#ingress

DevOps & CI/CD Bug Report

cert-manager certificate stuck: HTTP-01 challenge wrong status code 404, expected 200

Ryan Pham · Oct 1, 2025 · 6 min read

A new subdomain's certificate sat in pending for hours with a self check error: wrong status code 404, expected 200. The challenge solver created its Ingress with an ingress class our controller ignored. Setting the class on the solver and checking the redirect path fixed issuance.

DevOps & CI/CD Bug Report

Argo Rollouts blue-green sent real users to the preview version: an Ingress on the wrong Service

Sofia Andersson · Jul 5, 2025 · 7 min read

During a blue-green release with Argo Rollouts, a third of production requests hit the unpromoted preview version: our Ingress pointed at a hand-made Service whose app label matched pods of both versions. How Rollouts manages selectors, how we found the leak, and keeping preview private.