coreos/fleet — pull request #611 by bcwaldon (2014-07-02 21:51:39+00:00)
Title: Monitory etcd connectivity

Since the heartbeat provides presence information, a failed means the fleet server is no longer able to operate in the cluster. The Heart and Monitor pieces are now responsible for the Machine heartbeat. The Monitor provides a trigger for stopping, purging, and starting the fleet server in response to a failed heartbeat.