Overview

YAML Course

Learn YAML for configs and DevOps: syntax, JSON differences, Kubernetes and CI workflows, and debugging.

This course teaches YAML as a human-friendly configuration language used in Kubernetes, CI pipelines, and application settings. It is not a click-by-click guide to a formatter. You will learn YAML structure, how it differs from JSON, real DevOps scenarios, common indentation mistakes, and a debugging workflow before you apply manifests or merge config changes.

Who this course is for

  • Platform and DevOps engineers editing manifests and workflows
  • Backend developers maintaining docker-compose or Helm values
  • Full-stack developers who receive YAML errors from CI or kubectl

What you will learn

  1. Mappings, sequences, and scalars—the building blocks of YAML
  2. When YAML beats JSON for configs—and when it does not
  3. Patterns in Kubernetes Deployments and GitHub Actions files
  4. Indentation, tabs, and typing mistakes that break parsers
  5. A practical validate → fix → format workflow with line/column hints

Use the related YAML Formatter to experiment, but remember: valid YAML proves syntax—not that a manifest is safe or correct for your cluster.

Start lesson 1
JSON Schema for Practical API ValidationUse JSON Schema to validate API payload shape, catch contract drift, and make debugging less dependent on manual inspection.JSON vs YAML for Config FilesCompare JSON and YAML for developer configuration, CI files, Kubernetes manifests, API examples, and machine-generated data.