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BZ #1180158: Ceilometer workload partitioning with tooz & redis #449

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BZ #1180158: Ceilometer workload partitioning with tooz & redis #449

wants to merge 2 commits into from

Commits on Jan 13, 2015

  1. BZ #1180158: Ceilometer workload partitioning with tooz & redis 

    https://bugzilla.redhat.com/show_bug.cgi?id=1180158

The quickstack::pacemaker:ceilometer puppet class now allows
redis to be specified as the backend for tooz, to be used for
workload partitioning in the ceilometer central agent and
alarm evaluator.

We do not create a pacemaker resource for redis, as this will
instead be self-monitored via the redis-sentinel service (via
a subsequent patch, once the support for sentinel in tooz is
packaged python-tooz).
    Eoghan Glynn committed Jan 13, 2015
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  2. BZ #1180158: Ceilometer coordination resilience with redis-sentinel 

    https://bugzilla.redhat.com/show_bug.cgi?id=1180158

We use redis-sentinel to monitor the redis instances running on
controller nodes, and to detect when mastership needs to be failed
over to a slave.

The sentinel cluster has a default quorum of 2, so can survive the
loss of one controller on a minimally sized HA controller plane.

The ceilometer backend_url contains a list of fallback sentinels,
similar in style to the mongodb connect URL, except that the additional
addresses are specified as query parameters.
    Eoghan Glynn committed Jan 13, 2015
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