nova-compute fails to start even if [placement]/region_name is set

[Matt Riedemann]

Change https://review.openstack.org/#/c/492247/ in queens deprecated the [placement]/os_region_name config option and you should be using 'region_name' in that group now, and you'll get a deprecation warning if using 'os_region_name', but if you do that, nova-compute fails to start, as seen here:

http://logs.openstack.org/77/554577/1/check/tempest-full-py3/df52956/controller/logs/screen-n-cpu.txt.gz#_Mar_20_15_16_30_122538

Mar 20 15:16:30.122538 ubuntu-xenial-ovh-gra1-0003080089 nova-compute[19979]: ERROR oslo_service.service [None req-19eb4465-6304-40fe-bb23-4bc7ce96f03a None None] Error starting thread.: nova.exception.PlacementNotConfigured: This compute is not configured to talk to the placement service. Configure the [placement] section of nova.conf and restart the service.
Mar 20 15:16:30.122790 ubuntu-xenial-ovh-gra1-0003080089 nova-compute[19979]: ERROR oslo_service.service Traceback (most recent call last):
Mar 20 15:16:30.122925 ubuntu-xenial-ovh-gra1-0003080089 nova-compute[19979]: ERROR oslo_service.service File "/usr/local/lib/python3.5/dist-packages/oslo_service/service.py", line 729, in run_service
Mar 20 15:16:30.123087 ubuntu-xenial-ovh-gra1-0003080089 nova-compute[19979]: ERROR oslo_service.service service.start()
Mar 20 15:16:30.123219 ubuntu-xenial-ovh-gra1-0003080089 nova-compute[19979]: ERROR oslo_service.service File "/opt/stack/nova/nova/service.py", line 162, in start
Mar 20 15:16:30.123348 ubuntu-xenial-ovh-gra1-0003080089 nova-compute[19979]: ERROR oslo_service.service self.manager.init_host()
Mar 20 15:16:30.123484 ubuntu-xenial-ovh-gra1-0003080089 nova-compute[19979]: ERROR oslo_service.service File "/opt/stack/nova/nova/compute/manager.py", line 1135, in init_host
Mar 20 15:16:30.123628 ubuntu-xenial-ovh-gra1-0003080089 nova-compute[19979]: ERROR oslo_service.service raise exception.PlacementNotConfigured()
Mar 20 15:16:30.123749 ubuntu-xenial-ovh-gra1-0003080089 nova-compute[19979]: ERROR oslo_service.service nova.exception.PlacementNotConfigured: This compute is not configured to talk to the placement service. Configure the [placement] section of nova.conf and restart the service.
Mar 20 15:16:30.123870 ubuntu-xenial-ovh-gra1-0003080089 nova-compute[19979]: ERROR oslo_service.service

From the config:

Mar 20 15:16:30.044109 ubuntu-xenial-ovh-gra1-0003080089 nova-compute[19979]: DEBUG oslo_service.service [None req-19eb4465-6304-40fe-bb23-4bc7ce96f03a None None] placement.os_region_name = None {{(pid=19979) log_opt_values /usr/local/lib/python3.5/dist-packages/oslo_config/cfg.py:2898}}
Mar 20 15:16:30.044351 ubuntu-xenial-ovh-gra1-0003080089 nova-compute[19979]: DEBUG oslo_service.service [None req-19eb4465-6304-40fe-bb23-4bc7ce96f03a None None] placement.randomize_allocation_candidates = False {{(pid=19979) log_opt_values /usr/local/lib/python3.5/dist-packages/oslo_config/cfg.py:2898}}
Mar 20 15:16:30.044612 ubuntu-xenial-ovh-gra1-0003080089 nova-compute[19979]: DEBUG oslo_service.service [None req-19eb4465-6304-40fe-bb23-4bc7ce96f03a None None] placement.region_name = RegionOne {{(pid=19979) log_opt_values /usr/local/lib/python3.5/dist-packages/oslo_config/cfg.py:2898}}

And this is the code that fails:

https://github.com/openstack/nova/blob/3fd863d8bf2fa1fc09acd08d976689462cffd2e3/nova/compute/manager.py#L1134

That needs to be changed to:

if CONF.placement.os_region_name is None and CONF.placement.region_name is None:
   ...

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/554759

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/554759
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=be9854b0fdff22a72a9699a0900e53e0595bd533
Submitter: Zuul
Branch: master

commit be9854b0fdff22a72a9699a0900e53e0595bd533
Author: Kevin_Zheng <email address hidden>
Date: Wed Mar 21 09:43:21 2018 +0800

    Change compute mgr placement check to region_name

    Change https://review.openstack.org/#/c/492247/ in queens deprecated the
    [placement]/os_region_name config option and you should be using
    'region_name' in that group now, and you'll get a deprecation warning if
    using 'os_region_name', but if you do that, nova-compute fails to start.

    This patch fix the bug by adding [placement]/region_name to the check.

    Change-Id: Iea7d5d0d6907adbcb236dc43b5af7469de2ba78b
    Closes-Bug: #1757273

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/555901
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=505ba2a74a5496ce0975a3d512bd8cdeb4e7d55c
Submitter: Zuul
Branch: stable/queens

commit 505ba2a74a5496ce0975a3d512bd8cdeb4e7d55c
Author: Kevin_Zheng <email address hidden>
Date: Wed Mar 21 09:43:21 2018 +0800

    Change compute mgr placement check to region_name

    Change https://review.openstack.org/#/c/492247/ in queens deprecated the
    [placement]/os_region_name config option and you should be using
    'region_name' in that group now, and you'll get a deprecation warning if
    using 'os_region_name', but if you do that, nova-compute fails to start.

    This patch fix the bug by adding [placement]/region_name to the check.

    Change-Id: Iea7d5d0d6907adbcb236dc43b5af7469de2ba78b
    Closes-Bug: #1757273
    (cherry picked from commit be9854b0fdff22a72a9699a0900e53e0595bd533)

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/nova 17.0.2 release.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/nova 18.0.0.0b1 development milestone.