手机版
你好,游客 登录 注册 搜索
背景:
阅读新闻

MySQL5.7在线开启/关闭GTID

[日期:2016-11-02] 来源:Linux社区  作者:suifu [字体: ]

MySQL5.7在线开启/关闭GTID

环境介绍
Part1:写在最前

截止本文撰写当日,MySQL5.7.16是官网的最新稳定版,本文将用MySQL5.7.16来进行演示。从MySQL5.6开始,支持了GTID复制模式,这种模式其实是把双刃剑,虽然容易搭建主从复制了,但使用不当,就容易出现一些错误,例如error 1236。在MySQL5.6如果开启GTID模式,需要在my.cnf中加入以下几个参数:

①log-bin=mysql-bin

②binlog_format=row

③log_slave_updates=1

④gtid_mode=ON

⑤enforce_gtid_consistency=ON

Warning:警告这里的一些参数不是动态参数,也就是需要重启mysql才能生效。

Part2:环境

[root@HE1 ~]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 4
Server version: 5.7.16-log MySQL Community Server (GPL)
 
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
 
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
 
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
 
mysql> select version();
+------------+
| version()  |
+------------+
| 5.7.16-log |
+------------+
1 row in set (0.00 sec)
mysql> show global variables like 'log_slave%';
+-------------------+-------+
| Variable_name    | Value |
+-------------------+-------+
| log_slave_updates | OFF  |
+-------------------+-------+
1 row in set (0.00 sec)

MySQL5.6开启GTID需要开启log_slave_updates参数,否则启动报错,而5.7不在需要开启该参数。

实战
Part1:搭建传统复制模式

本文环境HE1为从,HE3为主库

[root@HE1 ~]# mysql -uroot -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 7
Server version: 5.7.16-log MySQL Community Server (GPL)
 
Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.
 
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
 
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
 
mysql> show slave status\G
*************************** 1. row ***************************
              Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.1.250
                  Master_User: mysync
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000002
          Read_Master_Log_Pos: 1694
              Relay_Log_File: HE1-relay-bin.000002
                Relay_Log_Pos: 320
        Relay_Master_Log_File: mysql-bin.000002
            Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: 
          Replicate_Ignore_DB: 
          Replicate_Do_Table: 
      Replicate_Ignore_Table: 
      Replicate_Wild_Do_Table: 
  Replicate_Wild_Ignore_Table: 
                  Last_Errno: 0
                  Last_Error: 
                Skip_Counter: 0
          Exec_Master_Log_Pos: 1694
              Relay_Log_Space: 525
              Until_Condition: None
              Until_Log_File: 
                Until_Log_Pos: 0
          Master_SSL_Allowed: No
          Master_SSL_CA_File: 
          Master_SSL_CA_Path: 
              Master_SSL_Cert: 
            Master_SSL_Cipher: 
              Master_SSL_Key: 
        Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error: 
              Last_SQL_Errno: 0
              Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
            Master_Server_Id: 1250
                  Master_UUID: 82b160c7-9a8f-11e6-8412-000c29c6361d
            Master_Info_File: /data/mysql/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates
          Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
    Last_SQL_Error_Timestamp: 
              Master_SSL_Crl: 
          Master_SSL_Crlpath: 
          Retrieved_Gtid_Set: 
            Executed_Gtid_Set: 
                Auto_Position: 0
        Replicate_Rewrite_DB: 
                Channel_Name: 
          Master_TLS_Version: 
1 row in set (0.00 sec)

Part2:传统复制模式切换为GTID

①主库从库都需执行以下命令

mysql> set global gtid_mode='OFF_PERMISSIVE';
Query OK, 0 rows affected (0.01 sec)
mysql> set global gtid_mode='ON_PERMISSIVE';
Query OK, 0 rows affected (0.01 sec)
mysql> set global enforce_gtid_consistency=ON;
Query OK, 0 rows affected (0.00 sec)
mysql> set global gtid_mode='ON';
Query OK, 0 rows affected (0.00 sec)

 ②主库插数从库执行

mysql> show master status;
+------------------+----------+--------------+------------------+----------------------------------------+
| File            | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                      |
+------------------+----------+--------------+------------------+----------------------------------------+
| mysql-bin.000005 |      154 |              |                  | 82b160c7-9a8f-11e6-8412-000c29c6361d:1 |
+------------------+----------+--------------+------------------+----------------------------------------+
1 row in set (0.00 sec)

