[Xymon] Issue with Regex and NORRDDISKS Setting

[J.C. Cleaver]

On Wed, March 2, 2016 8:31 am, Matt Vander Werf wrote:
> Hello,
>
> Looking at past list e-mails, it is my understanding that the NORRDDISKS
> setting in xymonserver.cfg allows for PCRE regular expressions. Is this
> correct? Or does it only allow certain PCRE regular expressions, but not
> everything?
>
> I ask because I'm experiencing an issue with my NORRDDISKS setting.
>
> I'd like to ignore disks for graphing that have mount points "/tmp", but
> not ignore disks with mount points that have "tmp" in them, like
> "/tmpscratch".
>
> I noticed that for other disk mount point names that if you just use
> "^/<name>" with no modifiers, then it only ignores disk mount points with
> only exactly "^/<name>" and not "^/<name><additional text>" or
> "^/<name>/<more name>" (at least from what I can tell).
>
> For example when using:
>
> NORRDDISKS="^/dev|^/tmp|^/var"
>
> It ignores disks with mount points "/dev" and "/var", but also "/tmp" AND
> "/tmpscratch". But it doesn't look like it ignores "/var/tmp" (at least as
> far as I can tell).
>
> I tried using "^/tmp$" and that didn't work either (still ignored both
> names).
>
>
> Any idea what's going on here? Or how this can be done correctly? Is the
> "$" metacharacter not allowed in this setting?
>
>
> If it's needed, I'm running the latest 4.3.26-1 Terabithia RPM on RHEL 7.
>
> Thanks for any help!!
>
> --
> Matt Vander Werf


Try checking the output of 'xymoncmd env | grep NORRD' ? If the '$' is not
coming through, it might be getting read in as an attempt at a shell
variable.

If so, can you try escaping it as \$ instead?

Alternatively: '^(/dev|/tmp|/var)$'


HTH,
-jc