How can CRON jobs be created during deployment?
Cron job deployment via install.sh (bash)
Why bash?
It is usually available,
easy to understand and
stable
process
Caveat: definition of Cron in the script or config depending on the environment
Decide is what to do according to set environment variables
Write the crontab
Cleanup temporary files
Deployment
The bash script is expected by the configuration management system under a specific path and
called parameterized plain or by appointment
When it comes to the server by a cron server (ROLES contains "cron") is written a defined crontab
This also assumes that the Cron to be run, are actually stored in the specified directory and executable.
Example install.sh (adjustment necessary)
#!/bin/bash
if [ -z "$ROLES" ]; then
echo 'Roles not set!'
exit 1
fi
# Main
if [ "$ROLES" = "cron" ]; then
# write crontab file
echo '#Cron by install.sh' > tempfile
echo '00 09 * * 1-5 echo hello' >> tempfile
echo '00 15 * * * echo bla' >> tempfile
# cron example with custom logging
echo "* * * * * date >> /var/log/application/cron.log && cd /var/www/ && /usr/bin/php cron.php >> /var/log/application/cron.log 2>&1" >> tempfile
# Update crontab
crontab tempfile
# Clean Up
rm tempfile
fi
echo 'Done successfully.'Related tutorials
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