What's going on with Let's Encrypt?

Question

ubuntu

I hung up the certificate update on kroner, once a week I open the log and do not understand what is happening? How to check if certificates have been updated and how long they have?

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Processing /etc/letsencrypt/renewal/site.ru.conf
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The following certs are not due for renewal yet:
  /etc/letsencrypt/live/site.ru/fullchain.pem (skipped)
No renewals were attempted.
Upgrading certbot-auto 0.9.1 to 0.9.3...
Replacing certbot-auto...
Creating virtual environment...
Installing Python packages...
Installation succeeded.

-------------------------------------------------------------------------------
Processing /etc/letsencrypt/renewal/site.ru.conf
-------------------------------------------------------------------------------

The following certs are not due for renewal yet:
  /etc/letsencrypt/live/site.ru/fullchain.pem (skipped)
No renewals were attempted.

-------------------------------------------------------------------------------
Processing /etc/letsencrypt/renewal/site.ru.conf
-------------------------------------------------------------------------------

The following certs are not due for renewal yet:
  /etc/letsencrypt/live/site.ru/fullchain.pem (skipped)
No renewals were attempted.

-------------------------------------------------------------------------------
Processing /etc/letsencrypt/renewal/site.ru.conf
-------------------------------------------------------------------------------

All renewal attempts failed. The following certs could not be renewed:
  /etc/letsencrypt/live/site.ru/fullchain.pem (failure)