Running Nagios on Vmware

[Herb J.]

For that size of a deployment you will definitely want to use dedicated 
hardware.

Also, with 300,000 services the standard nagios web interface could end 
up being quite slow. Our deployment has just over 21,000 services 
(multiple remote collectors feeding data back into a primary collector, 
all dual dual-core or dual quad-core Xeons with 4-8GB RAM). Even though 
the main server is overpowered and has lots of spare server resources, 
it takes 6 seconds for *any* page to be rendered (we store the Nagios 
status file on a ramdisk but it still takes several seconds to parse 
35MB of text on every page reload). Due to the number of people we have 
using it (anywhere from 20-40 users refreshing the page twice a minute), 
we were forced long ago to build a custom front end that is integrated 
into an existing equipment database (which is also used to build the 
Nagios config files) using NDOutils to extract the data from Nagios. (I 
still need to test and implement a better solution than NDO due to the 
amount of time it takes to repopulate the database after reloading the 
Nagios configs.) In order to head off any future scaling issues, I've 
even began abstracting various functionality out of Nagios into external 
scripts, e.g., sending notifications (sending a Jabber notification 
takes almost a second for the script to initialize the connection to our 
Jabber server, which is way too long and causes latency in Nagios when 
there are multiple host/service issues), adding/removing comments and 
acknowledgements, and as scheduling downtime (it's hard to usefully save 
historical comment, acknowledgement, and downtime data using only Nagios).


On 07/08/2010 10:20 AM, Ryan C Ash wrote:
> Sorry.  It probably would of helped to include some of this information.
> It would be a large deployment in terms of what I have seen others
> using.  There could be ~12 servers each with ~1,500 hosts and 300,000
> service checks (almost all NSCA).  We expect a lot of service checks per
> host so we want to keep the number of hosts homed to each server below
> 2,000.  I hope this helps.
>
> Thanks
>
> BTW if anyone has scalability documentation it would help us do some
> server sizing.
>
>
>
> -----Original Message-----
> From: Jason Gauthier [mailto:jgauthier at lastar.com]
> Sent: Thursday, July 08, 2010 9:11 AM
> To: Nagios Users List
> Subject: Re: [Nagios-users] Running Nagios on Vmware
>
>
>    
>> Is anyone aware of documentation or test cases showing whether or not
>>      
> running Nagios on VMware is a good idea?  I realize the common opinion
> is that it>is a bad idea due to I/O but I am looking for something a
> bit more in depth.
>
>    
>> Thanks
>>      
>
> I think it depends on your environment.  I'm running Nagios and Cacti on
> Hyper-V with 165 hosts and 487 services.   It seems to be fine.
> Sometimes apache is slow to respond.
>
>
>
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