From my reading of the documentation and personal testing, the renew command of the certbot client doesn’t work on certificates that have been issued with the --manual option. I’m wondering if this is intended to change in the future?
I understand that if the renew is basically asking for a new certificate with the same parameters it wouldn’t make sense since manual mode require to solve the challenge. But in the website of let’s encrypt, on the principle of certificate issuance (https://letsencrypt.org/how-it-works/#certificate-issuance-and-revocation) it says that the challenge has to be solved once, for the validation of the private key of a set of domain. Then for renewal the client just need to send a Certificate Signing Request to the let’s encrypt server. So in the end even for a manual certificate it shouldn’t be needed to solve the challenge again to renew a certificate? Is there something that I misunderstood in the renewal process?