Centos 7 搭建DNS服务器

1.DNS原理看这篇文章

https://www.cnblogs.com/kubixuesheng/p/6260195.html

2.服务器准备

192.168.1.100  DNS服务器

192.168.1.101  DNS客户端

192.168.1.102  DNS客户端

3.安装DNS服务

DNS服务端执行

yum install -y bind bind-utils

DNS客户端要是想使用nslookup命令执行

yum install -y bind-utils

4.修改/etc/named.conf配置

options {
    listen-on port 53 { any; }; //此处修改为any
    listen-on-v6 port 53 { ::1; };
    directory     "/var/named";
    dump-file     "/var/named/data/cache_dump.db";
    statistics-file "/var/named/data/named_stats.txt";
    memstatistics-file "/var/named/data/named_mem_stats.txt";
    recursing-file  "/var/named/data/named.recursing";
    secroots-file   "/var/named/data/named.secroots";
    allow-query     { any; }; //此处修改为any

5.修改/etc/named.rfc1912.zones配置，在文件末尾加上如下代码

#DNS正向解析
zone "k8s.com" IN {
    type master;
    file "k8s.com.zone";
    allow-update { none; };
};

#DNS反向解析
zone "1.168.192.in-addr.arpa" IN {
    type master;
    file "k8s.com.local";
    allow-update { none; };
};

6.进入/var/named/目录，创建k8s.com.zone和k8s.com.local两个文件，名称对应上面的file

k8s.com.zone文件

$TTL 1D
@    IN SOA    @ rname.invalid. (
                    0    ; serial
                    1D    ; refresh
                    1H    ; retry
                    1W    ; expire
                    3H )    ; minimum
    NS    @
    A    192.168.1.100
www IN A 192.168.1.100
node1 IN A 192.168.1.101
node2 IN A 192.168.1.102

k8s.com.local文件

$TTL 1D
@    IN SOA    @ rname.invalid. (
                    0    ; serial
                    1D    ; refresh
                    1H    ; retry
                    1W    ; expire
                    3H )    ; minimum
    NS    @
    A    192.168.1.100
101 IN PTR node1.k8s.com.  
102 IN PTR node2.k8s.com.

7.修改服务端和客户端的DNS配置，修改为DNS服务器ip地址

vim /etc/sysconfig/network-scripts/ifcfg-enp0s3

 

 8.重启服务器和客户端的网卡，服务器启动named服务并设置开机自启

systemctl restart network

systemctl start named
systemctl enable named

9.验证DNS服务

正向解析：

 

 反向解析：

 

 10.设置DNS主从看这篇文章

https://blog.csdn.net/qq_40707090/article/details/123561997