tree d7cf4384362117934c1216f088b2608e232fcd0e
parent 078f140ec49d80d4b2335cbb2fb34cabf28762a6
author Goutham Pacha Ravi <gouthamr@netapp.com> 1444740086 -0400
committer Goutham Pacha Ravi <gouthamr@netapp.com> 1455219937 +0000

Share Replication API and Scheduler Support

This patch provides the scheduler support to filter share
backends matching replication capabilities reported by the
hosts and the replication_type extra_spec provided via the
share_type during share creation.

It also adds wsgi routes, API endpoints and driver entry
routines to support the actions: list, show, create, delete
and promote share replicas. It augments the ShareInstance
DB model with a 'replica_state' attribute and the Share DB
Model with 'replication_type' attribute to support these
workflows.

Replica states are periodically updated from the respective
backends that the replicas are created on.

APIImpact
Impact on existing APIs:
In Microversion 2.11, the /shares APIs return 2 additional
fields during index and show calls for each share: 'has_replicas'
and 'replication_type'. Similarly, the field 'replica_state' is
added to the API response for /share-instances.
Also, deletion of a share that has replicas is forbidden,
returning error code 403.

DocImpact

Co-Authored-By: Alex Meade <mr.alex.meade@gmail.com>

Implements: blueprint manila-share-replication

Change-Id: I10515d55b1291c34777a31d8c6a3a1954f551235