A rudimentary Dockerfile & docker-compose.yml for Python projects

docker-compose.yml

version: '3.7'

services:
  master:
    image: rednafi/locust-template:v1
    container_name: locust-master
    build:
      context: ./
    ports:
     - 8089:8089
    volumes:
      - ./:/code/
    command: -f /code/locustfiles/locustfile.py --master

  worker:
    image: rednafi/locust-template:v1
    volumes:
      - ./:/code/
    command: -f /code/locustfiles/locustfile.py --worker --master-host master

Dockerfile

#!/bin/bash

docker-compose down

# Remove dangling images (-q=quiet, -f=without prompt)
docker rmi $(docker images -q -f dangling=true)

# Remove all stopped containers
docker rm -v $(docker ps -a -q -f status=exited)

# Remove dangling volumes
docker volume rm $(docker volume ls -qf dangling=true)

# Spin up the new container
# The if-else and the getopts is to take in the worker argument
if getopts "n:" arg; then
docker-compose -f docker-compose.yml up \
                -d                      \
                --build                  \
                --scale worker=$OPTARG
else
docker-compose -f docker-compose.yml up \
                -d                      \
                --build                  \
                --scale worker=1
fi