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！