Cron-Job Error Notifications
Mike Bronner • May 28, 2019devops
As part of your job you work with servers, are required to do dev-ops, and end up utilizing cron jobs for various things. If only there were an easy way to monitor cron jobs for failures?!
I was in a situation like that, where I didn't want to set up complicated monitoring solutions; I just wanted a quick email when something went wrong.
This file is part of sendmail and specifies which email aliases should be forwarded to which user. By default it looks something like this:
# /etc/aliases mailer-daemon: postmaster postmaster: root nobody: root hostmaster: root usenet: root news: root webmaster: root www: root ftp: root abuse: root noc: root security: root
Now, what I didn't know was that you can also specify forwarding to external email addresses here. So if you add the following to the end of the file:
# forward root to email root: firstname.lastname@example.org
You will get any notification that are sent to
root emailed to you. This is extremely helpful for monitoring a server that is acting strange.
Additionally, you can forward any of the other users set up on the server to the root user, which then gets forwarded on to you as well:
user1: root user2: root user3: root # forward root to email root: email@example.com
I hope this helps maintain your sanity, as it helped mine. :)