functional-tester: add GRPCURLs for cluster config

GRPC and v2 client address share the same host(port)
but GRPC does not work with schema specified. This fixes
it by adding another member for GRPC without schema, as
we had before.

tools/functional-tester/etcd-tester/cluster.go

@@ -44,6 +44,7 @@ type cluster struct {
 	Agents     []client.Agent
 	Stressers  []Stresser
 	Names      []string
+	GRPCURLs   []string
 	ClientURLs []string
 }
 
@@ -158,6 +159,7 @@ func (c *cluster) Bootstrap() error {
 	c.Agents = agents
 	c.Stressers = stressers
 	c.Names = names
+	c.GRPCURLs = grpcURLs
 	c.ClientURLs = clientURLs
 	return nil
 }
@@ -168,7 +170,7 @@ func (c *cluster) WaitHealth() error {
 	// TODO: set it to a reasonable value. It is set that high because
 	// follower may use long time to catch up the leader when reboot under
 	// reasonable workload (https://github.com/coreos/etcd/issues/2698)
-	healthFunc, urls := setHealthKey, c.ClientURLs
+	healthFunc, urls := setHealthKey, c.GRPCURLs
 	if c.v2Only {
 		healthFunc, urls = setHealthKeyV2, c.ClientURLs
 	}
@@ -188,7 +190,7 @@ func (c *cluster) GetLeader() (int, error) {
 		return 0, nil
 	}
 	cli, err := clientv3.New(clientv3.Config{
-		Endpoints:   c.ClientURLs,
+		Endpoints:   c.GRPCURLs,
 		DialTimeout: 5 * time.Second,
 	})
 	if err != nil {
@@ -300,7 +302,7 @@ func setHealthKeyV2(us []string) error {
 func (c *cluster) getRevisionHash() (map[string]int64, map[string]int64, error) {
 	revs := make(map[string]int64)
 	hashes := make(map[string]int64)
-	for _, u := range c.ClientURLs {
+	for _, u := range c.GRPCURLs {
 		conn, err := grpc.Dial(u, grpc.WithInsecure(), grpc.WithTimeout(5*time.Second))
 		if err != nil {
 			return nil, nil, err
@@ -324,7 +326,7 @@ func (c *cluster) compactKV(rev int64) error {
 		conn *grpc.ClientConn
 		err  error
 	)
-	for _, u := range c.ClientURLs {
+	for _, u := range c.GRPCURLs {
 		conn, err = grpc.Dial(u, grpc.WithInsecure(), grpc.WithTimeout(5*time.Second))
 		if err != nil {
 			continue