Deprecate allow_additional_image_properties

Registered by Brian Rosmaita on 2020-03-12

The allow_additional_image_properties configuration option was originally introduced to prevent users from flooding the image_properties table with junk. Given that we now have the image_property_quota option, allow_additional_image_properties is unnecessary. Further, if an operator were to set it False, all sorts of stuff would break as multiple OpenStack services (for example, Cinder, Nova) currently write/rely on custom image properties. So, Deprecate the allow_additional_image_properties in Ussuri scheduled for removal in the V development cycle, consistent with the standard OpenStack deprecation policy.

Blueprint information

Status:
Not started
Approver:
None
Priority:
Undefined
Drafter:
Brian Rosmaita
Direction:
Approved
Assignee:
Brian Rosmaita
Definition:
Approved
Series goal:
Accepted for ussuri
Implementation:
Unknown
Milestone target:
None

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Gerrit topic: https://review.opendev.org/#/q/topic:bp/deprecate-allow-custom-props

Addressed by: https://review.opendev.org/715062
    Deprecate allow_additional_image_properties

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