Create cluster with a node with running container

Good evening,
In my infrastructure, I have a cluster for the role of staging created with swarm and a single host for the production area. Because I’m beginning to migrate services in Docker I need to create a cluster for the production area. It’s possible to create a cluster from a host that has the engine docker version 1.12 and containers in a state run?
At the end of the cluster configuration in what state I find the containers that were previously on the single host?