lightweight-healthcheck is a minimal but effective healthchecking/monitoring script.
- written in Bash & deployable on Linux or macOS
- email & SMS (via Twilio) notifications, including date/time and the hostname that sent the alert
- mail/SMS alert rate limiting, to avoid blowing through your Twilio/Mailgun quota
- customizable delay between first detecting a down condition and sending alert
- logging of down/alert/ok events
Make a copy of the script and put it somewhere like ~/scripts/healthcheck-website.sh. Make it executable. Change the variables at the top of the script, and customize the check function, to get the script set up for whatever you're monitoring. Schedule it via cron however frequently you want.
I use Mailgun to ensure reliable delivery of mail from my servers. Set it up for the system following eg. this guide.
SMS alerts are sent via Twilio. You'll need to configure that via the Twilio variables in the script.
The script requires the GNU version of date to be named gdate and be available in the PATH. Install it via Homebrew with brew install coreutils.