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OpenStack Bobcat : How to use Ceilometer (Nova Compute)2023/10/27

 
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  Nginx     |  |     Neutron Server    |  |      Nova Compute     |
|  Keystone   httpd     |  |      OVN-Northd       |  |      Open vSwitch     |
|  Glance     Nova API  |  |  Nginx  iSCSI Target  |  |   OVN Metadata Agent  |
|  Cinder API           |  |     Cinder Volume     |  |     OVN-Controller    |
|                       |  |     Gnocchi httpd     |  |   Ceilometer Compute  |
|                       |  |   Ceilometer Central  |  |                       |
+-----------------------+  +-----------------------+  +-----------------------+

[1] Change settings for Nova Compute service to enable Telemetry data collection like follows.
[root@node01 ~]#
vi /etc/nova/nova.conf
# add follows into the [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    |
+--------------------------------------+------------+---------+------------------------------------+----------------+-----------+
| 78b8c394-be14-4312-84e8-06eeebbd74f3 | CentOS-St9 | SHUTOFF | private=10.0.0.208, 192.168.100.63 | CentOS-Stream9 | m1.medium |
+--------------------------------------+------------+---------+------------------------------------+----------------+-----------+

[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                       
+--------------------------------------+----------------------------+----------------------------------
| 78b8c394-be14-4312-84e8-06eeebbd74f3 | instance                   | f4598dfd3b8a47149234b6892d18d5a4 
| c9aff847-aa53-5449-b384-1fcd612499fd | instance_network_interface | f4598dfd3b8a47149234b6892d18d5a4 
| e2b0e7f8-a93f-5ec4-851f-9e98ec9cd596 | instance_disk              | f4598dfd3b8a47149234b6892d18d5a4 
+--------------------------------------+----------------------------+----------------------------------
+----------------------------------+-----------------------------------------------------------------------
| user_id                          | original_resource_id                                                  
+----------------------------------+-----------------------------------------------------------------------
| d70a5f7908de4cd9aa8e189b725244a9 | 78b8c394-be14-4312-84e8-06eeebbd74f3                                  
| d70a5f7908de4cd9aa8e189b725244a9 | instance-00000001-78b8c394-be14-4312-84e8-06eeebbd74f3-tap73e294fe-61 
| d70a5f7908de4cd9aa8e189b725244a9 | 78b8c394-be14-4312-84e8-06eeebbd74f3-vda                              
+----------------------------------+-----------------------------------------------------------------------
+----------------------------------+----------+----------------------------------
| started_at                       | ended_at | revision_start                   
+----------------------------------+----------+----------------------------------
| 2023-10-27T00:46:12.063944+00:00 | None     | 2023-10-27T00:46:12.063949+00:00 
| 2023-10-27T00:48:58.483399+00:00 | None     | 2023-10-27T00:48:58.483407+00:00 
| 2023-10-27T00:48:58.516335+00:00 | None     | 2023-10-27T00:48:58.516342+00:00 
+----------------------------------+----------+----------------------------------
+--------------+-------------------------------------------------------------------+
| revision_end | creator                                                           |
+--------------+-------------------------------------------------------------------+
| None         | be0b90dfc5d24277ae1bfd45e4cac1f8:5d97881520b34e6bbf1f15e778c82fe4 |
| None         | be0b90dfc5d24277ae1bfd45e4cac1f8:5d97881520b34e6bbf1f15e778c82fe4 |
| None         | be0b90dfc5d24277ae1bfd45e4cac1f8:5d97881520b34e6bbf1f15e778c82fe4 |
+--------------+-------------------------------------------------------------------+

# details of the [instance] resource

[cent@dlp ~(keystone)]$
openstack metric resource show 78b8c394-be14-4312-84e8-06eeebbd74f3

