Flux CD: Course Handouts

The written companions to the Flux CD course by DevCloudLab.
One handout per lecture: the concepts, the commands, the manifests, all copyable.

→ More hands-on cloud-native courses at DevCloudLab.com

How to use these

Each lecture in the course links to its handout here. Watch the lecture, then keep the handout: every command and manifest is in a code block you can copy straight out of the page with the button in its top-right corner.

Where a lecture was recorded before a tool changed, the handout gives the current working command and flags what the video shows, in a note like this:

Since this video was recorded: the older form no longer works on current versions. The command above is the current equivalent.

Handouts

Section 1: Introduction

• 2. Understanding GitOps
• 3. Introduction to Flux CD and its role in Kubernetes deployments
• 4. How is GitOps different from DevOps?
• 5. Benefits of automating deployments with Flux CD

Section 2: Getting started with Flux CD

• 1. Installing and configuring Git
• 2. Kubernetes cluster setup
• 4. Installing and bootstrapping Flux CD
• 5. Syncing Kubernetes resources with Flux CD
• 6. Flux CD workflows and automation processes
• 7. Implementing declarative infrastructure with Flux CD
• 8. Migrating off the removed Flux beta APIs

Section 3: Flux CD and Helm

• 1. Understanding Helm and its interaction with Flux CD
• 2. Deploying applications using Flux CD with Git as the Helm chart source
• 3. Modifying the Helm chart and overriding the default values
• 4. (Optional) Creating a private Helm repository
• 5. Using HTTP Helm repositories with Flux CD
• 6. Using OCI Helm repositories with Flux CD
• 8. Using ECR as a Helm repository with EKS and Flux CD
• 9. Automating Helm Release upgrades
• 10. Installing a web UI for Flux CD (Flux Operator replaces Weave GitOps)

Section 4: Flux CD and Kustomize

• 1. Flux CD and Kustomize
• 2. Different Git directory structuring methods
• 3. Restructuring our repository to follow best practices
• 4. Using Flux CD with the Monorepo approach
• 5. Restructuring the repository to follow the multi-tenancy approach
• 6. Onboarding tenants and enforcing restrictions: the dev team
• 7. Onboarding tenants and enforcing restrictions: the admin team

Section 5: Flux CD security

• 1. Section introduction: Flux CD security
• 2. Secrets encryption with Bitnami’s Sealed Secrets
• 3. Flux CD’s Kustomization integration with Mozilla SOPS
• 4. Secrets encryption with GPG
• 5. Secrets encryption with Age
• 6. Secrets encryption with HashiCorp Vault (and OpenBao)
• 8. Validating the integrity of Helm charts using Cosign

Section 6: Image automation

• 1. What is image automation
• 2. Image automation with public registries
• 3. Image automation with private registries

Section 7: Flux CD notification automation

• 1. Section introduction: Flux CD notification automation
• 2. Sending Flux CD notifications to Slack
• 3. Flux CD automatic reconciliation using webhooks

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