mysql-5.7的主从配置

mysql的主从配置

下载最新mysql 的yum源

1、wget https://dev.mysql.com/get/mysql57-community-release-el6-11.noarch.rpm

安装最新mysql

rpm -ivh mysql57-community-release-el6-11.noarch.rpm
yum -y install mysql-server  

启动mysql数据库

service mysqld start

提示：由于5.7初始化会自动生成密码  ：

cat /var/log/mysqld.log

2018-03-24T13:19:50.925206Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2018-03-24T13:19:54.106661Z 0 [Warning] InnoDB: New log files created, LSN=45790
2018-03-24T13:19:54.588874Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2018-03-24T13:19:54.805786Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 0abbeb4b-2f66-11e8-81f3-000c292c7cea.
2018-03-24T13:19:54.810834Z 0 [Warning] Gtid table is not ready to be used. Table ‘mysql.gtid_executed‘ cannot be opened.
2018-03-24T13:19:54.841042Z 1 [Note] A temporary password is generated for [email protected]: :kufY//k0zk&  (这是随机生成的密码)

登录mysql数据库并修改密码：

mysql    -uroot  -p
ALTER USER ‘root‘@‘localhost‘ IDENTIFIED BY ‘[email protected]‘; 

1.配置master的配置文件my.cnf

#打开日志(主机需要打开)
log-bin=mysql-bin
##服务器id（这个是唯一的）
server-id=1
#给从机同步的库(可以写多个库)
binlog-do-db=mydb
binlog-do-db=mydb2
binlog-do-db=test

#自动清理5天前的log文件
expire_logs_days=5

2.修改从服务器的从数据库slave   /etc/my.cnf配置

#服务器id
server-id=2
##要从主机同步的库
replicate-do-db=mydb
replicate-do-db=mydb2
replicate-do-db=test

3.修改之后，重启MySQL主数据库和MySQL从数据库的服务

service mysqld restart

4.配置主服务器的主数据库

主数据库授权同步账户

mysql> GRANT REPLICATION SLAVE ON *.* TO ‘root‘@‘192.168.10.115‘ IDENTIFIED BY ‘[email protected]‘;
Query OK, 0 rows affected, 1 warning (0.01 sec)

刷新权限

FLUSH PRIVILEGES;

查看主服务状态

mysql> show master status ;
+------------------+----------+-----------------+------------------+-------------------+
| File             | Position | Binlog_Do_DB    | Binlog_Ignore_DB | Executed_Gtid_Set |
+------------------+----------+-----------------+------------------+-------------------+
| mysql-bin.000001 |      602 | mydb,mydb2,test |                  |                   |
+------------------+----------+-----------------+------------------+-------------------+
1 row in set (0.00 sec)

5.配置从服务器的从数据库

mysql> CHANGE MASTER TO MASTER_HOST=‘192.168.10.116‘,    -> MASTER_USER=‘root‘,    -> MASTER_PASSWORD=‘[email protected]‘,    -> MASTER_LOG_FILE=‘mysql-bin.000001‘,\ （这个都是根据主服务器查询出的结果）
    -> MASTER_LOG_POS=602;（就是主服务器 show master status；）
Query OK, 0 rows affected, 2 warnings (0.13 sec)

开启SLAVE同步

start slave;　

查看下slave状态

show slave status \G;

mysql> show slave status \G;
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 192.168.10.116
                  Master_User: root
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 602
               Relay_Log_File: localhost-relay-bin.000002
                Relay_Log_Pos: 320
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Yes （这个位置显示yes）
            Slave_SQL_Running: Yes （这个位置也显示yes表示主从复制配置成功）
              Replicate_Do_DB: mydb,mydb2,test
          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: 602
              Relay_Log_Space: 531
              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: 0abbeb4b-2f66-11e8-81f3-000c292c7cea
             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:
     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)

当Slave_IO_Running和Slave_SQL_Running都为Yes，才说明主从复制成功

6.停止SLAVE同步

stop slave;

7.撤销已经赋予给MySQL同步账户的权限

revoke 跟 grant 的语法差不多，只需要把关键字 “to” 换成 “from” 即可：

GRANT REPLICATION SLAVE ON *.* TO ‘root‘@‘192.168.10.116‘ IDENTIFIED BY ‘XXXXXX‘;

REVOKE REPLICATION SLAVE ON *.* FROM ‘root‘@‘192.168.10.116‘;

8.授权账号可以远程登录

GRANT ALL ON *.* TO  用户名@‘%‘ IDENTIFIED BY ‘密码‘ WITH GRANT OPTION;

原文地址：https://www.cnblogs.com/xu743876685/p/8641772.html