Docker for Rails Developers

Deploying Our App on a Swarm

With our newly created docker-stack.yml, we have a description of our app that Swarm can use. We’re ready to deploy our app onto our (single-node) swarm.

First, we must remember to retarget our swarm:

$ eval $(docker-machine env local-vm-1)

Now we can deploy our app with the command:

$ docker stack deploy -c docker-stack.yml myapp
Creating network myapp_default
Creating service myapp_web
Creating service myapp_redis
Creating service myapp_database
Creating service myapp_db-migrator

This says, “Deploy the services described in docker-stack.yml as a stack called myapp.” You can see the various services being created.

We can list the services in our stack by running: