Ubuntu 20.04
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OpenStack Xena : How to use Ceilometer (Nova Compute)2021/10/11

 
This is how to use OpenStack Telemetry Service (Ceilometer) for Nova Compute service.
This example is based on the environment like follows.
------------+---------------------------+---------------------------+------------
            |                           |                           |
        eth0|10.0.0.30              eth0|10.0.0.50              eth0|10.0.0.51
+-----------+-----------+   +-----------+-----------+   +-----------+-----------+
|    [ Control Node ]   |   |    [ Storage Node ]   |   |    [ Compute Node ]   |
|                       |   |                       |   |                       |
|  MariaDB    RabbitMQ  |   |      Open vSwitch     |   |        Libvirt        |
|  Memcached  httpd     |   |     Neutron Server    |   |     Nova Compute      |
|  Keystone   Glance    |   |       OVN-Northd      |   |      Open vSwitch     |
|  Nova API             |   |     Cinder Volume     |   |   OVN Metadata Agent  |
|  Cinder API           |   |    Heat API/Engine    |   |     OVN-Controller    |
|                       |   |    Gnocchi   httpd    |   |   Ceilometer Compute  |
|                       |   |   Ceilometer Central  |   |                       |
+-----------------------+   +-----------------------+   +-----------------------+

[1] Change settings for Nova Compute service to enable Telemetry data collention like follows.
root@node01:~#
vi /etc/nova/nova.conf
# add follows into [DEFAULT] section
instance_usage_audit = True
instance_usage_audit_period = hour

# add to the end
[notifications]
notify_on_state_change = vm_and_task_state

[oslo_messaging_notifications]
driver = messagingv2

root@node01:~#
systemctl restart nova-compute

[2] It's some example to display metrics and meters.
# start an instance

ubuntu@dlp ~(keystone)$
openstack server list

+--------------------------------------+-------------+---------+-------------------------------------+------------+----------+
| ID                                   | Name        | Status  | Networks                            | Image      | Flavor   |
+--------------------------------------+-------------+---------+-------------------------------------+------------+----------+
| 4699d575-1d94-4024-8323-9dfa3599c8d2 | Ubuntu-2004 | SHUTOFF | private=10.0.0.249, 192.168.100.237 | Ubuntu2004 | m1.small |
+--------------------------------------+-------------+---------+-------------------------------------+------------+----------+

ubuntu@dlp ~(keystone)$
openstack server start Ubuntu-2004

# display resources
# after doing some operations on instance, metrics data are gotten

ubuntu@dlp ~(keystone)$
openstack metric resource list

+--------------------------------------+----------------------------+----------------------------------
| id                                   | type                       | project_id                       
+--------------------------------------+----------------------------+----------------------------------
| 4699d575-1d94-4024-8323-9dfa3599c8d2 | instance                   | facc545a7f9e4218884c40169158a2dc 
| 75d568e7-b47a-54a2-911e-5c189f4c75c8 | instance_disk              | facc545a7f9e4218884c40169158a2dc 
| 2d65a40a-ec43-58ad-bfd9-c5b4df1059ae | instance_network_interface | facc545a7f9e4218884c40169158a2dc 
+--------------------------------------+----------------------------+----------------------------------
+----------------------------------+-----------------------------------------------------------------------
| user_id                          | original_resource_id                                                  
+----------------------------------+-----------------------------------------------------------------------
| f5a7ffdd6e54434badbd75ba0e6d6ac2 | 4699d575-1d94-4024-8323-9dfa3599c8d2                                  
| f5a7ffdd6e54434badbd75ba0e6d6ac2 | 4699d575-1d94-4024-8323-9dfa3599c8d2-vda                              
| f5a7ffdd6e54434badbd75ba0e6d6ac2 | instance-00000001-4699d575-1d94-4024-8323-9dfa3599c8d2-tap6009a23e-bc 
+----------------------------------+-----------------------------------------------------------------------
+----------------------------------+----------+----------------------------------+--------------
| started_at                       | ended_at | revision_start                   | revision_end 
+----------------------------------+----------+----------------------------------+--------------
| 2021-10-11T05:07:33.252971+00:00 | None     | 2021-10-11T05:07:33.252981+00:00 | None         
| 2021-10-11T05:11:29.849202+00:00 | None     | 2021-10-11T05:11:29.849211+00:00 | None         
| 2021-10-11T05:11:29.939003+00:00 | None     | 2021-10-11T05:11:29.939010+00:00 | None         
+----------------------------------+----------+----------------------------------+--------------
+-------------------------------------------------------------------+
| creator                                                           |
+-------------------------------------------------------------------+
| 6f2ebeebee50478588d34251b7770183:611e3ba8938b475fb9dd8124603f18d3 |
| 6f2ebeebee50478588d34251b7770183:611e3ba8938b475fb9dd8124603f18d3 |
| 6f2ebeebee50478588d34251b7770183:611e3ba8938b475fb9dd8124603f18d3 |
+-------------------------------------------------------------------+

# details of the [instance] resource

ubuntu@dlp ~(keystone)$
openstack metric resource show 4699d575-1d94-4024-8323-9dfa3599c8d2

