Refactor: Extract kubeclient from cloud provider

pkg/blob/azure.go

@@ -17,7 +17,6 @@ limitations under the License.
 package blob
 
 import (
-	"errors"
 	"fmt"
 	"os"
 	"strings"
@@ -27,9 +26,7 @@ import (
 	"github.com/Azure/azure-sdk-for-go/storage"
 	"github.com/Azure/go-autorest/autorest"
 	"golang.org/x/net/context"
-	clientset "k8s.io/client-go/kubernetes"
-	"k8s.io/client-go/rest"
-	"k8s.io/client-go/tools/clientcmd"
+	"k8s.io/client-go/kubernetes"
 	"k8s.io/klog/v2"
 	"k8s.io/utils/pointer"
 	"sigs.k8s.io/cloud-provider-azure/pkg/azclient/configloader"
@@ -45,36 +42,20 @@ var (
 
 // IsAzureStackCloud decides whether the driver is running on Azure Stack Cloud.
 func IsAzureStackCloud(cloud *azure.Cloud) bool {
-	return !cloud.Config.DisableAzureStackCloud && strings.EqualFold(cloud.Config.Cloud, "AZURESTACKCLOUD")
+	return !cloud.DisableAzureStackCloud && strings.EqualFold(cloud.Cloud, "AZURESTACKCLOUD")
 }
 
 // getCloudProvider get Azure Cloud Provider
-func GetCloudProvider(ctx context.Context, kubeconfig, nodeID, secretName, secretNamespace, userAgent string, allowEmptyCloudConfig bool, kubeAPIQPS float64, kubeAPIBurst int) (*azure.Cloud, error) {
+func GetCloudProvider(ctx context.Context, kubeClient kubernetes.Interface, nodeID, secretName, secretNamespace, userAgent string, allowEmptyCloudConfig bool) (*azure.Cloud, error) {
 	var (
 		config     *azure.Config
-		kubeClient *clientset.Clientset
 		fromSecret bool
+		err        error
 	)
 
 	az := &azure.Cloud{}
 	az.Environment.StorageEndpointSuffix = storage.DefaultBaseURL
 
-	kubeCfg, err := getKubeConfig(kubeconfig)
-	if err == nil && kubeCfg != nil {
-		// set QPS and QPS Burst as higher values
-		klog.V(2).Infof("set QPS(%f) and QPS Burst(%d) for driver kubeClient", float32(kubeAPIQPS), kubeAPIBurst)
-		kubeCfg.QPS = float32(kubeAPIQPS)
-		kubeCfg.Burst = kubeAPIBurst
-		if kubeClient, err = clientset.NewForConfig(kubeCfg); err != nil {
-			klog.Warningf("NewForConfig failed with error: %v", err)
-		}
-	} else {
-		klog.Warningf("get kubeconfig(%s) failed with error: %v", kubeconfig, err)
-		if !os.IsNotExist(err) && !errors.Is(err, rest.ErrNotInCluster) {
-			return az, fmt.Errorf("failed to get KubeClient: %w", err)
-		}
-	}
-
 	if kubeClient != nil {
 		az.KubeClient = kubeClient
 		klog.V(2).Infof("reading cloud config from secret %s/%s", secretNamespace, secretName)
@@ -180,7 +161,7 @@ func (d *Driver) initializeKvClient() (*kv.BaseClient, error) {
 func (d *Driver) getKeyvaultToken() (authorizer autorest.Authorizer, err error) {
 	env := d.cloud.Environment
 	kvEndPoint := strings.TrimSuffix(env.KeyVaultEndpoint, "/")
-	servicePrincipalToken, err := providerconfig.GetServicePrincipalToken(&d.cloud.Config.AzureAuthConfig, &env, kvEndPoint)
+	servicePrincipalToken, err := providerconfig.GetServicePrincipalToken(&d.cloud.AzureAuthConfig, &env, kvEndPoint)
 	if err != nil {
 		return nil, err
 	}
@@ -255,16 +236,3 @@ func (d *Driver) updateSubnetServiceEndpoints(ctx context.Context, vnetResourceG
 
