Here’s what I wanted to do:

• Run the official redis image as a service in a cluster set up with Docker Swarm.
• Configure a password to be used by connecting clients. See also Redis’s AUTH command. The relevant command-line option when starting the redis server would be --requirepass.

This is just a quick post, sharing what I’ve figured out while trying to accomplish all of this. I hope it’s useful in case you’re looking for a way to make a container image (an official one or your own) ready to be used with Docker Secrets.