manila/releasenotes/notes/share-replication-81ecf4a32a5c83b6.yaml
Goutham Pacha Ravi f858e537dd 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
2016-02-11 19:45:37 +00:00

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YAML

---
features:
- Shares can be replicated. Replicas can be added, listed, queried for
detail, promoted to be 'active' or removed.