[rrd-users] Setting RRDCACHED_ADDRESS globally

[Steve Shipway]

If using Apache, you can set the environment variable globally in the httpd.
conf (using SetEnv) and this is passed on to all CGI scripts.  This works
for most applications; however note that not all things will go via
RRDcached, particularly if you are not using 1.4.trunk of RRDTool/rrdcached.
You might like to make sure that the files are local as well, else things
like ‘info’ will fail which might confuse cacti.

 

Steve

 

  _____  

Steve Shipway

ITS Unix Services Design Lead

University of Auckland, New Zealand

Floor 1, 58 Symonds Street, Auckland

Phone: +64 (0)9 3737599 ext 86487

DDI: +64 (0)9 924 6487

Mobile: +64 (0)21 753 189

Email:  <mailto:s.shipway at auckland.ac.nz> s.shipway at auckland.ac.nz

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From: rrd-users-bounces+s.shipway=auckland.ac.nz at lists.oetiker.ch
[mailto:rrd-users-bounces+s.shipway=auckland.ac.nz at lists.oetiker.ch] On
Behalf Of Simon Hobson
Sent: Friday, 18 January 2013 10:41 p.m.
To: rrd-users at lists.oetiker.ch
Subject: [rrd-users] Setting RRDCACHED_ADDRESS globally

 

I've just started looking at using Cacti internally for some stuff as my
hand-rolled cgi scripts aren't the easiest to maintain. However, I've hit a
problem with caching.
Where I have remote data collection, I use rrdcached. But Cacti doesn't have
an option to add a --daemon switch or set the RRDCACHED_ADDRESS environment
variable. I've found I can set RRDCACHED_ADDRESS globally for the web server
either by adding it to the Apache config - but that breaks any rrdtool graph
calls for rrds that don't use cached.
 
I can try hacking the Cacti code where it builds the graph definition, but I
guess I'd need to look at the RRD path and figure out if it's handled
directly or cached - and that'll mean learning some PHP.
 
 
Any other suggestions ?

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