Mysql双主复制

Mysql双主复制

实验环境：mysql_1 172.16.114.15
mysql_2 172.16.114.16
一、在两台机创建授权用户：

GRANT REPLICATION SLAVE ON *.* TO 'loyu'@'%' IDENTIFIED BY '123456';
二、编辑mysql配置文档

[root@mysql-1 ~]# vi /etc/my.cnf
添加如下代码：server-id=1 log-bin=mysql-binlog-slave-updates（缺少之后，双主创建失败）
[root@mysql-2 ~]# vi /etc/my.cnf
server-id=2 log-bin=mysql-binlog-slave-updates（缺少之后，双主创建失败）
三、重启mysql服务

/etc/init.d/mysqld restart

四、在两台机上开启slave复制

mysql> flush tables;
mysql> show master status\G;
***************************1. row ***************************
File: mysql-bin.000002
Position: 106
Binlog_Do_DB:
Binlog_Ignore_DB:
1 row in set (0.00 sec)

ERROR:
No query specified

mysql> slave stop
-> ;
Query OK, 0 rows affected(0.00 sec)

mysql> CHANGE MASTER TOMASTER_HOST='172.16.114.16',MASTER_PORT=3306, MASTER_USER='loyu', MASTER_PASSWORD='123456', MASTER_LOG_FILE='mysql-bin.000002',MASTER_LOG_POS=106;
# 第二台机只需修改 MASTER_HOST='172.16.114.15
Query OK, 0 rows affected(0.03 sec)

mysql> start slave;
Query OK, 0 rows affected(0.00 sec)

mysql> show slave status\G;
***************************1. row ***************************
Slave_IO_State: Waiting formaster to send event
Master_Host: 172.16.114.16
Master_User: loyu
Master_Port: 3306
Connect_Retry: 10
Master_Log_File: mysql-bin.000002
Read_Master_Log_Pos: 106
Relay_Log_File:mysqld-relay-bin.000002
Relay_Log_Pos: 251
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: 106
Relay_Log_Space: 407
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:
1 row in set (0.00 sec)

ERROR:
No query specified

五、测试

在第一台机上创建数据库mysql> create databaseliuyuqing;
Query OK, 1 row affected(0.01 sec)

mysql> use liuyuqing;
Database changed
mysql> create tableloyu(number int);
Query OK, 0 rows affected(0.02 sec)

mysql> insert into loyuvalues(1011);
Query OK, 1 row affected (0.00 sec)
在第二台机器上查看复制情况

在第二台机上创建数据库

在第一台机上查看数据库复制情况