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I just have a wildcard subdomain record. (CNAME: *.mydomain.com)
Then the traffic gets sent to Traefik which checks the request for what subdomain it is asking for and routes it accordingly.
It's just two label lines in each docker compose with whatever subdomain I want to use and a minute or two later it's gotten the certificates and it's available.
Ah, that would make it easy. I can't use a wildcard with most of my domains, but maybe I could set up subdomains to have this convenience for dev/test sites. Thanks!
I suspect it would be trivial to add a hook to dynamically create (and remove, maybe) DNS records, just haven't tried yet.
Out of curiosity, why cant you use a wildcard?
Lots of different hosts, multiple load balancers / ingress controllers.