 	return nil
 }
-
-func getKubeConfig(kubeconfig string) (config *rest.Config, err error) {
-	if kubeconfig != "" {
-		if config, err = clientcmd.BuildConfigFromFlags("", kubeconfig); err != nil {
-			return nil, err
-		}
-	} else {
-		if config, err = rest.InClusterConfig(); err != nil {
-			return nil, err
-		}
-	}
-	return config, err
-}

pkg/blob/azure_test.go

@@ -31,6 +31,7 @@ import (
 	"github.com/Azure/go-autorest/autorest/azure"
 	"github.com/stretchr/testify/assert"
 
+	"sigs.k8s.io/blob-csi-driver/pkg/util"
 	"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/subnetclient/mocksubnetclient"
 	azureprovider "sigs.k8s.io/cloud-provider-azure/pkg/provider"
 
@@ -114,7 +115,7 @@ users:
 			kubeconfig:            emptyKubeConfig,
 			nodeID:                "",
 			allowEmptyCloudConfig: true,
-			expectedErr:           fmt.Errorf("failed to get KubeClient: invalid configuration: no configuration has been provided, try setting KUBERNETES_MASTER environment variable"),
+			expectedErr:           fmt.Errorf("invalid configuration: no configuration has been provided, try setting KUBERNETES_MASTER environment variable"),
 		},
 		{
 			desc:                  "[failure] out of cluster & in cluster, specify a fake kubeconfig, no credential file",
@@ -168,7 +169,14 @@ users:
 			}
 			os.Setenv(DefaultAzureCredentialFileEnv, fakeCredFile)
 		}
-		cloud, err := GetCloudProvider(context.Background(), test.kubeconfig, test.nodeID, "", "", test.userAgent, test.allowEmptyCloudConfig, 25.0, 50)
+		kubeClient, err := util.GetKubeClient(test.kubeconfig, 25.0, 50, "")
+		if err != nil {
+			if !reflect.DeepEqual(err, test.expectedErr) && test.expectedErr != nil && !strings.Contains(err.Error(), test.expectedErr.Error()) {
+				t.Errorf("desc: %s,\n input: %q, GetCloudProvider err: %v, expectedErr: %v", test.desc, test.kubeconfig, err, test.expectedErr)
+			}
+			continue
+		}
+		cloud, err := GetCloudProvider(context.Background(), kubeClient, test.nodeID, "", "", test.userAgent, test.allowEmptyCloudConfig)
 		if !reflect.DeepEqual(err, test.expectedErr) && test.expectedErr != nil && !strings.Contains(err.Error(), test.expectedErr.Error()) {
 			t.Errorf("desc: %s,\n input: %q, GetCloudProvider err: %v, expectedErr: %v", test.desc, test.kubeconfig, err, test.expectedErr)
 		}
@@ -374,86 +382,3 @@ func TestUpdateSubnetServiceEndpoints(t *testing.T) {
 		t.Run(tc.name, tc.testFunc)
 	}
 }
-
-func TestGetKubeConfig(t *testing.T) {
-	emptyKubeConfig := "empty-Kube-Config"
-	validKubeConfig := "valid-Kube-Config"
-	fakeContent := `
-apiVersion: v1
-clusters:
-- cluster:
-    server: https://localhost:8080
-  name: foo-cluster
-contexts:
-- context:
-    cluster: foo-cluster
-    user: foo-user
-    namespace: bar
-  name: foo-context
-current-context: foo-context
-kind: Config
-users:
-- name: foo-user
-  user:
-    exec:
-      apiVersion: client.authentication.k8s.io/v1beta1
-      args:
-      - arg-1
-      - arg-2
-      command: foo-command
-`
-	err := createTestFile(emptyKubeConfig)
-	if err != nil {
-		t.Error(err)
-	}
-	defer func() {
-		if err := os.Remove(emptyKubeConfig); err != nil {
-			t.Error(err)
-		}
-	}()
-
-	err = createTestFile(validKubeConfig)
-	if err != nil {
-		t.Error(err)
-	}
-	defer func() {
-		if err := os.Remove(validKubeConfig); err != nil {
-			t.Error(err)
-		}
-	}()
-
-	if err := os.WriteFile(validKubeConfig, []byte(fakeContent), 0666); err != nil {
-		t.Error(err)
-	}
-
-	tests := []struct {
-		desc                     string
-		kubeconfig               string
-		expectError              bool
-		envVariableHasConfig     bool
-		envVariableConfigIsValid bool
-	}{
-		{
-			desc:                     "[success] valid kube config passed",
-			kubeconfig:               validKubeConfig,
-			expectError:              false,
-			envVariableHasConfig:     false,
-			envVariableConfigIsValid: false,
-		},
-		{
-			desc:                     "[failure] invalid kube config passed",
-			kubeconfig:               emptyKubeConfig,
-			expectError:              true,
-			envVariableHasConfig:     false,
-			envVariableConfigIsValid: false,
-		},
-	}
-
-	for _, test := range tests {
-		_, err := getKubeConfig(test.kubeconfig)
-		receiveError := (err != nil)
-		if test.expectError != receiveError {
-			t.Errorf("desc: %s,\n input: %q, GetCloudProvider err: %v, expectErr: %v", test.desc, test.kubeconfig, err, test.expectError)
-		}
-	}
-}

