Mysql5.7主从复制配置

准备两台服务器,一主一从。

IP	服务ID	角色
192.168.1.110	110	master
192.168.1.111	111	slave

Mysql主从软件版本尽量保持一致

配置主数据

修改配置文件

> vim /etc/my.cnf
[mysqld]

basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
#要给从库同步的库
binlog-do-db=rumenz

#不给从机同步的库(多个写多行)
binlog-ignore-db=mysql
binlog-ignore-db=information_schema
binlog-ifnore-db=performance_schema
binlog-ignore-db=sys
log-error=/usr/local/mysql/data/error.log
#自动清理 7 天前的log文件,可根据需要修改

expire_logs_days=7
#启动binlog
log-bin=mysql-bin
服务器唯一ID，一般取IP最后一段,必填
server-id=110

重启Mysql

> systemctl restart mysql

建立账户并授权slave

> grant file,replication slave on *.* to 'slave'@'%' identified by '123456';
> flush privileges;
> show master status;

img

配置从库

将主库的所有数据拷贝一份,保证主从数据一致

修改my.cnf配置文件

> vim /etc.my.cnf
[mysqld]
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
server-id=111
#加上以下参数可以避免更新不及时，SLAVE 重启后导致的主从复制出错。
read_only=1
master_info_repository=TABLE
relay_log_info_repository=TABLE
log-error=/usr/local/mysql/data/error.log

在从库的服务器上关联主服务器

> stop slave;
> change master to 
> master_host='192.168.1.110',
> master_port=3306,
> master_user='slave', #备份用户名
> master_password='123456',#密码
> master_log_file='mysql3306-bin.000001', #上面截图，且要与master的参数一致
> master_log_pos=1155;  #上面截图，且要与master的参数一致
> start slave;

master_log_file和master_log_pos的值要和查看主库的内容要一致,一个指的是二进制文件，一个指的是二进制日志的位置

查看从库状态

show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: localhost
                  Master_User: slave
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql3306-bin.000001
          Read_Master_Log_Pos: 604
               Relay_Log_File: BOTCHNFOSDAF06-relay-bin.000002
                Relay_Log_Pos: 324
        Relay_Master_Log_File: mysql3306-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: 604
              Relay_Log_Space: 540
              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: 110
                  Master_UUID: b7f6033a-c74e-11eb-a1ab-000c291b6073
             Master_Info_File: mysql.slave_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: 
     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)