Docker MongoDB Container

Step 1: Create an Environment File

The first step is to create an environment file that will store our database password.

.env

DB_PASSWORD=Password1234

This file will be used to set the MONGO_INITDB_ROOT_PASSWORD environment variable in our Docker container.

Step 2: Create a Docker Compose File

Next, we'll create a Docker compose file that defines our MongoDB container.

mongo-docker-compose.yml

version: '3.9'

services:
  mongo-db:
    # Apple M1 Chip
    # platform: linux/amd64
    image: mongo:4.4.18
    container_name: mongo-db
    restart: always
    env_file:
      - .env
    environment:
      MONGO_INITDB_ROOT_USERNAME: root
      MONGO_INITDB_ROOT_PASSWORD: $DB_PASSWORD
    ports:
      - 27019:27017
    volumes:     
      - mongo_datadir:/data/db
    networks:
      - backend-network

networks:
  backend-network:
    driver: bridge

volumes:
  mongo_datadir:

This file defines a single service, mongo-db, which uses the official MongoDB 4.4.18 image and maps port 27019 on your local machine to port 27017 in the container.

Step 3: Start the Container

Now that we have our environment file and Docker compose file set up, it's time to start the container! Run the following command:

Now we can start the container.

docker-compose -f mongo-docker-compose.yml up -d

This will start the container in detached mode, meaning it will run in the background.

Step4: Test MongoDB Database Container

Once the container is running, we can test our database by creating a collection & some documents. Run the following commands:

Let us create a sample javascript file to create -

loadMovies.js

db = connect( 'mongodb://root:Password1234@127.0.0.1:27019/films?authSource=admin' );

db.movies.insertMany( [
   {
      title: 'Titanic',
      year: 1997,
      genres: [ 'Drama', 'Romance' ]
   },
   {
      title: 'Spirited Away',
      year: 2001,
      genres: [ 'Animation', 'Adventure', 'Family' ]
   },
   {
      title: 'Casablanca',
      genres: [ 'Drama', 'Romance', 'War' ]
   }
] )

Now we will create a database and some tables. 

Note: you should have MongoDB Shell Client installed locally.

db_password=Password1234

mongosh --host 127.0.0.1 --port 27019 --username root --password ${db_password} --authenticationDatabase admin --file loadMovies.js

Test the database objects-

readMovies.js

db = connect( 'mongodb://root:Password1234@127.0.0.1:27019/films?authSource=admin' );

printjson( db.movies.find( {} ) );

mongosh --host 127.0.0.1 --port 27019 --username root --password ${db_password} --authenticationDatabase admin --file readMovies.js

Step 5: Stop the Container

Finally, we can stop the container by running the following command:

docker-compose -f mongo-docker-compose.yml down

This will stop the container and remove it from memory.

That's it! We've successfully created and configured a Docker MongoDB container.