Question

Why do I see 504 errors from my Ingress during deploys? But my ingress seem to be working fine. Why do I see this error.

Answer 1

This error occurs because of a race condition when the pod is deleted. When the pod is deleted, it basically shuts before the ingress knows it stops sending traffic. The easiest way out is to prevent the pod from shutting immediately. This is possible with a preStop hook.