Linux基于Heartbeat配置httpd高可用服务(4)

###下面是开启hb_standby之后输出的日志信息，所有的资源被节点1接管
heartbeat[5115]: 2015/11/06_11:56:06 info: orasrv2.xlk.com wants to go standby [all]
heartbeat[5115]: 2015/11/06_11:56:06 info: standby: acquire [all] resources from orasrv2.xlk.com
heartbeat[5143]: 2015/11/06_11:56:06 info: acquire all HA resources (standby).
ResourceManager[5156]:  2015/11/06_11:56:06 info: Acquiring resource group: orasrv1.xlk.com IPaddr::192.168.21.1/24/eth0 httpd
IPaddr[5182]:  2015/11/06_11:56:06 INFO:  Resource is stopped
ResourceManager[5156]:  2015/11/06_11:56:06 info: Running /etc/ha.d/resource.d/IPaddr 192.168.21.1/24/eth0 start
IPaddr[5277]:  2015/11/06_11:56:06 INFO: Using calculated netmask for 192.168.21.1: 255.255.255.0
IPaddr[5277]:  2015/11/06_11:56:06 INFO: eval ifconfig eth0:0 192.168.21.1 netmask 255.255.255.0 broadcast 192.168.21.255
IPaddr[5248]:  2015/11/06_11:56:06 INFO:  Success
ResourceManager[5156]:  2015/11/06_11:56:06 info: Running /etc/init.d/httpd  start
heartbeat[5143]: 2015/11/06_11:56:07 info: all HA resource acquisition completed (standby).
heartbeat[5115]: 2015/11/06_11:56:07 info: Standby resource acquisition done [all].
heartbeat[5115]: 2015/11/06_11:56:07 info: remote resource transition completed.

七、小结
a、对于集群上节点之间的切换实质上是资源的接管，通常包括VIP分配回收，磁盘卸载挂载，以及服务的启停等。
b、对于备用节点，其相应的共享磁盘(非严格意义上)不可读写，服务处于停止状态。

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