Super simple check a list of certificates and output something if the cert expires within the warning period.
This is intended to be stuck in a daily cron job to watch for certificate expirations. If anything goes wrong or there is a cert that is about to expire, this code tells you about it.
Kind of just starting with go and wanted something to whip up, and so thought this might be useful later for someone.
Inspired by Kris Pruden's reference to this article:
Right now, everything is hardcoded. You probably want to change the
list of sites it checks and how many days before it warns you.
Good news! cert-check now supports command line arguments. The -notify argument reports any site below that threshold in days. All other arguments are considered sites to be checked.
Easy to run if the go system is installed:
go run check-cert.go okta.okta.com:443You can also precompile it for a specific architecture and run cert-check instead, which then doesn't require any go on the machine:
go build cert-check.go