Docker

The deploy that hung for an hour

Two bugs in Railyard's Go agent about the end of a process's life: a build timeout that killed one process out of a tree, and a stale Puma pidfile that survived every restart.

Four ways to build someone else's repo

The options a deploy platform has for turning a repository it didn't write into a running container, what each costs, and two bugs in Nixpacks and the buildpack launcher I hit deploying Discourse.

What a platform does between git push and a working URL

The five jobs every PaaS does after you push: build an image, run a release step, start your processes, route traffic to them, and roll back when it goes wrong. Explained from first principles, with Railyard's two-week-old pipeline as the running example.