Alert Notification script to warn you about low
disk server space left on Linux / (Low Disk Space Notification via
SMS and E-mail)
Once again I've encountered a problem with a non operational
website on a CentOS Linux caused by a depleted disk space on the
server.
The disk has been full with data to it's maximum capacity because
the last website SQL and file data backup.
To prevent future unexpected server outages caused by a filled up
disk I've decided to implement a quick script to warn me when there
is a low disk space left on the server system. I was lazy to write
a disk monitoring script from scratch so I used the one present on
Send an Email Alert When Your Disk Space Gets Low nice
article.
I've done minor modifications to the script present on the article
shown above to make it report on an email the exact system hostname
from where it originates (helpful if you intend to run the script
on more than one linux servers).
The script is also accustomed to send an SMS message to your mobile
phone warning about the possible emerging disk full issues.
If you want to use
my
monitor_disk_space.sh script after the minor modifiations done to
it to report server host and send sms to your mobile check
here
Actually it seems too many old backups were just hanging there so I
installed a tiny script on a crontab to periodically clear up the
old backups.
Here is the script itself:
You can
download the clear_old_log_backups.sh script here
Both the
monitor_disk_space.sh
and
clear_old_backups
scripts should be prepared to run on a crontab.
In case if you intend to run the aforementioned two scripts you
would have to prepare a crontab records similar to the
following:
# clear old data backups
30 2 2,20 * * /usr/sbin/clear_old_log_backups.sh
# monitor and report if disk space is low
05,30,59 4 * * * /usr/sbin/monitor_disk_space.sh
That two works fine for me hopefully they would be of use to
somebody out there. Feel free to contact me here if you experience
some problems in setting up the scripts.