Hi,
no, it’s not a duplicate of #1839715 - I’ve seen that bug before I’ve posted this one.

+——+---------------+-----------------+----------------+-------+
| ID | Hypervisor Hostname | Hypervisor Type | Host IP        | State |
+----+---------------+-----------------+----------------+-------+
|  2 | compute1     | QEMU            | x.x.x.105 | up    |
|  3 | compute2     | QEMU            | x.x.x.106 | up    |
+----+--------------+-----------------+----------------+———+

where x.x.x.10x is INTERNAL_NET_IP

so all names match, masakari-manage/api/engine version is 10.0.2, masakari client 9.0.0-0ubuntu0.20.04.1, kolla-ansible Victoria (from source) on ubuntu 20.04. All hostnames resolvable (in /etc/hosts). Besides masakari the cloud works without any problems.
openstack service list -c Name
+-----------------+
| Name            |
+-----------------+
| cinderv3        |
| nova_legacy     |
| vitrage         |
| blazar          |
| swift           |
| magnum          |
| watcher         |
| gnocchi         |
| monasca-api     |
| senlin          |
| heat            |
| aodh            |
| barbican        |
| neutron         |
| placement       |
| designate       |
| cinderv2        |
| keystone        |
| heat-cfn        |
| octavia         |
| glance          |
| nova            |
| cloudkitty      |
| masakari        |
| monasca-log-api |
| panko           |
| mistral         |
+————————+


> Wiadomość napisana przez suzhengwei <email address hidden> w dniu 10.08.2021, o godz. 09:12:
> 
> Need infomations as following to identify it whether duplicated with #1839715.
> 1.Which branch of Masakari is used?
> 2.What is the output of command 'nova hypervisor-list'?
> 
> -- 
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1939291
> 
> Title:
>  Can't add host to masakari segment - "Compute service with name XXXX
>  could not be found"
> 
> Status in masakari:
>  New
> 
> Bug description:
>  In kolla-ansible multinode environment I can't add any host to
>  masakari segment.
> 
>  openstack segment host create compute1 COMPUTE SSH SEGMENT_ID
> 
>  ends with
> 
>  BadRequestException: 400: Client Error for url:
>  http://INTERNAL_NET_IP:15868/v1/segments/SEGMENT_ID/hosts, Compute
>  service with name compute1 could not be found.
> 
>  At the same time nova returns proper values for GET/os-services
> 
>  openstack compute service list
> 
>  +----+----------------+-------------+----------+---------+-------+----------------------------+
>  | ID | Binary         | Host        | Zone     | Status  | State | Updated At                 |
>  +----+----------------+-------------+----------+---------+-------+----------------------------+
>  |  2 | nova-scheduler | controller1 | internal | enabled | up    | 2021-08-09T11:08:16.000000 |
>  | 12 | nova-scheduler | controller2 | internal | enabled | up    | 2021-08-09T11:08:16.000000 |
>  | 31 | nova-scheduler | controller3 | internal | enabled | up    | 2021-08-09T11:08:18.000000 |
>  |  2 | nova-conductor | controller1 | internal | enabled | up    | 2021-08-09T11:08:16.000000 |
>  | 10 | nova-conductor | controller2 | internal | enabled | up    | 2021-08-09T11:08:12.000000 |
>  | 20 | nova-compute   | compute1    | nova     | enabled | up    | 2021-08-09T11:08:11.000000 |
>  | 21 | nova-compute   | compute2    | nova     | enabled | up    | 2021-08-09T11:08:16.000000 |
>  | 25 | nova-conductor | controller3 | internal | enabled | up    | 2021-08-09T11:08:17.000000 |
>  +----+----------------+-------------+----------+---------+-------+----------------------------+
> 
>  nova service-list
> 
>  +--------------------------------------+----------------+--------------------+----------+---------+-------+----------------------------+-----------------+-------------+
>  | Id                                   | Binary         | Host               | Zone     | Status  | State | Updated_at                 | Disabled Reason | Forced down |
