Docker Compose: Create a Python Application with MongoDB

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Tiempo de lectura: 2 minutos

Reading time: 2 minutes

In this tutorial, I will show you how to use Docker Compose to create a Python application with MongoDB. Docker Compose is a tool that allows you to define and run multi-container Docker applications.

Step 1: Install Docker and Docker Compose

To use Docker Compose, you first need to have Docker installed on your computer. You can download Docker from the official Docker website (https://www.docker.com/get-started). Additionally, you need to install Docker Compose, which you can download from the official Docker Compose website (https://docs.docker.com/compose/install/).

Step 2: Create the Python Application

To create the Python application that we will use in this tutorial, follow the same steps as in the previous tutorial.

Step 3: Create the docker-compose.yml file

Instead of creating a separate Dockerfile for each application container, we will use a docker-compose.yml file to define the containers. Here is an example of a docker-compose.yml file for a Python application with MongoDB:

version: '3'
services:
  mongo-db:
    image: mongo
    restart: always
  myapp:
    build: .
    restart: always
    ports:
      - "5000:5000"
    depends_on:
      - mongo-db
    environment:
      MONGO_DB_URL: mongodb://mongo-db:27017/mydatabase

This file defines two services: mongo-db and myapp. The mongo-db service uses the MongoDB image and automatically restarts if stopped. The myapp service uses the Dockerfile in the current directory and automatically restarts if stopped. Additionally, this service publishes port 5000 and depends on the mongo-db service. Finally, it defines the MONGO_DB_URL environment variable, which specifies the MongoDB database URL.

Step 4: Build and Run the Containers

Once you have the docker-compose.yml file, you can build and run the containers using the following command in the terminal:

docker-compose up

This command will build the containers and run them. You should now see the message “User inserted into the database” in the console.

Conclusion

In this tutorial, you have learned how to use Docker Compose to create a Python application with MongoDB. You have used a docker-compose.yml file to define the application containers and have run the containers using the “docker-compose up” command. With Docker Compose, it is easy to define and run multi-container Docker applications.

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