API Overview

API Overview

This section describes some of the most commonly used Cinder API calls and their corresponding CLI commands. It is not meant to be a comprehensive list that is representative of all functionality present in Cinder; for more information, please refer to the OpenStack Configuration Reference.

Note

Block Storage V2 API has been deprecated. To ensure Cinder does not use the V2 API, update enable_v2_api=false and enable_v3_api=true in your cinder.conf file.

Volume API

Table 4.2, “Cinder API Overview - Volume” specifies the valid operations that can be performed on Cinder volumes. Please note that Cinder volumes are identified as CLI command arguments by either their names or UUID.

Operation

CLI Command

Description

Create

cinder create

Create a Cinder volume of specified size; optional name, availability zone, volume type

Delete

cinder delete

Delete an existing Cinder volume; the cinder force-delete command may be required if the Cinder volume is in an error state

Edit

cinder metadata

Set or unset metadata on a Cinder volume

Extend

cinder extend

Increase the capacity of a Cinder volume to the specified size

List

cinder list

List all Cinder volumes

Migrate

cinder migrate

Move a Cinder volume to a new Cinder host (specified by name). From Xena release, can be performed using the storage approach, becoming faster and non-disruptive within a same SVM. On NFS drivers is always disruptive.

Show

cinder show

Show details about a Cinder volume

Upload as image

cinder upload-to-image

Upload a Cinder volume to the OpenStack Image Service

Manage

cinder manage

Bring an existing storage object under Cinder management

Unmanage

cinder unmanage

Cease management of an existing Cinder volume without deleting the backing storage object

Revert to snapshot

cinder revert-to-snapshot

Restore a Cinder volume to the state and data of the most recent snapshot. This command is available in microversion 3.40. From Xena release, this command is performed using the storage with a safer and faster approach.

Table 4.2. Cinder API Overview - Volume

Snapshot API

Table 4.3, “Cinder API Overview - Snapshot” specifies the valid operations that can be performed on Cinder snapshots. Please note that Cinder snapshots are identified as CLI command arguments by either their display name or UUID.

Operation

CLI Command

Description

Create

cinder snapshot-create

Create a Cinder snapshot of a specific Cinder volume

Delete

cinder snapshot-delete

Delete a Cinder snapshot

Edit

cinder snapshot-metadata

Set or unset metadata on a Cinder snapshot

List

cinder snapshot-list

List all Cinder snapshots

Rename

cinder snapshot-rename

Change the display-name of a Cinder snapshot

Reset State

cinder snapshot-reset-state

Reset the state of a Cinder snapshot

Show

cinder snapshot-show

Show details about a Cinder snapshot

Table 4.3. Cinder API Overview - Snapshot

Consistency Group API

Table 4.4, “Cinder API Overview - Consistency Groups” specifies the valid operations that can be performed on Cinder consistency groups. Please note that Cinder consistency groups and cgsnapshots are identified as CLI command arguments by either their display name or UUID. Consistency group operations support has been deprecated in Block Storage V3 API. Only Block Storage V2 API supports consistency groups. Future releases will involve a migration of existing consistency group operations to use generic volume group operations.

Operation

CLI Command

Description

Create

cinder consisgroup-create

Create a consistency group with support for at least one volume type

Show

cinder consisgroup-show

Display details for a specified consistency group

List

cinder consisgroup-list

Show a list of all created consistency groups

Create a volume and add it to a consistency group

cinder create

Expand a consistency group to have another volume by creating a volume with the --consisgroup-id parameter

Create a cgsnapshot

cinder cgsnapshot-create

Generate a snapshot of a consistency group

Show a snapshot of a consistency group

cinder cgsnapshot-show

Display details for the cgsnapshot of consistency group

List consistency group snapshots

cinder cgsnapshot-list

Display all cgsnapshots for a consistency group

Delete a snapshot of a consistency group

cinder cgsnapshot-delete

Remove a cgsnapshot

Delete a consistency group

cinder consisgroup-delete

The --force flag is required when volumes are inside the consistency group

Modify a consistency group

cinder consisgroup-update

Add or remove volumes from a consistency group with --add-volumes [UUID-list] or --remove-volumes [UUID-list] parameters

Create a consistency group from the snapshot of another consistency group

cinder consisgroup-create-from-src

Use a cgsnapshot to generate a new consistency group

Create a consistency group from a source consistency group

cinder consisgroup-create-from-src

Copy a consistency group

Table 4.4. Cinder API Overview - Consistency Groups

Backup API

Table 4.5, “Cinder API Overview - Backup” specifies the valid operations that can be performed on Cinder backups. Please note that Cinder backups are identified as CLI command arguments by either their display name or UUID.

