[taskflow] Create volume revert fails when request is initiated by a member user

[Rohit Karajgi]

Commit: 1874d913ecbf8f09809992c98496365327905211

If a non-admin (member) user initiates a Create volume request, and an error occurs in a task
after the EntryCreateTask is complete, the revert operation, or volume destroy db call fails as it uses the non-admin context
to do so.

The following stacktrace is seen in c-api.log:
2013-09-25 00:39:44.522 15017 ERROR cinder.volume.flows.create_volume [req-68daa6e9-e75e-42c6-8e67-91efe8605bb5 6b91f0e38a8144a183c653e8eddd58e7 74bb572081ec4dd7a5d3fb641c6c92c6] Failed destroying volume entry 3faea4c8-fc05-4b2d-a3b2-a0b
88d3c621d
2013-09-25 00:39:44.522 15017 TRACE cinder.volume.flows.create_volume Traceback (most recent call last):
2013-09-25 00:39:44.522 15017 TRACE cinder.volume.flows.create_volume File "/opt/stack/cinder/cinder/volume/flows/create_volume/__init__.py", line 580, in revert
2013-09-25 00:39:44.522 15017 TRACE cinder.volume.flows.create_volume self.db.volume_destroy(context, vol_id)
2013-09-25 00:39:44.522 15017 TRACE cinder.volume.flows.create_volume File "/opt/stack/cinder/cinder/db/api.py", line 203, in volume_destroy
2013-09-25 00:39:44.522 15017 TRACE cinder.volume.flows.create_volume return IMPL.volume_destroy(context, volume_id)
2013-09-25 00:39:44.522 15017 TRACE cinder.volume.flows.create_volume File "/opt/stack/cinder/cinder/db/sqlalchemy/api.py", line 119, in wrapper
2013-09-25 00:39:44.522 15017 TRACE cinder.volume.flows.create_volume raise exception.AdminRequired()
2013-09-25 00:39:44.522 15017 TRACE cinder.volume.flows.create_volume AdminRequired: User does not have admin privileges
2013-09-25 00:39:44.522 15017 TRACE cinder.volume.flows.create_volume

The volume gets stuck in "Creating" state and is unusable.

Commands snip:
$ cinder create 1
ERROR: The server has either erred or is incapable of performing the requested operation.
$ cinder list
+--------------------------------------+----------+--------------+------+-------------+----------+-------------+
| ID | Status | Display Name | Size | Volume Type | Bootable | Attached to |
+--------------------------------------+----------+--------------+------+-------------+----------+-------------+
| 3faea4c8-fc05-4b2d-a3b2-a0b88d3c621d | creating | None | 1 | None | False | |
+--------------------------------------+----------+--------------+------+-------------+----------+-------------+

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/48891

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/48891
Committed: http://github.com/openstack/cinder/commit/62e6c7268dcdf2479a7c8864acc32493df22b7e8
Submitter: Jenkins
Branch: master

commit 62e6c7268dcdf2479a7c8864acc32493df22b7e8
Author: Abhijeet Malawade <email address hidden>
Date: Fri Sep 27 05:38:59 2013 -0700

    Create volume revert fails for non admin user

    Done fixes in revert method of EntryCreateTask task
    to use elevated context while destroying volume.

    Fixes bug #1230159

    Change-Id: I41b7f2ae4e0235df40bcdaa511256775228751aa