dnsmasq设置域名解析
一、安装dnsmasq
[root@10-13-181-14 ~]# yum -y install dnsmasq
[root@10-13-181-14 ~]# systemctl enable dnsmasq
二、dnsmasq配置文件
[root@10-13-181-14 ~]# rpm -ql dnsmasq
/etc/dbus-1/system.d/dnsmasq.conf
/etc/dnsmasq.conf
/etc/dnsmasq.d
/usr/lib/systemd/system/dnsmasq.service
/usr/sbin/dnsmasq
/usr/share/doc/dnsmasq-2.76
/usr/share/doc/dnsmasq-2.76/CHANGELOG
/usr/share/doc/dnsmasq-2.76/COPYING
/usr/share/doc/dnsmasq-2.76/COPYING-v3
/usr/share/doc/dnsmasq-2.76/DBus-interface
/usr/share/doc/dnsmasq-2.76/FAQ
/usr/share/doc/dnsmasq-2.76/doc.html
/usr/share/doc/dnsmasq-2.76/setup.html
/usr/share/man/man8/dnsmasq.8.gz
/var/lib/dnsmasq
三、泛域名解析设置
设置 *openresty-dev.2haohr.com 解析为 10.13.30.224
设置 *openresty-test.2haohr.com 解析为 10.13.66.19
[root@10-13-181-14 ~]# cat /etc/dnsmasq.d/openresty.conf
address=/openresty-dev.2haohr.com/10.13.30.224
address=/openresty-test.2haohr.com/10.13.66.19
四、cname解析设置
[root@10-13-181-14 ~]# cat /etc/dnsmasq.d/address.conf
#dev
cname = dev.2haohr.com,waf.dev.2haohr.com
cname = i-dev.2haohr.com,waf.i-dev.2haohr.com
cname = api-dev.2haohr.com,waf.api-dev.2haohr.com
cname = wework-h5-dev.2haohr.com,waf.wework-h5-dev.2haohr.com
[root@10-13-181-14 ~]# cat /etc/hosts
# dev
124.70.67.17 waf.i-dev.2haohr.com
119.3.238.177 waf.i-dev.2haohr.com
124.70.67.17 waf.dev.2haohr.com
119.3.238.177 waf.dev.2haohr.com
124.70.67.17 waf.api-dev.2haohr.com
119.3.238.177 waf.api-dev.2haohr.com
124.70.67.17 waf.wework-h5-dev.2haohr.com
119.3.238.177 waf.wework-h5-dev.2haohr.com
五、语法检查
[root@10-13-181-14 ~]# dnsmasq -test
六、重启dnsmasq
[root@10-13-181-14 ~]# systemctl restart dnsmasq
[root@10-13-181-14 ~]# systemctl status dnsmasq
cat /etc/crontab
附：同步脚步
/root/shell/auth_create_hosts_index.sh
# !/bin/env bash
# huangjinsheng
# 触发自动生成hosts网页版
# 触发自动同步dns服务器
file_input='/etc/hosts'
file_output='/usr/share/nginx/html/index.html'
create_time=$(date +%Y%m%d%H%M%S)
dns_slave_all="10.40.0.92 10.40.0.93"
dns_slave_port='18122'
#系统ip
test -e /usr/bin/curl || yum -y install curl
test -e /usr/sbin/ifconfig || yum -y install net-tools &>/dev/null
ip_gateway=$(route -n|tail -n +3|awk '{print $2}'|grep -v '0.0.0.0')
ip_interface=$(route -n|grep $ip_gateway |awk '{print $NF}')
ucloud_ip=$(ifconfig ${ip_interface}|grep inet|awk '{print $2}')
td_str=''
function create_html_head(){
echo '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />'
echo -e "<html>
<body>
<h1>dns文件生成时间-${create_time}-当前dns节点-${ucloud_ip}</h1>"
}
function create_table_head(){
echo -e "<table border="0">"
}
function create_td(){
# if [ -e ./"$1" ]; then
echo $1
td_str=`echo $1 | awk 'BEGIN{FS="|"}''{i=1; while(i<=NF) {print "<td>"$i"</td>";i++}}'`
echo $td_str
# fi
}
function create_tr(){
create_td "$1"
echo -e "<tr>
$td_str
</tr>" >> $file_output
}
function create_table_end(){
echo -e "</table>"
}
function create_html_end(){
echo -e "</body></html>"
}
function create_html(){
rm -rf $file_output
touch $file_output
create_html_head >> $file_output
create_table_head >> $file_output
while read line
do
echo $line
create_tr "$line"
done < $file_input
create_table_end >> $file_output
create_html_end >> $file_output
}
if [ ! -f /tmp/auth_create_hosts_index_md5sum.txt ];then
echo "md5对比文件/tmp/auth_create_hosts_index_md5sum.txt不存在,正在生成.."
