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OpenStack Yoga : How to use Ceilometer (Nova Compute)2022/06/13

 
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 collection 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 openstack-nova-compute

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

[cent@dlp ~(keystone)]$
openstack server list

+--------------------------------------+------------+---------+-------------------------------------+----------------+----------+
| ID                                   | Name       | Status  | Networks                            | Image          | Flavor   |
+--------------------------------------+------------+---------+-------------------------------------+----------------+----------+
| 25ef320e-b16e-4085-96ef-af7fa0d33cfb | CentOS-St9 | SHUTOFF | private=10.0.0.242, 192.168.100.214 | CentOS-Stream9 | m1.small |
+--------------------------------------+------------+---------+-------------------------------------+----------------+----------+

[cent@dlp ~(keystone)]$
openstack server start CentOS-St9
# list resources
# data are stored after some operations are done on instance

[cent@dlp ~(keystone)]$
openstack metric resource list

+--------------------------------------+----------------------------+----------------------------------
| id                                   | type                       | project_id                       
+--------------------------------------+----------------------------+----------------------------------
| 25ef320e-b16e-4085-96ef-af7fa0d33cfb | instance                   | 911e5ff7686741c782d6acc6d7155db1 
| f7e5361a-fd6c-568a-a718-0168c5ae2c65 | instance_network_interface | 911e5ff7686741c782d6acc6d7155db1 
| 4f70f768-ed81-58c8-be82-704e89dfc79d | instance_disk              | 911e5ff7686741c782d6acc6d7155db1 
+--------------------------------------+----------------------------+----------------------------------
+----------------------------------+-----------------------------------------------------------------------
| user_id                          | original_resource_id                                                  
+----------------------------------+-----------------------------------------------------------------------
| 1ff4591a7f8140fcad38fd9f606a66a6 | 25ef320e-b16e-4085-96ef-af7fa0d33cfb                                  
| 1ff4591a7f8140fcad38fd9f606a66a6 | instance-00000001-25ef320e-b16e-4085-96ef-af7fa0d33cfb-tap323ddce5-ae 
| 1ff4591a7f8140fcad38fd9f606a66a6 | 25ef320e-b16e-4085-96ef-af7fa0d33cfb-vda                              
+----------------------------------+-----------------------------------------------------------------------
+----------------------------------+----------+----------------------------------+--------------
| started_at                       | ended_at | revision_start                   | revision_end 
+----------------------------------+----------+----------------------------------+--------------
| 2022-06-13T06:00:03.539975+00:00 | None     | 2022-06-13T06:00:03.539983+00:00 | None         
| 2022-06-13T06:01:00.129895+00:00 | None     | 2022-06-13T06:01:00.129902+00:00 | None         
| 2022-06-13T06:01:00.134739+00:00 | None     | 2022-06-13T06:01:00.134746+00:00 | None         
+----------------------------------+----------+----------------------------------+--------------
+-------------------------------------------------------------------+
| creator                                                           |
+-------------------------------------------------------------------+
| efeba9b14c234edbb78d0cbad397e6ed:0f2625947bf0433a9519ba8a29434bdf |
| efeba9b14c234edbb78d0cbad397e6ed:0f2625947bf0433a9519ba8a29434bdf |
| efeba9b14c234edbb78d0cbad397e6ed:0f2625947bf0433a9519ba8a29434bdf |
+-------------------------------------------------------------------+

# details of the [instance] resource

[cent@dlp ~(keystone)]$
openstack metric resource show 25ef320e-b16e-4085-96ef-af7fa0d33cfb

+-----------------------+-------------------------------------------------------------------+
| Field                 | Value                                                             |
+-----------------------+-------------------------------------------------------------------+
| created_by_project_id | 0f2625947bf0433a9519ba8a29434bdf                                  |
| created_by_user_id    | efeba9b14c234edbb78d0cbad397e6ed                                  |
| creator               | efeba9b14c234edbb78d0cbad397e6ed:0f2625947bf0433a9519ba8a29434bdf |
| ended_at              | None                                                              |
| id                    | 25ef320e-b16e-4085-96ef-af7fa0d33cfb                              |
| metrics               | cpu: bb708009-8f63-4b67-8c7d-f55469a5c77e                         |
|                       | disk.ephemeral.size: a13e1ac6-6542-47cc-a10c-96d0ef2d6511         |
|                       | disk.root.size: 02a3e2a2-9253-417b-9db0-93d209fab14e              |
|                       | memory.usage: 5b6d2405-ef89-47da-842c-e05f38451fde                |
|                       | memory: 487137f4-5dd6-437c-8530-e8cffd6b699a                      |
|                       | vcpus: db1e9f4e-0f28-4db9-ae35-2d04e46f022f                       |
| original_resource_id  | 25ef320e-b16e-4085-96ef-af7fa0d33cfb                              |
| project_id            | 911e5ff7686741c782d6acc6d7155db1                                  |
| revision_end          | None                                                              |
| revision_start        | 2022-06-13T06:00:03.539983+00:00                                  |
| started_at            | 2022-06-13T06:00:03.539975+00:00                                  |
| type                  | instance                                                          |
| user_id               | 1ff4591a7f8140fcad38fd9f606a66a6                                  |
+-----------------------+-------------------------------------------------------------------+

