update vendor csi-lib-utils@v0.6.1

Signed-off-by: Andrew Sy Kim <kiman@vmware.com>

vendor/github.com/kubernetes-csi/csi-lib-utils/leaderelection/leader_election.go

@@ -0,0 +1,211 @@
+/*
+Copyright 2019 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 leaderelection
+
+import (
+	"context"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"regexp"
+	"strings"
+	"time"
+
+	"k8s.io/api/core/v1"
+	"k8s.io/client-go/kubernetes"
+	"k8s.io/client-go/kubernetes/scheme"
+	corev1 "k8s.io/client-go/kubernetes/typed/core/v1"
+	"k8s.io/client-go/tools/leaderelection"
+	"k8s.io/client-go/tools/leaderelection/resourcelock"
+	"k8s.io/client-go/tools/record"
+	"k8s.io/klog"
+)
+
+const (
+	defaultLeaseDuration = 15 * time.Second
+	defaultRenewDeadline = 10 * time.Second
+	defaultRetryPeriod   = 5 * time.Second
+)
+
+// leaderElection is a convenience wrapper around client-go's leader election library.
+type leaderElection struct {
+	runFunc func(ctx context.Context)
+
+	// the lockName identifies the leader election config and should be shared across all members
+	lockName string
+	// the identity is the unique identity of the currently running member
+	identity string
+	// the namespace to store the lock resource
+	namespace string
+	// resourceLock defines the type of leaderelection that should be used
+	// valid options are resourcelock.LeasesResourceLock, resourcelock.EndpointsResourceLock,
+	// and resourcelock.ConfigMapsResourceLock
+	resourceLock string
+
+	leaseDuration time.Duration
+	renewDeadline time.Duration
+	retryPeriod   time.Duration
+
+	clientset kubernetes.Interface
+}
+
+// NewLeaderElection returns the default & preferred leader election type
+func NewLeaderElection(clientset kubernetes.Interface, lockName string, runFunc func(ctx context.Context)) *leaderElection {
+	return NewLeaderElectionWithLeases(clientset, lockName, runFunc)
+}
+
+// NewLeaderElectionWithLeases returns an implementation of leader election using Leases
+func NewLeaderElectionWithLeases(clientset kubernetes.Interface, lockName string, runFunc func(ctx context.Context)) *leaderElection {
+	return &leaderElection{
+		runFunc:       runFunc,
+		lockName:      lockName,
+		resourceLock:  resourcelock.LeasesResourceLock,
+		leaseDuration: defaultLeaseDuration,
+		renewDeadline: defaultRenewDeadline,
+		retryPeriod:   defaultRetryPeriod,
+		clientset:     clientset,
+	}
+}
+
+// NewLeaderElectionWithEndpoints returns an implementation of leader election using Endpoints
+func NewLeaderElectionWithEndpoints(clientset kubernetes.Interface, lockName string, runFunc func(ctx context.Context)) *leaderElection {
+	return &leaderElection{
+		runFunc:       runFunc,
+		lockName:      lockName,
+		resourceLock:  resourcelock.EndpointsResourceLock,
+		leaseDuration: defaultLeaseDuration,
+		renewDeadline: defaultRenewDeadline,
+		retryPeriod:   defaultRetryPeriod,
+		clientset:     clientset,
+	}
+}
+
+// NewLeaderElectionWithConfigMaps returns an implementation of leader election using ConfigMaps
+func NewLeaderElectionWithConfigMaps(clientset kubernetes.Interface, lockName string, runFunc func(ctx context.Context)) *leaderElection {
+	return &leaderElection{
+		runFunc:       runFunc,
+		lockName:      lockName,
+		resourceLock:  resourcelock.ConfigMapsResourceLock,
