I/O utilization & Xenserver

[Matthew J. Salerno]

You can also pull these stats form the Xen servers themselves via the Xen API. 
 I'm working on a perl implementation of the Xen API which will greatly reduce 
the amount of work required to write Xen nagios plugins.  I've got spent lots of 
time working on Citrix Xen servers and server monitoring.  When you are 
monitoring Xen servers, there are 2 places to collect stats.  The first being 
the host (Dom0) and the second being through the Xen API which will give you 
lots of easy to collect information from a Xen host or pool.  Basically, you 
could monitor your disk IO from Dom0 as well as through the Xen API via some SR 
monitors.  Using both would be the best approach, but right now it's not very 
easy.

For the iostat details, not sure if that comes installed on the Citrix Xen 
install, I have never seen a good solution.  Most solutions involve a cron job 
that executes iostat to collect data for x seconds and output the data to a text 
file which is then parsed and then passed on to a MIB.

Let us know if you find a good solution for collecting disk IO (It's been awhile 
since I checked).

I'll keep you posted about the Xen plugins.

Matthew J. Salerno


----- Original Message ----
From: "andrew2 at one.net" <andrew2 at one.net>
To: Nagios Users List <nagios-users at lists.sourceforge.net>
Sent: Tue, September 28, 2010 3:57:07 PM
Subject: [Nagios-users] I/O utilization & Xenserver

Is anyone monitoring realtime or near-realtime (5 min averages?) i/o
utilization in Citrix Xenserver pools using NFS volumes?  Ideally I'd love
to grab aggregrate data for each pool, but I'd even settle for per-node i/o
utilization.  I noticed that iostat is installed on Xenserver 5.6, so I
would assume that it should be possible to shoehorn NRPE onto each node and
whip up a quick little check script to grab some data from 'iostat -n' but
surely there's a better way to do this...

Andrew


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Start uncovering the many advantages of virtual appliances
and start using them to simplify application deployment and
accelerate your shift to cloud computing.
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