swarmkit 1.12.0+git20170111.763.296fcfcf-2 (i386 binary) in ubuntu artful

 SwarmKit is a toolkit for orchestrating distributed systems at any
 scale. It includes primitives for node discovery, raft-based consensus,
 task scheduling and more.
 .
 Its main benefits are:
 .
   * Distributed: SwarmKit uses the Raft Consensus Algorithm in order to
     coordinate and does not rely on a single point of failure to perform
     decisions.
 .
   * Secure: Node communication and membership within a Swarm are secure
     out of the box. SwarmKit uses mutual TLS for node authentication,
     role authorization and transport encryption, automating both
      certificate issuance and rotation.
 .
    * Simple: SwarmKit is operationally simple and minimizes
      infrastructure dependencies. It does not need an external database to
      operate.Overview Machines running SwarmKit can be grouped together in
      order to form a Swarm, coordinating tasks with each other.
 .
 This package contains the Swarmkit command-line programs.