Creating a Slave with initial backup-fetch upon container initialisation

[intellix]

I'm looking to migrate servers and was reading this in regards to fetching WAL data: https://gist.github.com/ruckus/2293434

What are your thoughts about passing in a master/slave environment variable which when bringing up containers?

Combined with docker-compose and swarm, the first node would be set to master and additional nodes would come up as slaves and automatically fetch-backup.

[lukesmith]

Sounds like a good idea to me. Are you able to submit a PR?

[intellix]

Aye, I've almost got it working at home until my internet blacked out.
Had initial issues with a broken wal-e, had to do something like: RUN pip install --upgrade wal-e requests six.

[intellix]

PR as #3