Series

Analyzing K8s 5xx Errors: A 7-Step Debugging Guide for Ingress/Gateway API

5xx errors in Kubernetes are among the hardest to diagnose. This guide presents a 7-step checklist f…

Kubernetes Service Discovery Principles: From How CoreDNS Works to Headless Services

In Kubernetes, inter-service communication hinges on finding the right address. This guide takes a d…

Endpoints <none> · no endpoints available: 7 Causes and a 30-Second Diagnosis

When a Kubernetes Service dies with Endpoints <none>, isolate the cause among selector mismatch, a w…

Ingress 404 default backend · 503 no healthy upstream: a 30-second diagnostic chart

A decision table that maps Kubernetes Ingress 404 default backend, 503 no healthy upstream, and 502 …

Diagnosing Kubernetes MTU Issues — When ping Works but Large Responses Hang

If ping is fine but curl hangs only on large responses and the TLS handshake goes silent, you have a…