[Xymon] Detecting read-only file system in Linux

[SebA]

> -----Original Message-----
> From: Axel Beckert [mailto:beckert at phys.ethz.ch] 
> Sent: 09 March 2015 13:14
> To: SebA
> Cc: xymon at xymon.com
> Subject: Re: Detecting read-only file system in Linux
> 
> Hi,
> 
> On Mon, Mar 09, 2015 at 12:44:03PM -0000, SebA wrote:
> > I have been trying to find out if there is a way of Xymon 
> detecting that a
> > file-system in Linux has gone read-only as a result of a 
> disk error (other
> > than reporting it just the once via monitoring 
> /var/log/messages).  Nothing
> > is showing up in my Xymon server, but my xymon-client is a bit old:
> > xymon-client-4.3.7-26.1.el5.tnt
> >  
> > I did a bit of Googling and I came up with these two links 
> that may be
> > relevant:
> > http://sisyphus.ru/en/srpm/Sisyphus/xymon/sources/8
> > https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=764197
> >  
> > It seems that a RPM maintainer may have made some 
> modifications to their
> > version in order to catch disks in a read-only state (in 
> the first link) and
> > that there is mount-ro plugin that is part of the 
> hobbit-plugins package in
> > Debian / Ubuntu.  Does anyone have more information on either of
> > these
> 
> I'm one of the maintainers of Debian's hobbit-plugins package, so
> yes. :-)

Great, I thought as much!

> > and whether any patches can be integrated upstream or plug-ins added
> > to xymonton?
> 
> I'm not sure where exactly at https://wiki.xymonton.org/ I should add
> our set of plugins.

I'm not an expert, but I would have thought under monitors - that is where
most of the existing 'things' are, and I expect that most of 'your' plugins
are monitors?
https://wiki.xymonton.org/doku.php/monitors


> > CCing Axel Beckert as he seems to have committed
> > something to the mount-ro plugin recently:
> > https://www.openhub.net/p/hobbit-plugins/commits
> 
> Hrm, OpenHub seems horribly out of date with most projects
> recently... The full view on that Git repo is at
> https://anonscm.debian.org/cgit/collab-maint/hobbit-plugins.git/
> 
> The source code of the mount-ro plugin is quite simple:
> https://anonscm.debian.org/cgit/collab-maint/hobbit-plugins.gi
> t/tree/misc.d/mount-ro
> 
> It's though not a direct plugin but meant for the meta-plugin "misc"
> which calls all scripts in /etc/xymon/misc.d/ and summarizes their
> exit codes into a single check. This is meant for checks which get
> yellow/red only very seldom and where you don't want to waste a whole
> column for it.
> 
> misc plugin:
> https://anonscm.debian.org/cgit/collab-maint/hobbit-plugins.gi
> t/tree/client-ext/misc
> 
> Hobbit.pm used in the misc plugin and many other plugins in that
> package:
> https://anonscm.debian.org/cgit/collab-maint/hobbit-plugins.gi
> t/tree/perl/Hobbit.pm

Thanks very much Axel: this should enable me to get these working on
non-Debian. Are there any docs in the Git repo (or elsewhere)?

> 		Kind regards, Axel Beckert
> -- 
> Axel Beckert <beckert at phys.ethz.ch>       support: +41 44 633 26 68
> IT Services Group, HPT H 6                  voice: +41 44 633 41 89
> Departement of Physics, ETH Zurich
> CH-8093 Zurich, Switzerland		   http://nic.phys.ethz.ch/


Kind regards, 

Sebastian