etcdserver/cluster_util.go
func getRemotePeerURLs(cl *membership.RaftCluster, local string) []string {
	us := make([]string, 0)
	for _, m := range cl.Members() {
		if m.Name == local {
			continue
		}
		us = append(us, m.PeerURLs...)
	}
	sort.Strings(us)
	return us
}
func getRemotePeerURLs(cl *membership.RaftCluster, local string) []string {
	us := make([]string, 0)
	for _, m := range cl.Members() {
		if m.Name == local {
			continue
		}
		us = append(us, m.PeerURLs...)
	}
	sort.Strings(us)
	return us
}
// getRemotePeerURLs returns peer urls of remote members in the cluster. The
// returned list is sorted in ascending lexicographical order.