Announce: VOMon, a VO Monitoring Service

Hi all,
I'd like to announce a monitoring application that might be of interest to anyone who's responsible for keeping VO services up and running, and wants to find out about outages before their users do.

VOMon interrogates an IVOA registry with a sysadmin-supplied xquery, and pings the resulting services every so often to generate a html report on their statuses. An example report can be seen here: http://thor.roe.ac.uk/vomon/status.xml
In this case, the service is monitoring all services with authority Id "*roe.ac.uk", ie everything we run here at WFAU in Edinburgh.

Here is another example, monitoring all the publishing registries that are in the AstroGrid registry:
http://thor.roe.ac.uk/vomon-reg/status.xml

Currently "pinging" simply means checking that the accessUrl of the service returns http code 200. In some special cases such as cone, siap and ssap a trivial query string is appended to the URL. Once the VOSI interfaces are widely deployed I'll make VOMon use these instead. Out of the box, VOMon produces an html report which can be tailored to your needs by tweaking the associated xsl. It also ships with plugins that allow you to send notice of outages to you via email or jabber, or log them to a file (useful for calculating uptime).

If you want to try it out to monitor your own services you can download it from here:
http://vomon.sourceforge.net/

I'd be interested in any feedback you have on configuring it and running it.

Regards, and an early Merry Christmas,

John

Credits:
VOMon is basically a mash-up of the AstroRuntime (used to interrogate the registry), and MARS (used to do the actual monitoring).

-- 


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AstroGrid/VOTech
&
WFAU, Institute for Astronomy, Edinburgh
Skype:johndavidtaylor <skype:johndavidtaylor?chat>



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