MySQL多实例安装开机自启动服务配置过程

[root@clq ~]# mkdir /opt/data/{3306,3307,3308} -p
[root@clq ~]# chown mysql.mysql /opt/data/*

[root@192 ~]# mysqld --initialize --datadir=/opt/data/3306 --user=mysql
[root@192 ~]# mysqld --initialize --datadir=/opt/data/3307 --user=mysql
[root@192 ~]# mysqld --initialize --datadir=/opt/data/3308 --user=mysql
#分别保存3个mysql密码
[root@192 ~]# echo 'wxa+r_N6ooYu' > 3306
[root@192 ~]# echo 'faiuehfaowh' > 3307
[root@192 ~]# echo 'fuahfu' > 3308

[root@clq ~]# yum -y install perl

[root@clq ~]# dnf whatprovides libncurses.so.5
ncurses-compat-libs-6.1-7.20180224.el8.i686 : Ncurses compatibility libraries #查看哪个包提供仓库 ：
@System匹配来源：提供 : libncurses.so.5
[root@clq ~]# dnf -y install ncurses-compat-libs （兼容库）

[root@192 ~]# cat /etc/my.cnf 
[mysqld_multi]
mysqld = /usr/local/mysql/bin/mysqld_safe   #安全目录
mysqladmin = /usr/local/mysql/bin/mysqladmin   #管理员登录目录
[mysqld3306]
datadir = /opt/data/3306
port = 3306
socket = /tmp/mysql3306.sock
pid-file = /opt/data/3306/mysql3306.pid
log-error = /var/log/3306.log
[mysqld3307]                    #必须是mysqld3307 不是mysql3307
datadir = /opt/data/3307
port = 3307
socket = /tmp/mysql3307.sock
pid-file = /opt/data/3307/mysql3307.pid
log-error = /var/log/3307.log
[mysqld3308]               
datadir = /opt/data/3308
port = 3308
socket = /tmp/mysql3308.sock
pid-file = /opt/data/3308/mysql3308.pid
log-error = /var/log/3308.log

#mysqld_multi服务脚本复制到/etc/init.d/下
[root@mysql ~]# cp /usr/local/mysql/support-files/mysqld_multi.server /etc/init.d/mysqld_multi
#修改脚本，系统脚本启动的时候会在新的终端重新加载加这一条会在bindir下找到mysqld_multi
basedir=/usr/local/mysql
bindir=/usr/local/mysql/bin
export PATH=$bindir:$PATH
systemctl daemon-reload 系统重新加载服务
开启：
[root@mysql ~]# service mysqld_multi start 3306
[root@mysql ~]# service mysqld_multi start 3307
[root@mysql ~]# service mysqld_multi start 3308
自启动：
[root@mysql ~]# chkconfig mysqld_multi on
[root@mysql ~]#reboot
[root@mysql ~]# ss -antl
State         Recv-Q        Send-Q               Local Address:Port               Peer Address:Port        Process                               
LISTEN        0             80                               *:3306                          *:*                          
LISTEN        0             80                               *:3307                          *:*                          
LISTEN        0             80                               *:3308                          *:*