[Xymon] New 4.3.28 build collecting no data to RRD

[Erik]

I don't think those messages you're seeing are related to your problem.  I
have plenty of those same log entries and mine is working fine.

My first question would be permissions.  I see your listing of permissions
for the directory, but not the permissions on /opt/xymon/data, /opt/xymon,
and /opt...  what are those.  If eXecute permissions aren't set on all
parent directories, I don't think other users can read from there.

Also.. is SELinux getting in your way?  SELinux used to bite me a lot when
I first stopped disabling it and actually working with it.

Check SELinux Status:
#> getenforce

If it returns "Enforcing".. you'll have some additional work to do:

Set SELinux to "Permissive" mode.. but do NOT leave it like this:
#> setenforce 0

There are better tools for this in RHEL/Centos 7, but this is what I do to
get by in previous versions..

Make note of NUM_OF_LINES in the log file
#> LINES=$(wc -l /var/log/audit/audit.log | awk '{ print $1 }')

Next, run the Xymon GUI through it's paces..  Look at graphs,
enable/disable monitoring, acknowledge alerts, edit critical systems,
everything you can think of..

Then, generate a custom SELinux policy module using the log entries you
generated by running Xymon in permissive mode:
#> sed -n "$(($LINES + 1)),$ p" /var/log/audit/audit.log | audit2allow -M
xymon

Install the new policy module:
#> semodule -i xymon.pp

Restore SELinux to "Enforcing" mode:
#> setenforce 1
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