Module 5 · Reliability and the public internet Lesson 15 of 15

Uptime checks, alerts and incidents

Worked example

A cron job that fetches the health endpoint every five minutes and posts to a webhook when it fails turns a silent outage into a message you see.

Your practice task

Set up one uptime check against a health endpoint and a free alert channel, then take the app down to prove it fires.

Do this before moving on. Reading a solution teaches the shape of it; typing it teaches you.

Key takeaway

Monitoring is a check that runs on a timer and shouts when it fails. If nobody is told, there is no monitoring - and the first time you learn the site is down should not be from a customer.

Almost there

15 lessons left of 15

Finish every lesson to unlock the certificate. Each one ends in a practice task — do them and the final project brief writes itself.