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12.9. Configure the Compute Node
The Telemetry service monitors each node by collecting usage data from the Compute agent (
openstack-ceilometer-compute) installed on that node. You can configure a node's Compute agent by replicating the /etc/ceilometer/ceilometer.conf file from another host whose Telemetry components have already been configured.
You must also configure the Compute node itself to enable notifications.
Procedure 12.7. Enabling Notifications on a Compute Node
- Install python-ceilometer and python-ceilometerclient on the node:
#yum install python-ceilometer python-ceilometerclient - Enable auditing on the node:
#openstack-config --set /etc/nova/nova.conf \DEFAULT instance_usage_audit True - Configure the audit frequency:
#openstack-config --set /etc/nova/nova.conf \DEFAULT instance_usage_audit_period hour - 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 - Set the node to use the correct notification drivers. Open the
/etc/nova/nova.conffile in a text editor, and add the following lines in theDEFAULTsection:notification_driver = messagingv2 notification_driver = ceilometer.compute.nova_notifier
The Compute node requires two different notification drivers, which are defined using the same configuration key. You cannot useopenstack-configto set these values. - Start the Compute agent:
#systemctl start openstack-ceilometer-compute.service - Configure the agent to start at boot time:
#systemctl enable openstack-ceilometer-compute.service - Restart the
openstack-nova-computeservice to apply all changes to/etc/nova/nova.conf:#systemctl restart openstack-nova-compute.service
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