cinder-specs/specs/juno/huawei-dsware-driver.rst

Cinder volume driver for Huawei Dsware

Include the URL of your launchpad blueprint:

https://blueprints.launchpad.net/cinder/+spec/huawei-dsware-driver

This proposal is to add Huawei Dsware driver to cinder.

Huawei Dsware is a virtual SAN product, virtualizes homogeneous local disk device from mutiple hosts to provide virtual block device, while providing advanced features such as snapshot, clone,thin provision, cache and so on.

Problem description

Currently, user can't access Huawei Dsware by Openstack Cinder.

Proposed change

We will add a new Cinder driver that uses socket API to interact with Huawei Dsware storage. Dsware data panel using private Key-Value protocal, so we also add a new connector to realize attach/detach volume.

The following diagram shows the command and data paths.

+------------------+
|                  |
|  Cinder +        |
|  Cinder Volume   |
|                  |
|                  |
+------------------+
|                  |
|                  |
|                  |
|                  |
+---------------+-------+     +----+------------------+
|                       |     |                       |
|                       |     |                       |
|        Dsware         |     |     Dsware Driver     |
|       connector       |     |                       |
|                       |     |                       |
+-----------------------+     +-----------------------+
   |           |
   |           |
   |           |
  CLI     Socket API
   |           |
   |           |
   |           |
+--+-----------+---+
|                  |
|                  |
|     Dsware       |
|     storage      |
|                  |
+------------------+

Add new driver in /cinder/volume/drivers path, and realize cinder driver minimum features: * Volume Create/Delete * Volume Attach/Detach * Snapshot Create/Delete * Create Volume from Snapshot * Get Volume Stats * Copy Image to Volume * Copy Volume to Image * Clone Volume * Extend Volume

Add a new connector which can be shared with Huawei SDShypervisor in cinder/brick/initiator path, and realize abstract connector methods: * connect_volume * disconnect_volume

Alternatives

None

Data model impact

None

REST API impact

None

Security impact

None

Notifications impact

None

Other end user impact

User will be able to use Huawei Dsware with Cinder.

Performance Impact

None

Other deployer impact

None

Developer impact

None

Implementation

Assignee(s)

Primary assignee:

zhangni <zhangni@huawei.com>

Other contributors:

None

Work Items

Realize Cinder driver minimum features using socket API. Realize new connector using CLI. Add CI unit test plugins for Huawei Dsware cinder driver and connector.

Dependencies

Because Dsware data panel using private Key-Value protocal, we will create a new libvirt volume driver in Nova to realize attach/detach volume to instance.

Testing

Continuous integration will be done for Huawei Dsware Driver.

Documentation Impact

The CinderSupportMatrix table should be updated to add Huawei Dsware. https://wiki.openstack.org/wiki/CinderSupportMatrix

References

None