HOWTO

How to install pyzmq in MS Windows host
* install python 2.7 from binary release
* get pip
* use pip to instal zmq: pip.exe install zmq

How to setup
* in VirtualBox host, e.g., MS Windows, launch the fence simulator
	python fence_daemon.py
* in Dual-head controllers (Virtualbox Guests), saying SPA & SPB, start the cluster
* copy fence_apc_vbox and fencing_vbox.py to /usr/sbin/ in both controllers.
* create fence device for SPA & SPB:
	pcs stonith create apc_vbox  fence_apc_vbox pcmk_host_list="SPA"  ipaddr="192.168.56.1"  port=1
	pcs stonith create apc_vbox2 fence_apc_vbox pcmk_host_list="SPB"  ipaddr="192.168.56.1"  port=2
* check fence devices if running
	pcs stonith show
* fence off SPB from SPA
	pcs stonith fence SPB --off
* reboot SPB from SPA
	pcs stonith fence SPB
* vice versa

Misc:
* check the fence simualtor w/o Pacemaker
./fence_apc_vbox --ip=192.168.56.1 --ipport=5556  --plug=1 --action=on
./fence_apc_vbox --ip=192.168.56.1 --ipport=5556  --plug=2 --action=off