๐ Kubernetes Service Connectivity Issues: The Invisible Problem That Breaks Everything
If youโve worked with Kubernetes long enough, youโve probably seen this: ๐ Your pods are running ๐ Metrics look normal ๐ No major alerts But your servicesโฆ just canโt talk to each other. Request...

Source: DEV Community
If youโve worked with Kubernetes long enough, youโve probably seen this: ๐ Your pods are running ๐ Metrics look normal ๐ No major alerts But your servicesโฆ just canโt talk to each other. Requests timeout. APIs fail. And nothing clearly tells you why. โ ๏ธ The Problem Service-to-service communication failures in Kubernetes are deceptively hard to debug. Because the issue isnโt inside your application โ itโs somewhere in the system between services. ๐ Common Causes Here are the usual suspects: DNS Issues Service names donโt resolve correctly due to CoreDNS problems. Network Policies Traffic gets blocked silently by restrictive or misconfigured policies. Service / Endpoint Misconfig Wrong selectors or missing endpoints break routing. Port Mismatch Service port doesnโt match container port. Dependency Failures Downstream services are slow or unavailable. ๐ Why Itโs So Painful to Debug Typical debugging flow: kubectl logs kubectl describe pod kubectl get svc kubectl get endpoints You che