Migrating from ingress-nginx to Traefik Without Rewriting Your Ingresses
How to move a cluster off the retired ingress-nginx by running Traefik next to it on the same Ingress objects: what the Kubernetes Ingress NGINX provider translates and what it does not, the parallel run and DNS cutover step by step, the IngressClass you must not let Helm delete, and the things I would tell anyone operating Traefik for the first time.