py37-certbot question

Daniel Lysfjord lysfjord.daniel at
Thu Sep 10 22:21:41 UTC 2020

"Valeri Galtsev" <galtsev at> skrev 10. september 2020 kl. 23:48:

> Dear Experts,
> I hope, someone knows details of python3 based certbot. Namely, if run with "update" command, it
> updated certificates that will expire "soon". How soon, it doesn't say in man page, just soon. Does
> someone know how close to expiration cert should be to be considered by the script for renewal.
Tells me 30 days:)

> I use certbot since its python 2 version - for quite some time actually to renew LetsEncrypt
> certificates. With python2 version in the past I run cron job daily and I was restarting apache
> from that same script if certificate was updated. With python3 version when I switched to it I
> followed somebody's HOWTO, and just added to /etc/periodic.conf:
> weekly_certbot_enable="YES"
> weekly_certbot_service="apache24"
> And was living happily ever since. However, one of the machines is about 4 days before expiration,
> Letsencrypt sent me notification: update cert. I checked, and crond is runnning, /etc/periodic.conf
> is as expected, and now, 4 days before expiration script (with --dry run flag) indeed goes about
> renewing the cert. There is one weekly cron jobs set that will happen before actual expiration of
> my certs, so I somehow think all is OK and my cert will be renewed.
> But I am just curios how many days before expiration certbot does renew certificate that will
> expire "soon".
> Or should I probably switch it over to daily cron job?
> As every lazy sysadmin, I do prefer to set things up so they definitely work without my attention.
> And I do not want to be reminded to do something it it will still happen on its own. So, switch to
> daily cron job?
> Thanks.
> Valeri
> -- ++++++++++++++++++++++++++++++++++++++++
> Valeri Galtsev
> Sr System Administrator
> Department of Astronomy and Astrophysics
> Kavli Institute for Cosmological Physics
> University of Chicago
> Phone: 773-702-4247
> ++++++++++++++++++++++++++++++++++++++++
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