keepalived 切换脚步

#!/bin/bash 
while :
do
nginxpid=`ps -C nginx --no-header | wc -l`
if [ $nginxpid -eq 0 ];then
ulimit -SHn 65535 #在并发数很大的情况下，连接数过小会导致linux狂报错，所以直接在nginx启动前定义
/usr/local/nginx/sbin/nginx
sleep 5
nginxpid=`ps -C nginx --no-header | wc -l`
if [ $nginxpid -eq 0 ];then
/etc/init.d/keepalived stop
fi
fi
sleep 5 
done