Design - Funky Penguin's Geek Cookbook

One thing that’s confusing from this post is the usage of the HA proxy.

In case we are able to install Traefik for SSL Termination ( I haven’t yet seen examples where I can actually use multiple replicas using V2), would we still need HA Proxy? Pl elaborate.

Would you have suggestions on how to integrate Traefik with Cert-manager so we can use a replicaset in K8s world?