1.mkdir -p /data/330{7,8,9}/data 2.生成配置文件 cat >> /data/3307/my.cnf << EOF [mysqld] basedir=/app/mysql datadir=/data/3307/data socket=/data/3307/mysql.sock log_error=/data/3307/mysql.log port=3307 server_id=7 log_bin=/data/3307/mysql-bin EOF cat >> /data/3308/my.cnf << EOF [mysqld] basedir=/app/mysql datadir=/data/3308/data socket=/data/3308/mysql.sock log_error=/data/3308/mysql.log port=3308 server_id=8 log_bin=/data/3308/mysql-bin EOF cat >> /data/3309/my.cnf << EOF [mysqld] basedir=/app/mysql datadir=/data/3309/data socket=/data/3309/mysql.sock log_error=/data/3309/mysql.log port=3309 server_id=9 log_bin=/data/3309/mysql-bin EOF 3.初始化数据 注意：初始化的时候会读取/etc/my.cnf 所以先把它挪走 mv /etc/my.cnf /etc/my.cnf.bak mysqld --initialize-insecure --user=mysql --basedir=/app/mysql --datadir=/data/3307/data mysqld --initialize-insecure --user=mysql --basedir=/app/mysql --datadir=/data/3308/data mysqld --initialize-insecure --user=mysql --basedir=/app/mysql --datadir=/data/3309/data 修改配置 cd /etc/systemd/system cp mysqld.service mysqld3307.service cp mysqld.service mysqld3308.service cp mysqld.service mysqld3309.service vim mysqld3307.service vim mysqld3308.service vim mysqld3309.service 修改一下倒数第二句，修改加载的默认配置文件 ExecStart=/app/mysql/bin/mysqld --defaults-file=/data/3307/my.cnf ExecStart=/app/mysql/bin/mysqld --defaults-file=/data/3308/my.cnf ExecStart=/app/mysql/bin/mysqld --defaults-file=/data/3309/my.cnf 4.授权 chown -R mysql.mysql /data/* 启动 systemctl start mysqld3307.service systemctl start mysqld3308.service systemctl start mysqld3309.service 自启动 systemctl enable mysqld3307.service systemctl enable mysqld3308.service systemctl enable mysqld3309.service 5.验证多实例 netstat -lnp|grep 330 mysql -S /data/3307/mysql.sock -e "select @@server_id" mysql -S /data/3308/mysql.sock -e "select @@server_id" mysql -S /data/3309/mysql.sock -e "select @@server_id" 把配置文件弄回来 mv /etc/my.cnf.bak /etc/my.cnf
这就是多实例的搭建