We run a domain hosting service with over 3400 unique domains on one balancer. I was able to issue all certificates, by moving them away from the /etc/letsencrypt/ folder after about 500 or so and after all certificates were issued copying them all back to the folder. Now I can’t issue any new certificates. Renewing doesn’t work either.
I realize this sounds a little bit like putting a stick in my bike spokes while riding it and complaining about falling over afterwards, but maybe there is a solution I’m not seeing?
It produced this output:
Detail: Invalid response from http://example.com/.well-known/acme-challenge/AdIrNFmTJdqj_BxDTRWBkHasdfasdzy1uH7PmEdXsNlYJY: "
Operation System: Ubuntu 16.04
Root Acces: Yes