65 lines
2.2 KiB
Plaintext
65 lines
2.2 KiB
Plaintext
[[s-ceilometer-agent-central]]
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==== Highly available Telemetry central agent
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Telemetry (ceilometer) is the metering and monitoring service in
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OpenStack. The Central agent polls for resource utilization
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statistics for resources not tied to instances or compute nodes.
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NOTE: Due to limitations of a polling model, a single instance of this agent
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can be polling a given list of meters. In this setup, we install this service
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on the API nodes also in the active / passive mode.
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Making the Telemetry central agent service highly available in active / passive mode involves
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managing its daemon with the Pacemaker cluster manager.
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NOTE: You will find at http://docs.openstack.org/developer/ceilometer/install/manual.html#installing-the-central-agent[this page]
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the process to install the Telemetry central agent.
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===== Add the Telemetry central agent resource to Pacemaker
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First of all, you need to download the resource agent to your system:
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----
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cd /usr/lib/ocf/resource.d/openstack
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wget https://raw.github.com/madkiss/openstack-resource-agents/master/ocf/ceilometer-agent-central
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chmod a+rx *
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----
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You may then proceed with adding the Pacemaker configuration for
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the Telemetry central agent resource. Connect to the Pacemaker cluster with +crm
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configure+, and add the following cluster resources:
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----
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include::includes/pacemaker-ceilometer_agent_central.crm[]
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----
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This configuration creates
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* +p_ceilometer-agent-central+, a resource for manage Ceilometer Central Agent service
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+crm configure+ supports batch input, so you may copy and paste the
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above into your live pacemaker configuration, and then make changes as
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required.
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Once completed, commit your configuration changes by entering +commit+
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from the +crm configure+ menu. Pacemaker will then start the Ceilometer Central Agent
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service, and its dependent resources, on one of your nodes.
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===== Configure Telemetry central agent service
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Edit +/etc/ceilometer/ceilometer.conf+ :
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----
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# We use API VIP for Identity Service connection :
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os_auth_url=http://192.168.42.103:5000/v2.0
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# We send notifications to High Available RabbitMQ :
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notifier_strategy = rabbit
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rabbit_host = 192.168.42.102
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[database]
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# We have to use MySQL connection to store data :
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sql_connection=mysql://ceilometer:password@192.168.42.101/ceilometer
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----
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