pkg/blob/blob.go

@@ -17,6 +17,8 @@ limitations under the License.
 package blob
 
 import (
+	"context"
+	"flag"
 	"fmt"
 	"os"
 	"strconv"
@@ -29,8 +31,6 @@ import (
 	az "github.com/Azure/go-autorest/autorest/azure"
 	"github.com/container-storage-interface/spec/lib/go/csi"
 	"github.com/pborman/uuid"
-	"golang.org/x/net/context"
-
 	v1 "k8s.io/api/core/v1"
 	"k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
@@ -43,6 +43,7 @@ import (
 	csicommon "sigs.k8s.io/blob-csi-driver/pkg/csi-common"
 	"sigs.k8s.io/blob-csi-driver/pkg/util"
 	azcache "sigs.k8s.io/cloud-provider-azure/pkg/cache"
+	"sigs.k8s.io/cloud-provider-azure/pkg/provider"
 	azure "sigs.k8s.io/cloud-provider-azure/pkg/provider"
 )
 
@@ -167,11 +168,29 @@ type DriverOptions struct {
 	SasTokenExpirationMinutes              int
 }
 
+func (option *DriverOptions) AddFlags() {
+	flag.StringVar(&option.BlobfuseProxyEndpoint, "blobfuse-proxy-endpoint", "unix://tmp/blobfuse-proxy.sock", "blobfuse-proxy endpoint")
+	flag.StringVar(&option.NodeID, "nodeid", "", "node id")
+	flag.StringVar(&option.DriverName, "drivername", DefaultDriverName, "name of the driver")
+	flag.BoolVar(&option.EnableBlobfuseProxy, "enable-blobfuse-proxy", false, "using blobfuse proxy for mounts")
+	flag.IntVar(&option.BlobfuseProxyConnTimout, "blobfuse-proxy-connect-timeout", 5, "blobfuse proxy connection timeout(seconds)")
+	flag.BoolVar(&option.EnableBlobMockMount, "enable-blob-mock-mount", false, "enable mock mount(only for testing)")
+	flag.BoolVar(&option.EnableGetVolumeStats, "enable-get-volume-stats", false, "allow GET_VOLUME_STATS on agent node")
+	flag.BoolVar(&option.AppendTimeStampInCacheDir, "append-timestamp-cache-dir", false, "append timestamp into cache directory on agent node")
+	flag.Uint64Var(&option.MountPermissions, "mount-permissions", 0777, "mounted folder permissions")
+	flag.BoolVar(&option.AllowInlineVolumeKeyAccessWithIdentity, "allow-inline-volume-key-access-with-idenitity", false, "allow accessing storage account key using cluster identity for inline volume")
+	flag.BoolVar(&option.AppendMountErrorHelpLink, "append-mount-error-help-link", true, "Whether to include a link for help with mount errors when a mount error occurs.")
+	flag.BoolVar(&option.EnableAznfsMount, "enable-aznfs-mount", false, "replace nfs mount with aznfs mount")
+	flag.IntVar(&option.VolStatsCacheExpireInMinutes, "vol-stats-cache-expire-in-minutes", 10, "The cache expire time in minutes for volume stats cache")
+	flag.IntVar(&option.SasTokenExpirationMinutes, "sas-token-expiration-minutes", 1440, "sas token expiration minutes during volume cloning")
+}
+
 // Driver implements all interfaces of CSI drivers
 type Driver struct {
 	csicommon.CSIDriver
 