可以看到gtid_set下面有数了,这说明已经开启了gtid模式

Part3:GTID变更为传统模式

mysql> stop slave;-----从库执行
Query OK, 0 rows affected (0.00 sec)
 
mysql> set global gtid_mode='ON_PERMISSIVE';
Query OK, 0 rows affected (0.00 sec)
 
mysql> set global gtid_mode='OFF_PERMISSIVE';
Query OK, 0 rows affected (0.01 sec)
 
mysql> CHANGE MASTER TO MASTER_AUTO_POSITION=0;
Query OK, 0 rows affected (0.05 sec)
 
mysql> set global gtid_mode='OFF';
Query OK, 0 rows affected (0.00 sec)
 
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
 
mysql> show variables like '%gtid%';
+----------------------------------+----------------------------------------+
| Variable_name                    | Value                                  |
+----------------------------------+----------------------------------------+
| binlog_gtid_simple_recovery      | ON                                    |
| enforce_gtid_consistency        | ON                                    |
| gtid_executed_compression_period | 1000                                  |
| gtid_mode                        | OFF                                    |
| gtid_next                        | AUTOMATIC                              |
| gtid_owned                      |                                        |
| gtid_purged                      | 82b160c7-9a8f-11e6-8412-000c29c6361d:1 |
| session_track_gtids              | OFF                                    |
+----------------------------------+----------------------------------------+
8 rows in set (0.01 sec)


可以看到这里GTID模式已经关了,下面再次开启GTID模式来观察id的变化

mysql> set global gtid_mode='OFF_PERMISSIVE';
Query OK, 0 rows affected (0.01 sec)
mysql> set global gtid_mode='ON_PERMISSIVE';
Query OK, 0 rows affected (0.01 sec)
mysql> set global enforce_gtid_consistency=ON;
Query OK, 0 rows affected (0.00 sec)
mysql> set global gtid_mode='ON';
Query OK, 0 rows affected (0.01 sec)
mysql> 
mysql> 
mysql> show variables like '%gtid%';
+----------------------------------+----------------------------------------+
| Variable_name                    | Value                                  |
+----------------------------------+----------------------------------------+
| binlog_gtid_simple_recovery      | ON                                    |
| enforce_gtid_consistency        | ON                                    |
| gtid_executed_compression_period | 1000                                  |
| gtid_mode                        | ON                                    |
| gtid_next                        | AUTOMATIC                              |
| gtid_owned                      |                                        |
| gtid_purged                      | 82b160c7-9a8f-11e6-8412-000c29c6361d:1 |
| session_track_gtids              | OFF                                    |
+----------------------------------+----------------------------------------+
8 rows in set (0.00 sec)
 
主库做操作,从库执行如下命令会看到gtid_set的值在变化
mysql> show master status;
+------------------+----------+--------------+------------------+------------------------------------------+
| File            | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                        |
+------------------+----------+--------------+------------------+------------------------------------------+
| mysql-bin.000011 |      154 |              |                  | 82b160c7-9a8f-11e6-8412-000c29c6361d:1-2 |
+------------------+----------+--------------+------------------+------------------------------------------+
1 row in set (0.00 sec)
 
mysql> show master status;
+------------------+----------+--------------+------------------+------------------------------------------+
| File            | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set                        |
+------------------+----------+--------------+------------------+------------------------------------------+
| mysql-bin.000011 |      154 |              |                  | 82b160c7-9a8f-11e6-8412-000c29c6361d:1-3 |
+------------------+----------+--------------+------------------+------------------------------------------+
1 row in set (0.00 sec)

本文永久更新链接地址http://www.linuxidc.com/Linux/2016-11/136690.htm

linux
相关资讯       MySQL5.7  MySQL GTID 
本文评论   查看全部评论 (0)
表情: 表情 姓名: 字数

       

评论声明
  • 尊重网上道德,遵守中华人民共和国的各项有关法律法规
  • 承担一切因您的行为而直接或间接导致的民事或刑事法律责任
  • 本站管理人员有权保留或删除其管辖留言中的任意内容
  • 本站有权在网站内转载或引用您的评论
  • 参与本评论即表明您已经阅读并接受上述条款