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Rajat Dhasmana abfb2c6061 Show volume attachment host information for services

When fetching the attachments associated with a volume, Cinder
only return the host information (host_name) if the request
is coming from an admin otherwise returns None.
This is the correct behavior but with a little caveat.
When Glance is configured to use Cinder as it's backend, it
also requires the volume attachment information to find out
which attachments exists for a specific host.
This helps make smart decisions on wheather we want to
disconnect a volume or not[1]. The problem currently is, the
``host_name`` field is not exposed to other openstack
services, like glance.
This patch enables services like Glance API to be able
to fetch the ``host_name`` information for attachments
by checking the ``service`` role in the context of the
request. This helps ensures any non-admin user, apart
from the admin or service category shouldn't be able
to view the ``host_name`` information for attachments.

[1] https://review.opendev.org/c/openstack/glance_store/+/962408

Change-Id: Icea868bf6619f3ab0a00c4e72185f07e66e4a932
Signed-off-by: Rajat Dhasmana <rajatdhasmana@gmail.com>

2025-10-04 22:43:43 +00:00