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