Complete tutorial for wildcard cert support on k8s

Hi there,

Would you point me to a complete tutorial for setting up wildcard cert support on k8s, better with complete k8s template files?

And we have two additional questions:

1 Can we use more than one domain name in wildcard https certificate? As we hosted the same server for two different domain.
2 If we don’t use wildcard certificate, can we append more subdomain name for let’s encrypt client in traefik at runtime in k8s without interrupting existing connection?

We’re already using traefik in a staging k8s environment, the http part works flawlessly. According to the certbot (or its succesor) api, I understand there should be arguments of domain name passed in. But I don’t understand how these domain name are provided in traefik configuration.