missing volume extend

[Tim Bell]

The cinder extend command allows a user to make a volume larger. There does not seem to be an equivalent command in OSC (and it is missing from the list in https://wiki.openstack.org/wiki/OpenStackClient/Commands)

Could this be implemented to fill in a functional gap ?

Thanks

[Steve Martinelli (stevemar)]

I agree that this is a bug, just wondering how we want to approach this...

Based on the CLI docs, the functionality of the 'extend' command is pretty limited:

  cinder extend

  usage: cinder extend <volume> <new-size>

I'm wondering if we want to bundle this into the 'osc volume set' command?
http://docs.openstack.org/developer/python-openstackclient/command-objects/volume.html#volume-set

rather than creating a new one-off verb 'extend', and it seems to logically fit into the concept of changing a volume's property.

[Steve Martinelli (stevemar)]

patch in tow: https://review.openstack.org/#/c/149859/

[Tim Bell (tim-bell)]

I like including it into volume set. In the end, the size is a characteristic. It also allows us to cover the potential decrease function in future. So, just specifying a new size in the set command would suit me fine (with appropriate error checking to warn where shrinking).

[Steve Martinelli (stevemar)]

Alright, we can add some basic checking before firing off the extend request, it'll look like:

(osc)$ openstack volume create myvol1 --size 1
(osc)$ openstack volume set myvol1 --size 2
(osc)$ openstack volume list
+--------------------------------------+--------------+-----------+------+-------------+
| ID | Display Name | Status | Size | Attached to |
+--------------------------------------+--------------+-----------+------+-------------+
| d684695f-3911-4d64-b64e-d0f073ceb75f | myvol1 | available | 2 | |
+--------------------------------------+--------------+-----------+------+-------------+
(osc)$ openstack volume set myvol1 --size 1
ERROR: openstackclient.shell Cannot shrink a volume
(osc)$ openstack volume list
+--------------------------------------+--------------+-----------+------+-------------+
| ID | Display Name | Status | Size | Attached to |
+--------------------------------------+--------------+-----------+------+-------------+
| d684695f-3911-4d64-b64e-d0f073ceb75f | myvol1 | available | 2 | |
+--------------------------------------+--------------+-----------+------+-------------+
(osc)$ openstack volume set myvol1 --size 3
(osc)$ openstack volume list
+--------------------------------------+--------------+-----------+------+-------------+
| ID | Display Name | Status | Size | Attached to |
+--------------------------------------+--------------+-----------+------+-------------+
| d684695f-3911-4d64-b64e-d0f073ceb75f | myvol1 | available | 3 | |
+--------------------------------------+--------------+-----------+------+-------------+

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/149859
Committed: https://git.openstack.org/cgit/openstack/python-openstackclient/commit/?id=4ff020006ebc96348822f50c5b484ee45e5f1b41
Submitter: Jenkins
Branch: master

commit 4ff020006ebc96348822f50c5b484ee45e5f1b41
Author: Steve Martinelli <email address hidden>
Date: Sun Jan 25 00:13:26 2015 -0500

    Add the ability to extend volumes in `osc volume set`

    Create a --size option for volume set, so the user may extend
    a volume's size.

    Change-Id: Ic8d3396d788a14ea1e10bf1da73edfd7f5d85070
    Closes-Bug: #1413954