OpenStack Compute (Nova)
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.. -*- rst -*-
===================================================================
Servers with volume attachments (servers, os-volume\_attachments)
===================================================================
Attaches volumes that are created through the volume API to server
instances. Also, lists volume attachments for a server, shows
details for a volume attachment, and detaches a volume.
List volume attachments for an instance
=======================================
.. rest_method:: GET /servers/{server_id}/os-volume_attachments
List volume attachments for an instance.
Normal response codes: 200
Error response codes: unauthorized(401), forbidden(403), itemNotFound(404)
Request
-------
.. rest_parameters:: parameters.yaml
- server_id: server_id_path
- limit: limit_simple
- offset: offset_simple
Response
--------
.. rest_parameters:: parameters.yaml
- volumeAttachments: volumeAttachments
- id: attachment_id_required
- serverId: server_id
- volumeId: volumeId_resp
- device: attachment_device_resp
- tag: device_tag_bdm_attachment_resp
- delete_on_termination: delete_on_termination_attachments_resp
**Example List volume attachments for an instance: JSON response**
.. literalinclude:: ../../doc/api_samples/os-volumes/list-volume-attachments-resp.json
:language: javascript
**Example List tagged volume attachments for an instance (v2.79): JSON response**
.. literalinclude:: ../../doc/api_samples/os-volumes/v2.79/list-volume-attachments-resp.json
:language: javascript
Attach a volume to an instance
==============================
.. rest_method:: POST /servers/{server_id}/os-volume_attachments
Attach a volume to an instance.
Normal response codes: 200
Error response codes: badRequest(400), unauthorized(401), forbidden(403), itemNotFound(404), conflict(409)
.. note:: From v2.20 attach a volume to an instance in SHELVED or SHELVED_OFFLOADED
state is allowed.
.. note:: From v2.60, attaching a multiattach volume to multiple instances is
supported for instances that are not SHELVED_OFFLOADED. The ability
to actually support a multiattach volume depends on the volume type
and compute hosting the instance.
.. note:: This is an asynchronous API, callers should poll the status and list
of attachments of the volume within the volume API to determine when
the attachment has completed successfully.
Request
-------
.. rest_parameters:: parameters.yaml
- server_id: server_id_path
- volumeAttachment: volumeAttachment_post
- volumeId: volumeId
- device: device
- tag: device_tag_bdm_attachment
- delete_on_termination: delete_on_termination_attachments_req
**Example Attach a volume to an instance: JSON request**
.. literalinclude:: ../../doc/api_samples/os-volumes/attach-volume-to-server-req.json
:language: javascript
**Example Attach a volume to an instance and tag it (v2.49): JSON request**
.. literalinclude:: ../../doc/api_samples/os-volumes/v2.49/attach-volume-to-server-req.json
:language: javascript
**Example Attach a volume to an instance with "delete_on_termination" (v2.79): JSON request**
.. literalinclude:: ../../doc/api_samples/os-volumes/v2.79/attach-volume-to-server-req.json
:language: javascript
Response
--------
.. rest_parameters:: parameters.yaml
- volumeAttachment: volumeAttachment
- device: device_resp
- id: attachment_id_required
- serverId: server_id
- volumeId: volumeId_resp
- tag: device_tag_bdm_attachment_resp
- delete_on_termination: delete_on_termination_attachments_resp
**Example Attach a volume to an instance: JSON response**
.. literalinclude:: ../../doc/api_samples/os-volumes/attach-volume-to-server-resp.json
:language: javascript
**Example Attach a tagged volume to an instance (v2.70): JSON response**
.. literalinclude:: ../../doc/api_samples/os-volumes/v2.70/attach-volume-to-server-resp.json
:language: javascript
**Example Attach a volume with "delete_on_termination" (v2.79): JSON response**
.. literalinclude:: ../../doc/api_samples/os-volumes/v2.79/attach-volume-to-server-resp.json
:language: javascript
Show a detail of a volume attachment
====================================
.. rest_method:: GET /servers/{server_id}/os-volume_attachments/{volume_id}
Show a detail of a volume attachment.
