Document memcached host system time configuration.

* Addresses 1022614

Change-Id: I81617c4eecd6fdfdb3f01eb674f7308d9c93baaa
This commit is contained in:
Maru Newby 2012-09-07 13:57:04 -07:00
parent ee31114d9d
commit 1683d847f0
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@ -45,6 +45,18 @@ Stop the process using ``Control-C``.
If you have not already configured Keystone, it may not start as expected.
Memcached and System Time
=========================
If using `memcached`_ with Keystone - e.g. using the memcache token
driver or the ``auth_token`` middleware - ensure that the system time
of memcached hosts is set to UTC. Memcached uses the host's system
time in determining whether a key has expired, whereas Keystone sets
key expiry in UTC. The timezone used by Keystone and memcached must
match if key expiry is to behave as expected.
.. _`memcached`: http://memcached.org/
Configuration Files
===================