certbot exit=0
Another instance of Certbot is already running.
Ask for help or search for solutions at https://community.letsencrypt.org. See the logfile /tmp/certbot-log-7zvcm4z3/log or re-run Certbot with -v for more details.
                                                                  Simulating renewal of an existing certificate for auth.hyeonworks.com and 2 more domains
Waiting 30 seconds for DNS changes to propagate

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Congratulations, all simulated renewals succeeded: 
  /etc/letsencrypt/live/auth.hyeonworks.com/fullchain.pem (success)
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