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Debug Kubernetes Ingress 404 and 503 Errors

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Self-Hosting & Infra advanced 8 min read $0.01 Updated 2026-10-19

Layer-by-layer Kubernetes ingress debugging: ingress controller logs, ingressClassName, host and path rules, Service port and selector, empty endpoints, readiness probes, backend protocol and TLS, NetworkPolicy and annotations.

The ingress returns 404 or 503 although the pods run. Trace the path: DNS and load balancer, ingress class and rules, Service selectors and ports, endpoints, readiness probes and backend protocol.

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#kubernetes#ingress#networking#nginx#troubleshooting

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