DNS服务器（bind）安装

1：安装
安装bind： yum install bind
启动服务: service named start
设置开机启动：systemctl enable named

2：配置
编辑配置文件 /etc/named.conf
中添加域
zone "dockerpaas.com" {
type master;
file "/var/named/dockerpaas.com";
};
修改相关配置项：
listen-on port 53 { 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";
allow-query { any; };
recursion yes;
dnssec-enable no;
dnssec-validation no;

3：新建 /var/named/dockerpaas.com 配置文件

$TTL 3H
@ IN SOA @ demo.com. (
0 ; serial
1D ; refresh
1H ; retry
1W ; expire
3H ) ; minimum
NS @
A 127.0.0.1
AAAA ::1

*.traefik IN A 192.168.1.99

（ 192.168.1.99：是traefik地址）

4：重启测试
systemctl restart named
配置域名服务器：vim /etc/resolv.conf
添加 nameserver 192.168.1.86

nslookup a.traefik.dockerpaas.com

返回结果