+-----------------------+-------------------------------------------------------------------+
| Field                 | Value                                                             |
+-----------------------+-------------------------------------------------------------------+
| created_by_project_id | 611e3ba8938b475fb9dd8124603f18d3                                  |
| created_by_user_id    | 6f2ebeebee50478588d34251b7770183                                  |
| creator               | 6f2ebeebee50478588d34251b7770183:611e3ba8938b475fb9dd8124603f18d3 |
| ended_at              | None                                                              |
| id                    | 4699d575-1d94-4024-8323-9dfa3599c8d2                              |
| metrics               | cpu: 55c64dd6-4785-4473-8f3f-62361f0899e7                         |
|                       | disk.ephemeral.size: 1d69ec72-1a3c-4b26-938c-0cbca5c72849         |
|                       | disk.root.size: d1ba8f75-1e66-415e-a936-750e7164c107              |
|                       | memory.usage: 0c5bf3fd-8a18-4255-b216-91193149dc7f                |
|                       | memory: c0244f89-0c38-46bf-be85-0188a0f903a2                      |
|                       | vcpus: a2c39716-a3ce-423e-a16e-34c34a5c3867                       |
| original_resource_id  | 4699d575-1d94-4024-8323-9dfa3599c8d2                              |
| project_id            | facc545a7f9e4218884c40169158a2dc                                  |
| revision_end          | None                                                              |
| revision_start        | 2021-10-11T05:07:33.252981+00:00                                  |
| started_at            | 2021-10-11T05:07:33.252971+00:00                                  |
| type                  | instance                                                          |
| user_id               | f5a7ffdd6e54434badbd75ba0e6d6ac2                                  |
+-----------------------+-------------------------------------------------------------------+

# CPU

ubuntu@dlp ~(keystone)$
openstack metric measures show 55c64dd6-4785-4473-8f3f-62361f0899e7

+---------------------------+-------------+---------------+
| timestamp                 | granularity |         value |
+---------------------------+-------------+---------------+
| 2021-10-11T14:10:00+09:00 |       300.0 |   680000000.0 |
| 2021-10-11T14:20:00+09:00 |       300.0 | 96200000000.0 |
+---------------------------+-------------+---------------+

# memory usage

ubuntu@dlp ~(keystone)$
openstack metric measures show 0c5bf3fd-8a18-4255-b216-91193149dc7f

+---------------------------+-------------+------------+
| timestamp                 | granularity |      value |
+---------------------------+-------------+------------+
| 2021-10-11T14:20:00+09:00 |       300.0 | 402.734375 |
+---------------------------+-------------+------------+

# details of [instance_network_interface]

ubuntu@dlp ~(keystone)$
openstack metric resource show 2d65a40a-ec43-58ad-bfd9-c5b4df1059ae

+-----------------------+-----------------------------------------------------------------------+
| Field                 | Value                                                                 |
+-----------------------+-----------------------------------------------------------------------+
| created_by_project_id | 611e3ba8938b475fb9dd8124603f18d3                                      |
| created_by_user_id    | 6f2ebeebee50478588d34251b7770183                                      |
| creator               | 6f2ebeebee50478588d34251b7770183:611e3ba8938b475fb9dd8124603f18d3     |
| ended_at              | None                                                                  |
| id                    | 2d65a40a-ec43-58ad-bfd9-c5b4df1059ae                                  |
| metrics               | network.incoming.bytes: d6550a69-35d8-4aed-8c53-292a79b5281f          |
|                       | network.incoming.packets: 59510a1e-b68e-418c-b926-966907663b54        |
|                       | network.outgoing.bytes: 8822ec01-7668-476d-a9c6-40542ee7e291          |
|                       | network.outgoing.packets: 093d196f-bce2-43b7-8593-dde4c4c2b559        |
| original_resource_id  | instance-00000001-4699d575-1d94-4024-8323-9dfa3599c8d2-tap6009a23e-bc |
| project_id            | facc545a7f9e4218884c40169158a2dc                                      |
| revision_end          | None                                                                  |
| revision_start        | 2021-10-11T05:11:29.939010+00:00                                      |
| started_at            | 2021-10-11T05:11:29.939003+00:00                                      |
| type                  | instance_network_interface                                            |
| user_id               | f5a7ffdd6e54434badbd75ba0e6d6ac2                                      |
+-----------------------+-----------------------------------------------------------------------+

# display network incoming bytes

ubuntu@dlp ~(keystone)$
openstack metric measures show d6550a69-35d8-4aed-8c53-292a79b5281f

+---------------------------+-------------+---------+
| timestamp                 | granularity |   value |
+---------------------------+-------------+---------+
| 2021-10-11T14:10:00+09:00 |       300.0 |     0.0 |
| 2021-10-11T14:20:00+09:00 |       300.0 | 46886.0 |
+---------------------------+-------------+---------+

# display network outgoing bytes

ubuntu@dlp ~(keystone)$
openstack metric measures show 8822ec01-7668-476d-a9c6-40542ee7e291

+---------------------------+-------------+----------+
| timestamp                 | granularity |    value |
+---------------------------+-------------+----------+
| 2021-10-11T14:10:00+09:00 |       300.0 |     90.0 |
| 2021-10-11T14:20:00+09:00 |       300.0 | 918453.0 |
+---------------------------+-------------+----------+
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