Operation

CLI Command

Description

Create

cinder backup-create

Create a Cinder backup

Delete

cinder backup-delete

Delete a Cinder backup

List

cinder backup-list

List all Cinder backups

Restore

cinder backup-restore

Restore a Cinder backup into a Cinder volume

Show

cinder backup-show

Show details about a Cinder backup

Table 4.5. Cinder API Overview - Backup

Group API

Table 4.6, “Cinder API Overview - Group” specifies the valid operations that can be performed on Cinder groups. Please note that Cinder groups are identified as CLI command arguments by either their display name or UUID.

Note

Currently only the Block Storage V3 API supports group operations. The minimum version for group operations supported by the ONTAP drivers is 3.14. The API version can be specified with the following CLI flag --os-volume-api-version 3.14

Note

The Cinder community plans to migrate existing consistency group operations to group operations in an upcoming release. Please review Cinder release notes for upgrade instructions prior to using group operations.

Note

The ONTAP volume drivers support the consistent_group_snapshot_enabled group type. By default Cinder group snapshots take individual snapshots of each Cinder volume in the group. To enable consistency group snapshots set consistent_group_snapshot_enabled="<is> True" in the group type used. Be aware that only one consistency group snapshot per storage pool (i.e. flexvol) can be performed at a time. Overlapping consistency group snapshot operations can fail.

Operation

CLI Command

Description

Create

cinder group-create

Creates a group.

Create a group from a source group

cinder group-create-from-src

Creates a group from a group snapshot or a source group.

Delete

cinder group-delete

Removes one or more groups.

List

cinder group-list

Lists all groups.

Show

cinder group-show

Shows details of a group.

Update

cinder group-update

Updates a group.

Create group snapshot

cinder group-snapshot-create

Creates a group snapshot.

Delete group snapshot

cinder group-snapshot-delete

Removes one or more group snapshots.

List group snapshot

cinder group-snapshot-list

Lists all group snapshots.

Show group snapshot

cinder group-snapshot-show

Shows group snapshot details.

Create group type

cinder group-type-create

Creates a group type.

Delete group type

cinder group-type-delete

Deletes group type or types.

List default group type

cinder group-type-default

List the default group type.

List group types

cinder group-type-list

Lists available ‘group types’. (Admin only will see private types)

Show group type

cinder group-type-show

Show group type details.

Update group type

cinder group-type-update

Updates group type name, description, and/or is_public.

List group specs

cinder group-specs-list

Lists current group types and specs.

Set group specs

cinder group-type-key

Set or unset group_spec for a group type.

Table 4.6. Cinder API Overview - Volume Group

Volume Type API

Table 4.7, “Cinder API Overview - Volume Type” specifies the valid operations that can be performed on Cinder volume types. Please note that Cinder volume types are identified as CLI command arguments by either their display name or UUID.

Operation

CLI Command

Description

Create

cinder type-create

Create a Cinder volume type

Delete

cinder type-delete

Delete a Cinder volume type

List

cinder type-list

List existing Cinder volume type

Table 4.7. Cinder API Overview - Volume Type

Volume Type Extra Specs API

Table 4.8, “Cinder API Overview - Volume Type Extra Specs” specifies the valid operations that can be performed on Cinder volume type extra specs. Please note that Cinder volume type extra specs are properties of Cinder volume types and are identified by their parent object.

Operation

CLI Command

Description

Set extra specs

cinder type-key vtype set

Assign extra specs to Cinder volume type

Unset extra specs

cinder type-key vtype unset

Remove extra specs from Cinder volume type

Table 4.8. Cinder API Overview - Volume Type Extra Specs

Volume Type QoS Specs API

Table 4.9, “Cinder API Overview - Volume Type QoS Specs” specifies the valid operations that can be performed on Cinder volume type QoS specs. Please note that Cinder volume type QoS specs are created independently of Cinder volume types and are subsequently associated with a Cinder volume type.

Operation

CLI Command

Description

Create QoS specs

cinder qos-create

Create a Cinder QoS Spec

Delete QoS specs

cinder qos-delete

Delete a Cinder QoS Spec

List QoS specs

cinder qos-list

List existing Cinder QoS Specs

Show

cinder qos-show

Show details about a Cinder QoS Spec

Associate QoS specs

cinder qos-associate

Associate a Cinder QoS Spec with a Cinder volume type

Disassociate QoS specs

cinder qos-disassociate

Disassociate a Cinder QoS Spec from a Cinder volume type

Edit QoS spec

cinder qos-key

Set or unset specifications for a Cinder QoS Spec

Table 4.9. Cinder API Overview - Volume Type QoS Specs