It's midnight. You get an incident call on your phone that your application's web server has crashed, and users are seeing the dreaded 500 Internal server error. You stumble to your laptop, sleepy-eyes, to run the restart command or to run your restart script.
This is the "Old Way." It's manual, it's reactive, and it ruins your sleep.
In the world of DevOps, we don't just fix things; we build things that fix themselves (self-healing). In this article, we're going to build a simple automation that detects a web server crash and restarts the service before you even roll over in bed.
The "Healing" Architecture
To build this, we need five simple AWS resources:
