Split horizon DNS is not something I'm willing to do. I'll just rock out with .internal or .home.arpa, have step-ca and bind communicate to each other, either in step-issuer in kube or maybe even rfc2136 if i feel like a bit of the dns-01 strategy is in order. I slap the internal ca root certs everywhere, and keep my home infra out of the crt.sh logs.

I get it, I could just do *.mydomain.com and slap that wildcard cert everywhere, but it's still in the public logs..