+		leaseDuration: defaultLeaseDuration,
+		renewDeadline: defaultRenewDeadline,
+		retryPeriod:   defaultRetryPeriod,
+		clientset:     clientset,
+	}
+}
+
+func (l *leaderElection) WithIdentity(identity string) {
+	l.identity = identity
+}
+
+func (l *leaderElection) WithNamespace(namespace string) {
+	l.namespace = namespace
+}
+
+func (l *leaderElection) WithLeaseDuration(leaseDuration time.Duration) {
+	l.leaseDuration = leaseDuration
+}
+
+func (l *leaderElection) WithRenewDeadline(renewDeadline time.Duration) {
+	l.renewDeadline = renewDeadline
+}
+
+func (l *leaderElection) WithRetryPeriod(retryPeriod time.Duration) {
+	l.retryPeriod = retryPeriod
+}
+
+func (l *leaderElection) Run() error {
+	if l.identity == "" {
+		id, err := defaultLeaderElectionIdentity()
+		if err != nil {
+			return fmt.Errorf("error getting the default leader identity: %v", err)
+		}
+
+		l.identity = id
+	}
+
+	if l.namespace == "" {
+		l.namespace = inClusterNamespace()
+	}
+
+	broadcaster := record.NewBroadcaster()
+	broadcaster.StartRecordingToSink(&corev1.EventSinkImpl{Interface: l.clientset.CoreV1().Events(l.namespace)})
+	eventRecorder := broadcaster.NewRecorder(scheme.Scheme, v1.EventSource{Component: fmt.Sprintf("%s/%s", l.lockName, string(l.identity))})
+
+	rlConfig := resourcelock.ResourceLockConfig{
+		Identity:      sanitizeName(l.identity),
+		EventRecorder: eventRecorder,
+	}
+
+	lock, err := resourcelock.New(l.resourceLock, l.namespace, sanitizeName(l.lockName), l.clientset.CoreV1(), l.clientset.CoordinationV1(), rlConfig)
+	if err != nil {
+		return err
+	}
+
+	leaderConfig := leaderelection.LeaderElectionConfig{
+		Lock:          lock,
+		LeaseDuration: l.leaseDuration,
+		RenewDeadline: l.renewDeadline,
+		RetryPeriod:   l.retryPeriod,
+		Callbacks: leaderelection.LeaderCallbacks{
+			OnStartedLeading: func(ctx context.Context) {
+				klog.V(2).Info("became leader, starting")
+				l.runFunc(ctx)
+			},
+			OnStoppedLeading: func() {
+				klog.Fatal("stopped leading")
+			},
+			OnNewLeader: func(identity string) {
+				klog.V(3).Infof("new leader detected, current leader: %s", identity)
+			},
+		},
+	}
+
+	leaderelection.RunOrDie(context.TODO(), leaderConfig)
+	return nil // should never reach here
+}
+
+func defaultLeaderElectionIdentity() (string, error) {
+	return os.Hostname()
+}
+
+// sanitizeName sanitizes the provided string so it can be consumed by leader election library
+func sanitizeName(name string) string {
+	re := regexp.MustCompile("[^a-zA-Z0-9-]")
+	name = re.ReplaceAllString(name, "-")
+	if name[len(name)-1] == '-' {
+		// name must not end with '-'
+		name = name + "X"
+	}
+	return name
+}
+
+// inClusterNamespace returns the namespace in which the pod is running in by checking
+// the env var POD_NAMESPACE, then the file /var/run/secrets/kubernetes.io/serviceaccount/namespace.
+// if neither returns a valid namespace, the "default" namespace is returned
+func inClusterNamespace() string {
+	if ns := os.Getenv("POD_NAMESPACE"); ns != "" {
+		return ns
+	}
+
+	if data, err := ioutil.ReadFile("/var/run/secrets/kubernetes.io/serviceaccount/namespace"); err == nil {
+		if ns := strings.TrimSpace(string(data)); len(ns) > 0 {
+			return ns
+		}
+	}
+
+	return "default"
+}

