policy file in policy.d will be reloaded every rest api call

[Eli Qiao]

the policy file in policy.d will be reloaded every time when do a rest api call.

[Eli Qiao (taget-9)]

by checking code, we pass overwrite=False

                self._walk_through_policy_directory(path,
                                                    self._load_policy_file,
                                                    force_reload, False)

so _load_policy_file will reload the policy every time.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/168784

[Eli Qiao (taget-9)]

olso.policy patch.
https://review.openstack.org/#/c/168798/

[Sean Dague (sdague)]

raising this bug to critical in oslo, this causes an additional 33,000 policy file parses during a gate run in nova-api alone.

[Thomas Bechtold (toabctl)]

Fix seems to be merged with https://review.openstack.org/#/c/169535/

[Doug Hellmann (doug-hellmann)]

We need to back-port this change to the stable/kilo branch of oslo.policy and cut a release from there before anyone will see the fix.

[Doug Hellmann (doug-hellmann)]

The kilo backport patch is https://review.openstack.org/170863

[OpenStack Infra (hudson-openstack)]

Change abandoned by Eli Qiao (<email address hidden>) on branch: master
Review: https://review.openstack.org/168784
Reason: hope some one else have good propose

[Eli Qiao (taget-9)]

Nova reverts it to not use policy.d.
Sean doesn't agree to sync code from oslo.policy.
Then how to go in nova side.

[Sean Dague (sdague)]

This is addressed via oslo.policy

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/oslo.policy 0.3.2 release.