openstack/manila
Code Issues Proposed changes
3bd8fe3cfe
manila/api-ref/source/share-replicas.inc
kpdev b49605945a Add "share-network" option for replica create API. 
Share replica create API does not allow to specify share network and
forces to use parent share's share network. This is problem for some
use-cases, e.g. migration from one share network to another share
network via replication is not possible. Fixed by allowing to pass
'share-network' option for share replica create API and make sure both
parent share-network and user provided share-network will have same
security service association.

Partial-Bug: #1925486
Change-Id: I9049dcd418fbb16d663ab8ed27b90c765fafc5d3
2022-08-15 11:01:08 +00:00

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.. -*- rst -*-
Share replicas (since API v2.11)
================================
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/share-replicas
.. versionadded:: 2.11
Create a share replica for the share.
Response codes
--------------
.. rest_status_code:: success status.yaml
- 202
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
Request
-------
.. rest_parameters:: parameters.yaml
- project_id: project_id_path
- share_id: share_replica_share_id
- availability_zone: share_replica_az
- share_network_id: share_replica_share_network_id
- scheduler_hints: share_replica_scheduler_hints
Request example
---------------
.. literalinclude:: samples/share-replica-create-request.json
:language: javascript
.. note::
Since API version 2.72, the parameter ``share_network_id`` is added which
was earlier supported but later deprecated from version 2.51. In case, the
parameter is not specified, it will be inherited from its parent share,
and the Shared File Systems service will automatically choose which share
network subnet your share replica will be placed, according to the
specified availability zone.
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: 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: created_at
Response example
----------------
.. literalinclude:: samples/share-replica-create-response.json
:language: javascript
Promote share replica
~~~~~~~~~~~~~~~~~~~~~
.. rest_method:: POST /v2/share-replicas/{share_replica_id}/action
.. versionadded:: 2.11
Promotes a replica to ``active`` replica state.
Response codes
--------------
.. rest_status_code:: success status.yaml
- 202
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
Request
-------
.. rest_parameters:: parameters.yaml
- project_id: project_id_path
- share_replica_id: share_replica_id_path
Request example
---------------
.. literalinclude:: samples/share-replica-promote-request.json
:language: javascript
Resync share replica
~~~~~~~~~~~~~~~~~~~~
.. rest_method:: POST /v2/share-replicas/{share_replica_id}/action
.. versionadded:: 2.11
Resync a replica with its ``active`` mirror.
Response codes
--------------
.. rest_status_code:: success status.yaml
- 202
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
Request
-------
.. rest_parameters:: parameters.yaml
- project_id: project_id_path
- share_replica_id: share_replica_id_path
Request example
---------------
.. literalinclude:: samples/share-replica-resync-request.json
:language: javascript
List share replicas
~~~~~~~~~~~~~~~~~~~
.. rest_method:: GET /v2/share-replicas?share_id={share_id}
.. versionadded:: 2.11
Lists share replicas.
Response codes
--------------
.. rest_status_code:: success status.yaml
- 200
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
Request
-------
.. rest_parameters:: parameters.yaml
- project_id: project_id_path
- share_id: share_id
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/share-replicas/detail?share_id={share_id}
.. versionadded:: 2.11
Lists share replicas with details.
Response codes
--------------
.. rest_status_code:: success status.yaml
- 200
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
Request
-------
.. rest_parameters:: parameters.yaml
- project_id: project_id_path
- share_id: share_id_replicas_query
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: 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: created_at
Response example
----------------
.. literalinclude:: samples/share-replicas-list-detail-response.json
:language: javascript
Show share replica
~~~~~~~~~~~~~~~~~~
.. rest_method:: GET /v2/share-replicas/{share_replica_id}
.. versionadded:: 2.11
Show a share replica.
Response codes
--------------
.. rest_status_code:: success status.yaml
- 200
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
Request
-------
.. rest_parameters:: parameters.yaml
- project_id: project_id_path
- share_replica_id: share_replica_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: 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: created_at
Response example
----------------
.. literalinclude:: samples/share-replicas-show-response.json
:language: javascript
Reset status of the share replica
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. rest_method:: POST /v2/share-replicas/{share_replica_id}/action
.. versionadded:: 2.11
Administrator only. Explicitly updates the ``status`` of a share replica.
Use the ``policy.yaml`` file to grant permissions for this action
to other roles.
Response codes
--------------
.. rest_status_code:: success status.yaml
- 202
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
Request
-------
.. rest_parameters:: parameters.yaml
- project_id: project_id_path
- share_replica_id: share_replica_id_path
- reset_status: reset_status
- status: share_replica_status
Request example
---------------
.. literalinclude:: samples/share-replicas-reset-state-request.json
:language: javascript
Reset replica_state of the share replica
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.. rest_method:: POST /v2/share-replicas/{share_replica_id}/action
.. versionadded:: 2.11
Administrator only. Explicitly updates the ``replica state`` of a share replica.
Use the ``policy.yaml`` file to grant permissions for this action
to other roles.
Response codes
--------------
.. rest_status_code:: success status.yaml
- 202
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
Request
-------
.. rest_parameters:: parameters.yaml
- project_id: project_id_path
- share_replica_id: share_replica_id_path
- reset_replica_state: share_replica_reset_replica_state
- replica_state: share_replica_replica_state
Request example
---------------
.. literalinclude:: samples/share-replicas-reset-replica-state-request.json
:language: javascript
Delete share replica
~~~~~~~~~~~~~~~~~~~~
.. rest_method:: DELETE /v2/share-replicas/{share_replica_id}
.. versionadded:: 2.11
Deletes a share replica.
Response codes
--------------
.. rest_status_code:: success status.yaml
- 202
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
- 409
.. note::
The ``active`` replica cannot be deleted with this API.
Request
-------
.. rest_parameters:: parameters.yaml
- project_id: project_id_path
- share_replica_id: share_replica_id_path
Force-delete share replica
~~~~~~~~~~~~~~~~~~~~~~~~~~
.. rest_method:: POST /v2/share-replicas/{share_replica_id}/action
.. versionadded:: 2.11
Administrator only. Force-deletes a share replica in any state.
Use the ``policy.yaml`` file to grant permissions for this action
to other roles.
Response codes
--------------
.. rest_status_code:: success status.yaml
- 202
.. rest_status_code:: error status.yaml
- 400
- 401
- 403
- 404
.. note::
The ``active`` replica cannot be deleted with this API.
Request
-------
.. rest_parameters:: parameters.yaml
- project_id: project_id_path
- share_replica_id: share_replica_id_path
- force_delete: share_replica_force_delete
Request example
---------------
.. literalinclude:: samples/share-replicas-force-delete-request.json
:language: javascript
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