Docker Compose: Managing Multi-Container Applications
Docker Compose is a tool that allows you to define and manage multi-container applications using a simple YAML configuration file.
Why Use Docker Compose?
- Manages multiple containers with a single command.
- Defines services, networks, and volumes in a single file.
- Improves workflow for local development and testing.
How Docker Compose Works?
Docker Compose uses a YAML file to define services, networks, and volumes for a multi-container application.
1. Installing Docker Compose
Docker Compose comes pre-installed with Docker Desktop. To install it separately, follow the instructions on the official website.
2. Creating a docker-compose.yml File
Below is an example `docker-compose.yml` file for a simple web application:
version: '3.8'
services:
web:
image: nginx
ports:
- "8080:80"
db:
image: mysql
environment:
MYSQL_ROOT_PASSWORD: example
3. Running Docker Compose
Use the following command to start the services defined in your `docker-compose.yml`:
docker-compose up -d
Conclusion
Docker Compose simplifies multi-container application management. In the next post, we will explore how to use Docker Compose with environment variables and networking.