adding templating in opentsdb graphs

[mchataigner]

I find that templated dashboard is a really great idea. Unfortunately it was not possible to do it with Opentsdb based graphs. Here is a quick hack to make it works fine.

[coveralls]

Coverage decreased (-0.06%) when pulling de00d18 on mchataigner:master into 920e5c9 on grafana:master.

[coveralls]

Coverage decreased (-0.06%) when pulling 482b312 on mchataigner:master into 920e5c9 on grafana:master.

[torkelo]

Just an update, will be review all the OpenTSDB PRs next week. I am still "on the road" and do not have access to my desktop laptop with my docker opentsdb test environments (my laptop disk space is empty).

[mchataigner]

Thank you for the update. Take your time ;-)

[torkelo]

Please sign the CLA, http://grafana.org/docs/contributing/cla.html

[mchataigner]

Done

[nickman]

Attempting to use templating with OpenTSDB and a Grafana build from Master (as of Nov 8, 2014).
Can you supply a couple of syntax examples ?

[torkelo]

First enable templating in dashboard settings / Features tab. Next add a template variable of type "custom". Specify a comma separated list of values.

Use the variable in a tag or series name in the query editor (just specify $var_name)

[nickman]

Ah got it. Sorry, for some reason, I thought it would be "magically" enabled to query all possible values for my specified expression, but I had no idea how that would work..... Cheers !