CentOS经过DNSpod实现动态域名

由于家里使用ADSL动态IP上网，有时在外面须要使用家里资源，本来使用的是TP-LINK自带的花生壳解析，用过以后发现很不稳定。由于本身注册了域名也已使用了DNSPOD解析。

1.新建脚本文件

vim ddns.sh

文件内容以下：

#!/bin/sh
                                                                                                                                                                                                                                                                     

                                                                                                                                                                                                                                                                     
# 全局变量表
arPass=arMail=""
                                                                                                                                                                                                                                                                     
# 得到外网地址
arIpAdress() {
    local inter="http://members.3322.org/dyndns/getip"
    wget --quiet --no-check-certificate --output-document=- $inter
}
                                                                                                                                                                                                                                                                     
# 查询域名地址
# 参数: 待查询域名
arNslookup() {
    local dnsvr="114.114.114.114"
    nslookup ${1} $dnsvr | tr -d '\n[:blank:]' | awk -F':' '{print $6}'
}
                                                                                                                                                                                                                                                                     
# 读取接口数据
# 参数: 接口类型 待提交数据
arApiPost() {
    local agent="Ddns/3.08"
    local inter="https://dnsapi.cn/${1:?'Info.Version'}"
    local param="login_token=${arID},${arToken}&format=json&${2}"
    wget --quiet --no-check-certificate --output-document=- --user-agent=$agent --post-data $param $inter
}
                                                                                                                                                                                                                                                                     
# 更新记录信息
# 参数: 主域名 子域名
arDdnsUpdate() {
    local domainID recordID recordRS recordCD
    # 得到域名ID
    domainID=$(arApiPost "Domain.Info" "domain=${1}")
    domainID=$(echo $domainID | sed 's/.\+,"id":"\([0-9]\+\)".\+/\1/')
    # 得到记录ID
    recordID=$(arApiPost "Record.List" "domain_id=${domainID}&sub_domain=${2}")
    recordID=$(echo $recordID | sed 's/.\+\[{"id":"\([0-9]\+\)".\+/\1/')
    # 更新记录IP
    recordRS=$(arApiPost "Record.Ddns" "domain_id=${domainID}&record_id=${recordID}&sub_domain=${2}&record_line=默认")
    recordCD=$(echo $recordRS | sed 's/.\+{"code":"\([0-9]\+\)".\+/\1/')
    # 输出记录IP
    if [ "$recordCD" == "1" ]; then
        echo $recordRS | sed 's/.\+,"value":"\([0-9\.]\+\)".\+/\1/'
        return 1
    fi
    # 输出错误信息
    echo $recordRS | sed 's/.\+,"message":"\([^"]\+\)".\+/\1/'
}
# 动态检查更新
# 参数: 主域名 子域名
arDdnsCheck() {
    local postRS
    local hostIP=$(arIpAdress)
    local lastIP=$(arNslookup "${2}.${1}")
    echo "hostIP: ${hostIP}"
    echo "lastIP: ${lastIP}"
    if [ "$lastIP" != "$hostIP" ]; then
        postRS=$(arDdnsUpdate $1 $2)
        echo "postRS: ${postRS}"
        if [ $? -ne 1 ]; then
            return 0
        fi
    fi
    return 1
}
                                                                                                                                                                                                                                                                     
###################################################
                                                                                                                                                                                                                                                                     
# 设置用户参数
arID="89322"
arToken="3222w2e3213e123421421424234"
#填写帐户的API token
 
                                                                                                                                                                                                                                                                     
# 检查更新域名
arDdnsCheck "anrip.com" "lab"

ps:以上代码来自http://www.anrip.com/post/872

咱们只须要将上面的

# 设置用户参数

arID="user@anrip.com"     //DNSPOD的API ID

arToken="anrip.net"                //DNSPOD的API Token

# 检查更新域名

arDdnsCheck"anrip.com"  "lab"     //须要更新的域名为anrip.com，主机为lab，就是lab.anrip.com

arDdnsCheck"anrip.net"  "lab"      //更新lab.anrip.net

修改为本身的信息便可

3.增长执行权限

chmod +x /root/ddns.sh

4.加入任务计划(5分钟执行一次)

echo "*/5  * * * * root /root/ddns.sh" >> /etc/crontab

计划任务执行状况能够查看/var/log/cron

说明：

若是在执行后发现

[root@localhost ~]# ./ddns.sh
./ddns.sh: line 24: nslookup: command not found
hostIP: 114.234.77.222
lastIP:
postRS: 114.234.77.222

若是你使用的是CentOS则执行

yum -y install bind-utils

或者是ubuntu的话

sudo apt-get install dnsutils