*: use grpclog.LoggerV2

Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>

etcdctl/ctlv3/command/global.go

@@ -20,7 +20,6 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
-	"log"
 	"os"
 	"strings"
 	"time"
@@ -31,6 +30,7 @@ import (
 	"github.com/coreos/etcd/pkg/srv"
 	"github.com/coreos/etcd/pkg/transport"
 	"github.com/spf13/cobra"
+	"google.golang.org/grpc/grpclog"
 )
 
 // GlobalFlags are flags that defined globally
@@ -97,7 +97,7 @@ func mustClientFromCmd(cmd *cobra.Command) *clientv3.Client {
 		ExitWithError(ExitError, derr)
 	}
 	if debug {
-		clientv3.SetLogger(log.New(os.Stderr, "grpc: ", 0))
+		clientv3.SetLogger(grpclog.NewLoggerV2(os.Stderr, os.Stderr, os.Stderr))
 	}
 
 	endpoints, err := endpointsFromCmd(cmd)

tools/benchmark/cmd/util.go

@@ -18,12 +18,12 @@ import (
 	"context"
 	"crypto/rand"
 	"fmt"
-	"log"
 	"os"
 	"strings"
 
 	"github.com/coreos/etcd/clientv3"
 	"github.com/coreos/etcd/pkg/report"
+	"google.golang.org/grpc/grpclog"
 )
 
 var (
@@ -98,7 +98,7 @@ func mustCreateConn() *clientv3.Client {
 		return mustCreateConn()
 	}
 
-	clientv3.SetLogger(log.New(os.Stderr, "grpc", 0))
+	clientv3.SetLogger(grpclog.NewLoggerV2(os.Stderr, os.Stderr, os.Stderr))
 
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "dial error: %v\n", err)

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

@@ -16,6 +16,7 @@ package main
 
 import (
 	"fmt"
+	"os"
 	"strings"
 	"sync"
 	"time"
@@ -24,7 +25,7 @@ import (
 	"google.golang.org/grpc/grpclog"
 )
 
-func init() { grpclog.SetLogger(plog) }
+func init() { grpclog.SetLoggerV2(grpclog.NewLoggerV2(os.Stderr, os.Stderr, os.Stderr)) }
 
 type Stresser interface {
 	// Stress starts to stress the etcd cluster