>  +--------------------------------------+----------------+--------------------+----------+---------+-------+----------------------------+-----------------+-------------+
>  | 1 | nova-scheduler | controller1 | internal | enabled | up    | 2021-08-09T11:10:10.000000 | -               | False       |
>  | 2 | nova-scheduler | controller2 | internal | enabled | up    | 2021-08-09T11:10:12.000000 | -               | False       |
>  | 3 | nova-scheduler | controller3 | internal | enabled | up    | 2021-08-09T11:10:08.000000 | -               | False       |
>  | 4 | nova-conductor | controller1 | internal | enabled | up    | 2021-08-09T11:10:06.000000 | -               | False       |
>  | 5 | nova-conductor | controller2 | internal | enabled | up    | 2021-08-09T11:10:12.000000 | -               | False       |
>  | 6 | nova-compute   | compute1    | nova     | enabled | up    | 2021-08-09T11:10:11.000000 | -               | False       |
>  | 7 | nova-compute   | compute2    | nova     | enabled | up    | 2021-08-09T11:10:06.000000 | -               | False       |
>  | 8 | nova-conductor | controller3 | internal | enabled | up    | 2021-08-09T11:10:11.000000 | -               | False       |
>  +--------------------------------------+----------------+--------------------+----------+---------+-------+----------------------------+-----------------+-------------+
> 
>  masakari-wsgi.log on controller1 (similar on controllers2 and 3)
> 
>  2021-08-09 08:26:35.639 957 DEBUG masakari.api.openstack.wsgi [req-456c44cd-4bfd-43c7-8697-ede2943418b3 9fea0ade15644c78b5a1a4166b0256f7 775839ee714f4dfa85975b4b61adc778 - - -] Returning 400 to user: Host with name compute1 could not be found. __call__ /var/lib/kolla/venv/lib/python3.8/site-packages/masakari/api/openstack/wsgi.py:1038
>  2021-08-09 08:26:45.625 960 DEBUG masakari.api.openstack.wsgi [req-21c1c424-5725-4661-a0aa-c70f4dbb6895 9fea0ade15644c78b5a1a4166b0256f7 775839ee714f4dfa85975b4b61adc778 - - -] Action: 'create', calling method: <bound method NotificationsController.create of <masakari.api.openstack.ha.notifications.NotificationsController object at 0x7fbe8fef7220>>, body: {"notification": {"hostname": "compute1", "generated_time": "2021-08-09T08:25:14.667141", "type": "VM", "payload": {"event": "IO_ERROR_REASON", "instance_uuid": "025e08fa-9606-4bcd-a398-b6ebea9b3adb", "vir_domain_event": "UNKNOWN"}}} _process_stack /var/lib/kolla/venv/lib/python3.8/site-packages/masakari/api/openstack/wsgi.py:619
>  2021-08-09 08:26:45.641 960 INFO masakari.api.openstack.wsgi [req-21c1c424-5725-4661-a0aa-c70f4dbb6895 9fea0ade15644c78b5a1a4166b0256f7 775839ee714f4dfa85975b4b61adc778 - - -] HTTP exception thrown: Host with name compute1 could not be found.
>  2021-08-09 08:26:45.642 960 DEBUG masakari.api.openstack.wsgi [req-21c1c424-5725-4661-a0aa-c70f4dbb6895 9fea0ade15644c78b5a1a4166b0256f7 775839ee714f4dfa85975b4b61adc778 - - -] Returning 400 to user: Host with name compute1 could not be found. __call__ /var/lib/kolla/venv/lib/python3.8/site-packages/masakari/api/openstack/wsgi.py:1038
>  2021-08-09 08:26:45.787 958 DEBUG masakari.api.openstack.wsgi [req-a48afd1f-60be-4a7f-892b-ecbea4309fe9 9fea0ade15644c78b5a1a4166b0256f7 775839ee714f4dfa85975b4b61adc778 - - -] Action: 'create', calling method: <bound method NotificationsController.create of <masakari.api.openstack.ha.notifications.NotificationsController object at 0x7fbe8ff38940>>, body: {"notification": {"hostname": "compute1", "generated_time": "2021-08-09T08:25:14.663507", "type": "VM", "payload": {"event": "IO_ERROR", "instance_uuid": "025e08fa-9606-4bcd-a398-b6ebea9b3adb", "vir_domain_event": "IO_ERROR_REPORT"}}} _process_stack /var/lib/kolla/venv/lib/python3.8/site-packages/masakari/api/openstack/wsgi.py:619
>  2021-08-09 08:26:45.804 958 INFO masakari.api.openstack.wsgi [req-a48afd1f-60be-4a7f-892b-ecbea4309fe9 9fea0ade15644c78b5a1a4166b0256f7 775839ee714f4dfa85975b4b61adc778 - - -] HTTP exception thrown: Host with name compute1 could not be found.
