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本篇文章为大家展示了 mysql 数据库中怎么实现双向同步热备，内容简明扼要并且容易理解，绝对能使你眼前一亮，通过这篇文章的详细介绍希望你能有所收获。
环境：
Master server: 10.224.194.239
Slave server: 10.224.194.237
步骤：
1. 分别在 Master/Slaver mysql db 创建 backup user：
GRANT FILE ON *.* TO [email protected] IDENTIFIED BY pass
GRANT REPLICATION SLAVE ON *.* TO [email protected] IDENTIFIED BY pass
GRANT FILE ON *.* TO [email protected] IDENTIFIED BY pass
GRANT REPLICATION SLAVE ON *.* TO [email protected] IDENTIFIED BY pass
2. 在 Master server 配置 /etc/my.cf 文件：
server-id = 1
binlog-do-db=test
binlog-ignore-db = mysql
replicate-do-db=test
replicate-ignore-db = mysql
master-host=10.224.194.237
master-user=backup
master-password=pass
master-port=3306
master-connect-retry=60
slave-skip-errors=all
3. 在 Master server 配置 /etc/my.cf 文件：
server-id = 2
binlog-do-db=test
binlog-ignore-db = mysql
replicate-do-db=test
replicate-ignore-db = mysql
master-host=10.224.194.239
master-user=backup
master-password=pass
master-port=3306
master-connect-retry=60
slave-skip-errors=all
4. 重启 mysql，验证命令如下：
查看 Master 状态
show master status;
show master status;
+—————–+———-+————–+——————+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+—————–+———-+————–+——————+
| mysqllog.000003 | 301 | test | mysql |
+—————–+———-+————–+——————+
1 row in set (0.00 sec)
查看 Slave 状态
show slave status \G;
mysql show slave status \G;
*************************** 1. row ***************************
Slave_IO_State: Reconnecting after a failed master event read
Master_Host: 10.224.194.239
Master_User: backup
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: mysqllog.000003
Read_Master_Log_Pos: 301
Relay_Log_File: mysqlgsb-relay-bin.000082
Relay_Log_Pos: 348
Relay_Master_Log_File: mysqllog.000003
Slave_IO_Running: No
Slave_SQL_Running: Yes
Replicate_Do_DB: test
Replicate_Ignore_DB: mysql
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: 301
Relay_Log_Space: 650
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: NULL
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
查看同步进程：
mysql show processlist \G;
*************************** 1. row ***************************
Id: 1
User: system user
Host:
db: NULL
Command: Connect
Time: 4186
State: Waiting for master to send event
Info: NULL
*************************** 2. row ***************************
Id: 2
User: system user
Host:
db: NULL
Command: Connect
Time: 3745
State: Has read all relay log; waiting for the slave I/O thread to update it
Info: NULL
*************************** 3. row ***************************
Id: 5
User: root
Host: mysqlpri.webex.com:28293
db: NULL
Command: Query
Time: 0
State: NULL
Info: show processlist
*************************** 4. row ***************************
Id: 6
User: backup
Host: 10.224.194.237:41729
db: NULL
Command: Binlog Dump
Time: 135
State: Has sent all binlog to slave; waiting for binlog to be updated
Info: NULL
4 rows in set (0.00 sec)
ERROR:
No query specified
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