Migrating ingress-nginx to Envoy Gateway: 7 Services, Zero Downtime, 6 Gotchas (A Real War Story)
Real production war story: migrating 7 services from ingress-nginx to Envoy Gateway on DigitalOcean with zero downtime. 6 gotchas discovered, cert-manager DNS-01 fix, Cloudflare tips, and the full cutover playbook.