>  2021-08-09 08:26:45.804 958 DEBUG masakari.api.openstack.wsgi [req-a48afd1f-60be-4a7f-892b-ecbea4309fe9 9fea0ade15644c78b5a1a4166b0256f7 775839ee714f4dfa85975b4b61adc778 - - -] Returning 400 to user: Host with name compute1 could not be found. __call__ /var/lib/kolla/venv/lib/python3.8/site-packages/masakari/api/openstack/wsgi.py:1038
> 
>  openstack --debug segment host create compute1 COMPUTE SSH SEGMENT_ID
> 
>  START with options: --debug segment host create compute1 COMPUTE SSH
>  SEGMENT_ID
> 
>  (...) OUTPUT OMITTED
> 
>  Auth plugin password selected
> 
>  (...) OUTPUT OMITTED
> 
>  compute API version 2.1, cmd group openstack.compute.v2
>  identity API version 3, cmd group openstack.identity.v3
>  image API version 2, cmd group openstack.image.v2
>  network API version 2, cmd group openstack.network.v2
>  object_store API version 1, cmd group openstack.object_store.v1
>  volume API version 3, cmd group openstack.volume.v3
>  ha API version 1.1, cmd group openstack.ha.v1
>  infra-optim API version 1, cmd group openstack.infra_optim.v1
>  clustering API version 1, cmd group openstack.clustering.v1
>  load_balancer API version 2.0, cmd group openstack.load_balancer.v2
>  neutronclient API version 2, cmd group openstack.neutronclient.v2
>  workflow_engine API version 2, cmd group openstack.workflow_engine.v2
>  container_infra API version 1, cmd group openstack.container_infra.v1
>  orchestration API version 1, cmd group openstack.orchestration.v1
>  dns API version 2, cmd group openstack.dns.v2
>  rating API version 1, cmd group openstack.rating.v1
>  metric API version 1, cmd group openstack.metric.v1
>  alarming API version 2, cmd group openstack.alarming.v2
>  command: segment host create -> masakariclient.osc.v1.host.CreateHost (auth=True)
>  Auth plugin password selected
> 
>  (...) OUTPUT OMITTED
> 
>  Using auth plugin: password
>  Using parameters {'auth_url': 'http://INETRNAL_NET_IP:35357/v3', 'project_name': 'admin', 'project_domain_name': 'Default', 'username': 'admin', 'user_domain_name': 'Default', 'password': '***'}
>  Get auth_ref
>  REQ: curl -g -i -X GET http://INETRNAL_NET_IP:35357/v3 -H "Accept: application/json" -H "User-Agent: openstacksdk/0.46.0 keystoneauth1/4.0.0 python-requests/2.22.0 CPython/3.8.10"
>  Starting new HTTP connection (1): INETRNAL_NET_IP:35357
>  http://INETRNAL_NET_IP:35357 "GET /v3 HTTP/1.1" 200 255
>  RESP: [200] content-length: 255 content-type: application/json date: Mon, 09 Aug 2021 11:28:36 GMT server: Apache vary: X-Auth-Token x-openstack-request-id: req-7036bb8e-4033-4194-8cef-e1b00f5c7b08
>  RESP BODY: {"version": {"id": "v3.14", "status": "stable", "updated": "2020-04-07T00:00:00Z", "links": [{"rel": "self", "href": "http://INETRNAL_NET_IP:35357/v3/"}], "media-types": [{"base": "application/json", "type": "application/vnd.openstack.identity-v3+json"}]}}
>  GET call to http://INETRNAL_NET_IP:35357/v3 used request id req-7036bb8e-4033-4194-8cef-e1b00f5c7b08
>  Making authentication request to http://INETRNAL_NET_IP:35357/v3/auth/tokens
>  http://INETRNAL_NET_IP:35357 "POST /v3/auth/tokens HTTP/1.1" 201 25266
> 
>  (...) OUTPUT OMITTED
> 
>  run(Namespace(columns=[], control_attributes='SSH', fit_width=False, formatter='table', max_width=0, name='compute1', noindent=False, on_maintenance=None, prefix='', print_empty=False, reserved=None, segment_id='SEGMENT_ID', type='COMPUTE', variables=[]))
>  Instantiating masakari service client: <class 'masakariclient.v1.client.Client'>
>  Making authentication request to http://INETRNAL_NET_IP:35357/v3/auth/tokens
>  http://INETRNAL_NET_IP:35357 "POST /v3/auth/tokens HTTP/1.1" 201 25266
> 
>  (...) OUTPUT OMITTED
> 
>  REQ: curl -g -i -X GET http://INETRNAL_NET_IP:15868 -H "Accept: application/json" -H "User-Agent: openstacksdk/0.46.0 keystoneauth1/4.0.0 python-requests/2.22.0 CPython/3.8.10"
>  Starting new HTTP connection (1): INETRNAL_NET_IP:15868
>  http://INETRNAL_NET_IP:15868 "GET / HTTP/1.1" 200 197
>  RESP: [200] content-length: 197 content-type: application/json date: Mon, 09 Aug 2021 11:28:37 GMT server: Apache
