Intermediate

GitOps changed how I think about deployments. Instead of running commands against a cluster, I push to Git and watch the cluster converge to the desired state. It sounds simple, but the implications are profound. ArgoCD is my tool of choice for GitOps. Let me show you why, and how to get started. Why GitOps? The Philosophy First Before diving into ArgoCD, let’s understand why GitOps matters. Traditional deployment: Developer → kubectl apply → Cluster The problem: What is deployed? You have to query the cluster. Configuration drift happens silently. Rollbacks are manual and error-prone. There’s no audit trail beyond “someone ran kubectl.” ...

Kubernetes Network Policies are one of those features that everyone knows they should use but few actually understand. The YAML looks intimidating, the behavior is non-intuitive, and the mental model takes time to develop. I’ve spent hours debugging policies that “should work” but didn’t. Let me save you that pain with a visual approach to understanding Network Policies. The Default: Everything Talks to Everything By default, Kubernetes allows all pod-to-pod communication. Any pod can reach any other pod across any namespace. This is convenient for getting started but terrible for security. ...