vendor/github.com/kubernetes-csi/csi-test/.travis.yml

@@ -0,0 +1 @@
+release-tools/travis.yml

vendor/github.com/kubernetes-csi/csi-test/driver/driver-controller.go

@@ -0,0 +1,110 @@
+/*
+Copyright 2019 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 driver
+
+import (
+	"context"
+	"net"
+	"sync"
+
+	"google.golang.org/grpc/reflection"
+
+	csi "github.com/container-storage-interface/spec/lib/go/csi"
+	"google.golang.org/grpc"
+)
+
+// CSIDriverControllerServer is the Controller service component of the driver.
+type CSIDriverControllerServer struct {
+	Controller csi.ControllerServer
+	Identity   csi.IdentityServer
+}
+
+// CSIDriverController is the CSI Driver Controller backend.
+type CSIDriverController struct {
+	listener         net.Listener
+	server           *grpc.Server
+	controllerServer *CSIDriverControllerServer
+	wg               sync.WaitGroup
+	running          bool
+	lock             sync.Mutex
+	creds            *CSICreds
+}
+
+func NewCSIDriverController(controllerServer *CSIDriverControllerServer) *CSIDriverController {
+	return &CSIDriverController{
+		controllerServer: controllerServer,
+	}
+}
+
+func (c *CSIDriverController) goServe(started chan<- bool) {
+	goServe(c.server, &c.wg, c.listener, started)
+}
+
+func (c *CSIDriverController) Address() string {
+	return c.listener.Addr().String()
+}
+
+func (c *CSIDriverController) Start(l net.Listener) error {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
+	// Set listener.
+	c.listener = l
+
+	// Create a new grpc server.
+	c.server = grpc.NewServer(
+		grpc.UnaryInterceptor(c.callInterceptor),
+	)
+
+	if c.controllerServer.Controller != nil {
+		csi.RegisterControllerServer(c.server, c.controllerServer.Controller)
+	}
+	if c.controllerServer.Identity != nil {
+		csi.RegisterIdentityServer(c.server, c.controllerServer.Identity)
+	}
+
+	reflection.Register(c.server)
+
+	waitForServer := make(chan bool)
+	c.goServe(waitForServer)
+	<-waitForServer
+	c.running = true
+	return nil
+}
+
+func (c *CSIDriverController) Stop() {
+	stop(&c.lock, &c.wg, c.server, c.running)
+}
+
+func (c *CSIDriverController) Close() {
+	c.server.Stop()
+}
+
+func (c *CSIDriverController) IsRunning() bool {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
+	return c.running
+}
+
+func (c *CSIDriverController) SetDefaultCreds() {
+	setDefaultCreds(c.creds)
+}
+
+func (c *CSIDriverController) callInterceptor(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+	return callInterceptor(ctx, c.creds, req, info, handler)
+}

