raft/node.go
func RestartNode(c *Config) Node {
	r := newRaft(c)

	n := newNode()
	n.logger = c.Logger
	go n.run(r)
	return &n
}
func RestartNode(c *Config) Node {
	r := newRaft(c)

	n := newNode()
	n.logger = c.Logger
	go n.run(r)
	return &n
}
// RestartNode is similar to StartNode but does not take a list of peers.
// The current membership of the cluster will be restored from the Storage.
// If the caller has an existing state machine, pass in the last log index that
// has been applied to it; otherwise use zero.