把下面脚本放到，路径自己决定
/data/services/godaddy/ddns.sh
然后 crontab -e 添加，频率自己修改
*/5 * * * * /data/services/godaddy/ddns.sh >> /data/services/godaddy/ddns.log

顺便找了几个获取公网IP的接口
http://ip-api.com/json/?lang=zh-CN

有频率限制，不能短时间内重复调用，应该是因为可以查任意IP归属地，所以限制了
http://ip.taobao.com/service/getIpInfo.php?ip=myip
这个也可以任意查任意IP归属地
http://ip-api.com/json/113.97.18.125?lang=zh-CN

http://www.taobao.com/help/getip.php

http://pv.sohu.com/cityjson

ddns.sh

# 你的域名，注意不包括主机名
domain="king.com"
# 主机名，支持泛域名哦也支持 @
name="*" 
# 登录 godaddy 查看
key="xxxxxxxxxxxxxxxx" 
# 登录 godaddy 查看
secret="xxxxxxxxxxx"

headers="Authorization: sso-key $key:$secret"
cur_dateTime="`date +%Y-%m-%d,%H:%M:%S`";
echo $cur_dateTime;
# echo $headers
result=$(curl -s -X GET -H "$headers" \
"https://api.godaddy.com/v1/domains/$domain/records/A/$name")
dnsIp=$(echo $result | grep -oE "\b([0-9]{1,3}\.){3}[0-9]{1,3}\b")
echo "dnsIp:" $dnsIp

# 获取你的公网IP
ret=$(curl -s GET "http://pv.sohu.com/cityjson")
currentIp=$(echo $ret | grep -oE "\b([0-9]{1,3}\.){3}[0-9]{1,3}\b")
echo "currentIp:" $currentIp
if [ "$dnsIp" != "$currentIp" ];
then
    echo "Ips are not equal"
    request='[{"data":"'$currentIp'","ttl":3600}]'
    echo $request
    nresult=$(curl -i -s -X PUT \
 -H "$headers" \
 -H "Content-Type: application/json" \
 -d $request "https://api.godaddy.com/v1/domains/$domain/records/A/$name")
    echo $nresult
fi