MySQL 5.6主从同步配置案例分享

本文环境
主库：Redhat 6.5 x64 192.168.1.180 mysql-5.6.35
备库：Redhat 6.5 x64 192.168.1.181 mysql-5.6.35

一、常规配置方式一
1. mysql主服务器配置
增加如下配置：
# vi /etc/my.cnf

[mysqld]
log-bin = master-bin
log-bin-index = master-bin.index
binlog_format = mixed
server-id = 1

修改my.cnf后重启mysql
#/etc/init.d/mysqld restart
[root@tmaster bin]# /etc/init.d/mysqld restart
Shutting down MySQL.. [ OK ]
Starting MySQL. [ OK ]


[root@tmaster bin]# mysql -uroot -p
Enter password:
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 1
Server version: 5.6.35-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 master status;
+-------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+-------------------+----------+--------------+------------------+-------------------+
| master-bin.000002 | 2290 | | | |
+-------------------+----------+--------------+------------------+-------------------+

1 row in set (0.00 sec)

mysql>
2. 主服务器配置同步复制帐号

mysql>grant replication slave on *.* to 'repl'@'%' identified by '123456';
--刷新一下权限
mysql>flush privileges;

3. mysql从服务器配置

说明: 默认只要server-id不相同即可。
--增加如下配置：
# vi /etc/my.cnf

[mysqld]
log-bin = slave-bin
binlog_format = mixed
server-id = 11
relay-log = slave-relay-bin
relay-log-index = slave-relay-bin.index

配置说明: 不同步mysql库可以实现主从库有不同的帐号权限，经过测试，mysql5.6.29中只在从库中配置有效。

其它参数：
binlog-do-db = mydb 仅同步一个数据库
#replicate-ignore-db = mysql 忽略掉mysql库,该参数产生很多意外的同步问题，还是不使用。
replicate_wild_ignore_table = mysql.% 忽略掉mysql库

最终从库my.cnf内容如下：
###
log-bin = slave-bin
binlog_format = mixed
server-id = 11
relay-log = slave-relay-bin
relay-log-index = slave-relay-bin.index
binlog-do-db = mydb
replicate_wild_ignore_table = mysql.%

--从库mysql重启后方可生效
# /etc/init.d/mysqld restart
[root@tslave ~]# /etc/init.d/mysqld restart
Shutting down MySQL.. [ OK ]
Starting MySQL. [ OK ]


4. 测试示例

CREATE DATABASE mydb;
CREATE TABLE user (
id varchar(20) NOT NULL,
username varchar(20) NOT NULL,
password char(32) NOT NULL,
PRIMARY KEY (id)
) ;

INSERT INTO user VALUES ('1', 'koumm', '123456');
INSERT INTO user VALUES ('2', 'zhangsan', '123456');
INSERT INTO user VALUES ('3', 'lisi', '123456');
INSERT INTO user VALUES ('4', 'li2si', '123456');
INSERT INTO user VALUES ('5', 'abc', '123456');
INSERT INTO user VALUES ('6', 'tom', '123456');
INSERT INTO user VALUES ('7', 'jk', '123456');
INSERT INTO user VALUES ('8', 'xb', '123456');

5. 正常的主从配置过程
(1) 主库锁表

mysql> flush tables with read lock;
Query OK, 0 rows affected (0.00 sec)


mysql> show master status;
+-------------------+----------+--------------+------------------+-------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
+-------------------+----------+--------------+------------------+-------------------+
| master-bin.000002 | 2290 | | | |
+-------------------+----------+--------------+------------------+-------------------+


mysql> show master logs;
+-------------------+-----------+
| Log_name | File_size |
+-------------------+-----------+
| master-bin.000001 | 420 |
| master-bin.000002 | 2290 |
+-------------------+-----------+
2 rows in set (0.00 sec)




(2) 主库备份

[root@master ~]# mysqldump -uroot -p -B mydb >/mysql/backu/mydb.sql
说明：-B参数有建库语句。

(3) 主库解开锁表功能
mysql> unlock tables;
Query OK, 0 rows affected (0.00 sec)
mysql>

6. 从库导入数据库,输入密码后回车

[root@slave ~]# mysql -uroot -p </mysql/backup/mydb.sql
Enter password:

7. 从库配置同步过程
(1) 配置同步，手动执行同步参数，该配置会写入master.info文件中。

mysql> CHANGE MASTER TO
-> MASTER_HOST='192.168.1.180',
-> MASTER_PORT=3306,
-> MASTER_USER='repl',
-> MASTER_PASSWORD='123456',
-> MASTER_LOG_FILE='master-bin.000002',
-> MASTER_LOG_POS=2290;
Query OK, 0 rows affected, 2 warnings (0.02 sec)