 	cloud                 *azure.Cloud
+	KubeClient            kubernetes.Interface
 	blobfuseProxyEndpoint string
 	// enableBlobMockMount is only for testing, DO NOT set as true in non-testing scenario
 	enableBlobMockMount                    bool
@@ -206,7 +225,8 @@ type Driver struct {
 
 // NewDriver Creates a NewCSIDriver object. Assumes vendor version is equal to driver version &
 // does not support optional driver plugin info manifest field. Refer to CSI spec for more details.
-func NewDriver(options *DriverOptions, cloud *azure.Cloud) *Driver {
+func NewDriver(options *DriverOptions, kubeClient kubernetes.Interface, cloud *provider.Cloud) *Driver {
+	var err error
 	d := Driver{
 		volLockMap:                             util.NewLockMap(),
 		subnetLockMap:                          util.NewLockMap(),
@@ -222,12 +242,13 @@ func NewDriver(options *DriverOptions, cloud *azure.Cloud) *Driver {
 		enableAznfsMount:                       options.EnableAznfsMount,
 		sasTokenExpirationMinutes:              options.SasTokenExpirationMinutes,
 		azcopy:                                 &util.Azcopy{},
+		KubeClient:                             kubeClient,
+		cloud:                                  cloud,
 	}
 	d.Name = options.DriverName
 	d.Version = driverVersion
 	d.NodeID = options.NodeID
 
-	var err error
 	getter := func(key string) (interface{}, error) { return nil, nil }
 	if d.accountSearchCache, err = azcache.NewTimedCache(time.Minute, getter, false); err != nil {
 		klog.Fatalf("%v", err)
@@ -242,7 +263,6 @@ func NewDriver(options *DriverOptions, cloud *azure.Cloud) *Driver {
 	if d.volStatsCache, err = azcache.NewTimedCache(time.Duration(options.VolStatsCacheExpireInMinutes)*time.Minute, getter, false); err != nil {
 		klog.Fatalf("%v", err)
 	}
-	d.cloud = cloud
 	d.mounter = &mount.SafeFormatAndMount{
 		Interface: mount.New(""),
 		Exec:      utilexec.New(),

pkg/blob/blob_test.go

@@ -19,6 +19,7 @@ package blob
 import (
 	"context"
 	"errors"
+	"flag"
 	"fmt"
 	"os"
 	"reflect"
@@ -29,12 +30,10 @@ import (
 	"github.com/Azure/azure-sdk-for-go/services/storage/mgmt/2021-09-01/storage"
 	"github.com/golang/mock/gomock"
 	"github.com/stretchr/testify/assert"
-
 	v1api "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/kubernetes/fake"
-
 	"sigs.k8s.io/blob-csi-driver/pkg/util"
 	"sigs.k8s.io/cloud-provider-azure/pkg/azureclients/storageaccountclient/mockstorageaccountclient"
 	azure "sigs.k8s.io/cloud-provider-azure/pkg/provider"
@@ -56,7 +55,7 @@ func NewFakeDriver() *Driver {
 		BlobfuseProxyConnTimout: 5,
 		EnableBlobMockMount:     false,
 	}
-	driver := NewDriver(&driverOptions, &azure.Cloud{})
+	driver := NewDriver(&driverOptions, nil, &azure.Cloud{})
 	driver.Name = fakeDriverName
 	driver.Version = vendorVersion
 	driver.subnetLockMap = util.NewLockMap()
@@ -72,7 +71,7 @@ func TestNewFakeDriver(t *testing.T) {
 		BlobfuseProxyConnTimout: 5,
 		EnableBlobMockMount:     false,
 	}
-	d := NewDriver(&driverOptions, &azure.Cloud{})
+	d := NewDriver(&driverOptions, nil, &azure.Cloud{})
 	assert.NotNil(t, d)
 }
 
