CentOS 7 安装 dnsmasq 服务 实现内网DNS

Posted 2020-11-30 winstom

目录

• 安装
• 配置
• 服务管理
• 测试解析

安装

废话不多述，上来就安装

yum install -y bind-utils dnsmasq

配置

[root@jenkins ~]# rpm -ql dnsmasq
/etc/dbus-1/system.d/dnsmasq.conf
/etc/dnsmasq.conf               # 主配置文件
/etc/dnsmasq.d
/usr/lib/systemd/system/dnsmasq.service
/usr/sbin/dnsmasq               # 命令
/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

修改配置如下

[root@jenkins ~]# egrep -v '^#|^$' /etc/dnsmasq.conf
port=53
resolv-file=/etc/resolv.conf
strict-order
listen-address=192.168.1.122,127.0.0.1
addn-hosts=/etc/dnsmasq_hosts
cache-size=150
conf-dir=/etc/dnsmasq.d,.rpmnew,.rpmsave,.rpmorig

创建 /etc/dnsmasq_hosts 解析文件，并写入配置

[root@jenkins ~]# cat /etc/dnsmasq_hosts
192.168.1.90 vip01 vip01.k8s.com

服务管理

# 启动
systemctl start dnsmasq

# 关闭
systemctl stop dnsmasq

# 开机自启
systemctl enable dnsmasq

测试解析

[root@node01 ~]# dig vip01.k8s.com @192.168.1.122

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-9.P2.el7 <<>> vip01.k8s.com @192.168.1.122
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 53340
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 3

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;vip01.k8s.com.         IN  A

;; ANSWER SECTION:
vip01.k8s.com.      86400   IN  A   192.168.1.90

;; AUTHORITY SECTION:
k8s.com.        86400   IN  NS  k8s.com.

;; ADDITIONAL SECTION:
k8s.com.        86400   IN  A   127.0.0.1
k8s.com.        86400   IN  AAAA    ::1

;; Query time: 0 msec
;; SERVER: 192.168.1.122#53(192.168.1.122)
;; WHEN: Wed Nov 06 22:12:22 CST 2019
;; MSG SIZE  rcvd: 116