Atlas Failover

This is a demo script for testing MongoDB Atlas failover.

Dependencies

To run this script, you need python 2.7 and the following libraries installed:

sudo pip install dnspython pymongo faker

Set the connection string

The connection string is hard-coded in replica_failover.py. Edit it to anything you want.

Run the application

The application would insert a fake document every 1 second. And print the primary node hostname and the email inserted.

python __main__.py

If you want to test retryWrites (which automatically retry writes when fails), simply add command line args true:

python __main__.py true

Test failover

In Atlas dashboard, find the button .... In the dropdown menu, you'll see "Test Failover".

Enjoy!