@@ -85,7 +84,7 @@ func TestNewDriver(t *testing.T) {
 		BlobfuseProxyConnTimout: 5,
 		EnableBlobMockMount:     false,
 	}
-	driver := NewDriver(&driverOptions, &azure.Cloud{})
+	driver := NewDriver(&driverOptions, nil, &azure.Cloud{})
 	fakedriver := NewFakeDriver()
 	fakedriver.Name = DefaultDriverName
 	fakedriver.Version = driverVersion
@@ -1231,7 +1230,7 @@ func TestGetSubnetResourceID(t *testing.T) {
 				d.cloud.VnetResourceGroup = "foo"
 				actualOutput := d.getSubnetResourceID("", "", "")
 				expectedOutput := fmt.Sprintf(subnetTemplate, d.cloud.SubscriptionID, "foo", d.cloud.VnetName, d.cloud.SubnetName)
-				assert.Equal(t, actualOutput, expectedOutput, "cloud.SubscriptionID should be used as the SubID")
+				assert.Equal(t, actualOutput, expectedOutput, "config.SubscriptionID should be used as the SubID")
 			},
 		},
 		{
@@ -1259,7 +1258,7 @@ func TestGetSubnetResourceID(t *testing.T) {
 				d.cloud.VnetResourceGroup = ""
 				actualOutput := d.getSubnetResourceID("", "", "")
 				expectedOutput := fmt.Sprintf(subnetTemplate, "bar", d.cloud.ResourceGroup, d.cloud.VnetName, d.cloud.SubnetName)
-				assert.Equal(t, actualOutput, expectedOutput, "cloud.Resourcegroup should be used as the rg")
+				assert.Equal(t, actualOutput, expectedOutput, "config.ResourceGroup should be used as the rg")
 			},
 		},
 		{
@@ -1273,7 +1272,7 @@ func TestGetSubnetResourceID(t *testing.T) {
 				d.cloud.VnetResourceGroup = "fakeVnetResourceGroup"
 				actualOutput := d.getSubnetResourceID("", "", "")
 				expectedOutput := fmt.Sprintf(subnetTemplate, "bar", d.cloud.VnetResourceGroup, d.cloud.VnetName, d.cloud.SubnetName)
-				assert.Equal(t, actualOutput, expectedOutput, "cloud.VnetResourceGroup should be used as the rg")
+				assert.Equal(t, actualOutput, expectedOutput, "config.VnetResourceGroup should be used as the rg")
 			},
 		},
 		{
@@ -1703,3 +1702,21 @@ func TestIsNFSProtocol(t *testing.T) {
 		}
 	}
 }
+
+func TestDriverOptions_AddFlags(t *testing.T) {
+	t.Run("test options", func(t *testing.T) {
+		option := DriverOptions{}
+		option.AddFlags()
+		typeInfo := reflect.TypeOf(option)
+		numOfExpectedOptions := typeInfo.NumField()
+		count := 0
+		flag.CommandLine.VisitAll(func(f *flag.Flag) {
+			if !strings.Contains(f.Name, "test") {
+				count++
+			}
+		})
+		if numOfExpectedOptions != count {
+			t.Errorf("expected %d flags, but found %d flag in DriverOptions", numOfExpectedOptions, count)
+		}
+	})
+}