What is Docker Compose Overlay?

Can you explain what Docker Compose Overlay is?

Docker Compose Overlay is a feature that allows you to define and manage multi-container Docker applications using a single YAML file.

How does it differ from regular Docker Compose?

The overlay network allows containers to communicate across different Docker hosts, while regular Docker Compose is limited to a single host.

What are the benefits of using Docker Compose Overlay?

It simplifies the deployment of distributed applications, enhances scalability, and improves service discovery.

Can you give me an example of a Docker Compose Overlay file?

Sure! Here's a simple example:

version: '3'
services:
  web:
    image: nginx
    networks:
      - overlay_net
  db:
    image: postgres
    networks:
      - overlay_net
networks:
  overlay_net:
    driver: overlay