Pacemaker is a cluster resource manager. It achieves maximum availability for your cluster services (aka. resources) by detecting and recovering from node and resource-level failures by making use of the messaging and membership capabilities provided by your preferred cluster infrastructure (either Corosync or Heartbeat).
Pacemaker’s key features include:
监测并恢复节点和服务级别的故障
存储无关,并不需要共享存储
资源无关,任何能用脚本控制的资源都可以作为服务
Supports STONITH for ensuring data integrity
支持大型或者小型的集群
Supports both quorate and resource driven clusters
Supports practically any redundancy configuration
自动同步各个节点的配置文件
可以设定集群范围内的ordering, colocation and anti-colocation
Support for advanced service types
统一的,可脚本控制的cluster shell