拿到ubuntu22.04，先改造dns：
$ resolvectl status
Global
Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
resolv.conf mode: stub
Link 2 (eth0)
Current Scopes: DNS
Protocols: +DefaultRoute -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
Current DNS Server: 183.60.83.19
DNS Servers: 183.60.83.19 183.60.82.98
root@VM-24-15-ubuntu:~# systemctl stop systemd-resolved
root@VM-24-15-ubuntu:~# systemctl disable systemd-resolved
Removed "/etc/systemd/system/dbus-org.freedesktop.resolve1.service".
Removed "/etc/systemd/system/sysinit.target.wants/systemd-resolved.service".
root@VM-24-15-ubuntu:~# resolvectl status
Failed to get global data: Unit dbus-org.freedesktop.resolve1.service not found.
root@VM-24-15-ubuntu:~# ll /etc/resolv.conf
lrwxrwxrwx 1 root root 39 Apr 23 2024 /etc/resolv.conf -> ../run/systemd/resolve/stub-resolv.conf
删软连接：
root@VM-24-15-ubuntu:~# rm -f /etc/resolv.conf
新建文件：
root@VM-24-15-ubuntu:~# cat /etc/resolv.conf
#nameserver 127.0.0.53
nameserver 183.60.83.19
nameserver 183.60.82.98
options edns0 trust-ad
search .
验证解析路径，走的自定义的183.60.83.19 ：
root@VM-24-15-ubuntu:~# nslookup google.com
Server: 183.60.83.19
Address: 183.60.83.19#53
Non-authoritative answer:
Name: google.com
Address: 142.251.45.142再改造网络配置，防止启动tinc就断网
1、记住网关：
root@VM-24-15-ubuntu:~# ip r | grep ^def
default via 10.0.24.1 dev eth0 proto dhcp src 10.0.24.15 metric 100
2、加route2网关
root@VM-24-15-ubuntu:~# cat /etc/iproute2/rt_tables
#
# reserved values
#
255 local
254 main
253 default
0 unspec
#
# local
#
#1 inr.ruhep
100 100 #eth0
3、加配置：
# cat /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg
network: {config: disabled}
4、，改网络配置，
原始文件：
root@VM-24-15-ubuntu:~# cat /etc/netplan/50-cloud-init.yaml
# This file is generated from information provided by the datasource. Changes
# to it will not persist across an instance reboot. To disable cloud-init's
# network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
version: 2
ethernets:
eth0:
dhcp4: true
match:
macaddress: 52:54:00:c2:7b:34
set-name: eth0
改为：
root@VM-24-15-ubuntu:~# cat /etc/netplan/50-cloud-init.yaml
# This file is generated from information provided by the datasource. Changes
# to it will not persist across an instance reboot. To disable cloud-init's
# network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
version: 2
ethernets:
eth0:
dhcp4: true
match:
macaddress: 52:54:00:c2:7b:34
set-name: eth0
addresses:
- 10.0.24.15/22 # 私有IP/子网掩码
routes:
- to: default
via: 10.0.24.1
nameservers:
addresses:
- 183.60.83.19 #上面命令中查到的腾讯云dns
- 183.60.82.98 #上面命令中查到的腾讯云dns
routes:
- to: 0.0.0.0/0 # 路由的目标地址。
via: 10.0.24.1 # 为通过路由的流量设置源 IP 地址。（网关）
table: 100 # eth0对应的路由表
routing-policy:
- from: 10.0.24.15 # 主网卡私网ip，设置源 IP 地址以匹配此策略规则的流量。
table: 100 # 路由表编号
priority: 300 # 指定路由策略规则的优先级，以影响处理路由规则的顺序。
# 数字越大，优先级越低：规则按优先级数字递增的顺序处理。
root@VM-24-15-ubuntu:~# netplan apply
** (generate:1964): WARNING **: 15:16:18.288: Permissions for /etc/netplan/50-cloud-init.yaml are too open. Netplan configuration should NOT be accessible by others.
减小权限：
root@VM-24-15-ubuntu:/etc/netplan# chmod 600 50-cloud-init.yaml
再次：
root@VM-24-15-ubuntu:/etc/netplan# netplan apply
tips:
如果是阿里云轻量服务器，会报错：
WARNING:root:Cannot call Open vSwitch: ovsdb-server.service is not running
这个不用理会，但是重启服务器会断网，显示network is unreachable
禁用 cloud-init 防止覆盖你的配置，阿里云轻量云默认会强制用 DHCP，会覆盖你手动写的静态 IP，必须禁用：
touch /etc/cloud/cloud-init.disabled
再次重启服务器，应该会好。