Centos7 安装CoreDNS
1、下载二进制文件
wget https://github.com/coredns/coredns/releases/download/v1.5.0/coredns_1.5.0_linux_amd64.tgz
tar zxf coredns_1.5.0_linux_amd64.tgz -C /usr/bin/
2、创建用户
useradd coredns -s /sbin/nologin
3、编辑/etc/coredns/Corefile
.:53 {
# 绑定interface ip
bind 0.0.0.0
# 先走本机的hosts, https://coredns.io/plugins/hosts/
hosts {
# 解析的域名少,直接用hosts插件即可.
# 大量自定义域名解析,建议使用file插件使用.
192.168.10.50 test.linux08.com
192.168.10.51 www.linux08.com
# ttl
ttl 60
# 重载hosts配置
reload 1m
# 继续执行
fallthrough
}
# file enables serving zone data from an RFC 1035-style master file.
# https://coredns.io/plugins/file/
# file service.signed service
# 最后所有的都转发到系统配置的上游dns服务器去解析
forward . /etc/resolv.conf
# 缓存时间ttl
cache 120
# 自动加载配置文件的间隔时间
reload 6s
# 输出日志
log
# 输出错误
errors
}
更新插件使用:https://github.com/coredns/coredns
4、编辑/usr/lib/systemd/system/coredns.service
[Unit]
Description=CoreDNS DNS server
Documentation=https://coredns.io
After=network.target
[Service]
PermissionsStartOnly=true
LimitNOFILE=1048576
LimitNPROC=512
CapabilityBoundingSet=CAP_NET_BIND_SERVICE
AmbientCapabilities=CAP_NET_BIND_SERVICE
NoNewPrivileges=true
User=coredns
ExecStart=/usr/bin/coredns -conf=/etc/coredns/Corefile
ExecReload=/bin/kill -SIGUSR1 $MAINPID
Restart=on-failure
[Install]
WantedBy=multi-user.target
5、启动coredns
systemctl enable coredns
systemctl start coredns
systemctl status coredns
6、测试coredns
yum install dnstop bind-utils -y
执行以下命令;
dig @192.168.10.50 test.linux08.com
dig @192.168.10.50 www.linux08.com
dig @192.168.10.50 www.baidu.com
# 服务端结果:
[root@bj-dns ~]# dnstop eth0
Queries: 0 new, 4 total Fri Apr 8 18:13:18 2022
Sources Count % cum%
------------- --------- ------ ------
192.168.10.73 3 75.0 75.0
192.168.10.50 1 25.0 100.0