coredns|局域网域名解析

安装

使用docekr安装,默认为linux/x86_64

services:
  coredns:
    image: coredns/coredns:latest
    ports:
      - 53:53/udp
    restart: always
    command: -conf /root/Corefile
    volumes:
      - ./config:/root
    hostname: coredns
    container_name: coredns

配置文件 Corefile

.:53 {
    forward . 223.5.5.5 223.6.6.6
    log
    errors
}

在启动CoreDNS之前，您需要确保系统中的53端口没有被其他服务占用。您提供的命令sudo lsof -i :53用于查看有无进程正在使用53端口。

53端口占用

如果发现systemd-resolve服务正在使用这个端口，您可以使用以下命令来停止并禁用该服务

sudo lsof -i :53
COMMAND       PID            USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
systemd-r 4016798 systemd-resolve   13u  IPv4 9156404      0t0  UDP localhost:domain 
systemd-r 4016798 systemd-resolve   14u  IPv4 9156405      0t0  TCP localhost:domain (LISTEN)

停止,禁用systemd-resolved服务

1 2	sudo systemctl stop systemd-resolved sudo systemctl disable systemd-resolved

停止后,在fish shell里发现报错

sudo lsof -i :53
sudo: 无法解析主机：server: 域名解析出现暂时性错误
COMMAND       PID USER   FD   TYPE  DEVICE SIZE/OFF NODE NAME
docker-pr 4020073 root    3u  IPv4 9169243      0t0  UDP 172.23.0.1:36982->172.23.0.2:domain 
docker-pr 4020073 root    4u  IPv4 9159545      0t0  UDP *:domain 
docker-pr 4020073 root    8u  IPv4 9169244      0t0  UDP 172.23.0.1:49782->172.23.0.2:domain 
docker-pr 4020073 root    9u  IPv4 9159669      0t0  UDP 172.23.0.1:40376->172.23.0.2:domain 
docker-pr 4020073 root   10u  IPv4 9175075      0t0  UDP 172.23.0.1:41665->172.23.0.2:domain 
docker-pr 4020073 root   11u  IPv4 9179143      0t0  UDP 172.23.0.1:35846->172.23.0.2:domain 
docker-pr 4020080 root    4u  IPv6 9175047      0t0  UDP *:domain 
sshd      4020645 root    5u  IPv4 9165329      0t0  UDP localhost:38262->127.0.0.53:domain 
sshd      4020728 root    5u  IPv4 9146662      0t0  UDP localhost:54842->127.0.0.53:domain

无法解析主机

检查DNS服务器是否正确配置。您可以通过运行cat /etc/resolv.conf来查看DNS服务器的配置。

cat /etc/resolv.conf

# This is /run/systemd/resolve/stub-resolv.conf managed by man:systemd-resolved(8).
# Do not edit.
#
# This file might be symlinked as /etc/resolv.conf. If you're looking at
# /etc/resolv.conf and seeing this text, you have followed the symlink.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "resolvectl status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs should typically not access this file directly, but only
# through the symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a
# different way, replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.

nameserver 127.0.0.53
options edns0 trust-ad
search .

nameserver 127.0.0.53 改成 127.0.0.1

/etc/hosts增加配置

1	127.0.0.1 server

参考

安装/设置coredns