vendor/github.com/kubernetes-csi/csi-test/driver/driver-node.go

@@ -0,0 +1,109 @@
+/*
+Copyright 2019 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 driver
+
+import (
+	context "context"
+	"net"
+	"sync"
+
+	csi "github.com/container-storage-interface/spec/lib/go/csi"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/reflection"
+)
+
+// CSIDriverNodeServer is the Node service component of the driver.
+type CSIDriverNodeServer struct {
+	Node     csi.NodeServer
+	Identity csi.IdentityServer
+}
+
+// CSIDriverNode is the CSI Driver Node backend.
+type CSIDriverNode struct {
+	listener   net.Listener
+	server     *grpc.Server
+	nodeServer *CSIDriverNodeServer
+	wg         sync.WaitGroup
+	running    bool
+	lock       sync.Mutex
+	creds      *CSICreds
+}
+
+func NewCSIDriverNode(nodeServer *CSIDriverNodeServer) *CSIDriverNode {
+	return &CSIDriverNode{
+		nodeServer: nodeServer,
+	}
+}
+
+func (c *CSIDriverNode) goServe(started chan<- bool) {
+	goServe(c.server, &c.wg, c.listener, started)
+}
+
+func (c *CSIDriverNode) Address() string {
+	return c.listener.Addr().String()
+}
+
+func (c *CSIDriverNode) Start(l net.Listener) error {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
+	// Set listener.
+	c.listener = l
+
+	// Create a new grpc server.
+	c.server = grpc.NewServer(
+		grpc.UnaryInterceptor(c.callInterceptor),
+	)
+
+	if c.nodeServer.Node != nil {
+		csi.RegisterNodeServer(c.server, c.nodeServer.Node)
+	}
+	if c.nodeServer.Identity != nil {
+		csi.RegisterIdentityServer(c.server, c.nodeServer.Identity)
+	}
+
+	reflection.Register(c.server)
+
+	waitForServer := make(chan bool)
+	c.goServe(waitForServer)
+	<-waitForServer
+	c.running = true
+	return nil
+}
+
+func (c *CSIDriverNode) Stop() {
+	stop(&c.lock, &c.wg, c.server, c.running)
+}
+
+func (c *CSIDriverNode) Close() {
+	c.server.Stop()
+}
+
+func (c *CSIDriverNode) IsRunning() bool {
+	c.lock.Lock()
+	defer c.lock.Unlock()
+
+	return c.running
+}
+
+func (c *CSIDriverNode) SetDefaultCreds() {
+	setDefaultCreds(c.creds)
+}
+
+func (c *CSIDriverNode) callInterceptor(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+	return callInterceptor(ctx, c.creds, req, info, handler)
+}

vendor/github.com/kubernetes-csi/csi-test/driver/driver.go

@@ -41,6 +41,8 @@ var (
 	ErrAuthFailed = errors.New("authentication failed")
 )
 
+// CSIDriverServers is a unified driver component with both Controller and Node
+// services.
 type CSIDriverServers struct {
 	Controller csi.ControllerServer
 	Identity   csi.IdentityServer
@@ -54,14 +56,15 @@ const secretField = "secretKey"
 // secrets. This mock driver has a single string secret with secretField as the
 // key.
 type CSICreds struct {
-	CreateVolumeSecret              string
-	DeleteVolumeSecret              string
-	ControllerPublishVolumeSecret   string
-	ControllerUnpublishVolumeSecret string
-	NodeStageVolumeSecret           string
-	NodePublishVolumeSecret         string
-	CreateSnapshotSecret            string
-	DeleteSnapshotSecret            string
+	CreateVolumeSecret                         string
+	DeleteVolumeSecret                         string
+	ControllerPublishVolumeSecret              string
+	ControllerUnpublishVolumeSecret            string
+	NodeStageVolumeSecret                      string
+	NodePublishVolumeSecret                    string
+	CreateSnapshotSecret                       string
+	DeleteSnapshotSecret                       string
+	ControllerValidateVolumeCapabilitiesSecret string
 }
 
 type CSIDriver struct {
@@ -81,15 +84,7 @@ func NewCSIDriver(servers *CSIDriverServers) *CSIDriver {
 }
 
 func (c *CSIDriver) goServe(started chan<- bool) {
-	c.wg.Add(1)
-	go func() {
-		defer c.wg.Done()
-		started <- true
-		err := c.server.Serve(c.listener)
-		if err != nil {
-			panic(err.Error())
-		}
-	}()
+	goServe(c.server, &c.wg, c.listener, started)
 }
 
 func (c *CSIDriver) Address() string {
@@ -128,15 +123,7 @@ func (c *CSIDriver) Start(l net.Listener) error {
 }
 
 func (c *CSIDriver) Stop() {
-	c.lock.Lock()
-	defer c.lock.Unlock()
-
-	if !c.running {
-		return
-	}
-
-	c.server.Stop()
-	c.wg.Wait()
+	stop(&c.lock, &c.wg, c.server, c.running)
 }
 
 func (c *CSIDriver) Close() {
@@ -152,20 +139,56 @@ func (c *CSIDriver) IsRunning() bool {
 
