Ensure that you have docker and docker-compose installed. To analyze MongoDB database, you will also need to install MongoDB Compass.

Start all the services via the command:

docker-compose up

To stop all services, press Ctrl+C.

If you want to keep running the services even after closing the terminal, use the -d or --detach flag:

docker-compose up -d

The services created are:

• web
• asynq-server
• asynqmon
• prometheus
• redis
• mongo
• nginx

To simulate a distributed system, where there are multiple copies of judge/server running on different systems, use the scale flag from docker-compose. For example, if you want the web server to be running on 2 machines and the judge to be running on 3 different machines, use the command

docker-compose up --scale web=2 --scale judge=3

Once the application has started, a sample request to the server might looks like:

localhost:80/internal/simulate-concurrent-users

Note: nginx runs on port 80. You don't need to worry about which port the server runs on.

To access the application stats, visit Prometheus homepage at

localhost:9090

To access the judge statistics, visit the Judge Monitor at

localhost:8080

To access the databse, open up MongoDB Compass and use this connection string

mongodb://localhost:27017