Matt Riedemann 30d42b7f48 Add a cluster health indicator to the graph output
This uses the ES health API to get the cluster health status
and pretty it up in our index/gate graph pages.

The cluster health API is documented here:

https://www.elastic.co/guide/en/elasticsearch/reference/current/cluster-health.html

Also add a note to the readme on how to view the openstack
ES cluster health.

Change-Id: I3df833cf5024af7282e2602e7dfa5db9c3384b6a
2016-03-09 15:35:37 -05:00
..
2014-09-29 19:06:14 -04:00
2015-12-22 18:07:04 +05:30