44 lines
1.8 KiB
ReStructuredText
44 lines
1.8 KiB
ReStructuredText
Ceilometer Redis plugin
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=======================
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Ceilometer Redis Plugin provides a coordination mechanism for
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`Ceilometer agents <https://ceilometer.readthedocs.org/en/latest/architecture.html>`_.
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The first version of plugin will support only `Central Agent <https://ceilometer.readthedocs.org/en/latest/glossary.html#term-central-agent>`_.
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It uses `tooz library <http://docs.openstack.org/developer/tooz/>`_ with
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`Redis backend <http://redis.io>`_ to provide a set of resources
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to be polled for each Central agent. The plugin also changes deployment of Ceilometer central agent:
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now every controller has its own running ceilometer central service
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which are joined into coordination group. These changes in deployment will be done automatically.
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It also configures redis-server under pacemaker to monitor its process. The plugin configures
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`redis-sentinel <http://redis.io/topics/sentinel>`_ to monitor the state of redis cluster,
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to elect new master during failovers, to forward ceilometer agents to new elected redis master, to organize sync between redis nodes.
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Requirements
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------------
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======================= ================
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Requirement Version/Comment
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======================= ================
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Fuel 7.0
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tooz <0.14.0,>=0.13.1
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======================= ================
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.. _limitations:
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Limitations
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-----------
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* The plugin version 1.0-1.0.0-1 provides coordination only for Agent Central service.
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Alarm evaluator and Notification agent will be supported in the next plugin
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version.
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* The plugin works correctly only on clouds with odd numbers of controllers.
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This requirement is mandatory because Redis needs an odd number of nodes to
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choose the master successfully.
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.. include:: installation.rst
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.. include:: guide.rst
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