[TriLUG] "Light" monitoring

[Ron Kelley]

Forgot to mention; there are two versions of monit - the free one and the paid one.  We use the free one - http://mmonit.com/monit/

Thanks,

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



On Mar 29, 2013, at 11:23 AM, Ron Kelley wrote:

> 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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>