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GitOps with Argo CD and Flux

Git as the single source of truth for clusters: repository layout, Argo CD and Flux, Helm and Kustomize, secrets in Git, safe promotion between environments.

Course by
CNCF
Course code
GitOps
Version
2026
Lessons
29

These summaries follow the public outline of the course. I wrote every lesson in my own words and tested the commands on RHEL 10. They are not Red Hat training material. Take the official course for the full content and the hands-on labs.

Next course: Python

Parts and chapters

Part 1

Principles and layout

  1. 1Understand GitOpsGitOps principles4 lessons
    Lessons
    1. 1.1 Know the four principles
    2. 1.2 Compare push and pull deployments
    3. 1.3 Know the main tools
    4. 1.4 See the benefits for security
  2. 2Design the repositories and environmentsRepository structure4 lessons
    Lessons
    1. 2.1 Separate code and config
    2. 2.2 Use base and overlays
    3. 2.3 Choose branches or folders for environments
    4. 2.4 Use Helm charts in GitOps

Part 2

Tools

  1. 3Install and log in to Argo CDArgo CD getting started4 lessons
    Lessons
    1. 3.1 Install Argo CD
    2. 3.2 Log in
    3. 3.3 Connect a repository
    4. 3.4 Use the CLI
  2. 4Deploy apps with Argo CDApplications, sync and ApplicationSets5 lessons
    Lessons
    1. 4.1 Create an Application
    2. 4.2 Understand sync and health
    3. 4.3 Control the order with sync waves
    4. 4.4 Manage many apps
    5. 4.5 Limit teams with projects
  3. 5Deploy apps with FluxFlux getting started4 lessons
    Lessons
    1. 5.1 Bootstrap Flux
    2. 5.2 Add a source and a Kustomization
    3. 5.3 Install charts with HelmRelease
    4. 5.4 Operate Flux

Part 3

Secrets and promotion

  1. 6Handle secrets in GitOpsSecrets in Git4 lessons
    Lessons
    1. 6.1 Know the options
    2. 6.2 Use Sealed Secrets
    3. 6.3 Use SOPS with age
    4. 6.4 Use External Secrets Operator
  2. 7Promote releases safely between environmentsPromotion, image updates and security4 lessons
    Lessons
    1. 7.1 Update the image tag from CI
    2. 7.2 Automate tags with Flux image automation
    3. 7.3 Keep production safe
    4. 7.4 Secure the GitOps system