 // SetDefaultCreds sets the default secrets for CSI creds.
 func (c *CSIDriver) SetDefaultCreds() {
-	c.creds = &CSICreds{
-		CreateVolumeSecret:              "secretval1",
-		DeleteVolumeSecret:              "secretval2",
-		ControllerPublishVolumeSecret:   "secretval3",
-		ControllerUnpublishVolumeSecret: "secretval4",
-		NodeStageVolumeSecret:           "secretval5",
-		NodePublishVolumeSecret:         "secretval6",
-		CreateSnapshotSecret:            "secretval7",
-		DeleteSnapshotSecret:            "secretval8",
-	}
+	setDefaultCreds(c.creds)
 }
 
 func (c *CSIDriver) callInterceptor(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
-	err := c.authInterceptor(req)
+	return callInterceptor(ctx, c.creds, req, info, handler)
+}
+
+// goServe starts a grpc server.
+func goServe(server *grpc.Server, wg *sync.WaitGroup, listener net.Listener, started chan<- bool) {
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		started <- true
+		err := server.Serve(listener)
+		if err != nil {
+			panic(err.Error())
+		}
+	}()
+}
+
+// stop stops a grpc server.
+func stop(lock *sync.Mutex, wg *sync.WaitGroup, server *grpc.Server, running bool) {
+	lock.Lock()
+	defer lock.Unlock()
+
+	if !running {
+		return
+	}
+
+	server.Stop()
+	wg.Wait()
+}
+
+// setDefaultCreds sets the default credentials, given a CSICreds instance.
+func setDefaultCreds(creds *CSICreds) {
+	creds = &CSICreds{
+		CreateVolumeSecret:                         "secretval1",
+		DeleteVolumeSecret:                         "secretval2",
+		ControllerPublishVolumeSecret:              "secretval3",
+		ControllerUnpublishVolumeSecret:            "secretval4",
+		NodeStageVolumeSecret:                      "secretval5",
+		NodePublishVolumeSecret:                    "secretval6",
+		CreateSnapshotSecret:                       "secretval7",
+		DeleteSnapshotSecret:                       "secretval8",
+		ControllerValidateVolumeCapabilitiesSecret: "secretval9",
+	}
+}
+
+func callInterceptor(ctx context.Context, creds *CSICreds, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
+	err := authInterceptor(creds, req)
 	if err != nil {
 		logGRPC(info.FullMethod, req, nil, err)
 		return nil, err
@@ -175,9 +198,9 @@ func (c *CSIDriver) callInterceptor(ctx context.Context, req interface{}, info *
 	return rsp, err
 }
 
-func (c *CSIDriver) authInterceptor(req interface{}) error {
-	if c.creds != nil {
-		authenticated, authErr := isAuthenticated(req, c.creds)
+func authInterceptor(creds *CSICreds, req interface{}) error {
+	if creds != nil {
+		authenticated, authErr := isAuthenticated(req, creds)
 		if !authenticated {
 			if authErr == ErrNoCredentials {
 				return status.Error(codes.InvalidArgument, authErr.Error())
@@ -227,6 +250,8 @@ func isAuthenticated(req interface{}, creds *CSICreds) (bool, error) {
 		return authenticateCreateSnapshot(r, creds)
 	case *csi.DeleteSnapshotRequest:
 		return authenticateDeleteSnapshot(r, creds)
+	case *csi.ValidateVolumeCapabilitiesRequest:
+		return authenticateControllerValidateVolumeCapabilities(r, creds)
 	default:
 		return true, nil
 	}
@@ -264,6 +289,10 @@ func authenticateDeleteSnapshot(req *csi.DeleteSnapshotRequest, creds *CSICreds)
 	return credsCheck(req.GetSecrets(), creds.DeleteSnapshotSecret)
 }
 
