Hi,
On 09 Mar 2015, at 13:44, SebA <spah at syntec.co.uk> wrote:
(…)
Although we have some Debian systems, I was looking for a solution for another Linux distro.
If I was to write something myself to do it, I would check /proc/mounts and the best command I could find was: awk '$4~/(^|,)ro($|,)/' /proc/mounts which outputs: /dev/root / ext3 ro,data=ordered 0 0 with sample line: /dev/root / ext3 ro,data=ordered 0 0
You could use the reported “Client data” / “clientlog” with a server-side extension. I have to admit that I’m not 100% sure if error-or-remounts are reflected properly by this — but mount seems to use /proc/self/mountinfo as it’s datasource, so it _should_ be ok.
Extract the reported mount-data for host bb.local:
xymon 127.0.0.1 “clientlog bb.local section=mount”Some testing of the output:
(export host=bb.local; xymon 127.0.0.1:1984 "clientlog $host section=mount" | gawk '/[(,]+ro[,)]+/ { print "filesystem " $1 " mounted RO!" } ')This would not require installing and maintaining an extension on every client. One drawback would be increased latency as the ro-check would be “indirect”.
Cheers Thomas