add timeout for ocic connect to server

Signed-off-by: Yao Zengzeng <yaozengzeng@zju.edu.cn>

cmd/client/main.go

@@ -13,13 +13,8 @@ import (
 	pb "k8s.io/kubernetes/pkg/kubelet/api/v1alpha1/runtime"
 )
 
-const (
-	// TODO: Make configurable
-	timeout = 10 * time.Second
-)
-
 func getClientConnection(context *cli.Context) (*grpc.ClientConn, error) {
-	conn, err := grpc.Dial(context.GlobalString("connect"), grpc.WithInsecure(), grpc.WithTimeout(timeout),
+	conn, err := grpc.Dial(context.GlobalString("connect"), grpc.WithInsecure(), grpc.WithTimeout(context.GlobalDuration("timeout")),
 		grpc.WithDialer(func(addr string, timeout time.Duration) (net.Conn, error) {
 			return net.DialTimeout("unix", addr, timeout)
 		}))
@@ -87,6 +82,11 @@ func main() {
 			Value: "/var/run/ocid.sock",
 			Usage: "Socket to connect to",
 		},
+		cli.DurationFlag{
+			Name:  "timeout",
+			Value: 10 * time.Second,
+			Usage: "Timeout of connecting to server",
+		},
 	}
 
 	if err := app.Run(os.Args); err != nil {