安装的数据是mysql5.7社区版本yum安装,官网有下载地址

wget https://repo.mysql.com//mysql57-community-release-el7-10.noarch.rpm

注意事项: 防火墙,命令引号.

主服务器 

[root@localhost opt]# egrep -v "^$|#" /etc/my.cnf 红色部分为添加

[mysqld]

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

symbolic-links=0

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

server-id=1                      

log-bin=mysql-bin

登陆数据库

systemctl start mysqld.service

grep ‘temporary password‘ /var/log/mysqld.log #查看临时密码

mysql -uroot -p

修改root密码

set global validate_password_policy=0;   #取消复杂密码设置

alter user ‘root‘@‘localhost‘ identified by ‘123‘;

开始创建用户

GRANT REPLICATION SLAVE ON *.* TO ‘repl‘@‘192.168.1.%‘ IDENTIFIED BY ‘admin123456‘;  

查看master日志

mysql>quit

mysql>SHOW MASTER STATUS;

+------------------+----------+--------------+------------------+-------------------+

| File         | Position | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |

+------------------+----------+--------------+------------------+-------------------+

| mysql-bin.000001 |    154 |         |             |             |

+------------------+----------+--------------+------------------+-------------------+

1 row in set (0.00 sec)

从配置

[root@localhost ~]# egrep -v "^$|#" /etc/my.cnf

[mysqld]

datadir=/var/lib/mysql

socket=/var/lib/mysql/mysql.sock

symbolic-links=0

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

server-id=2

登陆数据库5.7版本

CHANGE MASTER TO  

MASTER_HOST=‘192.168.1.200‘,
MASTER_PORT=3306,

MASTER_USER=‘repl‘,  

MASTER_PASSWORD=‘admin123456‘,  

MASTER_LOG_FILE=‘mysql-bin.000001‘,  主配置日志

MASTER_LOG_POS=154;   主配置日志

启动

start slave;

stop slave;

查看是否连接成功. 红色部分一定要为yes.

mysql> show slave status \G

*************************** 1. row ***************************

              Slave_IO_State: Waiting for master to send event

                 Master_Host: 192.168.1.200

                 Master_User: repl

                 Master_Port: 3306

               Connect_Retry: 60

             Master_Log_File: mysql-bin.000001

         Read_Master_Log_Pos: 316

              Relay_Log_File: localhost-relay-bin.000002

               Relay_Log_Pos: 482

       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: 316

             Relay_Log_Space: 693

             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: 200

                 Master_UUID: 706337e4-1ebb-11e7-a606-000c2987fd49

            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)

Mysql5.7主从复制配置文档