>  RESP BODY: {"versions": [{"id": "v1.0", "status": "CURRENT", "version": "1.1", "min_version": "1.0", "updated": "2016-07-01T11:33:21Z", "links": [{"rel": "self", "href": "http://INETRNAL_NET_IP:15868/v1/"}]}]}
>  REQ: curl -g -i -X POST http://INETRNAL_NET_IP:15868/v1/segments/SEGMENT_ID/hosts -H "Content-Type: application/json" -H "OpenStack-API-Version: instance-ha 1.1" -H "User-Agent: openstacksdk/0.46.0 keystoneauth1/4.0.0 python-requests/2.22.0 CPython/3.8.10" -H "X-Auth-Token: {SHA256}c34ac4e56c10325ea90f8e659582a5230ee4901ac7ce1a9a58494c8655eaf202" -d '{"host": {"control_attributes": "SSH", "name": "compute1", "type": "COMPUTE"}}'
>  http://INETRNAL_NET_IP:15868 "POST /v1/segments/SEGMENT_ID/hosts HTTP/1.1" 400 105
>  RESP: [400] content-length: 105 content-type: application/json; charset=UTF-8 date: Mon, 09 Aug 2021 11:28:37 GMT openstack-api-version: instance-ha 1.1 server: Apache vary: OpenStack-API-Version x-openstack-request-id: req-298f0f37-6e46-4e5b-95c9-f0aff014d144
>  RESP BODY: {"badRequest": {"code": 400, "message": "Compute service with name compute1 could not be found."}}
>  POST call to instance-ha for http://INETRNAL_NET_IP:15868/v1/segments/SEGMENT_ID/hosts used request id req-298f0f37-6e46-4e5b-95c9-f0aff014d144
>  Failed to create segment host: Namespace(columns=[], control_attributes='SSH', fit_width=False, formatter='table', max_width=0, name='compute1', noindent=False, on_maintenance=None, prefix='', print_empty=False, reserved=None, segment_id='SEGMENT_ID', type='COMPUTE', variables=[])
>  BadRequestException: 400: Client Error for url: http://INETRNAL_NET_IP:15868/v1/segments/SEGMENT_ID/hosts, Compute service with name compute1 could not be found.
>  Traceback (most recent call last):
>    File "/usr/lib/python3/dist-packages/cliff/app.py", line 400, in run_subcommand
>      result = cmd.run(parsed_args)
>    File "/usr/lib/python3/dist-packages/osc_lib/command/command.py", line 41, in run
>      return super(Command, self).run(parsed_args)
>    File "/usr/lib/python3/dist-packages/cliff/display.py", line 117, in run
>      column_names, data = self.take_action(parsed_args)
>    File "/usr/local/lib/python3.8/dist-packages/masakariclient/osc/v1/host.py", line 177, in take_action
>      raise ex
>    File "/usr/local/lib/python3.8/dist-packages/masakariclient/osc/v1/host.py", line 172, in take_action
>      host = masakari_client.create_host(
>    File "/usr/lib/python3/dist-packages/openstack/instance_ha/v1/_proxy.py", line 152, in create_host
>      return self._create(_host.Host, segment_id=segment_id, **attrs)
>    File "/usr/lib/python3/dist-packages/openstack/proxy.py", line 417, in _create
>      return res.create(self, base_path=base_path)
>    File "/usr/lib/python3/dist-packages/openstack/resource.py", line 1291, in create
>      self._translate_response(response, has_body=has_body)
>    File "/usr/lib/python3/dist-packages/openstack/resource.py", line 1113, in _translate_response
>      exceptions.raise_from_response(response, error_message=error_message)
>    File "/usr/lib/python3/dist-packages/openstack/exceptions.py", line 234, in raise_from_response
>      raise cls(
>  openstack.exceptions.BadRequestException: BadRequestException: 400: Client Error for url: http://INETRNAL_NET_IP:15868/v1/segments/SEGMENT_ID/hosts, Compute service with name compute1 could not be found.
>  clean_up CreateHost: BadRequestException: 400: Client Error for url: http://INETRNAL_NET_IP:15868/v1/segments/SEGMENT_ID/hosts, Compute service with name compute1 could not be found.
>  END return value: 1
> 
>  Masakari containers built from latest images, the same configuration running in RegionTwo works, but RegionTwo is all-in-one and does not use FQDNs, only IPs. Still - all FQDNs in RegionOne are resolved without any problems (via /etc/hosts on each node).
>  Masakari was completely removed (deleted containers and images, masakari database and all configuration files) and deployed again with the same result. What else can I do?
> 
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/masakari/+bug/1939291/+subscriptions
>