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I use acme-tiny (with --acme-dir) and set up nginx to point the /.well-known/acme-challenge to a directory acme-tiny can write to. It should be possible to do r

• icebraining 10y ago
  +1, if you have just one server, it's merely a matter of adding location /.well-known/acme-challenge/ { alias {directory}; try_files $uri =404; } to the Nginx config of each site, then having a script on cron that generates the csr and calls acme_tiny. It's fairly easy to set up and you can be reasonably sure it won't screw up your site if it fails for some reason.