Well, there's your problem--Let's Encrypt will only issue certs for public domains. However, it's entirely possible to generate certs on the cloud key itself; I've been doing it for the past 9 months or so. I'm generally following this guide:
Well, there's your problem--Let's Encrypt will only issue certs for public domains. However, it's entirely possible to generate certs on the cloud key itself; I've been doing it for the past 9 months or so. I'm generally following this guide: