Consider mounting Unix sockets for memcached and postgres

[jpmckinney]

Unix sockets can easily be mounted as volumes e.g. /var/run/app.sock:/var/run/app.sock

Advantage: Arguably more secure (though external firewall is sufficient)

Disadvantage: Need to figure out correct permissions on the socket itself. Might end up being messier.

Not sure if worthwhile, but thought I'd open an issue to discuss.

[jpmckinney]

Restoring title - gunicorn's socket is for a control interface.

[jpmckinney]

Using socket for Redis on corporate website (manually configured via wp-config.php).