Thanks Juergen for the quick response. I updated the certbot and now it prints info below.
Looks like the dry-run is successful. So now what should I do before Feb? Is it renewed? I want to make sure it will be smoothly renewed when you guys stop the old TLS-SNI-01.
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Processing /etc/letsencrypt/renewal/faxgun.com.conf
Cert not due for renewal, but simulating renewal for dry run
Plugins selected: Authenticator nginx, Installer nginx
Renewing an existing certificate
Performing the following challenges:
http-01 challenge for faxgun.com
http-01 challenge for www.faxgun.com
Waiting for verification…
Cleaning up challenges
new certificate deployed with reload of nginx server; fullchain is
/etc/letsencrypt/live/faxgun.com/fullchain.pem
** DRY RUN: simulating ‘certbot renew’ close to cert expiry
** (The test certificates below have not been saved.)
Congratulations, all renewals succeeded. The following certs have been renewed:
/etc/letsencrypt/live/faxgun.com/fullchain.pem (success)
** DRY RUN: simulating ‘certbot renew’ close to cert expiry
** (The test certificates above have not been saved.)