Hi Roman.
That's interesting, although’s hard to believe (there is no slave lag in galera
multi master). I can only suggest us to create another jepsen test to verify
exactly scenario you describe. As well as other OpenStack specific patterns.
Regards,
Bogdan.
Od: Roman Podoliaka
Thank you Andrew.
Answers below.
>>>
Sounds interesting, can you give any comment about how it differs to the
other[i] upstream agent?
Am I right that this one is effectively A/P and wont function without some kind
of shared storage?
Any particular reason you went down this path instead of full
> Why do you use [puppet] tag?
> Is there anything related to Puppet OpenStack modules we should take
> care of?
There are several deployment automation tools leveraging the puppet-openstack
modules.
Those are under the Big Tent and each has its own composition layer and
deployment patterns
I suggest to use pacemaker multistate clone resource to rotate and rsync fernet
tokens from local directories across cluster nodes. The resource prototype is
described here https://etherpad.openstack.org/p/fernet_tokens_pacemaker
Pros: Pacemaker will care about CAP/split-brain stuff for us, we
