mysql主主同步以及在环境中遇到的问题
实验： 实现mysql的主主同步
server1
IP：192.168.1.132
server2
IP:192.168.1.133
首先修改配置文件 /etc/my.cnf
server1：
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
**************
log-bin=mysql-bin
server-id = 1
log-slave-updates
slave-skip-errors=all
sync_binlog=1
auto_increment_increment=2
auto_increment_offset=1
master-host = 192.168.1.133
master-user = slave
master-password = 123456
master-port = 3306
**************
server2:
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
user=mysql
*********
log-bin=mysql-bin
server-id = 2
log-slave-updates
slave-skip-errors=all
sync_binlog=1
auto_increment_increment=2
auto_increment_offset = 2 此处注意一下，不能和server1相同
master-host = 192.168.1.132
master-user = slave
master-password = 1234569
master-port = 3306
************
第二步，授权用户
server1:服务器(1.132)
mysql>grant replication slave,file on *.* to 'slave'@'192.168.1.133' identified by '123456';
Query OK, 0 rows affected (0.01 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
server2:服务器(1.133)
mysql>grant replication slave,file on *.* to 'slave'@'192.168.1.132' identified by '123456';
Query OK, 0 rows affected (0.01 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
***** 也可以授权整个网段例如：grant replication slave,file on *.* to 'slave'@'192.168.1.%' identified by '123456';
分别在server1 server2 做登陆测试是否授权成功
第三步：
mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event （如果显示这样，则说明可以从master同步数据，server1和server2状态相同，则说明主主同步完成）
Master_Host: 192.168.1.133
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000008
Read_Master_Log_Pos: 355291
Relay_Log_File: mysqld-relay-bin.000013
Relay_Log_Pos: 339464
Relay_Master_Log_File: mysql-bin.000008
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: 355291
Relay_Log_Space: 339765
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:
过程中的报错：
也可查看日志：找到报错信息 /var/log/mysqld.log server2无法链接server1
140124 5:23:53 [ERROR] Slave I/O: error reconnecting to master '[email protected]:3306' - retry-time: 60 retries: 86400, Error_code: 2013
解决方法：
在server1 执行
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000005 | 408516 | | |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
在server2上面执行：
mysql> slave stop; 从备份停止
Query OK, 0 rows affected, 1 warning (0.00 sec)
mysql> reset slave; 重置
Query OK, 0 rows affected (0.06 sec)
mysql>change master to master_host='192.168.1.132',master_user='slave',master_password='123456',master_log_file='mysql-bin.000005',master_log_pos=408516,master_port=3306;
Query OK, 0 rows affected (0.06 sec)
master_log_file='mysql-bin.000005',master_log_pos=408516 和master 状态保持一直
重启mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event 成功
Master_Host: 192.168.1.132
Master_User: slave
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysql-bin.000005
Read_Master_Log_Pos: 429423
Relay_Log_File: mysqld-relay-bin.000003
Relay_Log_Pos: 251
Relay_Master_Log_File: mysql-bin.000005
Slave_IO_Running: Yes
Slave_SQL_Running: Yes
Replicate_Do_DB: mysql