72ebea66b6
This is a first pass in getting information out of the wiki and into the dev docs, so changes can be reviewed properly as discussed at the Havana summit. Change-Id: I75e71b3e5df69e6b507ee64d330a9ec2455266c5
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1.9 KiB
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68 lines
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Copyright (c) 2013 OpenStack, LLC.
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All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License"); you may
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not use this file except in compliance with the License. You may obtain
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a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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License for the specific language governing permissions and limitations
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under the License.
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Drivers
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=======
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Cinder exposes an API to users to interact with different storage backend
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solutions. The following are standards across all drivers for Cinder services
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to properly interact with a driver.
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Minimum Features
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----------------
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Minimum features are enforced to avoid having a grid of what features are
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supported by which drivers and which releases. Cinder Core requires that all
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drivers implement the following minimum features.
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Havana
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------
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* Volume Create/Delete
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* Volume Attach/Detach
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* Snapshot Create/Delete
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* Create Volume from Snapshot
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* Get Volume Stats
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* Copy Image to Volume
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* Copy Volume to Image
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* Clone Volume
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Icehouse
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--------
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* All of the above plus
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* Extend Volume
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Volume Stats
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------------
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Volume stats are used by the different schedulers for the drivers to provide
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a report on their current state of the backend. The following should be
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provided by a driver.
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* driver_version
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* free_capacity_gb
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* reserved_percentage
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* storage_protocol
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* total_capacity_gb
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* vendor_name
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* volume_backend_name
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**NOTE:** If the driver is unable to provide a value for free_capacity_gb or
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total_capacity_gb, keywords can be provided instead. Please use 'unknown' if
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the array cannot report the value or 'infinite' if the array has no upper
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limit.
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