Ubuntu 22.04
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OpenStack Yoga : How to use Ceilometer (Nova Compute)
2022/05/07
 
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
+-----------+-----------+     +-----------+-----------+     +-----------+-----------+
|   [ dlp.srv.world ]   |     | [ network.srv.world ] |     |  [ node01.srv.world ] |
|     (Control Node)    |     |     (Network Node)    |     |     (Compute Node)    |
|                       |     |                       |     |                       |
|  MariaDB    RabbitMQ  |     |      Open vSwitch     |     |        Libvirt        |
|  Memcached  httpd     |     |     Neutron Server    |     |      Nova Compute     |
|  Keystone   Glance    |     |      OVN-Northd       |     |      Open vSwitch     |
|  Nova API  Cinder API |     |     Cinder Volume     |     |   OVN Metadata Agent  |
|                       |     |     Gnocchi httpd     |     |     OVN-Controller    |
|                       |     |   Ceilometer Central  |     |   Ceilometer Compute  |
+-----------------------+     +-----------------------+     +-----------------------+

[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   |
+--------------------------------------+-------------+---------+-------------------------------------+------------+----------+
| 6781b9c7-19c6-4419-a910-d0ae43c7526c | Ubuntu-2204 | SHUTOFF | private=10.0.0.203, 192.168.100.164 | Ubuntu2204 | m1.small |
+--------------------------------------+-------------+---------+-------------------------------------+------------+----------+

ubuntu@dlp ~(keystone)$
openstack server start Ubuntu-2204

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

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

+--------------------------------------+----------------------------+----------------------------------
| id                                   | type                       | project_id                       
+--------------------------------------+----------------------------+----------------------------------
| 6781b9c7-19c6-4419-a910-d0ae43c7526c | instance                   | 66102fdb888d4556a59dcff8b631ffdf 
| e540d3c4-7e04-5ef8-8399-5b66d78d1056 | instance_network_interface | 66102fdb888d4556a59dcff8b631ffdf 
| a302db56-ba64-5f36-9182-f3a9572aab1d | instance_disk              | 66102fdb888d4556a59dcff8b631ffdf 
+--------------------------------------+----------------------------+----------------------------------
+----------------------------------+-----------------------------------------------------------------------
| user_id                          | original_resource_id                                                  
+----------------------------------+-----------------------------------------------------------------------
| 74a373164921492ca35d32fea0fd2d86 | 6781b9c7-19c6-4419-a910-d0ae43c7526c                                  
| 74a373164921492ca35d32fea0fd2d86 | instance-00000001-6781b9c7-19c6-4419-a910-d0ae43c7526c-tapa1d93d65-68 
| 74a373164921492ca35d32fea0fd2d86 | 6781b9c7-19c6-4419-a910-d0ae43c7526c-vda                              
+----------------------------------+-----------------------------------------------------------------------
+----------------------------------+----------+----------------------------------+--------------
| started_at                       | ended_at | revision_start                   | revision_end 
+----------------------------------+----------+----------------------------------+--------------
| 2022-05-05T15:31:25.767200+00:00 | None     | 2022-05-05T15:31:25.767212+00:00 | None         
| 2022-05-05T15:35:38.619516+00:00 | None     | 2022-05-05T15:35:38.619523+00:00 | None         
| 2022-05-05T15:35:38.629433+00:00 | None     | 2022-05-05T15:35:38.629441+00:00 | None         
+----------------------------------+----------+----------------------------------+--------------
+-------------------------------------------------------------------+
| creator                                                           |
+-------------------------------------------------------------------+
| 66d094f65ddd49ebb6e27f48ed2c6448:c1c4d9a5313f43bd9f6f555e2d34ab28 |
| 66d094f65ddd49ebb6e27f48ed2c6448:c1c4d9a5313f43bd9f6f555e2d34ab28 |
| 66d094f65ddd49ebb6e27f48ed2c6448:c1c4d9a5313f43bd9f6f555e2d34ab28 |
+-------------------------------------------------------------------+

# details of the [instance] resource

ubuntu@dlp ~(keystone)$
openstack metric resource show 6781b9c7-19c6-4419-a910-d0ae43c7526c