# CPU

[cent@dlp ~(keystone)]$
openstack metric measures show bb708009-8f63-4b67-8c7d-f55469a5c77e

+---------------------------+-------------+----------------+
| timestamp                 | granularity |          value |
+---------------------------+-------------+----------------+
| 2022-06-13T15:00:00+09:00 |       300.0 |  28350000000.0 |
| 2022-06-13T15:05:00+09:00 |       300.0 | 212900000000.0 |
+---------------------------+-------------+----------------+

# memory usage

[cent@dlp ~(keystone)]$
openstack metric measures show 5b6d2405-ef89-47da-842c-e05f38451fde

+---------------------------+-------------+-------------+
| timestamp                 | granularity |       value |
+---------------------------+-------------+-------------+
| 2022-06-13T15:00:00+09:00 |       300.0 | 295.0234375 |
| 2022-06-13T15:05:00+09:00 |       300.0 | 342.8515625 |
+---------------------------+-------------+-------------+

# details of [instance_network_interface]

[cent@dlp ~(keystone)]$
openstack metric resource show f7e5361a-fd6c-568a-a718-0168c5ae2c65

+-----------------------+-----------------------------------------------------------------------+
| Field                 | Value                                                                 |
+-----------------------+-----------------------------------------------------------------------+
| created_by_project_id | 0f2625947bf0433a9519ba8a29434bdf                                      |
| created_by_user_id    | efeba9b14c234edbb78d0cbad397e6ed                                      |
| creator               | efeba9b14c234edbb78d0cbad397e6ed:0f2625947bf0433a9519ba8a29434bdf     |
| ended_at              | None                                                                  |
| id                    | f7e5361a-fd6c-568a-a718-0168c5ae2c65                                  |
| metrics               | network.incoming.bytes: a9000ff7-ea8e-49c7-a874-38b93d2ab141          |
|                       | network.incoming.packets: 2285ec64-e2e3-4958-a124-f13cbe0e7a81        |
|                       | network.outgoing.bytes: 4454fc2d-69b1-4da4-a58f-d4e29aa8d9e8          |
|                       | network.outgoing.packets: 4df12f90-27b7-4b6c-b0cf-fc3400b79e3f        |
| original_resource_id  | instance-00000001-25ef320e-b16e-4085-96ef-af7fa0d33cfb-tap323ddce5-ae |
| project_id            | 911e5ff7686741c782d6acc6d7155db1                                      |
| revision_end          | None                                                                  |
| revision_start        | 2022-06-13T06:01:00.129902+00:00                                      |
| started_at            | 2022-06-13T06:01:00.129895+00:00                                      |
| type                  | instance_network_interface                                            |
| user_id               | 1ff4591a7f8140fcad38fd9f606a66a6                                      |
+-----------------------+-----------------------------------------------------------------------+

# display network incoming bytes

[cent@dlp ~(keystone)]$
openstack metric measures show a9000ff7-ea8e-49c7-a874-38b93d2ab141

+---------------------------+-------------+----------+
| timestamp                 | granularity |    value |
+---------------------------+-------------+----------+
| 2022-06-13T15:00:00+09:00 |       300.0 |  14533.0 |
| 2022-06-13T15:05:00+09:00 |       300.0 | 868839.0 |
+---------------------------+-------------+----------+

# display network outgoing bytes

[cent@dlp ~(keystone)]$
openstack metric measures show 4454fc2d-69b1-4da4-a58f-d4e29aa8d9e8

+---------------------------+-------------+------------+
| timestamp                 | granularity |      value |
+---------------------------+-------------+------------+
| 2022-06-13T15:00:00+09:00 |       300.0 |    26738.0 |
| 2022-06-13T15:05:00+09:00 |       300.0 | 89897276.0 |
+---------------------------+-------------+------------+
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