用shell脚本实现自动切换内网和外网实现高可用

#!/bin/bash
#主从数据库的内外网IP
master_IP_N=
master_IP_W=
salver_IP_N=
salver_IP_W=
#mongo的内外网IP
mongo_IP_W=
mongo_IP_N=
#redis的主从内外网IP
redis_master_IP_W=
redis_master_IP_N=
redis_slave_IP_W=
redis_slave_IP_N=
#sphinx的内外网IP
sphinx_IP_W=
sphinx_IP_N=
#网站配置文件的位置
database_path=/home/caoy/database.php
mongo_path=/home/caoy/over_sea_stock.php
redis_path=/home/caoy/Rediska_connector.php
sphinx_path=/home/caoy/SphinxConnector.php
config_path=/data/check_ip_config/
#检测当前使用的网卡
function check_ip(){
IP_config=`cat $1  |grep $2 | cut -c1-2`
if [ "$IP_config" == "//" ];then
        ip_status=1
else
        ip_status=0
fi
}
#判断内网网卡是否故障
function check_network(){
nmap -sP $1 | grep "1 host up" >/dev/null || (sleep 5 ; nmap -sP $1) | grep "1 host up" >/dev/null
#ping $1 -c 5 > /dev/null
if [[ "$?" == "1" ]]; then
        check_ip $database_path $1
        if [[ "$ip_status" == "0" ]];then
                cp -r $config_path/database_w.php $database_path
                echo "cp database_w.php is ok!"
        fi
        check_ip $mongo_path $1
        if [[ "$ip_status" == "0" ]];then
                cp -r $config_path/over_sea_stock_w.php $mongo_path
                echo "cp over_sea_stock_w.php is ok!"
        fi
        check_ip $redis_path $1
        if [[ "$ip_status" == "0" ]];then
                cp -r $config_path/Rediska_connector_w.php $redis_path
                echo "cp Rediska_connector_w.php is ok!"
        fi
        check_ip $sphinx_path $1
        if [[ "$ip_status" == "0" ]];then
                cp -r $config_path/SphinxConnector_w.php $sphinx_path
                echo "cp SphinxConnector_w.php is ok!"
        fi
else
        check_ip $database_path $1
        if [[ "$ip_status" == "1" ]];then
                cp -r $config_path/database_n.php $database_path
                echo "cp database_n.php is ok!"
        fi
        check_ip $mongo_path $1
        if [[ "$ip_status" == "1" ]];then
                cp -r $config_path/over_sea_stock_n.php $mongo_path
                echo "cp over_sea_stock_n.php is ok!"
        fi
        check_ip $redis_path $1
        if [[ "$ip_status" == "1" ]];then
                cp -r $config_path/Rediska_connector_n.php $redis_path
                echo "cp Rediska_connector_n.php is ok!"
        fi
        check_ip $sphinx_path $1
        if [[ "$ip_status" == "1" ]];then
                cp -r $config_path/SphinxConnector_n.php $sphinx_path
                echo "cp SphinxConnector_n.php is ok!"
        fi
fi
}
#检测各个网卡是否通畅
check_network $master_IP_N
check_network $salver_IP_N
check_network $mongo_IP_N
check_network $redis_master_IP_N
check_network $redis_slave_IP_N
check_network $sphinx_IP_N