Using Traefik for hundreds of domains with Lets Encrypt SSL

Hi all,

I am trying to point hundreds of domains to a single service where pages are getting served using the HTTP host value. I am trying to get SSL certificates for these hundreds of domains. I have tried adding routes to Dynamic.toml for few domains and its working as well. Here are my questions:

  1. Is there any limit in traefik to handle a large number of Lets Encrypt certificates, apart from Lets Encrypt rate limits.

  2. Is there a better way to automatically generate SSL certificates for hundreds of domains instead of keep adding routes to Dynamic.toml and save them in acme.json.

Edit: I am using Traefik v2.0



I'd also like to know strategies re 2, how to deploy hundred to thousands domains on one cluster and get kind of an automatic SSL cert gen.