Normal response codes: 200
Error response codes: unauthorized(401), forbidden(403), itemNotFound(404)
Request
-------
.. rest_parameters:: parameters.yaml
- server_id: server_id_path
- volume_id: volume_id_attached_path
Response
--------
.. rest_parameters:: parameters.yaml
- volumeAttachment: volumeAttachment
- id: attachment_id_required
- serverId: server_id
- volumeId: volumeId_resp
- device: attachment_device_resp
- tag: device_tag_bdm_attachment_resp
- delete_on_termination: delete_on_termination_attachments_resp
**Example Show a detail of a volume attachment: JSON response**
.. literalinclude:: ../../doc/api_samples/os-volumes/volume-attachment-detail-resp.json
:language: javascript
**Example Show a detail of a tagged volume attachment (v2.79): JSON response**
.. literalinclude:: ../../doc/api_samples/os-volumes/v2.79/volume-attachment-detail-resp.json
:language: javascript
Update a volume attachment
==========================
.. rest_method:: PUT /servers/{server_id}/os-volume_attachments/{volume_id}
Update a volume attachment.
.. note:: This action only valid when the server is in ACTIVE, PAUSED and RESIZED state,
or a conflict(409) error will be returned.
.. warning:: When updating volumeId, this API is typically meant to
only be used as part of a larger orchestrated volume
migration operation initiated in the block storage
service via the ``os-retype`` or ``os-migrate_volume``
volume actions. Direct usage of this API to update
volumeId is not recommended and may result in needing to
hard reboot the server to update details within the guest
such as block storage serial IDs. Furthermore, updating
volumeId via this API is only implemented by `certain
compute drivers`_.
.. _certain compute drivers: https://docs.openstack.org/nova/latest/user/support-matrix.html#operation_swap_volume
Policy default role is 'rule:system_admin_or_owner', its scope is
[system, project], which allow project members or system admins to
change the fields of an attached volume of a server. Policy defaults
enable only users with the administrative role to change ``volumeId``
via this operation. Cloud providers can change these permissions
through the ``policy.json`` file.
Updating, or what is commonly referred to as "swapping", volume attachments
with volumes that have more than one read/write attachment, is not supported.
Normal response codes: 202
Error response codes: badRequest(400), unauthorized(401), forbidden(403), itemNotFound(404), conflict(409)
Request
-------
.. rest_parameters:: parameters.yaml
- server_id: server_id_path
- volume_id: volume_id_swap_src
- volumeAttachment: volumeAttachment_put
- volumeId: volumeId_swap
- delete_on_termination: delete_on_termination_put_req
- device: attachment_device_put_req
- serverId: attachment_server_id_put_req
- tag: device_tag_bdm_attachment_put_req
- id: attachment_id_put_req
.. note:: Other than ``volumeId``, as of v2.85 only
``delete_on_termination`` may be changed from the current
value.
**Example Update a volume attachment (v2.85): JSON request**
.. literalinclude:: ../../doc/api_samples/os-volumes/v2.85/update-volume-attachment-delete-flag-req.json
:language: javascript
Response
--------
No body is returned on successful request.
Detach a volume from an instance
================================
.. rest_method:: DELETE /servers/{server_id}/os-volume_attachments/{volume_id}
Detach a volume from an instance.
Normal response codes: 202
Error response codes: badRequest(400), unauthorized(401), forbidden(403), itemNotFound(404), conflict(409)
.. note:: From v2.20 detach a volume from an instance in SHELVED or SHELVED_OFFLOADED
state is allowed.
.. note:: This is an asynchronous API, callers should poll the list
of volume attachments provided by ``GET
/servers/{server_id}/os-volume_attachments`` to determine when the
detachment of the volume has completed successfully.
Request
-------
.. rest_parameters:: parameters.yaml
- server_id: server_id_path
- volume_id: volume_id_to_detach_path
Response
--------
No body is returned on successful request.