Re: Monit dependency problem (bug?)

[Rory Toma]

What is your cycle time? Is it 30 sec? If it is, try increasing it to 1 minute.

On 12/6/11 9:12 AM, drich wrote:

As I mentioned in an earlier e-mail, I'm trying to get monit to watch a group of processes so it can start/stop ospfd for an anycast high availability application. However, in doing this I'm seeing some odd behaviour that doesn't match what I expect -- is this a bug?

In the scenario below, why is it ever trying to start ospfd? If apache is down, shouldn't ospfd stay down until apache comes back up or is monitored again after being unmonitored? It does end up in the correct state at the end, but not without restarting and stopping ospfd twice in the meantime.

As an example, I have the following configured:

check process apache with pidfile /var/run/httpd.pid
  start program = "/etc/init.d/httpd start"
  stop program  = "/etc/init.d/httpd stop"
  if failed host localhost port 80 protocol http
     and request "/" then restart
  if 2 restarts within 2 cycles then stop

check process ospfd with pidfile /var/run/quagga/ospfd.pid
  start program = "/etc/init.d/ospfd start"
  stop program  = "/etc/init.d/ospfd stop"
  depends on apache

If I make it so that apache cannot run (by removing execute permissions on /usr/sbin/httpd) and then kill it, I see the following in the monit logs:

Dec  6 08:47:39 tecate monit[9988]: 'apache' process is not running
Dec  6 08:47:39 tecate monit[9988]: 'apache' trying to restart
Dec  6 08:47:39 tecate monit[9988]: 'ospfd' stop: /etc/init.d/ospfd
Dec  6 08:47:39 tecate monit[9988]: 'apache' start: /etc/init.d/httpd
Dec  6 08:47:40 tecate monit[9988]: 'ospfd' unmonitor on user request
Dec  6 08:47:40 tecate monit[9988]: monit daemon at 9988 awakened
Dec  6 08:48:09 tecate monit[9988]: 'apache' failed to start
Dec  6 08:48:09 tecate monit[9988]: 'ospfd' start: /etc/init.d/ospfd
Dec  6 08:48:09 tecate monit[9988]: 'ospfd' unmonitor action done
Dec  6 08:48:09 tecate monit[9988]: Awakened by User defined signal 1
Dec  6 08:48:09 tecate monit[9988]: 'apache' process is not running
Dec  6 08:48:09 tecate monit[9988]: 'apache' trying to restart
Dec  6 08:48:09 tecate monit[9988]: 'ospfd' stop: /etc/init.d/ospfd
Dec  6 08:48:09 tecate monit[9988]: 'apache' start: /etc/init.d/httpd
Dec  6 08:48:09 tecate monit[9988]: 'ospfd' unmonitor on user request
Dec  6 08:48:09 tecate monit[9988]: monit daemon at 9988 awakened
Dec  6 08:48:39 tecate monit[9988]: 'apache' failed to start
Dec  6 08:48:39 tecate monit[9988]: 'ospfd' start: /etc/init.d/ospfd
Dec  6 08:48:39 tecate monit[9988]: 'ospfd' unmonitor action done
Dec  6 08:48:39 tecate monit[9988]: Awakened by User defined signal 1
Dec  6 08:48:39 tecate monit[9988]: 'apache' service restarted 2 times within 2 cycles(s) - stop
Dec  6 08:48:39 tecate monit[9988]: 'ospfd' stop: /etc/init.d/ospfd
Dec  6 08:48:39 tecate monit[9988]: 'ospfd' unmonitor on user request
Dec  6 08:48:39 tecate monit[9988]: monit daemon at 9988 awakened
Dec  6 08:48:39 tecate monit[9988]: Awakened by User defined signal 1
Dec  6 08:48:39 tecate monit[9988]: 'ospfd' unmonitor action done

--

Dan Rich <address@hidden>

http://www.employees.org/~drich/
"Step up to red alert!" "Are you sure, sir?
It means changing the bulb in the sign..."
      - Red Dwarf (BBC)

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