When using DVR and L3HA neutron deployment options,
Nova API Metadata requests are served from compute nodes,
instead of from neutron-gateway nodes.
This change allows nova-cloud-controller to send vendor_data
configuration values to nova-compute charm relation so it
can write to nova-compute's nova.conf appropriately.
Replaced the existing context logic with inheritance
from a new context created in charm-helpers, so the
logic can be shared across several charms that write
vendor metadata to nova.conf and vendor_data.json.
Also, small fix in the vendor-data and vendor-data-url
descriptions, where it was incorrectly stating that such
configuration would be effective in nova-cloud-controller
on Queens release.
The values set in vendor-data and vendor-data-url config
options will always be propagated to nova-compute regardless
of the OpenStack release. Those values will continue to only
be effective in nova-cloud-controller nodes on Rocky release
or later.
Included sync of charm-helpers code in order to inherit
the refactored vendor metadata contexts.
Change-Id: If8373fc6b2d04dbc29ed07896d385ac920cae3f4
Depends-On: I0c79e1bfac9fbe7009a7e862ad010cfa2de8cfda
Closes-Bug: #1777714
a51efaf640