Munin & Monit

[Hans]

I have setup Munin & Monit on my Debian system according Falko's How to and i have a question about this.

Before i did this it was never necessary to restart Postfix.
Since i have installed Munin & Monit, every night at 0:00 hour Monit restarts Postfix, so a new PID-file is created.
What is the reason for this?

Hans

[Norman]

Might it be possible that munin is bugged so it doesnt recognize a new day?
I doubt that however.

Another reason might simply be that the timeout is set very low in /etc/monitrc so it restarts postfix when there's a lot of cron-activity around midnight.

Check your monit log for more info and then change your config accordingly to wait longer.

[Hans]

check process proftpd with pidfile /var/run/proftpd.pid
start program = "/etc/init.d/proftpd start"
stop program = "/etc/init.d/proftpd stop"
if failed port 21 protocol ftp then restart
if 5 restarts within 5 cycles then timeout

check process sshd with pidfile /var/run/sshd.pid
start program "/etc/init.d/ssh start"
stop program "/etc/init.d/ssh stop"
if failed port 22 protocol ssh then restart
if 5 restarts within 5 cycles then timeout

check process mysql with pidfile /var/run/mysqld/mysqld.pid
group database
start program = "/etc/init.d/mysql start"
stop program = "/etc/init.d/mysql stop"
if failed host 127.0.0.1 port 3306 then restart
if 5 restarts within 5 cycles then timeout

check process apache with pidfile /var/run/apache2.pid
group www
start program = "/etc/init.d/apache2 start"
stop program = "/etc/init.d/apache2 stop"
if failed host www.myhostingcompany.tld port 80 protocol http
and request "/monit/token" then restart
if cpu is greater than 60% for 2 cycles then alert
if cpu > 80% for 5 cycles then restart
if totalmem > 500 MB for 5 cycles then restart
if children > 250 then restart
if loadavg(5min) greater than 10 for 8 cycles then stop
if 3 restarts within 5 cycles then timeout

check process postfix with pidfile /var/spool/postfix/pid/master.pid
group mail
start program = "/etc/init.d/postfix start"
stop program = "/etc/init.d/postfix stop"
if failed port 25 protocol smtp then restart
if 5 restarts within 5 cycles then timeout

Seems to be ok, i guess or do you have any sugestions?

Hans

[falko]

Originally Posted by Hans

Before i did this it was never necessary to restart Postfix.
Since i have installed Munin & Monit, every night at 0:00 hour Monit restarts Postfix, so a new PID-file is created.

It's not monit who restarts Postfix, it's ISPConfig (in order to generate thetraffic statistics). monit just sends you a notification that Postfix has been restarted.

[Hans]

Falko,

So with other words... restarting Postfix at night by ISPConfig is normal, which means that i can expect this every day?

(My box is full of surprises)

[falko]

Originally Posted by Hans

So with other words... restarting Postfix at night by ISPConfig is normal, which means that i can expect this every day?

Yes, that's right.

[nenad]

What exactly "10" in this statement means:

if loadavg(5min) greater than 10 for 8 cycles then stop

[falko]

It's the 5 min. load average. When you run

uptime

, it's the value in the middle:

13:37:41 up 50 days, 13:43,  1 user,  load average: 0.10, 0.12, 0.05