How to Use Docker Stacks for Application Deployment

Docker Stacks allow you to deploy multiple services defined in a Compose file to a Docker Swarm. This article explains how to use Docker Stacks.

Creating a Stack File

Create a docker-stack.yml file with the following content:

version: '3'
services:
  web:
    image: nginx
    ports:
      - "80:80"
  db:
    image: mysql
    environment:
      MYSQL_ROOT_PASSWORD: example

Deploying the Stack

Deploy the stack to the swarm:

docker stack deploy -c docker-stack.yml my_stack

Managing the Stack

List the stacks running on the swarm:

docker stack ls

List the services in a stack:

docker stack services my_stack

Conclusion

Docker Stacks provide an easy way to deploy and manage multi-service applications on a Docker Swarm, simplifying complex deployments.