add support for docker swarm

[xmnlab]

from chatgpt:

Docker Swarm does not have direct one-to-one equivalents for all Docker Compose commands. Below is a comparison of Docker Compose commands and their counterparts (or lack thereof) in Docker Swarm:

1. Commands with Direct Correspondents:

• docker-compose up

  • Swarm Equivalent: docker stack deploy
  • Details: docker stack deploy -c docker-compose.yml <stack_name> deploys services defined in the Compose file to a Swarm cluster.

• docker-compose down

  • Swarm Equivalent: docker stack rm
  • Details: docker stack rm <stack_name> removes the stack, including all services, networks, and volumes.

• docker-compose ps

  • Swarm Equivalent: docker stack ps
  • Details: docker stack ps <stack_name> lists the tasks (containers) in the stack, similar to how docker-compose ps lists containers.

• docker-compose logs

  • Swarm Equivalent: docker service logs
  • Details: docker service logs <service_name> fetches logs for a specific service. Unlike docker-compose logs, which can show logs for all services, in Swarm, you typically fetch logs service by service.

• docker-compose scale

  • Swarm Equivalent: docker service scale
  • Details: docker service scale <service_name>=<replica_count> scales a specific service. In Swarm, scaling is done per service rather than in bulk.

• docker-compose config

  • Swarm Equivalent: docker stack deploy --compose-file
  • Details: This isn't a direct equivalent but using --compose-file with docker stack deploy validates and deploys a Compose file in Swarm.

2. Commands without Direct Correspondents:

• docker-compose exec

  • Swarm Equivalent: None
  • Details: Docker Swarm does not directly support running arbitrary commands inside containers of a running service. You'd need to use docker exec on individual containers.

• docker-compose build

  • Swarm Equivalent: None (Partial)
  • Details: Docker Swarm does not build images; you should build them separately (e.g., using docker build) and push them to a registry. Then reference the built image in your Compose file.

• docker-compose run

  • Swarm Equivalent: None
  • Details: Swarm doesn’t have a direct equivalent of docker-compose run for running one-off commands in containers. You would typically use docker run for this purpose.

• docker-compose stop

  • Swarm Equivalent: None
  • Details: Docker Swarm manages service states automatically and does not have a direct stop equivalent for stopping services like docker-compose stop. You manage service availability by scaling down or removing the service.

• docker-compose start

  • Swarm Equivalent: None
  • Details: Similar to stop, Docker Swarm doesn’t have a direct equivalent to start stopped services.

• docker-compose restart

  • Swarm Equivalent: None
  • Details: Swarm does not have a single command to restart all services in a stack. You’d need to manually scale or redeploy services.

• docker-compose pull

  • Swarm Equivalent: None
  • Details: Docker Swarm does not have a direct command for pulling images. The images are automatically pulled when the service is deployed or updated.

• docker-compose up --no-start

  • Swarm Equivalent: None
  • Details: Swarm doesn’t have a feature equivalent to --no-start. Services are always started when they are deployed.

• docker-compose kill

  • Swarm Equivalent: None
  • Details: There is no direct equivalent for forcefully stopping services like docker-compose kill. You'd manage services differently in Swarm.

Summary:

• Direct Equivalents: up, down, ps, logs, scale, config
• No Direct Equivalents: exec, build, run, stop, start, restart, pull, up --no-start, kill

Docker Swarm commands are more service-oriented and focus on managing services and stacks in a production-like environment. Docker Compose commands, on the other hand, are more suited for local development and testing scenarios where you have direct access and control over individual containers.