[Gluster-infra] Move of munin inside the DC

[Michael Scherer]

Hi,

so today, I moved (without too much problem) our external munin to the
internal lan, which help us getting rid of one more VM on rackspace.

This bring:
- monitoring of the internal servers
- more protection (since no longer accessible from outside, except by
the proxy)
- less server on rackspace
- potentially link that with nagios for monitoring


The url is still (but now served by the proxy):

https://munin.gluster.org/

The astute reader will see holes in some graphs, and some servers
without historical data.

The lack of historical data was because munin was on the cloud, so not
able to reach the internal lan. So new servers to graphs woohoo \o/


The gap of 4h were due to another project website build breaking
(docker breaking, causing all stuff to go on 1 node, so oom on the
openshift cluster, so no new build), so I had to look at that.

Then the new munin package had some perl module missing ( https://bugzi
lla.redhat.com/show_bug.cgi?id=1628390 ), so things were not working,
but in a subtle way (aka, I had to use the debugger). 

And some error in the existing munin role regarding firewall reloading,
etc compat with debian, freebsd, etc, that were found after deployment

So there is still some servers to integrate, some others to remove, but
so far, it went well.
-- 
Michael Scherer
Sysadmin, Community Infrastructure and Platform, OSAS

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