Scale Tester

About

This is a basic test suite load gen tester built on locust.io

Use

Prep

• Deploy an Atlas cluster
• Create a username and password
• Add your IP address to your IP Access List
• Press the connect button and choose "Connect your Application" then "Python" and make note of the connection string for later

Modifying load

• Edit locustfile and copy the one function in there to do whatever you want
  • Today this will create 11k docs with a random ID and binary payload and store them via upsert
• Use the tag directive for identifying the function within the Locust UI
• Use the task directive for task frequency (i.e. 2 will happen half as frequently as 1)
• Add any python packages to the requirements.txt file

Container names

• The build.sh and compose reference my DockerHub username. If you aren't me, change instances of graboskyc

Building the container

• Locust uses the same container for the master and workers
• Run the build.sh in bash to create the containers locally. It will auto tag it with an auto-incrementing version number and latest tags

Environment variables

• Copy the worker-variables.sample.env to worker-variables.env
• modify the MDBCONNSTRING field with your Atlas connection string

Running the test

• Run the run.sh and this will start the load test
• Hard coded in that script it will launch one master and 2 workers which you can modify in that script
• Open a web browser to http://localhost:8089

Ending the test

• Return to console and press control+c to end the compose stack

Results