Infrastructure

Infrastructure is everything underneath the product that keeps it running: the servers, the deploy pipeline, the process manager that restarts a crashed app, the monitoring that pages you, and the rollback that saves you when a release goes wrong. Most of it is invisible when it works, which is the point. The aim is to make shipping boring, so a deploy is one command and a verified health check, and to make outages short, so when something breaks the path back is automatic and the blast radius is small. That means treating servers as something you can rebuild from a script, not hand-tune by hand, and wiring in the checks that catch a bad build before it reaches a user. These notes cover how we set up deploys, what we monitor, and the failure drills that make a 3am incident a five-minute fix.