.. -*- rst -*-
===================================
Share replicas (Since version 2.11)
===================================
Share replicas are the replicated copies of the existing share. You can use
Share Replicas to sync data so that each share replica has an identical copy
of the same share. Share replication can be used as a disaster recovery
solution or as a load sharing mirroring solution.
Manila supports replication of shares between different storage pools.
These pools may be on different back-end storage systems or within the same
back end, depending upon the replication style chosen, the capability of
the driver and the configuration of back ends. To ensure that a secondary
copy is scheduled to a distinct back end, you must specify the
``availability_zone`` attribute.
.. note::
You can create a replicated share with the help of a share type
that has an extra-spec ``replication_type`` specified with a valid
replication style. Once a replicated share has been created,
it always starts out with an ``active`` replica. You may then create
secondary copies of the share. A secondary copy can be "promoted"
to fail-over to becoming the ``active`` replica.
To create a share that supports replication, the share type must specify
one of these supported replication types:
- writable
Synchronously replicated shares where all replicas are writable.
Promotion is not supported and not needed because all copies are already
exported and can be accessed simultaneously.
- readable
Mirror-style replication with a primary (writable) copy and one or more
secondary (read-only) copies which can become writable after a promotion.
- dr (for Disaster Recovery)
Generalized replication with secondary copies that are inaccessible until
they are promoted to become the active replica.
.. important::
The term active replica refers to the primary share. In writable style of
replication, all replicas are active, and there could be no distinction of
a primary share. In readable and dr styles of replication, a secondary
replica may be referred to as passive, non-active or simply replica.
Create share replica
====================
.. rest_method:: POST /v2/{tenant_id}/share-replicas
Create a share replica for the share.
Normal response codes: 202
Error response codes: badRequest(400), unauthorized(401), forbidden(403),
itemNotFound(404)
Request
-------
.. rest_parameters:: parameters.yaml
- tenant_id: tenant_id_path
- share_id: share_replica_share_id
- availability_zone: share_replica_az
- share_network_id: share_replica_share_network_id
Request example
---------------
.. literalinclude:: samples/share-replica-create-request.json
:language: javascript
Response parameters
-------------------
.. rest_parameters:: parameters.yaml
- share_id: share_replica_share_id
- status: share_replica_status
- cast_rules_to_readonly: share_replica_cast_rules_to_readonly
- updated_at: share_replica_updated_at
- share_network_id: share_network_id
- share_server_id: share_server_id
- host: share_replica_host
- id: share_replica_id
- replica_state: share_replica_replica_state
- created_at: share_replica_created_at
Response example
----------------
.. literalinclude:: samples/share-replica-create-response.json
:language: javascript
Promote share replica
=====================
.. rest_method:: POST /v2/{tenant_id}/share-replicas/{share_replica_id}/action
Promotes a replica to ``active`` replica state.
Normal response codes: 202
Error response codes: badRequest(400), unauthorized(401), forbidden(403),
itemNotFound(404)
Request
-------
.. rest_parameters:: parameters.yaml
- tenant_id: tenant_id_path
- share_replica_id: share_replica_id_path
Resync share replica
====================
.. rest_method:: POST /v2/{tenant_id}/share-replicas/{share_replica_id}/action
Resync a replica with its ``active`` mirror.
Normal response codes: 202
Error response codes: badRequest(400), unauthorized(401), forbidden(403),
itemNotFound(404)
Request
-------
.. rest_parameters:: parameters.yaml
- tenant_id: tenant_id_path
- share_replica_id: share_replica_id_path
List share replicas
===================
.. rest_method:: GET /v2/{tenant_id}/share-replicas?share_id={share_id}
Lists share replicas.
Normal response codes: 200
Error response codes: badRequest(400), unauthorized(401), forbidden(403),
itemNotFound(404)
Request
-------
.. rest_parameters:: parameters.yaml
- share_id: share_id
- tenant_id: tenant_id_path
Response parameters
-------------------
.. rest_parameters:: parameters.yaml
- share_id: share_replica_share_id
- status: share_replica_status
- id: share_replica_id
- replica_state: share_replica_replica_state
Response example
----------------
.. literalinclude:: samples/share-replicas-list-response.json
:language: javascript
List share replicas with details
================================
.. rest_method:: GET /v2/{tenant_id}/share-replicas/detail?share_id={share_id}
Lists share replicas with details.
