用2节点实现。采用heartbeat老版本2.x ， 采用自己编写的resource agent，没有采用OCF

1 安装freebsd——废话

2 安装apache php （略） postgres，并设置复制，见：

http://blog.csdn.net/zeeeitch/article/details/5928319

3 设置hosts文件 （第二节点略）

192.168.15.6  zh103
192.168.15.9  zh104  

4 设置ha.cf文件，（第二节点略）

ucast em1 192.168.15.9
node zh104
node zh103
ping 192.168.14.1
logfile /var/log/ha-log 
keepalive 2 
deadtime 20 
warntime 5 
initdead 40 
udpport 694  
auto_failback off  

5 authkeys文件：

auth 1
1 crc  

6 haresources 文件:

zh104 192.168.14.11/24/em0 mypgsql myapache 

7 通过haresources文件，生成xml文件：

rm /var/lib/heartbeat/crm/cib.xml /var/lib/heartbeat/crm/cib.xml.sig /var/lib/heartbeat/crm/cib.xml.last
python2 /usr/local/lib/heartbeat/haresources2cib.py --stdout -c ha.cf haresources > /var/lib/heartbeat/crm/cib.xml;chown hacluster  /var/lib/heartbeat/crm/cib.xml

8 apache php启动关闭代理脚本

#!/bin/sh
case $1 in
status)ps -ax | grep -v grep | grep -q "httpd" rc=$?if [ $rc = 0 ]; thenecho "apache is running."else echo "apache is stopped."fiexit $rc;;
start)/usr/local/etc/rc.d/apache22 onestart exit ;;
stop)/usr/local/etc/rc.d/apache22 onestopexit ;;esacexit 0

9 主机上postgres启动关闭代理脚本

#!/bin/sh
case $1 in
status)ps -ax | grep -q postmaster|grep -v grep rc=$?if [ $rc = 0 ]; thenecho "postgres is running."else echo "postgres is stopped."fiexit $rc;;
start)/usr/local/etc/rc.d/postgresql onestartexit ;;
stop)/usr/local/etc/rc.d/postgresql onestopexit ;;esacexit 0

10 从机上的postgres代理脚本（启动时，hotstandby转为master）

#!/bin/sh
case $1 in
status)ps -ax | grep -v grep | grep -q "postgres: writer" && psql -Upgsql -c "select pg_is_in_recovery()" postgres | grep -q  frc=$?if [ $rc = 0 ]; thenecho "postgres is running."else echo "postgres is stopped."fiexit $rc;;
start)touch /var/run/pg_st2ma_triggerwhile truedops -ax | grep -v grep | grep -q "postgres: writer" && psql -Upgsql -c "select pg_is_in_recovery()" postgres | grep -q  frc=$?if [ $rc = 0 ]; thenbreakfisleep 1doneexit 0;;
stop)#/usr/local/etc/rc.d/postgresql onestopexit 0 ;;esacexit 0

11 最后rc.conf自启动

heartbeat_enable="YES"