5a1d159d14
If we're swapping from a multiattach volume that has more than one read/write attachment, another server on the secondary attachment could be writing to the volume which is not getting copied into the volume to which we're swapping, so we could have data loss during the swap. This change does volume read/write attachment counting for the volume we're swapping from and if there is more than one read/write attachment on the volume, the swap volume operation fails with a 400 BadRequest error. Depends-On: https://review.openstack.org/573025/ Closes-Bug: #1775418 Change-Id: Icd7fcb87a09c35a13e4e14235feb30a289d22778
233 lines
6.7 KiB
ReStructuredText
233 lines
6.7 KiB
ReStructuredText
.. -*- rst -*-
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===================================================================
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Servers with volume attachments (servers, os-volume\_attachments)
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===================================================================
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Attaches volumes that are created through the volume API to server
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instances. Also, lists volume attachments for a server, shows
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details for a volume attachment, and detaches a volume.
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List volume attachments for an instance
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=======================================
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.. rest_method:: GET /servers/{server_id}/os-volume_attachments
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List volume attachments for an instance.
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Normal response codes: 200
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Error response codes: unauthorized(401), forbidden(403), itemNotFound(404)
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Request
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-------
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.. rest_parameters:: parameters.yaml
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- server_id: server_id_path
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- limit: limit_simple
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- offset: offset_simple
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Response
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--------
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.. rest_parameters:: parameters.yaml
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- volumeAttachments: volumeAttachments
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- device: device_resp
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- id: attachment_id_required
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- serverId: server_id
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- volumeId: volumeId_resp
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- tag: device_tag_bdm_attachment_resp
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**Example List volume attachments for an instance: JSON response**
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.. literalinclude:: ../../doc/api_samples/os-volumes/list-volume-attachments-resp.json
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:language: javascript
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**Example List tagged volume attachments for an instance (v2.70): JSON response**
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.. literalinclude:: ../../doc/api_samples/os-volumes/v2.70/list-volume-attachments-resp.json
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:language: javascript
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Attach a volume to an instance
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==============================
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.. rest_method:: POST /servers/{server_id}/os-volume_attachments
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Attach a volume to an instance.
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Normal response codes: 200
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Error response codes: badRequest(400), unauthorized(401), forbidden(403), itemNotFound(404), conflict(409)
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.. note:: From v2.20 attach a volume to an instance in SHELVED or SHELVED_OFFLOADED
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state is allowed.
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.. note:: From v2.60, attaching a multiattach volume to multiple instances is
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supported for instances that are not SHELVED_OFFLOADED. The ability
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to actually support a multiattach volume depends on the volume type
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and compute hosting the instance.
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Request
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-------
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.. rest_parameters:: parameters.yaml
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- server_id: server_id_path
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- volumeAttachment: volumeAttachment_post
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- volumeId: volumeId
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- device: device
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- tag: device_tag_bdm_attachment
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**Example Attach a volume to an instance: JSON request**
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.. literalinclude:: ../../doc/api_samples/os-volumes/attach-volume-to-server-req.json
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:language: javascript
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**Example Attach a volume to an instance and tag it (v2.49): JSON request**
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.. literalinclude:: ../../doc/api_samples/os-volumes/v2.49/attach-volume-to-server-req.json
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:language: javascript
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Response
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--------
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.. rest_parameters:: parameters.yaml
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- volumeAttachment: volumeAttachment
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- device: device_resp
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- id: attachment_id_required
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- serverId: server_id
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- volumeId: volumeId_resp
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- tag: device_tag_bdm_attachment_resp
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**Example Attach a volume to an instance: JSON response**
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.. literalinclude:: ../../doc/api_samples/os-volumes/attach-volume-to-server-resp.json
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:language: javascript
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**Example Attach a tagged volume to an instance (v2.70): JSON response**
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.. literalinclude:: ../../doc/api_samples/os-volumes/v2.70/attach-volume-to-server-resp.json
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:language: javascript
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Show a detail of a volume attachment
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====================================
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.. rest_method:: GET /servers/{server_id}/os-volume_attachments/{volume_id}
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Show a detail of a volume attachment.
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Normal response codes: 200
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Error response codes: unauthorized(401), forbidden(403), itemNotFound(404)
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Request
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-------
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.. rest_parameters:: parameters.yaml
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- server_id: server_id_path
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- volume_id: volume_id_attached_path
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Response
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--------
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.. rest_parameters:: parameters.yaml
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- volumeAttachment: volumeAttachment
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- device: device_resp
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- id: attachment_id_required
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- serverId: server_id
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- volumeId: volumeId_resp
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- tag: device_tag_bdm_attachment_resp
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**Example Show a detail of a volume attachment: JSON response**
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.. literalinclude:: ../../doc/api_samples/os-volumes/volume-attachment-detail-resp.json
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:language: javascript
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**Example Show a detail of a tagged volume attachment (v2.70): JSON response**
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.. literalinclude:: ../../doc/api_samples/os-volumes/v2.70/volume-attachment-detail-resp.json
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:language: javascript
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Update a volume attachment
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==========================
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.. rest_method:: PUT /servers/{server_id}/os-volume_attachments/{volume_id}
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Update a volume attachment.
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.. note:: This action only valid when the server is in ACTIVE, PAUSED and RESIZED state,
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or a conflict(409) error will be returned.
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.. warning:: This API is typically meant to only be used as part of a larger
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orchestrated volume migration operation initiated in the block
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storage service via the ``os-retype`` or ``os-migrate_volume``
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volume actions. Direct usage of this API is not recommended and
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may result in needing to hard reboot the server to update details
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within the guest such as block storage serial IDs. Furthermore,
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this API is only implemented by `certain compute drivers`_.
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.. _certain compute drivers: https://docs.openstack.org/nova/latest/user/support-matrix.html#operation_swap_volume
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Policy defaults enable only users with the administrative role to perform
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this operation. Cloud providers can change these permissions through the
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``policy.json`` file.
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Updating, or what is commonly referred to as "swapping", volume attachments
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with volumes that have more than one read/write attachment, is not supported.
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Normal response codes: 202
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Error response codes: badRequest(400), unauthorized(401), forbidden(403), itemNotFound(404), conflict(409)
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Request
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-------
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.. rest_parameters:: parameters.yaml
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- server_id: server_id_path
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- volume_id: volume_id_swap_src
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- volumeAttachment: volumeAttachment_put
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- volumeId: volumeId_swap
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**Example Update a volume attachment: JSON request**
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.. literalinclude:: ../../doc/api_samples/os-volumes/update-volume-req.json
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:language: javascript
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Response
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--------
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No body is returned on successful request.
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Detach a volume from an instance
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================================
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.. rest_method:: DELETE /servers/{server_id}/os-volume_attachments/{volume_id}
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Detach a volume from an instance.
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Normal response codes: 202
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Error response codes: badRequest(400), unauthorized(401), forbidden(403), itemNotFound(404), conflict(409)
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.. note:: From v2.20 detach a volume from an instance in SHELVED or SHELVED_OFFLOADED
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state is allowed.
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Request
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-------
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.. rest_parameters:: parameters.yaml
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- server_id: server_id_path
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- volume_id: volume_id_to_detach_path
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Response
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--------
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No body is returned on successful request.
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