Hi Ajay,
Memcached does not provide any replication, you basically just set up
individual memcached servers and specify multiple servers on the client
side. So if you lose one of the memcached servers (or its restarted)
then you lose all the data that it holds, but at least the client has
other places to store data. If using UUID tokens then you are going to
want to use SQL backend in a HA environment. Alternatively have a look
at using fernet token provider instead, for fernet you only need to
worry about rotation and replication of keys rather than the replication
of actual tokens themselves.
Regards,
Ross
On 18/12/2015 6:26 PM, Ajay Kalambur (akalambu) wrote:
Hi
If we deploy Keystone using memcached as token backend we see that
bringing down 1 of 3 memcache servers results in some tokens getting
invalidated. Does memcached not support replication of tokens
So if we wanted HA w.r.t keystone tokens should we use SQL backend for
tokens?
Ajay
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