1、rpm安装
wget https://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm

rpm -ivh mysql57-community-release-el7-9.noarch.rpm

yum install mysql-community-server

安装如下：
mysql-community-libs                           x86_64                    5.7.17-1.el7                     mysql57-community                    2.1 M
mysql-community-libs-compat                    x86_64                    5.7.17-1.el7                     mysql57-community                    2.0 M
mysql-community-server                         x86_64                    5.7.17-1.el7                     mysql57-community                    162 M
mysql-community-client                         x86_64                    5.7.17-1.el7                     mysql57-community                     24 M
mysql-community-common                         x86_64                    5.7.17-1.el7                     mysql57-community                    271 k

修改配置文件 /etc/my.cnf

2、systemctl启动mysql
systemctl start mysqld
systemctl status mysqld

查看 /var/log/mysqld.log 启动日志

3、systemctl设置开机启动
systemctl enable mysqld
systemctl daemon-reload

3、修改mysql root密码
grep 'temporary password' /var/log/mysqld.log

ALTER USER 'root'@'localhost' IDENTIFIED BY 'mypasswd';

创建新用户并授权
CREATE USER 'mysql_user'@'%' IDENTIFIED BY 'mypasswd';

GRANT ALL ON *.* TO 'mysql_user'@'%';

flush privileges;

配置文件：/etc/my.cnf
日志文件：/var/log/mysqld.log
服务启动脚本：/usr/lib/systemd/system/mysqld.service
socket文件：/var/run/mysqld/mysqld.pid


主从配置:
1. 主服务器创建用于同步复制的用户
GRANT REPLICATION SLAVE ON *.* to 'myusername'@'%';

2. 主服务器dump数据, 从服务器导入执行.

3. 重新设置主从同步;
Master: flush tables with read lock;
Master: show master status;
Slave: stop slave;
Slave: change master to master_host='172.21.250.165',master_user='buyao',master_password='buyao#!#303132MYSQLbuyao',master_log_file='binlog.000004',master_log_pos=1947;
Slave: show slave status;
Slave: start slave;
Master: unlock tables;

查看binlog内容
mysqlbinlog --no-defaults --base64-output=decode-rows -v binlog.000001