lvs集群中的心跳用什么来实现?

答:keepalived.

在lvs集群中它提供了两种结点健康相关的应用:

  1. 监视server pool里各结点的状态,以供load balancer略过不健康的server

  2. 通过VRRP协议实现loader balancer之间的主备切换(failover)

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