I manage a name based hosting site.
We have 500 domain names with the same IP.
My best guess as of 11/17/2020 4:30 PM
A domain that I thought was revoked has become a problem. The letsencrypt revoke procedure showed that it was revoked successfully. The output is at the end of this post under ====
The domain has the old .pem files under /etc/letsencrypt/live/drfrankmartincir/
There currently are no files under /etc/letsencrypt/renewal/ for the domain name; however, I do not know if the renewal procedure (I use the plain vanilla Letsencrypt script)
I start and stop apache whenever I need to add or delete new Domains. The server gets restarted for some Ubuntu updates
For some reason Apache refused to start until the /etc/apache2/sites-enabled/drfrankmartincir-le-ssl.conf was restored from a prior backup
I believe I have found the source of my problem. When I revoke the cert, in this case it did not delete the apache file /etc/apache2/sites-enabled/drfrankmartincir-le-ssl.conf. (it was really mixed case
In order for apache to start, it wanted to see the .pem files.