[zh-cn] Resync some MySQL example YAMLs

content/zh-cn/examples/application/mysql/mysql-services.yaml

@@ -1,10 +1,11 @@
-# Headless service for stable DNS entries of StatefulSet members.
+# 为 StatefulSet 成员提供稳定的 DNS 表项的无头服务（Headless Service）
 apiVersion: v1
 kind: Service
 metadata:
   name: mysql
   labels:
     app: mysql
+    app.kubernetes.io/name: mysql
 spec:
   ports:
   - name: mysql
@@ -13,14 +14,16 @@ spec:
   selector:
     app: mysql
 ---
-# Client service for connecting to any MySQL instance for reads.
-# For writes, you must instead connect to the primary: mysql-0.mysql.
+# 用于连接到任一 MySQL 实例执行读操作的客户端服务
+# 对于写操作，你必须连接到主服务器：mysql-0.mysql
 apiVersion: v1
 kind: Service
 metadata:
   name: mysql-read
   labels:
     app: mysql
+    app.kubernetes.io/name: mysql
+    readonly: "true"
 spec:
   ports:
   - name: mysql