Swarm: a Docker-native clustering system 
swarm is a simple tool which controls a cluster of Docker hosts and exposes it as a single "virtual" host.
swarm uses the standard Docker API as its frontend, which means any tool which speaks Docker can control swarm transparently: dokku, fig, krane, flynn, deis, docker-ui, shipyard, drone.io, Jenkins... and of course the Docker client itself.
Like the other Docker projects, swarm follows the "batteries included but removable" principle. It ships with a simple scheduling backend out of the box. The goal is to provide a smooth out-of-box experience for simple use cases, and allow swapping in more powerful backends, like Mesos, for large scale production deployments.
Installation
######1 - Download the current source code.
go get github.com/docker/swarm######2 - Compile and install swarm
go install github.com/docker/swarm######3 - Nodes setup The only requirement for Swarm nodes is to run a regular Docker daemon.
In order for Swarm to be able to communicate with its nodes, they must bind on a network interface.
This can be achieved by starting Docker with the -H flag (e.g. -H 0.0.0.0:2375).
Currently, nodes must be running the Docker master version. Master binaries are available here: https://master.dockerproject.com/
Example usage
# create a cluster
$ swarm create
6856663cdefdec325839a4b7e1de38e8
# on each of your nodes, start the swarm agent
$ swarm join --token=6856663cdefdec325839a4b7e1de38e8 --addr=<docker_daemon_ip1:4243>
$ swarm join --token=6856663cdefdec325839a4b7e1de38e8 --addr=<docker_daemon_ip2:4243>
$ swarm join --token=6856663cdefdec325839a4b7e1de38e8 --addr=<docker_daemon_ip3:4243>
...
# start the manager on any machine or your laptop
$ swarm manage --token=6856663cdefdec325839a4b7e1de38e8 --addr=<swarm_ip:4243>
# use the regular docker cli
$ docker -H <swarm_ip:4243> info
$ docker -H <swarm_ip:4243> run ...
$ docker -H <swarm_ip:4243> ps
$ docker -H <swarm_ip:4243> logs ...
...
# list nodes in your cluster
$ swarm list --token=6856663cdefdec325839a4b7e1de38e8
http://<docker_daemon_ip1:4243>
http://<docker_daemon_ip2:4243>
http://<docker_daemon_ip3:4243>Participating
We welcome pull requests and patches; come say hi on IRC, #docker-swarm on freenode.
Creators
Andrea Luzzardi
Victor Vieux
Copyright and license
Code and documentation copyright 2014 Docker, inc. Code released under the Apache 2.0 license. Docs released under Creative commons.