配置mysql5.6.xGTID主从复制方法

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本文环境:
主库：CentOS6.7 x64 192.168.0.65 mysql-5.6.29
备库：CentOS6.7 x64 192.168.0.66 mysql-5.6.29

一、配置Mysql5.6 GTID主从（本节配置适合主从都是空库的情况）

1. mysql主云服务器配置

说明: 基于GTID的主从复制需要在配置文件中添加如下内容。

# vi /etc/my.cnf

[mysqld]
binlog-format                = ROW
log-bin                      = master-bin
log-bin-index                = master-bin.index
log-slave-updates            = true
gtid-mode                    = on
enforce-gtid-consistency     = true
master-info-repository       = TABLE
relay-log-info-repository    = TABLE
sync-master-info             = 1
slave-parallel-workers       = 2
binlog-checksum              = CRC32
master-verify-checksum       = 1
slave-sql-verify-checksum    = 1
binlog-rows-query-log_events = 1
report-host                  = 192.168.1.120
server-id                    = 1

重启数据库:
# service mysqld restart

2. 主云服务器配置同步复制帐号

grant replication slave on *.* to 'repl'@'%' identified by '123456';
flush privileges;

3. mysql从云服务器配置

说明: 默认只要server-id不相同即可。

# vi /etc/my.cnf

[mysqld]
binlog-format                = ROW
log-bin                      = mysql-bin
relay-log                    = slave-relay-bin
relay-log-index              = slave-relay-bin.index
log-slave-updates            = true
gtid-mode                    = on
enforce-gtid-consistency     = true
master-info-repository       = TABLE
relay-log-info-repository    = TABLE
sync-master-info             = 1
slave-parallel-workers       = 2
binlog-checksum              = CRC32
master-verify-checksum       = 1
slave-sql-verify-checksum    = 1
binlog-rows-query-log_events = 1
report-host                  = 192.168.1.121
server-id                    = 11

重启数据库:
# service mysqld restart

4. 连接主Mysql,配置主从

(1) 连接主数据库

mysql>
CHANGE MASTER TO
MASTER_HOST='192.168.0.65',
MASTER_PORT=3306,
MASTER_USER='repl',
MASTER_PASSWORD='123456',
MASTER_AUTO_POSITION=1;

(2) 启动从同步进程

mysql> start slave;
mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.0.65
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: master-bin.000007
          Read_Master_Log_Pos: 290
               Relay_Log_File: slave-relay-bin.000002
                Relay_Log_Pos: 502
        Relay_Master_Log_File: master-bin.000007
             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: mysql.%
                   Last_Errno: 0
                   Last_Error:
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 290
              Relay_Log_Space: 706
              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: 1
                  Master_UUID: c8bb22a1-024e-11e6-a1e8-000c29225fa0
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
           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: 1
1 row in set (0.00 sec)

ERROR:
No query specified

mysql>

#查看如下两个参数为YES，说明从库运行正常。
Slave_IO_Running: Yes
Slave_SQL_Running: Yes

5. 验证同步情况

(1) 主数据库创建一个数据库

mysql> create database abc;
Query OK, 1 row affected (0.02 sec)

mysql> show master status\G;
*************************** 1. row ***************************
             File: master-bin.000007
         Position: 290
     Binlog_Do_DB:
Binlog_Ignore_DB:
Executed_Gtid_Set: c8bb22a1-024e-11e6-a1e8-000c29225fa0:1
1 row in set (0.00 sec)

ERROR:
No query specified

mysql>

(2) 从数据库查看同步情况

mysql> show slave status\G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.0.65
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: master-bin.000007
          Read_Master_Log_Pos: 290
               Relay_Log_File: slave-relay-bin.000002
                Relay_Log_Pos: 502
        Relay_Master_Log_File: master-bin.000007
             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: mysql.%
                   Last_Errno: 0
                   Last_Error:
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 290
              Relay_Log_Space: 706
              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: 1
                  Master_UUID: c8bb22a1-024e-11e6-a1e8-000c29225fa0
             Master_Info_File: mysql.slave_master_info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
           Master_Retry_Count: 86400
                  Master_Bind:
      Last_IO_Error_Timestamp:
     Last_SQL_Error_Timestamp:
               Master_SSL_Crl:
           Master_SSL_Crlpath:
           Retrieved_Gtid_Set: c8bb22a1-024e-11e6-a1e8-000c29225fa0:1
            Executed_Gtid_Set: c8bb22a1-024e-11e6-a1e8-000c29225fa0:1
                Auto_Position: 1
1 row in set (0.00 sec)

ERROR:
No query specified
mysql>

二、配置Mysql5.6 GTID主从（主从异步模式转成GTID模式）方式二

mysql-5.6主从同步配置示例 http://koumm.blog.51cto.com/703525/1764093

原环境本身已经是异步主从同步模式。

1，从主库添加如上GTID相关配置文件，重启数据库后，主库锁表，备份数据库。

mysql> flush tables with read lock;

2，从库操重新配置从库，清除掉原来的主库配置信息, 或者采用导入数据库。

mysql> stop slave;
mysql> reset slave;

3，在保证数据同步的情况下从库重新连接主库同步。

mysql>
CHANGE MASTER TO
MASTER_HOST='192.168.0.65',
MASTER_PORT=3306,
MASTER_USER='repl',
MASTER_PASSWORD='123456',
MASTER_AUTO_POSITION=1;

4，主库

mysql> unlock tables;

5，从库启动并测试同步情况

三、小结

可以在GTID的基础上配置半自动同步复制,可以查看相关文档，实际环境中需要对GTID相当了解后再用于生产环境。

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