Nagios event handlers
In an effort to further hide the fas issues we've been running into I've
added an event handler to the app servers. A brief description of the
problem is when fas hangs, app server httpd processes stack up. When they
do they become unresponsive.
Currently nagios does this on failure:
Failed check 1: nothing (Soft)
Failed check 2: nothing (Soft)
Failed check 3: Send notification (hard)
Once it hits that hard state, nagios claims its dead. We get paged, the
alert shows up in #fedora-noc. Doom.
Now what it does is this:
Failed check 1: nothing (Soft)
Failed Check 2: send notification to #fedora-noc, issue a service httpd
reload
Failed Check 3: Send paged / emailed notifications, issue a service httpd
restart
This is a very different change from how things were and as such we should
track this closely. The reason for the notification issue to #fedora-noc
is to ensure things aren't auto-correcting without us knowing. But at the
same time we're not generating a lot of un-needed email / paged alerts.
I'm going to let this run for a while and lets see how it goes.
pkgdb, for whatever reason, has always been an excellent canary which is
why I'm checking it.
Questions / comments?
-Mike