Part 4 · Lesson 19 · Expert

CI/CD Pipelines

Push code; watch machines build, test, and ship it safely.

In this interactive Infrastructure lesson from Stencel Academy you don't just read — you type real commands like git push origin main, git push origin bugfix/timeout and watch the machine respond on a live, animated map. It is part of the free How Infrastructure Works course.

Key takeaway: Humans review the change; the pipeline builds, tests, and ships it — and a red test stops production cold.

Before this lesson

Builds on: Cloud & Infrastructure as Code.

What you'll practise

gh run list --limit 3 — The pipeline's own history.
gh run view 483 --log-failed — Read exactly why the gate closed.
git revert e3d7b90 — The safest rollback is another commit through the same pipeline.
docker images promptd — Every green build left an artifact you can redeploy.

Terms you'll learn

CI/CDpipelineartifactrolling deploydrainwebhook

Check your understanding

The deploy reached production with zero downtime. How?

Servers updated one at a time while the LB shifted traffic
All servers were replaced at the same instant
Users saw a maintenance page during the swap

Open the interactive lesson →