How to Rotate Log in MongoDB (5 min setup)

This is what I use to rotate my MongoDB log

Assumptions:  You have installed MongoDB and you can execute 'mongo' shell command-line utility from anywhere in your shell.

1. Create Javascript File:
   
   nano /home/myname/mongodb_rotate_log.js
   
   Add the following line:
   
   db.runCommand( { logRotate : 1 } );
   
   press CTRL-X, Y, Enter    (to save and exit)
   
   
2. Add to mongo shell command CRONTAB
   crontab -e
   
   Add the following line:
   
   33 3 * * 6 mongo admin /home/myname/mongodb_rotate_log.js
   
   that line will schedule log rotation every Saturday night at 3:33am.
   
   press CTRL-X, Y, Enter    (to save and exit)
   
   
3. Add shell command to clean-up after ## days
   
   crontab -e
   
   Add the following line:
   
   19 4 * * * find /log/ -type f -mtime +30 | xargs rm
   
   the line above will schedule log cleanup at /log/ directory recursively
   it will remove any file older than 30 days
   
   press CTRL-X, Y, Enter    (to save and exit)