Save and later restore Docker stack state

Question

I'm using docker swarm deploy -c docker-compose.yml somestack to deploy to a docker swarm. However, I can later scale it with docker service scale somestack_someservice=5 (or whatever). So now docker-compose.yml no longer reflects the system. My question is, is there any way to save off the current configuration of the stack, and then later reapply it, similar to how I originally created it (with docker-compose.yml)?

Answer 1

There is no direct way to generate docker-compose.yml file, although you can use docker service inspect --pretty <service-name> command to obtain all configuration in text/json format.

There are some chances we can try to create docker-compose.yml from it.

Also, think about lack of this feature as advantage. If you want to make some adjustments, make them in docker-comose.yml first and then call docker stack deploy to apply it.