[0].StorageType, accounts[0].Location)
+		}
+
+		if len(accountName) == 0 {
+			// not found a matching account, now create a new account in current resource group
+			accountName = generateStorageAccountName(fileShareAccountNamePrefix)
+			if location == "" {
+				location = az.Location
+			}
+			if accountType == "" {
+				accountType = defaultStorageAccountType
 			}
 
-			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
+			glog.V(2).Infof("azureFile - no matching account found, begin to create a new account %s in resource group %s, location: %s, accountType: %s",
+				accountName, az.ResourceGroup, location, accountType)
+			cp := storage.AccountCreateParameters{
+				Sku:      &storage.Sku{Name: storage.SkuName(accountType)},
+				Tags:     &map[string]*string{"created-by": to.StringPtr("azure-file")},
+				Location: &location}
+			cancel := make(chan struct{})
+
+			_, errchan := az.StorageAccountClient.Create(az.ResourceGroup, accountName, cp, cancel)
+			err := <-errchan
+			if err != nil {
+				return "", "", fmt.Errorf(fmt.Sprintf("Failed to create storage account %s, error: %s", accountName, err))
 			}
-			glog.V(4).Infof("created share %s in account %s", name, account.Name)
-			return account.Name, key, nil
 		}
 	}
 
-	if errResult == nil {
-		errResult = fmt.Errorf("failed to find a matching storage account")
+	// find the access key with this account
+	accountKey, err := az.getStorageAccesskey(accountName)
+	if err != nil {
+		return "", "", fmt.Errorf("could not get storage key for storage account %s: %v", accountName, err)
 	}
-	return "", "", errResult
+
+	if err := az.createFileShare(accountName, accountKey, shareName, requestGiB); err != nil {
+		return "", "", fmt.Errorf("failed to create share %s in account %s: %v", shareName, accountName, err)
+	}
+	glog.V(4).Infof("created share %s in account %s", shareName, accountName)
+	return accountName, accountKey, nil
 }
 
 // DeleteFileShare deletes a file share using storage account name and key
-func (az *Cloud) DeleteFileShare(accountName, key, name string) error {
-	if err := az.deleteFileShare(accountName, key, name); err != nil {
+func (az *Cloud) DeleteFileShare(accountName, accountKey, shareName string) error {
+	if err := az.deleteFileShare(accountName, accountKey, shareName); err != nil {
 		return err
 	}
-	glog.V(4).Infof("share %s deleted", name)
+	glog.V(4).Infof("share %s deleted", shareName)
 	return nil
 }
 

pkg/cloudprovider/providers/azure/azure_storageaccount.go

@@ -25,29 +25,29 @@ type accountWithLocation struct {
 	Name, StorageType, Location string
 }
 
-// getStorageAccounts gets the storage accounts' name, type, location in a resource group
-func (az *Cloud) getStorageAccounts() ([]accountWithLocation, error) {
+// getStorageAccounts gets name, type, location of all storage accounts in a resource group which matches matchingAccountType
+func (az *Cloud) getStorageAccounts(matchingAccountType, matchingLocation string) ([]accountWithLocation, error) {
 	result, err := az.StorageAccountClient.ListByResourceGroup(az.ResourceGroup)
 	if err != nil {
 		return nil, err
 	}
 	if result.Value == nil {
-		return nil, fmt.Errorf("no storage accounts from resource group %s", az.ResourceGroup)
+		return nil, fmt.Errorf("unexpected error when listing storage accounts from resource group %s", az.ResourceGroup)
 	}
 
 	accounts := []accountWithLocation{}
 	for _, acct := range *result.Value {
-		if acct.Name != nil {
-			name := *acct.Name
-			loc := ""
-			if acct.Location != nil {
-				loc = *acct.Location
+		if acct.Name != nil && acct.Location != nil && acct.Sku != nil {
+			storageType := string((*acct.Sku).Name)
+			if matchingAccountType != "" && !strings.EqualFold(matchingAccountType, storageType) {
+				continue
 			}
-			storageType := ""
-			if acct.Sku != nil {
-				storageType = string((*acct.Sku).Name)
+
+			location := *acct.Location
+			if matchingLocation != "" && !strings.EqualFold(matchingLocation, location) {
+				continue
 			}
-			accounts = append(accounts, accountWithLocation{Name: name, StorageType: storageType, Location: loc})
+			accounts = append(accounts, accountWithLocation{Name: *acct.Name, StorageType: storageType, Location: location})
 		}
 	}
 

pkg/volume/azure_file/azure_provision.go

@@ -38,9 +38,9 @@ var _ volume.ProvisionableVolumePlugin = &azureFilePlugin{}
 // azure cloud provider should implement it
 type azureCloudProvider interface {
 	// create a file share
-	CreateFileShare(name, storageAccount, storageType, location string, requestGiB int) (string, string, error)
+	CreateFileShare(shareName, accountName, accountType, location string, requestGiB int) (string, string, error)
 	// delete a file share
-	DeleteFileShare(accountName, key, name string) error
+	DeleteFileShare(accountName, accountKey, shareName string) error
 	// resize a file share
 	ResizeFileShare(accountName, accountKey, name string, sizeGiB int) error
 }