Normal response codes: 200
Error response codes: badRequest(400), unauthorized(401), forbidden(403),
itemNotFound(404)
Request
-------
.. rest_parameters:: parameters.yaml
- share_id: share_id
- tenant_id: tenant_id_path
Response parameters
-------------------
.. rest_parameters:: parameters.yaml
- share_id: share_replica_share_id
- status: share_replica_status
- cast_rules_to_readonly: share_replica_cast_rules_to_readonly
- updated_at: share_replica_updated_at
- share_network_id: share_network_id
- share_server_id: share_server_id
- host: share_replica_host
- id: share_replica_id
- replica_state: share_replica_replica_state
- created_at: share_replica_created_at
Response example
----------------
.. literalinclude:: samples/share-replicas-list-detail-response.json
:language: javascript
Show share replica
==================
.. rest_method:: GET /v2/{tenant_id}/share-replicas/{share_replica_id}
Show a share replica.
Normal response codes: 200
Error response codes: badRequest(400), unauthorized(401), forbidden(403),
itemNotFound(404)
Request
-------
.. rest_parameters:: parameters.yaml
- share_replica_id: share_replica_id_path
- tenant_id: tenant_id_path
Response parameters
-------------------
.. rest_parameters:: parameters.yaml
- share_id: share_replica_share_id
- status: share_replica_status
- cast_rules_to_readonly: share_replica_cast_rules_to_readonly
- updated_at: share_replica_updated_at
- share_network_id: share_network_id
- share_server_id: share_server_id
- host: share_replica_host
- id: share_replica_id
- replica_state: share_replica_replica_state
- created_at: share_replica_created_at
Response example
----------------
.. literalinclude:: samples/share-replicas-show-response.json
:language: javascript
Reset status of the share replica
=================================
.. rest_method:: POST /v2/{tenant_id}/share-replicas/{share_replica_id}/action
Administrator only. Explicitly updates the ``status`` of a share replica.
Use the ``policy.json`` file to grant permissions for this action
to other roles.
Normal response codes: 202
Error response codes: badRequest(400), unauthorized(401), forbidden(403),
itemNotFound(404)
Request
-------
.. rest_parameters:: parameters.yaml
- reset_status: reset_status
- status: share_replica_status
- share_replica_id: share_replica_id_path
- tenant_id: tenant_id_path
Request example
---------------
.. literalinclude:: samples/share-replicas-reset-state-request.json
:language: javascript
Reset replica_state of the share replica
========================================
.. rest_method:: POST /v2/{tenant_id}/share-replicas/{share_replica_id}/action
Administrator only. Explicitly updates the ``replica state`` of a share replica.
Use the ``policy.json`` file to grant permissions for this action
to other roles.
Normal response codes: 202
Error response codes: badRequest(400), unauthorized(401), forbidden(403),
itemNotFound(404)
Request
-------
.. rest_parameters:: parameters.yaml
- reset_replica_state: share_replica_reset_replica_state
- replica_state: share_replica_replica_state
- share_replica_id: share_replica_id_path
- tenant_id: tenant_id_path
Request example
---------------
.. literalinclude:: samples/share-replicas-reset-replica-state-request.json
:language: javascript
Delete share replica
====================
.. rest_method:: DELETE /v2/{tenant_id}/share-replicas/{share_replica_id}
Deletes a share replica.
Normal response codes: 202
Error response codes: badRequest(400), unauthorized(401), forbidden(403),
itemNotFound(404), conflict(409)
.. note::
The ``active`` replica cannot be deleted with this API.
Request
-------
.. rest_parameters:: parameters.yaml
- share_replica_id: share_replica_id_path
- tenant_id: tenant_id_path
Force-delete share replica
==========================
.. rest_method:: POST /v2/{tenant_id}/share-replicas/{share_replica_id}/action
Administrator only. Force-deletes a share replica in any state.
Use the ``policy.json`` file to grant permissions for this action
to other roles.
Normal response codes: 202
Error response codes: badRequest(400), unauthorized(401), forbidden(403),
itemNotFound(404)
.. note::
The ``active`` replica cannot be deleted with this API.
Request
-------
.. rest_parameters:: parameters.yaml
- force_delete: share_replica_force_delete
- share_replica_id: share_replica_id_path
- tenant_id: tenant_id_path
Request example
---------------
.. literalinclude:: samples/share-replicas-force-delete-request.json
:language: javascript