Thursday, 16th January 2020
Demos, Prototypes, and MVPs (via) I really like how Jacob describes the difference between a demo and a prototype: a demo is externally facing and helps explain a concept to a customer; a prototype is internally facing and helps prove that something can be built.
How to do Zero Downtime Deployments of Docker Containers. I’m determined to get reliable zero-downtime deploys working for a new project, because I know from experience that even a few seconds of downtime during a deploy changes the project mentality from “deploy any time you want” to “don’t deploy too often”. I’m using Docker containers behind Traefik, which means new containers should have traffic automatically balanced to them by Traefik based on their labels. After much fiddling around the pattern described by this article worked best for me: it lets me start a new container, then stop the old one and have Traefik’s “retry” mechanism send any requests to the stopped container over to the new one instead.