Cron task every minute with basic python logging
On Linux OS make crontab execute file cron1min.py once every minute to test cron and learn basic python logging.
appconf.py - application configuration
cron1min.py - application code
cron1min.info - empty log file
cron1min.ctxt - empty text file for console redirect
cron1min.dbug - empty debug log file
Configuration file appconf.py derives from dikei/Dictconfig example https://gist.github.com/dikei/1500194 which shows how to configure basic logging by incorporating (or importing) a specified python dictionary; and also derives from this reference, https://stackoverflow.com/questions/21455515/install-filter-on-logging-level-in-python-using-dictconfig, which shows how to install a filter in the logging dictionary configuration.
Why Crontab Scripts Are Not Working? https://askubuntu.com/questions/23009/why-crontab-scripts-are-not-working
Run a Crontab Job Using Anaconda Environment? https://stackoverflow.com/questions/36365801/run-a-crontab-job-using-an-annaconda-env
Save the project files in a project folder owned by the Linux User such as the following:
/media/Users/YourUserName/ProjFolder
Execute crontab:
user:~$ crontab -e
Add enabled cron task [1] to crontab via default editor:
# [1] task below runs once every minute to test cron functionality and basic python logging
* * * * * python /media/Users/UserName/ProjFolder/cron1min.py >> /media/Users/UserName/ProjFolder/cron1min.ctxt 2>&1
The task [1] setup shown above includes the absolute path to the project folder and redirects the console log output to the file cron1min.ctxt inside the project folder.
Activate the debug file to show the python version executed by the crontab.
You may need to add the python environment path in crontab as described in these resources:
Why Crontab Scripts Are Not Working? https://askubuntu.com/questions/23009/why-crontab-scripts-are-not-working
Run a Crontab Job Using Anaconda Environment? https://stackoverflow.com/questions/36365801/run-a-crontab-job-using-an-annaconda-env
Add/enable crontab task [1] as shown above then navigate to the project folder.
To monitor log file (Ctrl-C to cancel):
~$ tail -f cron1min.info
2017-09-02 16:00:01 INFO Sat Cron fired
2017-09-02 16:01:01 INFO Sat Cron fired
To monitor text file (Ctrl-C to cancel):
~$ tail -f cron1min.ctxt
2017-09-02 16:00:01 INFO Sat Cron fired
2017-09-02 16:01:01 INFO Sat Cron fired
To monitor debug log file (Ctrl-C to cancel):
~$ tail -f cron1min.dbug
The debug log is disabled by default in file appconf.py so its output will be blank. Remove the leading # sign in appconf.py to enable debug log output. Insert the leading # sign in appconf.py to disable debug log output.
Execute crontab:
user:~$ crontab -e
To disable task [1] insert a leading # sign in second line as shown below:
# [1] task below runs once every minute to test cron functionality and basic python logging
#* * * * * python /media/Users/UserName/ProjFolder/cron1min.py >> /media/Users/UserName/ProjFolder/cron1min.ctxt 2>&1
Disable crontab task [1] as shown above then navigate to the project folder.
Clear log file:
~$ > cron1min.info
Clear text file:
~$ > cron1min.ctxt
Clear debug log file:
~$ > cron1min.dbug