MySQL多實例安裝開機自啟動服務配置過程

[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
#分別保存3個mysql密碼
[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 #查看哪個包提供倉庫 ：
@System匹配來源：提供 : libncurses.so.5
[root@clq ~]# dnf -y install ncurses-compat-libs （兼容庫）

[root@192 ~]# cat /etc/my.cnf 
[mysqld_multi]
mysqld = /usr/local/mysql/bin/mysqld_safe   #安全目錄
mysqladmin = /usr/local/mysql/bin/mysqladmin   #管理員登錄目錄
[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]                    #必須是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服務腳本復制到/etc/init.d/下
[root@mysql ~]# cp /usr/local/mysql/support-files/mysqld_multi.server /etc/init.d/mysqld_multi
#修改腳本，系統(tǒng)腳本啟動的時候會在新的終端重新加載加這一條會在bindir下找到mysqld_multi
basedir=/usr/local/mysql
bindir=/usr/local/mysql/bin
export PATH=$bindir:$PATH
systemctl daemon-reload 系統(tǒng)重新加載服務
開啟：
[root@mysql ~]# service mysqld_multi start 3306
[root@mysql ~]# service mysqld_multi start 3307
[root@mysql ~]# service mysqld_multi start 3308
自啟動：
[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                          *:*