去了mysql论坛看了看，发现形式好像有变化：

http://forums.mysql.com/read.php?10,627016,627016#msg-627016

LINUX - Configuring multiple instance without using a standalone database.

Hello.

I would like to setup as many instance as necessary so I can stop only one database without stopping everything. So I have not configured [mysqld], and try to use only mysqld_multi.

Service File ( in /etc/systemd/system/mysqld@.service )

---------------

[Unit]

Description=MySQL Multi Server for instance %i

After=syslog.target

After=network.target

[Service]

User=mysql

Group=mysql

Type=forking

ExecStart=/usr/bin/mysqld_multi --defaults-file=/etc/mysql/cfg_%i.cnf --log=/var/log/mysql/mysql_multi.log start %i

ExecStop=/usr/bin/mysqld_multi --log=/var/log/mysql/mysql_multi.log stop %i

Restart=always

RestartSec=5

PrivateTmp=true

[Install]

WantedBy=multi-user.target

-----------------------------------------

I have put the configuration file in /etc/mysql/cfg_1.cnf for my first instance.

I have put the configuration file in /etc/mysql/cfg_2.cnf for my second instance.

Here config file for instance 2 :

-------------------------------------

[mysqld1]

port = 63332

socket = /bdd/bd_2/sock/postfix.sock

pid-file = /bdd/bd_2/sock/postfix.pid

user = postfix

general_log = 1

general_log_file = /var/log/mysql/postfix/postfix.log

log-error = /var/log/mysql/postfix/postfix_error.log

log-warnings = 6

datadir = /bdd/bd_2/postfix

symbolic-links        = 0

-----------------------------------

here is the general configuration file ( /etc/my.cnf )

------------------------------------

[client]

port = 3306

socket = /bdd/bd_1/sock/mysql_cli.sock

[mysqld_multi]

mysqld = /usr/bin/mysqld_safe

mysqladmin = /usr/bin/mysqladmin

log = /var/log/mysql/mysqld_multi.log

!includedir /etc/my.cnf.d

---------------------------------------

here are screen logs :

---------------------------------------

linux-my-server-yast2:~ # systemctl start mysqld@1

linux-my-server-yast2:~ # systemctl status mysqld@1

mysqld@1.service - MySQL Multi Server for instance 1

Loaded: loaded (/etc/systemd/system/mysqld@.service; enabled)

Active: active (running) since Wed 2015-01-21 19:45:21 CET; 2s ago

Process: 5178 ExecStart=/usr/bin/mysqld_multi --defaults-file=/etc/mysql/cfg_%i.cnf --log=/var/log/mysql/mysql_multi.log --verbose start %i (code=exited, status=0/SUCCESS)

Main PID: 5184 (mysqld)

CGroup: /system.slice/system-mysqld.slice/mysqld@1.service

└─5184 /usr/sbin/mysqld --port=63331 --datadir=/bdd/bd_1/mysql --socket=/bdd/bd_1/sock/mysql.sock --pid-file=/bdd/bd_1/sock/mysql.pi...

Jan 21 19:45:21 linux-my-server-yast2 systemd[1]: Started MySQL Multi Server for instance 1.

linux-my-server-yast2:~ # systemctl start mysqld@2

linux-my-server-yast2:~ # systemctl status mysqld@2

mysqld@2.service - MySQL Multi Server for instance 2

Loaded: loaded (/etc/systemd/system/mysqld@.service; enabled)

Active: inactive (dead) since Wed 2015-01-21 19:45:31 CET; 3s ago

Process: 5216 ExecStop=/usr/bin/mysqld_multi --log=/var/log/mysql/mysql_multi.log stop %i (code=exited, status=0/SUCCESS)

Process: 5212 ExecStart=/usr/bin/mysqld_multi --defaults-file=/etc/mysql/cfg_%i.cnf --log=/var/log/mysql/mysql_multi.log --verbose start %i (code=exited, status=0/SUCCESS)

Jan 21 19:45:31 linux-my-server-yast2 systemd[1]: Started MySQL Multi Server for instance 2.

linux-my-server-yast2:~ #