+-----------------------+-------------------------------------------------------------------+
| Field                 | Value                                                             |
+-----------------------+-------------------------------------------------------------------+
| created_by_project_id | 5d97881520b34e6bbf1f15e778c82fe4                                  |
| created_by_user_id    | be0b90dfc5d24277ae1bfd45e4cac1f8                                  |
| creator               | be0b90dfc5d24277ae1bfd45e4cac1f8:5d97881520b34e6bbf1f15e778c82fe4 |
| ended_at              | None                                                              |
| id                    | 78b8c394-be14-4312-84e8-06eeebbd74f3                              |
| metrics               | cpu: 7a05ff65-e8c8-4bb3-9ef8-1d7e92ef438f                         |
|                       | disk.ephemeral.size: c99871a0-3322-4dcc-a14b-9bd29aaf74ec         |
|                       | disk.root.size: 2ff21655-808f-4fb7-a3ad-034027ab04a6              |
|                       | memory.usage: beafca0e-9997-4022-b84d-f8e30b8cc46e                |
|                       | memory: dc984331-bca1-4762-bac1-c05964724be4                      |
|                       | vcpus: bd31a3c6-dca1-4b99-b5a6-4fd95c7006cb                       |
| original_resource_id  | 78b8c394-be14-4312-84e8-06eeebbd74f3                              |
| project_id            | f4598dfd3b8a47149234b6892d18d5a4                                  |
| revision_end          | None                                                              |
| revision_start        | 2023-10-27T00:46:12.063949+00:00                                  |
| started_at            | 2023-10-27T00:46:12.063944+00:00                                  |
| type                  | instance                                                          |
| user_id               | d70a5f7908de4cd9aa8e189b725244a9                                  |
+-----------------------+-------------------------------------------------------------------+

# CPU

[cent@dlp ~(keystone)]$
openstack metric measures show 7a05ff65-e8c8-4bb3-9ef8-1d7e92ef438f

+---------------------------+-------------+---------------+
| timestamp                 | granularity |         value |
+---------------------------+-------------+---------------+
| 2023-10-27T09:45:00+09:00 |       300.0 | 63050000000.0 |
+---------------------------+-------------+---------------+

# memory usage

[cent@dlp ~(keystone)]$
openstack metric measures show beafca0e-9997-4022-b84d-f8e30b8cc46e

+---------------------------+-------------+-------------+
| timestamp                 | granularity |       value |
+---------------------------+-------------+-------------+
| 2023-10-27T09:45:00+09:00 |       300.0 | 449.2890625 |
+---------------------------+-------------+-------------+

# details of [instance_network_interface]

[cent@dlp ~(keystone)]$
openstack metric resource show c9aff847-aa53-5449-b384-1fcd612499fd

+-----------------------+-----------------------------------------------------------------------+
| Field                 | Value                                                                 |
+-----------------------+-----------------------------------------------------------------------+
| created_by_project_id | 5d97881520b34e6bbf1f15e778c82fe4                                      |
| created_by_user_id    | be0b90dfc5d24277ae1bfd45e4cac1f8                                      |
| creator               | be0b90dfc5d24277ae1bfd45e4cac1f8:5d97881520b34e6bbf1f15e778c82fe4     |
| ended_at              | None                                                                  |
| id                    | c9aff847-aa53-5449-b384-1fcd612499fd                                  |
| metrics               | network.incoming.bytes: c5d1881a-487f-4edb-894a-be198f1433dc          |
|                       | network.incoming.packets: cad56042-e3d5-481e-9977-6dbe672c935b        |
|                       | network.outgoing.bytes: 3ef07738-5589-4b32-9b7b-338398a50565          |
|                       | network.outgoing.packets: a5733184-b622-48a0-ae8d-b08728ef0ae8        |
| original_resource_id  | instance-00000001-78b8c394-be14-4312-84e8-06eeebbd74f3-tap73e294fe-61 |
| project_id            | f4598dfd3b8a47149234b6892d18d5a4                                      |
| revision_end          | None                                                                  |
| revision_start        | 2023-10-27T00:48:58.483407+00:00                                      |
| started_at            | 2023-10-27T00:48:58.483399+00:00                                      |
| type                  | instance_network_interface                                            |
| user_id               | d70a5f7908de4cd9aa8e189b725244a9                                      |
+-----------------------+-----------------------------------------------------------------------+

# display network incoming bytes

[cent@dlp ~(keystone)]$
openstack metric measures show c5d1881a-487f-4edb-894a-be198f1433dc

+---------------------------+-------------+-----------+
| timestamp                 | granularity |     value |
+---------------------------+-------------+-----------+
| 2023-10-27T09:45:00+09:00 |       300.0 | 2486616.0 |
+---------------------------+-------------+-----------+

# display network outgoing bytes

[cent@dlp ~(keystone)]$
openstack metric measures show 3ef07738-5589-4b32-9b7b-338398a50565

+---------------------------+-------------+----------+
| timestamp                 | granularity |    value |
+---------------------------+-------------+----------+
| 2023-10-27T09:45:00+09:00 |       300.0 | 118303.0 |
+---------------------------+-------------+----------+
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