Steps to configure cron jobs to execute commands | F5 BIG IP LTM 13.X

[Sumit_Kumar_Dub]

Hi All,

I need help to configure cron job to run below two commands on hourly basis. Could you please help me with the steps:

tmsh run cli script certificatereports.tcl > /var/tmp/cert-outputs.txt

echo "Message Body Here" | mailx -s "Subject Here" -a cert-outputs.txt YourMail-ID

Regards,

Sumit D

[Dario_Garrido]

Hello Sumit.

You should configure one script file and place it on this location

/etc/cron.hourly/yourscript

yourscript:

#!/bin/bash
tmsh run cli script certificatereports.tcl > /var/tmp/cert-outputs.txt
echo "Message Body Here" | mailx -s "Subject Here" -a cert-outputs.txt YourMail-ID

You should also change the permission (execute)

chmod a+x yourscript

Here is a F5 official reference

REF - https://support.f5.com/csp/article/K33730915

IMPORTANT: Take into account that those scripts are not migrating in case of upgrading

F5 gives you the chance to configure periodically executed scripts using iCalls, which is a native F5 solution.

REF - https://devcentral.f5.com/s/articles/what-is-icall-27404

KR,

Dario.

[jaikumar_f5 · Accepted solution]

Had this replied yesterday in the codeshare, nevertheless will add the same comment here - hoping it could help someone in future.

Hi Sumit,

Apologies on the late reply, Good to know that you already have smtp set.

The next easy step is to put a small script with any mail agent (sendmail or mail or mailx) and have that script run on cron for every month.

Goto /var/tmp/ and create a file as automatecertificatereports.sh.

Add the below code inside the automatecertificatereports.sh file.

#!/bin/sh
tmsh run cli script certificatereports.tcl > /var/tmp/cert-outputs.txt
 
from="abc@domain.com"
to="abc@domain.com,pqr@domain.com,xyz@domain.com"
subject="Automated SSL Certificate Report"
 
mail -s "$subject" -r "$from" -a "/var/tmp/cert-outputs.txt" "$to" << EOF
Hi Team,
 
Please find the attached SSL Certificate Report.
 
Thanks & Regards,
abc@domain.com
 
EOF

Change the permission to executable one.

chmod +x automatecertificatereports.sh

Now goto your crontab & do a list first to see the existing cron jobs running.

crontab -l

You should see some couple of disk monitors check etc etc.

Always put some good comments before you make an entry of your cronjob, Use crontab -e to edit/add your entries.

crontab -e

Goto the of the section and the below 2 lines,

## Section for Automated SSL Certificate Report - Monthly Cron - Start of month - 6 O'clk ##
0 6 1 * * /usr/bin/bash /var/tmp/automatecertificatereports.sh

You can edit this cron value according to your need. For testing, try running this for every day 1 AM report - 0 1 * * *

Hope this helps. Let us know if you have more concerns.