安装MySQL5.7

下载rpm包

wget https://cdn.mysql.com/archives/mysql-5.7/mysql-community-client-5.7.32-1.el7.x86_64.rpm
wget https://cdn.mysql.com/archives/mysql-5.7/mysql-community-common-5.7.32-1.el7.x86_64.rpm
wget https://cdn.mysql.com/archives/mysql-5.7/mysql-community-libs-5.7.32-1.el7.x86_64.rpm
wget https://cdn.mysql.com/archives/mysql-5.7/mysql-community-libs-compat-5.7.32-1.el7.x86_64.rpm
wget https://cdn.mysql.com/archives/mysql-5.7/mysql-community-server-5.7.32-1.el7.x86_64.rpm

安装

yum install -y mysql-community-*-5.7.32-1.el7.x86_64.rpm

启动mysql查看密码

cat /var/log/mysqld.log | grep password

登录mysql

mysql -u root -p

主从同步

关闭每台服务器的防火墙和selinux

systemctl disable --now firewalld
setenforce 0

主从服务器时间同步

主服务器使用本地时钟源

yum -y install ntp

修改ntp配置文件

vi /etc/ntp.conf

添加

restrict IP段 mask 子网段

restrict 43.248.0.0 mask 255.255.255.0#添加此行–自己设置主机的ip加子网掩码；这句是手动增加的，意思是指定的43.248.0.0–43.248.0.254的服务器段都可以使用此段服务器

开启ntpd

systemctl start ntpd

从服务器同步主服务器时间

vi /etc/ntp.conf

添加主服务器ip，并注释

server 主服务器ip

主服务器mysql配置

修改配置文件

vi /etc/my.conf

重启mysql

systemctl restart mysqld

给从服务器权限

grant replication slave on . to 'myslave'@'43.248.136.%' identified by '1234';

配置从服务器并重启

vi /etc/my.conf

登录mysql配置主从同步

change master to master_host='43.248.136.97',master_user='myslave',master_password='1234',master_log_file='master-bin.000001',master_log_pos=154;

start slave;

show slave status\G;

这样子mysql的主从同步就已经配置好了，大家缺乏机器练手的话可以去cnaaa看看！