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 openstack-ceilometer-compute, python-ceilometer and python-ceilometerclient on the node:
#
yum install openstack-ceilometer-compute 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.conf
file in a text editor, and add the following lines in theDEFAULT
section: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-config
to 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-compute
service to apply all changes to/etc/nova/nova.conf
:#
systemctl restart openstack-nova-compute.service