healthcheck

type Checker struct {
	ConsecutiveFailures uint32                  // Consecutive failures count
	ContainerID         string                  // Container ID to check
	Containerizer       container.Containerizer // Containerizer used by the executor
	Done                chan struct{}           // Done chan is triggered when the checker has finished its work (task is unhealthy)
	Exited              chan struct{}           // Exited chan is triggered when the checker has freed its resources
	Healthy             chan bool               // Result chan
	Pid                 int                     // Pid in which we enter namespace
	TaskInfo            *mesos.TaskInfo         // The info of the checked task
	Quit                chan struct{}           // Quit chan is triggered by the core to tell the checker to stop its work
}