Automating Container Image Updates with FluxCD (Hands-On Tutorial)

Modern GitOps workflows aim to keep your Kubernetes cluster fully synchronized with what is defined in Git. One powerful feature of Flux is Image Automation, which automatically updates container image tags in your Git repository whenever a new image becomes available. In this tutorial, we walk through how image automation works and how to troubleshoot a common issue involving Git authentication. 1. What is Flux Image Automation? FluxCD provides several components that work together to automate image updates. The workflow looks like this: Container Registry ↓ ImageRepository (scans tags) ↓ ImagePolicy (selects allowed tags) ↓ ImageUpdateAutomation (commits updates to Git) ↓ Flux Kustomization deploys updated workload Instead of manually updating image tags in Git, Flux automatically commits the new tag when a matching image appears in your container registry. 2. Repository Structure Used in This Lab Example GitOps layout: flux-minikube-lab ├── apps │ └── web-server │ ├── web-server.yam