+func authenticateControllerValidateVolumeCapabilities(req *csi.ValidateVolumeCapabilitiesRequest, creds *CSICreds) (bool, error) {
+	return credsCheck(req.GetSecrets(), creds.ControllerValidateVolumeCapabilitiesSecret)
+}
+
 func credsCheck(secrets map[string]string, secretVal string) (bool, error) {
 	if len(secrets) == 0 {
 		return false, ErrNoCredentials

vendor/github.com/kubernetes-csi/csi-test/driver/driver.mock.go

@@ -96,6 +96,19 @@ func (m *MockControllerServer) EXPECT() *MockControllerServerMockRecorder {
 	return m.recorder
 }
 
+// ControllerExpandVolume mocks base method
+func (m *MockControllerServer) ControllerExpandVolume(arg0 context.Context, arg1 *csi.ControllerExpandVolumeRequest) (*csi.ControllerExpandVolumeResponse, error) {
+	ret := m.ctrl.Call(m, "ControllerExpandVolume", arg0, arg1)
+	ret0, _ := ret[0].(*csi.ControllerExpandVolumeResponse)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// ControllerExpandVolume indicates an expected call of ControllerExpandVolume
+func (mr *MockControllerServerMockRecorder) ControllerExpandVolume(arg0, arg1 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ControllerExpandVolume", reflect.TypeOf((*MockControllerServer)(nil).ControllerExpandVolume), arg0, arg1)
+}
+
 // ControllerGetCapabilities mocks base method
 func (m *MockControllerServer) ControllerGetCapabilities(arg0 context.Context, arg1 *csi.ControllerGetCapabilitiesRequest) (*csi.ControllerGetCapabilitiesResponse, error) {
 	ret := m.ctrl.Call(m, "ControllerGetCapabilities", arg0, arg1)
@@ -262,6 +275,19 @@ func (m *MockNodeServer) EXPECT() *MockNodeServerMockRecorder {
 	return m.recorder
 }
 
+// NodeExpandVolume mocks base method
+func (m *MockNodeServer) NodeExpandVolume(arg0 context.Context, arg1 *csi.NodeExpandVolumeRequest) (*csi.NodeExpandVolumeResponse, error) {
+	ret := m.ctrl.Call(m, "NodeExpandVolume", arg0, arg1)
+	ret0, _ := ret[0].(*csi.NodeExpandVolumeResponse)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// NodeExpandVolume indicates an expected call of NodeExpandVolume
+func (mr *MockNodeServerMockRecorder) NodeExpandVolume(arg0, arg1 interface{}) *gomock.Call {
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "NodeExpandVolume", reflect.TypeOf((*MockNodeServer)(nil).NodeExpandVolume), arg0, arg1)
+}
+
 // NodeGetCapabilities mocks base method
 func (m *MockNodeServer) NodeGetCapabilities(arg0 context.Context, arg1 *csi.NodeGetCapabilitiesRequest) (*csi.NodeGetCapabilitiesResponse, error) {
 	ret := m.ctrl.Call(m, "NodeGetCapabilities", arg0, arg1)

vendor/github.com/kubernetes-csi/csi-test/driver/mock.go

@@ -46,9 +46,9 @@ func NewMockCSIDriver(servers *MockCSIDriverServers) *MockCSIDriver {
 	}
 }
 
-func (m *MockCSIDriver) Start() error {
-	// Listen on a port assigned by the net package
-	l, err := net.Listen("tcp", "127.0.0.1:0")
+// StartOnAddress starts a new gRPC server listening on given address.
+func (m *MockCSIDriver) StartOnAddress(network, address string) error {
+	l, err := net.Listen(network, address)
 	if err != nil {
 		return err
 	}
@@ -61,6 +61,12 @@ func (m *MockCSIDriver) Start() error {
 	return nil
 }
 
+// Start starts a new gRPC server listening on a random TCP loopback port.
+func (m *MockCSIDriver) Start() error {
+	// Listen on a port assigned by the net package
+	return m.StartOnAddress("tcp", "127.0.0.1:0")
+}
+
 func (m *MockCSIDriver) Nexus() (*grpc.ClientConn, error) {
 	// Start server
 	err := m.Start()

vendor/github.com/kubernetes-csi/csi-test/release-tools/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
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