Commits on Mar 10, 2021

1. [SAP] Added admins view all volume_admin_metadata …

   This patch adds the ability for admins to view
   volume_admin_metadata when fetching volumes from the API.
   
   This patch ensures that ensure_export at init_host time can
   do a model update.
   
   referencing:
   https://review.opendev.org/c/openstack/cinder/+/779835
   
   This patch slightly refactors create_export, ensure_export and
   initialize_connection to allow saving a model_update back for each
   of those calls.
   
   The model update returns some vital information about the volume,
   the vcenter uuid, the datastore name, and the vcenter storage profile
   associated with that volume.  That information is stored in the
   volume_admin_metadata table as key/value pairs that are then returned
   (for admin users) when a volume list or show is called from the API.
   
   ensure_export is called for every in-use, available volume at cinder
   startup.  So existing volumes will get updated in the db at
   cinder startup.
   
   We will then be able to update the host entries later if/when we
   migrate to supporting datastores as pools.  Each volume will need
   to get updated to change its host entry to include the pool name
   (datastore name) as part of the host entry, so cinder knows which
   cinder-volume service instance manages that specific volume.

   

   hemna committed Mar 10, 2021
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