I’m trying to practice docker swarm. Our goal is to deploy the project with docker swarm, and we can use it as production by docker warm. Next goals, we will try to demo scale with 3 Linux hosts by docker swarm

So we understand how we scale our project big with docker swarm.

Deploy project with Docker Swarm

• Update network of all docker-compose services to external=true
• Initialize Docker Swarm (if not already initialized): If you haven't initialized Docker Swarm yet, run the following command in your terminal to initialize it on the current node:

docker swarm init

• Create an Overlay Network: Once Docker Swarm is initialized, you can create an overlay network using the following command:

docker network create --driver overlay NETWORK_NAME

Note: sometimes your project cannot run because of the network, you need to update networks of all services in the docker-compose file to → overlay Also, I got an error when I deploy the docker-compose file with the bridge network config, it creates a bridge network for the swarm env, then when I change the config in docker-compose to overlay network, the error is not gone. You need to remove that bridge network before deploying by Swarm again

networks:
  node-network:
    driver: overlay

• Deploy the services by docker swarm

docker stack deploy -c docker-compose.yml STACK_NAME

Manage your services

1. check stack deployment by a swarm

docker service ls

1. Check docker containers

docker ps

docker inspect CONTAINER_ID(or CONTAINER_NAME)

docker logs -f CONTAINER_ID(or CONTAINER_NAME)