Security

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. ...