Learn DevOps

Ship software fast and safely: automate the road from commit to production, and run what you build.

Start learning 16 lessons · about 7.5 hours · free
About this track

DevOps is how modern teams go from a monthly, all-hands-on-deck release to deploying many times a day without drama. It’s a culture of shared ownership backed by automation: pipelines that build, test and ship every change, infrastructure written as code, and monitoring that tells you about problems before your customers do.

You’re joining Byte Bakery, an online bakery that delivers warm croissants by drone - and still deploys on a dreaded monthly Release Night. You’ll measure delivery with the DORA metrics and switch to trunk-based development and feature flags; build CI pipelines, artifacts and container images; ship with continuous delivery, safe deployment strategies and GitOps; manage servers with Terraform and Ansible; and keep production healthy with SLO-based alerting, calm incident response and DevSecOps. Along the way you’ll run pipelines, read Terraform plans and sort practices. Every exercise is a small Python tool of the kind DevOps engineers really write, and the capstone builds Byte Bakery’s delivery pipeline.

Before you start
  • Basic Python for the exercises: strings, lists, dicts, loops and functions.
  • Some familiarity with Git and the command line helps - the Git and Bash tracks cover them.
  • A rough idea of how web apps run on servers.
  1. Unit 1 · 0/3 lessons

    DevOps foundations

    The culture and principles of DevOps, measuring delivery with the DORA metrics, and trunk-based development with feature flags. Badge: Wall breaker

    1. 0x001What is DevOps?Tear down the wall between building software and running it: the culture, the CALMS model, the Three Ways and value streams. 24 min 0/2 exercises solved 24 min 0/2 exercises solved
    2. 0x102Measuring delivery: the DORA metricsMeasure speed and stability together with the four key metrics - deployment frequency, lead time, change failure rate and time to restore. 24 min 0/2 exercises solved 24 min 0/2 exercises solved
    3. 0x203Trunk-based development and feature flagsIntegrate continuously: keep branches short-lived, merge to main daily, and hide unfinished work behind feature flags. 26 min 0/2 exercises solved 26 min 0/2 exercises solved
  2. Unit 2 · 0/3 lessons

    Continuous integration

    Fast CI pipelines, flaky tests, versioned artifacts, caching and well-built container images. Badge: Pipeline plumber

    1. 0x304Continuous integration pipelinesBuild and test every change automatically with a fast pipeline: stages, fail-fast ordering, the test pyramid, and dealing with flaky tests. 28 min 0/2 exercises solved 28 min 0/2 exercises solved
    2. 0x405Artifacts, versions and cachingBuild once and promote the same artifact everywhere, version it traceably, keep builds reproducible, and speed them up with caches. 26 min 0/2 exercises solved 26 min 0/2 exercises solved
    3. 0x506Container images for deliveryPackage apps as small, secure, fast-building container images: layers and caching, multi-stage builds, non-root users and immutable tags. 28 min 0/2 exercises solved 28 min 0/2 exercises solved
  3. Unit 3 · 0/3 lessons

    Continuous delivery

    Deployment pipelines and environments, configuration and database changes, deployment strategies and GitOps. Badge: Release rider

    1. 0x607Continuous deliveryKeep every change releasable: deployment pipelines, environments, configuration kept out of code, and database changes that never need downtime. 28 min 0/2 exercises solved 28 min 0/2 exercises solved
    2. 0x708Deployment strategiesChoose how new versions reach users - recreate, rolling, blue-green, canary - and how to get back fast when one misbehaves. 28 min 0/2 exercises solved 28 min 0/2 exercises solved
    3. 0x809GitOpsMake Git the source of truth for what runs: declarative desired state, controllers that pull and reconcile, drift that heals itself, and rollbacks by revert. 26 min 0/2 exercises solved 26 min 0/2 exercises solved
  4. Unit 4 · 0/3 lessons

    Infrastructure as code

    Terraform configuration and plans, state, locking and drift, and configuration management with Ansible. Badge: Infrastructure coder

    1. 0x9010Infrastructure as codeDescribe servers, networks and buckets in versioned files, and let Terraform work out what to create, change and destroy. 30 min 0/2 exercises solved 30 min 0/2 exercises solved
    2. 0xA011State, locking and driftUnderstand Terraform state, share it safely with remote backends and locks, and detect and resolve drift between code and reality. 26 min 0/2 exercises solved 26 min 0/2 exercises solved
    3. 0xB012Configuration management and immutable infrastructureConfigure servers repeatably with Ansible’s idempotent tasks and inventories - and learn when to replace servers instead of changing them. 26 min 0/2 exercises solved 26 min 0/2 exercises solved
  5. Unit 5 · 0/3 lessons

    Running production

    Golden signals, SLOs and burn-rate alerts, incident response and blameless postmortems, and security in the pipeline. Badge: On-call hero

    1. 0xC013Monitoring and alertingWatch the four golden signals, measure latency with percentiles, set SLOs, and page people only for problems that matter - with burn-rate alerts. 28 min 0/2 exercises solved 28 min 0/2 exercises solved
    2. 0xD014Incident response and postmortemsHandle outages calmly with clear roles and severities, mitigate first, and learn from every incident with blameless postmortems. 26 min 0/2 exercises solved 26 min 0/2 exercises solved
    3. 0xE015DevSecOps: security in the pipelineShift security left: scan code, dependencies, secrets, images and infrastructure in every pipeline, protect the software supply chain, and keep pipeline credentials short-lived. 28 min 0/2 exercises solved 28 min 0/2 exercises solved
  6. Unit 6 · 0/1 lessons

    Capstone

    Retire Release Night: a pipeline runner, a release gate and a delivery dashboard for Byte Bakery. Badge: Release Night retiree

    1. 0xF016Capstone: retire Release NightPut it all together for Byte Bakery: run commits through the full delivery pipeline, gate production releases, and report the DORA metrics week by week. 45 min 0/3 exercises solved 45 min 0/3 exercises solved
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