central store of the facts

[martbhell]

Another way would be to have a central store of the facts that the nodes can query when they run ansible-pull. This would remove some of the hacks we have, like discussed in
#182

I haven't looked into this or tested it but seems cleaner and could perhaps also provide some performance boost:

http://docs.ansible.com/ansible/playbooks_variables.html#fact-caching

Using NFS (facts in json files in a directory) would be convenient but we need the variables available before we run ansible (when NFS is not available) so we'd need to run another service (like redis) on the install node with a persistent store of the facts. There are also some notes in the docs about

• redis client in EPEL being too old (also true for EL7?)
• beta-status
• can't use password while connecting to redis

After this is implemented we could probably give removing pull_variables.yml another shot ( #182 )