[OpenStack] ResourceProviderCreationFailed:Failed to create resource provider 에러 해결 방법

원인

오픈스택에서 VM 생성 시 특정 호스트 서버에서 생성이 안되는 문제가 발생하여 nova-compute 로그를 확인해보니 아래 에러 로그가 있었습니다.

• ResourceProviderCreationFailed:Failed to create resource provider

해당 오류는 vm migration이나 evacuate 진행 시에 실패하여 오류로 있는 VM을 따로 처리하지 않고 삭제하여 발생하는 오류입니다.

해결 방법

오류에 대한 해결 방법을 버그 리포터에서 찾았는데 만약 해당 VM을 복원할 필요가 있는 경우 상당히 복잡합니다.

해당 방법은 해보지는 않았지만 일단 간략히 정리하고 자세한 과정은 https://bugzilla.redhat.com/show_bug.cgi?id=1774243#c2 에서 확인하시면 됩니다.

방법 1

• VM 복원이 필요하지 않을 때 사용하는 방법입니다.

# resource provider -> rp
$ openstack resource provider list --name $host_name
$ openstack resource provider show --allocations $rp_uuid # 이전 명령어에서 나온 uuid
$ openstack resource provider allocation delete $server_uuid  # 해당 rp에 할당된 서버 삭제
$ openstack resource provider delete $rp_uuid
$ systemctl restart nova-compute

방법 2

• VM 복원이 필요한 경우 사용하는 방법 입니다.

1. Get the resource provider UUID using the compute host name:
$ rp_uuid=$(openstack resource provider list --name compute-0 -f value -c uuid)

2. View the allocations for the compute host. This will show you all of the servers allocations:
$ openstack resource provider show --allocations $rp_uuid

3. Get a list of all servers running on the host:
$ openstack server list --host compute-0

4. For each server in the list:

4a. Get and **SAVE** the allocations for the server. You will need to restore them later:
$ openstack --os-placement-api-version 1.12 resource provider allocation show $server_uuid

4b. Delete the allocation for the server for compute-0:

If there was only one resource provider in the allocations from step 4a, delete all allocations on all compute hosts for the server:
$ openstack resource provider allocation delete $server_uuid

If there were multiple allocations in step 4a, delete only the allocation for compute-0 for the server by omitting $rp_uuid:
$ openstack --os-placement-api-version 1.12 resource provider allocation set $server_uuid \
    --project-id <project uuid from step 4a> \
    --user-id <user uuid from step 4a> \
    --allocation rp=<other rp uuid than compute host>,<resource class from step 4a>=<value from step 4a> \
    repeat --allocation for all the rest of the allocations for resource providers other than compute host

5. Once you have deleted and **SAVED** all the allocations from the servers on compute-0, delete the resource provider:
$ openstack resource provider delete $rp_uuid

6. Restart nova-compute. The resource providers should be re-created successfully.
$ systemctl restart nova-compute

7. Get the (new) resource provider UUID using the compute host name:
$ new_rp_uuid=$(openstack resource provider list --name compute-0 -f value -c uuid)

8. Restore all of the allocations for the servers on compute-0:

8a. Create (restore) the same allocations for the server on compute-0 that you **SAVED** from step 4a:
$ openstack --os-placement-api-version 1.12 resource provider allocation set $server_uuid \
    --project-id <project uuid from step 4a> \
    --user-id <user uuid from step 4a> \
    --allocation rp=$new_rp_uuid,<resource class from step 4a>=<value from step 4a> \
    repeat --allocation for all allocations you saved from step 4a

9. The compute host should now be recovered.