//下载（略），解压
[root@slave ~]# tar -xf mysql-5.7.31-linux-glibc2.12-x86_64.tar.gz
[root@slave ~]# yum -y install libncurses*
//创建数据库文件夹
[root@slave ~]# mkdir -p /opt/data/{3306,3307}
//创建根用户mysql
[root@slave ~]# useradd -r -s /usr/sbin/nologin mysql
//将mysql解压文件夹移动到指定目录
[root@slave ~]# mv mysql-5.7.31-linux-glibc2.12-x86_64 /usr/local/
//创建软链接
[root@slave ~]# ln -s /usr/local/mysql-5.7.31-linux-glibc2.12-x86_64/ /usr/local/mysql
[root@slave ~]# ln -s /usr/local/mysql/include/ /usr/local/include/mysql
//增加环境变量
[root@slave ~]# echo 'export PATH=/usr/local/mysql/bin:$PATH'> /etc/profile.d/mysql.sh
[root@slave ~]# . /etc/profile.d/mysql.sh
[root@slave ~]# echo $PATH
/usr/local/mysql/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
//增加帮助文档和库文件匹配路径
[root@slave ~]# vim /etc/man_db.conf
MANDATORY_MANPATH /usr/local/mysql/man
[root@slave ~]# vim /etc/ld.so.conf.d/mysql.conf
/usr/local/mysql/lib
[root@slave ~]# ldconfig
//初始化两个实例机，保存临时密码
[root@slave ~]# mysqld --initialize --basedir=/opt/data/3306 --user=mysql
[root@slave ~]# echo 'XJth1eIC-EXa'>passwd3306
[root@slave ~]# mysqld --initialize --basedir=/opt/data/3307 --user=mysql
[root@slave ~]# echo '*g5(Rij+j1wV'>passwd3307
//安装perl命令
[root@slave ~]# yum -y install perl
Complete!
//配置多实例文件
[root@slave ~]# vim /etc/my.cnf
...
[mysqld_multi]
mysqld = /usr/local/mysql/bin/mysqld_safe
mysqladmin = /usr/local/mysql/bin/mysqladmin
[mysqld3306]
datadir = /opt/data/3306
port = 3306
socket = /tmp/mysql3306.sock
pid-file = /opt/data/3306/mysql_3306.pid
log-error=/var/log/3306.log
[mysqld3307]
datadir = /opt/data/3307
port = 3307
socket = /tmp/mysql3307.sock
pid-file = /opt/data/3307/mysql_3306.pid
log-error=/var/log/3307.log
//启动服务3306
[root@slave ~]# mysqld_multi start 3306
Installing new database in /opt/data/3306
...
2021-01-03T08:26:40.212207Z 1 [Note] A temporary password is generated for root@localhost: XJth1eIC-EXa
//启动服务3307
[root@slave ~]# mysqld_multi start 3307
Installing new database in /opt/data/3307
...
2021-01-03T08:27:06.142304Z 1 [Note] A temporary password is generated for root@localhost: /jsSxslpl0-t
//查看监听端口
[root@slave ~]# ss -antl
State Recv-Q Send-Q Local Address:Port Peer Address:Port
LISTEN 0 128 0.0.0.0:22 0.0.0.0:*
LISTEN 0 80 *:3306 *:*
LISTEN 0 80 *:3307 *:*
LISTEN 0 128 [::]:22 [::]:*
//登录重置密码
//3307端
[root@slave ~]# mysql -uroot -p'/jsSxslpl0-t' -S /tmp/mysql3307.sock
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 2
Server version: 5.7.31
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql> set password=password('123456');
Query OK, 0 rows affected, 1 warning (0.00 sec)
//3306端
[root@slave ~]# mysql -uroot -p'XJth1eIC-EXa' -S /tmp/mysql3306.sock
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 9
Server version: 5.7.31
Copyright (c) 2000, 2020, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql> set password=password('123456');
Query OK, 0 rows affected, 1 warning (0.01 sec)