KVS cache backend incompatible with redis-py

[Alexander Makarov]

Created Redis cache backend: https://review.openstack.org/#/c/150844/

Tempest revealed problem with locking:

<11>Feb 3 14:56:14 node-27 keystone-all 'LuaLock' object has no attribute 'lock_timeout'
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi Traceback (most recent call last):
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi File "/usr/lib/python2.7/dist-packages/keystone/common/wsgi.py", line 223, in _call_
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi result = method(context, **params)
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi File "/usr/lib/python2.7/dist-packages/keystone/token/controllers.py", line 452, in delete_token
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi self.token_provider_api.revoke_token(token_id)
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi File "/usr/lib/python2.7/dist-packages/keystone/token/provider.py", line 485, in revoke_token
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi self._persistence.delete_token(token_id=token_id)
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi File "/usr/lib/python2.7/dist-packages/keystone/token/persistence/core.py", line 106, in delete_token
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi self.driver.delete_token(unique_id)
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi File "/usr/lib/python2.7/dist-packages/keystone/token/persistence/backends/kvs.py", line 254, in delete_token
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi self._add_to_revocation_list(data, lock)
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi File "/usr/lib/python2.7/dist-packages/keystone/common/kvs/core.py", line 405, in _exit_
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi self.release()
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi File "/usr/lib/python2.7/dist-packages/keystone/common/kvs/core.py", line 398, in release
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi if not self.expired:
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi File "/usr/lib/python2.7/dist-packages/keystone/common/kvs/core.py", line 389, in expired
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi if self.mutex.lock_timeout == 0:
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi AttributeError: 'LuaLock' object has no attribute 'lock_timeout'
2015-02-03 14:56:14.890 8959 TRACE keystone.common.wsgi

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/153307

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/153307
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=2a8b646e7365584dcf7ba0a9a97b6d8ce495a19a
Submitter: Jenkins
Branch: master

commit 2a8b646e7365584dcf7ba0a9a97b6d8ce495a19a
Author: Alexander Makarov <email address hidden>
Date: Thu Feb 5 20:28:57 2015 +0300

    Fix for KVS cache backend incompatible with redis-py

    lock_timeout has different identifiers across different backends.
    This patch makes KeyValueStoreLock to use internal lock_timeout
    instead of relying on naming in backend implementations.

    Change-Id: Ie0f8780cc85f02cfa768b46b8942c1e5a7685fb9
    Closes-Bug: 1417737