Nagios plugin?

[Justin H. Brehm]

>I was just thinking about the case when you run Nagios on another 
>machine. Here at Mozilla we have a few machines that do Nagios checks 
>in the different data centers and then those are sent up to the 
>central Nagios server which does the alerting and such. We don't use 
>MogileFS, but if we did, it wouldn't be installed on the machines that 
>do the checks. 

I saw a presentation about something like this at the last LISA conference. Pretty awesome, but luckily I don't have to support that yet. :) This is just a local NRPE plugin that we use so what I'm doing is putting the script on each tracker and then just specifying 'localhost:7001' to test each individually. I guess script should say 'tracker' instead of 'trackers' as that's how I'm using it. 

I haven't really looked at the MogileFS code too much, but I wasn't sure if having one tracker down out of three would cause any problems. We're using an older PHP class that somebody submitted to PEAR a long time ago and I'm pretty sure that it takes the string of trackers and randomly selects one and then contacts Mogile. If this is the case then one bad tracker could cause problems. I could also be wrong with that and it might hand off the tracker selection to Mogile where it will skip down trackers and move on. Again, I'm not sure if Mogile does this for you or not. 

--Justin 
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