[TriLUG] "Light" monitoring

[Ron Kelley]

AH - perfect situation for "monit".

We use monit at the data center to monitor all our infrastructure devices, and it works great!  I can monitor CPU, RAM, disk space, services, watch log files or certain regexp conditions, etc.  If something happens (ie: apache dies), you can set an auto-restart policy accompanied by alerts.

http://mmonit.com/


Let me know if you need any examples/pointers...



Thanks,

-----------------------------
Ron Kelley
rkelleyrtp at gmail.com



On Mar 29, 2013, at 11:12 AM, Brian McCullough wrote:

> I have been working on how to ask this question, but I guess I'll go
> ahead anyway.
> 
> 
> I have a system that seems to be becoming more fragile, and I would like
> to monitor it, and send myself e-mail messages when it needs attention.
> 
> 
> I know about Nagios, but it seems to add more load to the target system
> than I would like, with it's polling several times per second, depending
> on what services it is monitoring.
> 
> I also wondered about something like MRTG, and read the graphs remotely.
> I don't know whether I can set up alarms that way, though.
> 
> I can also do something like "ping -c 3" from an outside site.
> 
> 
> Primarily, to begin with, I am interested in load levels and web server
> "aliveness" over time, with the ability to alarm ( via e-mail and
> possibly SMS ) when some threshold ( say high load over three minutes )
> is passed.
> 
> I have had the web server apparently just go away two or three times
> this month, and have seen some very high "top" values at more than one
> point. 
> 
> Side question -- since Top and friends only show one value, what is it saying about a multi-cpu system?
> 
> 
> 
> Any suggestions, or roll my own?  I'm sure that that is not the answer;
> there have to be multiple tools to help me with this problem.
> 
> 
> Thanks,
> Brian
> 
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