12.9. Configure the Compute Node

Procedure 12.7. Enabling Notifications on a Compute Node

1. Install the packages openstack-ceilometer-compute, python-ceilometer and python-ceilometerclient on the node:

   # yum install openstack-ceilometer-compute python-ceilometer python-ceilometerclient

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2. Enable auditing on the node:

   # openstack-config --set /etc/nova/nova.conf \
      DEFAULT instance_usage_audit True

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3. Configure the audit frequency:

   # openstack-config --set /etc/nova/nova.conf \
      DEFAULT instance_usage_audit_period hour

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4. Configure what type of state changes should trigger a notification:

   # openstack-config --set /etc/nova/nova.conf \
      DEFAULT notify_on_state_change vm_and_task_state

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5. Set the node to use the correct notification drivers. Open the /etc/nova/nova.conf file in a text editor, and add the following lines in the DEFAULT section:

   notification_driver = messagingv2
   notification_driver = ceilometer.compute.nova_notifier

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   The Compute node requires two different notification drivers, which are defined using the same configuration key. You cannot use openstack-config to set these values.
6. Start the Compute agent:

   # systemctl start openstack-ceilometer-compute.service

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7. Configure the agent to start at boot time:

   # systemctl enable openstack-ceilometer-compute.service

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8. Restart the openstack-nova-compute service to apply all changes to /etc/nova/nova.conf:

   # systemctl restart openstack-nova-compute.service

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