Consul

With multi-host networking ready for production and the announcement of Swarm 1.0, I think it’s time to give Docker a serious try. This post details the steps I took to orchestrate a multi-host and multi-container app.

Architecture

This is a simple Node app that uses Redis as database, load balanced by Nginx. Each blue box is a Docker host, which runs several containers. All hosts talk to Consul for service discovery. The cluster has 5 nodes, each serves a specific purpose. We want to easily scale up and down the number of app containers.