[Linux] MySQL 主从配置

master	192.168.1.153
slave	192.168.1.154
os	rhel 7.2

1、修改 master

# vi /etc/my.cnf

[mysqld] log-bin=mysql-bin server-id=153

# systemctl restart mysqld  # 重启

2、修改 slave

# vi /etc/my.cnf

[mysqld] log-bin=mysql-bin server-id=154

# systemctl restart mysqld  # 重启

3、master 建立账户并授权slave

mysql> GRANT REPLICATION SLAVE ON *.* to 'mysync'@'192.168.1.%' identified by 'Ma991218##';  # 新建 mysync 用户

mysql> show master status;        # 查看 master 状态，出来的结果在 slave 有用

+------------------+----------+--------------+------------------+-------------------+ | File             | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set | +------------------+----------+--------------+------------------+-------------------+ | mysql-bin.000001 |      449 |              |                  |                   | +------------------+----------+--------------+------------------+-------------------+ 1 row in set (0.00 sec)

4、配置 slave

mysql> change master to master_host='192.168.1.153',master_user='mysync',master_password='Ma991218##',master_log_file='mysql-bin.000001',master_log_pos=449;

mysql> start slave;          # 开启从服务器复制功能

mysql> show slave status\G           #  查看 slave 状态，要看到两个 YES

*************************** 1. row ***************************                Slave_IO_State: Connecting to master                   Master_Host: 192.168.1.153                   Master_User: mysync                   Master_Port: 3306                 Connect_Retry: 60               Master_Log_File: mysql-bin.000001           Read_Master_Log_Pos: 449                Relay_Log_File: mysql-02-relay-bin.000001                 Relay_Log_Pos: 4         Relay_Master_Log_File: mysql-bin.000001              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: 449               Relay_Log_Space: 154               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: 1130                 Last_IO_Error: error connecting to master '[email protected]:3306' - retry-time: 60  retries: 1                Last_SQL_Errno: 0                Last_SQL_Error:   Replicate_Ignore_Server_Ids:              Master_Server_Id: 0                   Master_UUID:              Master_Info_File: /var/lib/mysql/master.info                     SQL_Delay: 0           SQL_Remaining_Delay: NULL       Slave_SQL_Running_State: Slave has read all relay log; waiting for more updates            Master_Retry_Count: 86400                   Master_Bind:       Last_IO_Error_Timestamp: 171010 08:17:56      Last_SQL_Error_Timestamp:                Master_SSL_Crl:            Master_SSL_Crlpath:            Retrieved_Gtid_Set:             Executed_Gtid_Set:                 Auto_Position: 0          Replicate_Rewrite_DB:                  Channel_Name:            Master_TLS_Version: 1 row in set (0.00 sec)

5、测试

# master 操作，新建库、表

mysql>create database ceshi

mysql> use ceshi

mysql> create table student(id int(10) primary key auto_increment,name varchar(30),agetinyint(2));

mysql> insert into student (id,name,age) value(321281,"mzh",18);

# slave 操作，查看有无同步

mysql> show databases;

+--------------------+ | Database           | +--------------------+ | information_schema | | ceshi              | | mysql              | | performance_schema | | sys                | +--------------------+ 5 rows in set (0.00 sec)

mysql> use ceshi

mysql> show tables;

+-----------------+ | Tables_in_ceshi | +-----------------+ | cs              | | student         | +-----------------+ 2 rows in set (0.00 sec)

mysql> select * from student;    # 已同步

+--------+------+------+ | id     | name | age  | +--------+------+------+ | 321281 | mzh  |   18 | +--------+------+------+ 1 row in set (0.01 sec)

# 完工