+-----------------------+-------------------------------------------------------------------+
| Field                 | Value                                                             |
+-----------------------+-------------------------------------------------------------------+
| created_by_project_id | c1c4d9a5313f43bd9f6f555e2d34ab28                                  |
| created_by_user_id    | 66d094f65ddd49ebb6e27f48ed2c6448                                  |
| creator               | 66d094f65ddd49ebb6e27f48ed2c6448:c1c4d9a5313f43bd9f6f555e2d34ab28 |
| ended_at              | None                                                              |
| id                    | 6781b9c7-19c6-4419-a910-d0ae43c7526c                              |
| metrics               | cpu: cbd8fc75-0599-42b3-a843-f2185d7b9107                         |
|                       | disk.ephemeral.size: 7c3b61e8-0a51-491e-8536-83dbcb300974         |
|                       | disk.root.size: d6d48c4f-b6a8-418d-81f1-19d041e2f162              |
|                       | memory.usage: 76b9c892-96fb-4460-9304-15d4eddd6c86                |
|                       | memory: 477d55b6-d03e-41f0-8b88-1cb03e6b131c                      |
|                       | vcpus: 36195803-7a1c-443c-bef1-a20b5a067949                       |
| original_resource_id  | 6781b9c7-19c6-4419-a910-d0ae43c7526c                              |
| project_id            | 66102fdb888d4556a59dcff8b631ffdf                                  |
| revision_end          | None                                                              |
| revision_start        | 2022-05-05T15:31:25.767212+00:00                                  |
| started_at            | 2022-05-05T15:31:25.767200+00:00                                  |
| type                  | instance                                                          |
| user_id               | 74a373164921492ca35d32fea0fd2d86                                  |
+-----------------------+-------------------------------------------------------------------+

# CPU

ubuntu@dlp ~(keystone)$
openstack metric measures show cbd8fc75-0599-42b3-a843-f2185d7b9107

+---------------------------+-------------+---------------+
| timestamp                 | granularity |         value |
+---------------------------+-------------+---------------+
| 2022-05-05T15:35:00+00:00 |       300.0 | 82240000000.0 |
+---------------------------+-------------+---------------+

# memory usage

ubuntu@dlp ~(keystone)$
openstack metric measures show 76b9c892-96fb-4460-9304-15d4eddd6c86

+---------------------------+-------------+--------------+
| timestamp                 | granularity |        value |
+---------------------------+-------------+--------------+
| 2022-05-05T15:35:00+00:00 |       300.0 | 339.12109375 |
+---------------------------+-------------+--------------+

# details of [instance_network_interface]

ubuntu@dlp ~(keystone)$
openstack metric resource show e540d3c4-7e04-5ef8-8399-5b66d78d1056

+-----------------------+-----------------------------------------------------------------------+
| Field                 | Value                                                                 |
+-----------------------+-----------------------------------------------------------------------+
| created_by_project_id | c1c4d9a5313f43bd9f6f555e2d34ab28                                      |
| created_by_user_id    | 66d094f65ddd49ebb6e27f48ed2c6448                                      |
| creator               | 66d094f65ddd49ebb6e27f48ed2c6448:c1c4d9a5313f43bd9f6f555e2d34ab28     |
| ended_at              | None                                                                  |
| id                    | e540d3c4-7e04-5ef8-8399-5b66d78d1056                                  |
| metrics               | network.incoming.bytes: 403c2121-6164-4be1-9c77-fe3994f19900          |
|                       | network.incoming.packets: a2b000aa-bf4c-4eb7-a35d-9b44dda68072        |
|                       | network.outgoing.bytes: aa133fdd-107b-4fc7-ac9e-4c1edc01e2ff          |
|                       | network.outgoing.packets: 9d0e5e4e-1b55-453e-b956-0c7b00c526f6        |
| original_resource_id  | instance-00000001-6781b9c7-19c6-4419-a910-d0ae43c7526c-tapa1d93d65-68 |
| project_id            | 66102fdb888d4556a59dcff8b631ffdf                                      |
| revision_end          | None                                                                  |
| revision_start        | 2022-05-05T15:35:38.619523+00:00                                      |
| started_at            | 2022-05-05T15:35:38.619516+00:00                                      |
| type                  | instance_network_interface                                            |
| user_id               | 74a373164921492ca35d32fea0fd2d86                                      |
+-----------------------+-----------------------------------------------------------------------+

# display network incoming bytes

ubuntu@dlp ~(keystone)$
openstack metric measures show 403c2121-6164-4be1-9c77-fe3994f19900

+---------------------------+-------------+----------+
| timestamp                 | granularity |    value |
+---------------------------+-------------+----------+
| 2022-05-05T15:35:00+00:00 |       300.0 | 351330.0 |
+---------------------------+-------------+----------+

# display network outgoing bytes

ubuntu@dlp ~(keystone)$
openstack metric measures show aa133fdd-107b-4fc7-ac9e-4c1edc01e2ff

+---------------------------+-------------+------------+
| timestamp                 | granularity |      value |
+---------------------------+-------------+------------+
| 2022-05-05T15:35:00+00:00 |       300.0 | 23891607.0 |
+---------------------------+-------------+------------+
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