DNSmasq是一个小巧且方便地用于配置DNS和DHCP的工具，适用于小型网络，它提供了DNS功能和可选择的DHCP功能。它服务那些只在本地适用的域名，这些域名是不会在全球的DNS服务器中出现的（摘自百度百科）

环境：Centos7

一、服务端配置

1.使用yum安装dnsmasq

yum install dnsmasq

2.配置/etc/dnsmasq.conf

可以配置得很简单，只需要配置监听的IP和配置文件路径即可 listen-address=127.0.0.1,192.168.233.132 conf-dir=/etc/dnsmasq.d

3.配置映射文件

在/etc/dnsmasq.d目录下创建IP域名映射文件，文件名可以随意取，且可以多个，如：

[root@fl /etc/dnsmasq.d] $ cat address.conf address=/redis/192.168.233.128 address=/mongodb/192.168.233.132

4.启动服务

systemctl start dnsmasq

5.防火墙中开通DNS服务端口

firewall-cmd --permanent --add-port=53/tcp firewall-cmd --permanent --add-port=53/udp firewall-cmd --reload

二、客户端配置

客户端只需要在/etc/resolv.conf中配置DNS服务地址就好了，如：

nameserver 192.168.233.132

测试

按照上面的配置后，客户端就可以解析DNS服务端配置的域名了

[root@fl /] $ping redis PING redis (192.168.233.128) 56(84) bytes of data. 64 bytes from fl (192.168.233.128): icmp_seq=1 ttl=64 time=0.017 ms 64 bytes from fl (192.168.233.128): icmp_seq=2 ttl=64 time=0.076 ms 64 bytes from fl (192.168.233.128): icmp_seq=3 ttl=64 time=0.090 ms ^C --- redis ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 11016ms rtt min/avg/max/mdev = 0.017/0.061/0.090/0.031 ms [root@fl /] $ping mongodb PING mongodb (192.168.233.132) 56(84) bytes of data. 64 bytes from fl (192.168.233.132): icmp_seq=1 ttl=64 time=0.228 ms 64 bytes from fl (192.168.233.132): icmp_seq=2 ttl=64 time=0.977 ms ^C --- mongodb ping statistics --- 2 packets transmitted, 2 received, 0% packet loss, time 1000ms rtt min/avg/max/mdev = 0.228/0.602/0.977/0.375 ms