The glance v1 API is deprecated and intended to be removed
from the glance code within the Queens or Rocky cycles.
When using the glance v2 API the glance-registry service is
optional, and the intention is to remove the glance-registry
service in the S cycle. The glance-registry service is required
when using the v1 API though.
Furthermore, when using the glance-registry service it is not
possible to execute a rolling upgrade without losing API
transactions.
Given the above information, this patch enables the deployment
of glance with only the v2 API enabled, and without the
glance-registry service. It adds a per-commit test to validate
that this configuration works.
This patch also corrects a previous misconfiguration which
enabled the v2 registry service, but did not set the data_api
correctly for the API service to inform it that the registry
was operating.
The glance_enable_v1_registry variable is also removed as it
is meaningless. The v1 API *requires* the registry to be
enabled, so we just enable it if glance_enable_v1_api is
enabled.
Change-Id: Ie95daed286798d139f0a35ffdd2a4dd1cdda6ff9
1416013cd4