Getting Started:

• Clone or download the repository containing the docker-compose.yml files.
• Open a terminal and navigate to the directory containing the docker-compose.yml file you want.

Note: you can change the ports, networks and volumes as you wish.

Start the database services:

docker-compose up -d

This command will create and start all the services defined in the docker-compose.yml file in detached mode (-d).

Environment Variables:

The docker-compose.yml file defines environment variables within itself to configure certain aspects of the database service (e.g., database name, username, password). You can customize these variables directly within the file.

Modifying Environment Variables in docker-compose.yml:

• Open the docker-compose.yml file with a text editor.
• Find the section defining environment variables for your database service.
• This section typically looks like the following:

environment:
      MYSQL_ROOT_PASSWORD: password
      MYSQL_DATABASE: dbname
      MYSQL_USER: dbuser
      MYSQL_PASSWORD: dbpassword

Here, you can modify the values after the equal sign (=) for each variable.

• For example, to change the database name to "new_database", edit the line to:

    MYSQL_DATABASE: new_database

Alternative: Using a .env File:

While modifying environment variables directly in the docker-compose.yml file allows for quick changes, it can be less secure and version control friendly.

As an alternative, you can create a .env file in the same directory as the docker-compose.yml file. This file should contain your desired environment variables in the format:

DATABASE_NAME=new_database
DATABASE_USER=my_user
DATABASE_PASSWORD=my_password

Modify the docker-compose.yml file by adding the following line under the service definition:

environment:
  DATABASE_NAME: ${DATABASE_NAME}
  DATABASE_USER: ${DATABASE_USER}
  DATABASE_PASSWORD: ${DATABASE_PASSWORD}

This tells Docker Compose to read environment variables from the .env file, allowing you to manage them separately from the main configuration file.

Important:

Never commit the .env file to version control as it may contain sensitive information like passwords. Consider using a .env.example file to provide an example of the .env file structure and prevent accidental commits of the actual .env file.

Stopping and Removing Services:

Stop all services:

docker-compose down

Remove all containers, volumes, and networks:

docker-compose down -v

Additional Notes:

This script provides a basic overview of using the Docker Compose file. Refer to the official documentation for Docker and Docker Compose for more advanced usage and troubleshooting:

• Docker: link
• Docker Compose: link
  The specific configuration options available in the docker-compose.yml file will depend on the database and its setup. Consult the specific documentation for your chosen database for further configuration details.