Monit configuration on archlinux (mysql)

Question

This config lines should work ok on an archlinux system?
    check process mysql with pidfile /var/run/mysqld/mysqld.pid
       group database
       start program = "/etc/rc.d/mysqld start"
       stop program = "/etc/rc.d/mysqld stop"
       if failed host 127.0.0.1 port 3306 protocol mysql then restart
       if 5 restarts within 5 cycles then timeout
       depends on mysql_bin
       depends on mysql_rc
Those "depends" lines are needed?
edit: at least the last one looks like not "Mar 20 23:01:20 localhost monit: monit: Error: Depend service 'mysql_rc' is not defined in the control file"... lol
any idea?
edit2: and the previous neither, lol "Mar 20 23:04:56 localhost monit: monit: Error: Depend service 'mysql_bin' is not defined in the control file"
edit3: without those depends it runs... then I tried killing mysqld... but it tried to restart it 5 times without luck (I have received the email alert "Description: service restarted 5 times within 5 cycles(s) - unmonitor")
Last edited by luuuciano (2013-03-21 03:23:05)

Answer 1

Just read something about monit and arch and you'll be good
First, "depends" defines... well, dependencies between monit services. So in order to run mysql as shown, you have to provide these services (probably of "check file" type) or just assume they're always OK and remove dependecy check.
Then, start|stop program in your case use sysvinit style scripts, while you probably have systemd (unless you managed to avoid this monstrosity). So, replace "/etc/rc.d/mysql..." with corresponding systemctl invocation.
I don't know if mysql under systemd creates pidfile; if not, use "matching ..." or even "check host" -- as systemd takes care of process supervision, just checking connectivity will be enough.