(2) 启动从同步进程

mysql> start slave;
Query OK, 0 rows affected (0.01 sec)

mysql> show slave status\G;
*************************** 1. row ***************************
Slave_IO_State: Waiting for master to send event
Master_Host: 192.168.1.180
Master_User: repl
Master_Port: 3306
Connect_Retry: 60
Master_Log_File: master-bin.000002
Read_Master_Log_Pos: 2290
Relay_Log_File: slave-relay-bin.000002
Relay_Log_Pos: 284
Relay_Master_Log_File: master-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: mysql.%
Last_Errno: 0
Last_Error:
Skip_Counter: 0
Exec_Master_Log_Pos: 2290
Relay_Log_Space: 457
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: 7baedb0e-5ea0-11e8-8692-000c292185b2
Master_Info_File: /usr/local/mysql/data/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: 0
1 row in set (0.00 sec)

ERROR:
No query specified



#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
(3) 测试同步情况

# 主库插入一条记录

mysql> use mydb
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> show tables;
+----------------+
| Tables_in_mydb |
+----------------+
| user |
+----------------+
1 row in set (0.00 sec)

mysql> select * from user;
+----+----------+----------+
| id | username | password |
+----+----------+----------+
| 1 | koumm | 123456 |
| 2 | zhangsan | 123456 |
| 3 | lisi | 123456 |
| 4 | li2si | 123456 |
| 5 | abc | 123456 |
| 6 | tom | 123456 |
| 7 | jk | 123456 |
| 8 | xb | 123456 |
+----+----------+----------+
8 rows in set (0.00 sec)

mysql> insert into user values ('9','liang','654321');
Query OK, 1 row affected (0.01 sec)

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

mysql> select * from user;
+----+----------+----------+
| id | username | password |
+----+----------+----------+
| 1 | koumm | 123456 |
| 2 | zhangsan | 123456 |
| 3 | lisi | 123456 |
| 4 | li2si | 123456 |
| 5 | abc | 123456 |
| 6 | tom | 123456 |
| 7 | jk | 123456 |
| 8 | xb | 123456 |
| 9 | liang | 654321 |
+----+----------+----------+
9 rows in set (0.00 sec)


# 从库查询同步情况

mysql> use mydb
Database changed
mysql> select * from user;
+----+----------+----------+
| id | username | password |
+----+----------+----------+
| 1 | koumm | 123456 |
| 2 | zhangsan | 123456 |
| 3 | lisi | 123456 |
| 4 | li2si | 123456 |
| 5 | abc | 123456 |
| 6 | tom | 123456 |
| 7 | jk | 123456 |
| 8 | xb | 123456 |
| 9 | liang | 654321 |
+----+----------+----------+
9 rows in set (0.00 sec)




三、主从同步简单管理

1. 停止MYSQL同步

STOP SLAVE IO_THREAD; #停止IO进程
STOP SLAVE SQL_THREAD; #停止SQL进程
STOP SLAVE; #停止IO和SQL进程

2. 启动MYSQL同步

START SLAVE IO_THREAD; #启动IO进程
START SLAVE SQL_THREAD; #启动SQL进程
START SLAVE; #启动IO和SQL进程

3. 重置MYSQL同步

RESET SLAVE;
清除主从同步参数，它会删除master.info和relay-log.info文件，以及所有的中继日志，并启动一个新的中继日志。
适用重新再次配置一次从库的情况。

4. 查看MYSQL同步状态

SHOW SLAVE STATUS;

5. 临时跳过MYSQL同步错误

确保数据一致的情况下临时的跳过这个错误操作如下，有可能要多次。

STOP SLAVE;
SET GLOBAL SQL_SLAVE_SKIP_COUNTER=1;
START SLAVE;

# vi /etc/my.cnf

[mysqld]
#slave-skip-errors=1062,1053,1146 #跳过指定error no类型的错误
#slave-skip-errors=all #跳过所有错误



原来参考：https://www.linuxidc.com/Linux/2016-04/130729.htm


其它相关资料参考：

实现两个MySQL数据库之间的主从同步 http://www.linuxidc.com/Linux/2016-02/128100.htm

Linux环境中MySQL主从同步--添加新的从库 http://www.linuxidc.com/Linux/2015-08/122448.htm

通过 XtraBackup 实现不停机不锁表搭建MySQL主从同步 http://www.linuxidc.com/Linux/2015-08/121806.htm

MySQL主从同步配置记录 http://www.linuxidc.com/Linux/2015-07/119939.htm

Linux下MySQL数据库主从同步配置 http://www.linuxidc.com/Linux/2016-03/129138.htm