LINUX - Configuring multiple instance without using a standalone database.

[Jean-Claude DOLE]

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
[e-mail] - 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/[e-mail]
└─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
[e-mail] - 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:~ #
----------------------------------------

Any help is welcome.

Thank you for helping
___________________________________________________________________________________________
SAMBA-LDAP PDC server - opensuse 12.3 KDE - MYSQL 5.6 -- asus R900V desktop 12.3 KDE & WINXP on Virtualbox -- HP DV9350 desktop 12.3 KDE -- acer aspire 7736g win 7 pro - scanner EPSON V500 - Brother HL2150N - Samsung CLP-325W