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    用shell脚本实现自动切换内网和外网实现高可用

    作者:admin 时间:2021-02-12 18:07

    首先说明下我们的配置文件,都是类似格式的,假如内网是192.168.0.3,外网是123.123.123.123,配置文件如下:

    $db['salver']['hostname'] = '192.168.0.3:3306';
    //$db['salver']['hostname'] = '123.123.123.123:3306';

    这个时候就是外网是注释的状态。走的是内网。
    说下思路,就是一个配置文件,复制出来2分放到别的地方,这两份一个里面设置的是内网,一个里面设置的是外网,如果内网不通的情况下,判断当前用的是内网还是外网,如果是内网的情况下,就把外网的配置文件复制到网站文件里,如果内网通了,就把内网的配置文件再复制到网站文件里。就相当于是内网IP是主,外网IP是备一样。把这个脚本放在计划任务里,1分钟执行一次。

    复制代码 代码如下:

    #!/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

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