md5sum /etc/hosts > /tmp/auth_create_hosts_index_md5sum.txt
else
echo "md5对比文件/tmp/auth_create_hosts_index_md5sum.txt存在,正在检验.."
md5sum_file=$(cat /tmp/auth_create_hosts_index_md5sum.txt |awk '{print $1}')
if [ $(md5sum /etc/hosts |awk '{print $1}') != ${md5sum_file} ];then
echo "md5校验结果:dns解析文件/etc/hosts已经被修改.触发nginx默认网页生成.."
mtime_ymd=$(stat /etc/hosts|grep -E "Modify"|awk '{print $2}')
mtime_HMS=$(stat /etc/hosts|grep -Ei "Modify" |awk '{print $3}'|awk -F":" '{print $1"-"$2"-"$3}'|awk -F"." '{print $1}')
mtime=${mtime_ymd}-${mtime_HMS}
[ -d /opt/dns/${mtime_ymd} ] || mkdir -p /opt/dns/${mtime_ymd}
\cp -f /etc/hosts /opt/dns/${mtime_ymd}/hosts-${mtime}
md5sum /etc/hosts &> /tmp/auth_create_hosts_index_md5sum.txt
#create_html
systemctl restart dnsmasq
systemctl enable dnsmasq
for dns_slave in $dns_slave_all
do
echo "rsync ${dns_slave} -- "
if [ $(ping -c3 ${dns_slave} 2>&1 |grep ttl|wc -l ) -ge 2 ];then
echo "正在更新dns从服务器 ${dns_slave}"
ssh -p${dns_slave_port} root@${dns_slave} "chattr -i /etc/hosts"
ssh -p${dns_slave_port} root@${dns_slave} "rpm -qa |grep ^rsync &>/dev/null || yum -y install rsync"
rsync -avz --delete -e "ssh -p ${dns_slave_port}" /etc/hosts root@${dns_slave}:/etc/hosts
ssh -p${dns_slave_port} root@${dns_slave} "rpm -qa |grep ^dnsmasq &>/dev/null || yum -y install dnsmasq"
ssh -p${dns_slave_port} root@${dns_slave} "systemctl stop dnsmasq"
ssh -p${dns_slave_port} root@${dns_slave} "systemctl status dnsmasq"
ssh -p${dns_slave_port} root@${dns_slave} "systemctl restart dnsmasq"
ssh -p${dns_slave_port} root@${dns_slave} "systemctl enable dnsmasq"
ssh -p${dns_slave_port} root@${dns_slave} "systemctl status dnsmasq"
ssh -p${dns_slave_port} root@${dns_slave} "chattr +i /etc/hosts"
else
echo "dns从服务器${dns_slave}故障..同步配置失败"
fi
done
else
echo "md5校验结果:dns解析文件/etc/hosts与上次对比没有变化"
fi
fi
echo " "
#create_html
cat /etc/crontab
#同步更新dns
* * * * * root sh /root/shell/auth_create_hosts_index.sh &>/dev/null
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