Ubuntu Server 无头启动 + 配置

最近整了一套 Z270 + 1240v6，打算无头启动（连显卡都无的那种！），结果踩坑了，拔了显卡之后网络挂壁，而且CPU风扇慢转。

以为是内核模块挂了导致 kernel panic，排查了好几个小时，终于看到这篇博文，是 PCIE 变动导致网卡名称改变的问题，遂修改 netplan 为：

network:
  version: 2
  ethernets:
    enp1s0:
      dhcp4: true
    enp2s0:
      dhcp4: true
    enp3s0:
      dhcp4: true
    enp4s0:
      dhcp4: true
    enp5s0:
      dhcp4: true

重启解决！后面进去一看，哎，正好是跑到了 enp1s0 的位置！

Edit: 其实可以使用 netplan 的 MAC match 功能进行指定，可以有效解决这些问题。

---

最终配置

netplan:

network:
  version: 2
  ethernets:
    onboardeth:
      match:
        macaddress: aa:bb:cc:dd:ee:ff
      dhcp4: false
      addresses:
        - 192.168.1.x/24
        - 192.168.8.x/24
      routes:
        - to: default
          via: 192.168.1.1
        - to: 192.168.255.y/25
          via: 192.168.8.z
      nameservers:
        addresses:
          - 192.168.1.1

/etc/udev/rules.d/99-usb-serial-getty.rules:

ACTION=="add", SUBSYSTEM=="tty", ATTRS{idVendor}=="1a86", ATTRS{idProduct}=="7523", RUN+="/usr/bin/stty -F /dev/%k 115200", TAG+="systemd", ENV{SYSTEMD_WANTS}="serial-getty@%k.service"

lxd + vxlan 隔离网络配置：

https://artivis.github.io/post/2024/lxc-isolated/

name: lxdbr2
description: ipv4 only internet isolated
type: bridge
config:
  security.acls: external-only
  security.acls.default.egress.action: allow
  security.acls.default.ingress.action: allow
  ipv4.address: 10.122.156.1/24
  ipv4.nat: 'true'
  ipv6.address: none

name: lxdbr1
description: vxlan to global v6
type: bridge
config:
  tunnel.lxdv6.id: 'abcd'
  tunnel.lxdv6.interface: enp3s0
  tunnel.lxdv6.local: 192.168.8.x
  tunnel.lxdv6.port: '4789'
  tunnel.lxdv6.protocol: vxlan
  tunnel.lxdv6.remote: 192.168.8.z
  ipv4.address: none
  ipv6.address: none

/etc/systemd/system/wol.service:

[Unit]
Description=Enable Wake On Lan
 
[Service]
Type=oneshot
#ExecStart=/bin/bash -c 'for a in {1..9}; do echo /usr/sbin/ethtool --change enp"${a}"s0 wol g || true; done'
ExecStart=/etc/initwol.sh


[Install]
WantedBy=basic.target

有用的命令：

systemctl enable serial-getty@ttyUSBx