Check expiration date of SSL certificates periodically, then remind you via email.
This is primary intended to work on Heroku. Thanks to Heroku, sslreminder can work as free of charge.
By following commands, sslreminder checks 3 hosts
1.example.com, 2.example.com and 3.example.com every day.
It sends reminder to alice@example.com and bob@example.com if
any of certificates expire in 30 days.
git clone git@github.com:tkawachi/sslreminder.git
cd sslreminder
heroku create -b https://github.com/kr/heroku-buildpack-go.git
heroku config:set HOSTS=1.example.com,2.example.com,3.example.com \
EMAILS=alice@example.com,bob@example.com
heroku addons:add sendgrid:starter
heroku ps:scale clock=1
You can ensure that it works by looking logs.
heroku logs
If you want to be reminded earlier, set THRESHOLD_DAYS.
# Remind me 60 days before the expiration
heroku config:set THRESHOLD_DAYS=60
From address of email is defaulted to the first address of EMAILS.
You can change it by setting FROM.
heroku config:set FROM=taro@example.com