Prepare:
详解 DNS 与 CoreDNS 的实现原理
调查
采用什么来搭建一个dns server？
1. BIND
Learn how to use BIND to set up your own server for resolving domain names.
How to Install and Configure DNS Server in Linux
2. Dnsmasq (dnsmasq - archlinux)
experience
Create a Home Network DNS Server Using DNSMasq
How to Setup a DNS/DHCP Server Using dnsmasq on CentOS/RHEL 8/7
Use dnsmasq to provide DNS & DHCP services
Dnsmasq setup
# https://somoit.net/linux/configure-simple-dns-server # https://oracle-base.com/articles/linux/dnsmasq-for-simple-dns-configurations # https://www.tecmint.com/setup-a-dns-dhcp-server-using-dnsmasq-on-centos-rhel/ yum install dnsmasq -y yum install bind-utils -y mkdir -p ~/dnsmasq DNSP=$(realpath ~/dnsmasq) IFC=$(ip route get 1 | awk '{match($0, /.+devs([A-Za-z.0-9]+)/, a);print a[1];exit}') IP=$(ip route get 1 | awk '{match($0, /.+srcs([.0-9]+)/, a);print a[1];exit}') DHCP_R=10.10.10.2,10.10.10.192
configure
echo "192.168.127.10 test.host.openness.com" > $DNSP/dns.addnhosts cat << EOF > $DNSP/dnsmasq.conf #/etc/dnsmasq.conf ##WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE ##OVERWRITTEN AND LOST. Changes to this configuration should be made using: ## virsh net-edit ansible_cloud ## or other application using the libvirt API. ## ## dnsmasq conf file created by libvirt strict-order pid-file=${DNSP}/dnsmasq.pid except-interface=lo bind-dynamic interface=$IFC dhcp-range=$DHCP_R dhcp-no-override dhcp-authoritative dhcp-lease-max=191 dhcp-hostsfile=${DNSP}/dhcp.hostsfile addn-hosts=${DNSP}/dns.addnhosts # -- # domain-needed # bogus-priv # expand-hosts # # # The address 192.168.0.176 is the static IP of this server # # You can find this ip by running ifconfig and look for the # # IP of the interface which is connected to the router. # listen-address=127.0.0.1 # listen-address=192.168.0.176 # bind-interfaces # # # Use open source DNS servers # server=8.8.8.8 # server=8.8.4.4 # server=208.67.220.220 # # # Create custom 'domains'. # # Custom 'domains' can also be added in /etc/hosts # address=/busyserver.net/192.168.0.176 EOF
start
/usr/sbin/dnsmasq --conf-file=$DNSP/dnsmasq.conf --leasefile-ro
validation
IP=$(ip route get 1 | awk '{match($0, /.+srcs([.0-9]+)/, a);print a[1];exit}') dig @$IP test.host.openness.com
restart
DNSP=$(realpath ~/dnsmasq) pkill dnsmasq /usr/sbin/dnsmasq --conf-file=$DNSP/dnsmasq.conf --leasefile-ro ps -ef | grep dnsmasq
or just sed a SIGHUB to reload configure
kill -HUP $(pidof dnsmasq) # or kill -SIGHUP $(pidof dnsmasq) # or kill -1 $(pidof dnsmasq)
add a new host entry
Linux – Simple DNS server using DNSmasq
echo "192.168.100.117 testhost.mydomain.com testhost" >> /etc/hosts
specified dsn host files
DNSP=$(realpath ~/dnsmasq) pkill dnsmasq /usr/sbin/dnsmasq --conf-file=$DNSP/dnsmasq.conf --leasefile-ro --addn-hosts=$DNSP/dns.addnhosts ps -ef | grep dnsmasq
still can not works, what's wrong? other sample configrue
can works by "--address"
/usr/sbin/dnsmasq --conf-file=$DNSP/dnsmasq.conf --leasefile-ro --addn-hosts=$DNSP/dns.addnhosts --address=/test.host.openness.com/192.168.127.10
default setting
cat /usr/lib/systemd/system/dnsmasq.service [Unit] Description=DNS caching server. After=network.target [Service] ExecStart=/usr/sbin/dnsmasq -k [Install] WantedBy=multi-user.target
REF:
OpenNESS，开源的边缘网络服务平台 EAA
coreDNS配置私有DNS服务器和上游DNS服务器
K8S official: 自定义 DNS 服务 , 自定义 DNS 服务 V1.17
K8S official: Pod 与 Service 的 DNS
K8S official: 调试 DNS 问题
配置自定义DNS服务 ETCD备份
CoreDNS系列1：Kubernetes内部域名解析原理、弊端及优化方式 CoreDNS VS kubedns
KubeDNS 和 CoreDNS
CoreDNS 插件系统的实现原理
CoreDNS 添加自定义DNS解析记录
详解 DNS 与 CoreDNS 的实现原理
kubernetes之coredns玩法 介绍了dnsmasq 和consul 用法
DNS解析中的A记录、AAAA记录、CNAME记录、MX记录、NS记录、TXT记录、SRV记录、URL转发等
https://somoit.net/linux/configure-simple-dns-server