具体支持功能包括（官方原文）：
- The ClusterLabs stack, incorporating Corosync and Pacemaker defines an Open Source, High Availability cluster offering suitable for both small and large deployments.
- Detection and recovery of machine and application-level failures
- Supports practically any redundancy configuration
- Supports both quorate and resource-driven clusters
- Configurable strategies for dealing with quorum loss （when multiple machines fail）
- Supports application startup/shutdown ordering, regardless of which machine（s） the applications are on
- Supports applications that must/must-not run on the same machine
- Supports applications which need to be active on multiple machines
- Supports applications with multiple modes （eg. master/slave）
以下是一个用户的配置示例：
Asterisk集群配置方式参考：
http://ittroubleshooter.in/configure-asterisk-ha-cluster-drbd-rhelcentos-7/
FreeSWITCH集群配置方式参考：
https://inside-out.xyz/technology/how-to-configure-freeswitch-for-ha.html
注意，笔者仅分享此集群解决方案的资料，没有经过测试，读者可以参考官方文档来搭建测试。
