未应用 Netplan DNS 名称服务器设置

Question

我从Linode租用了一个 VPS ，上面安装了 Ubuntu 20.04 LTS (Focal Fossa)。但 Linode 的默认 DNS 服务器无法解析我真正需要它解析的域名。因此，我尝试编辑我的 netplan 配置，将 DNS 服务器更改为 Google 的服务器，因为 VPS 显然是无头的。我编辑了文件 /etc/netplan/01-netcfg.yaml 以包含以下内容：

# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      dhcp4: yes
      nameservers:
        addresses: [8.8.8.8, 8.8.4.4]

Ubuntu 20.04默认使用networkd作为netplan后端。我检查了 YAML，它的格式正确。DHCP 默认情况下处于打开状态（通过设置 dhcp4: yes），将其关闭（通过设置 dhcp4: no）并不能解决该问题。eth0 是我的网络连接的名称ip a。但是，每当我sudo netplan apply保存 netplan 配置文件后运行时，活动名称服务器似乎都没有按照sudo systemd-resolve --status. 即使通过运行强制 networkd 重新启动sudo ip link set eth0 down和/sudo ip link set eth0 up或通过运行重新启动 systemd-resolved 也sudo systemctl restart systemd-resolved不会执行任何操作。

为什么在 Ubuntu Server 20.04 LTS 上更改 DNS 服务器如此困难？我在这里错过了什么吗？

预先非常感谢您的帮助，
约书亚

编辑： 输出sudo lshw -C network：

  *-network
       description: Ethernet controller
       product: Virtio network device
       vendor: Red Hat, Inc.
       physical id: 4
       bus info: pci@0000:00:04.0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: msix bus_master cap_list rom
       configuration: driver=virtio-pci latency=0
       resources: irq:20 ioport:c080(size=64) memory:febd3000-febd3fff memory:fe
008000-fe00bfff memory:feb80000-febbffff
     *-virtio2
          description: Ethernet interface
          physical id: 0
          bus info: virtio@2
          logical name: eth0
          serial: f2:3c:93:91:e5:ed
          capabilities: ethernet physical
          configuration: autonegotiation=off broadcast=yes driver=virtio_net
driverversion=1.0.0 ip=170.187.185.46 link=yes multicast=yes

输出sudo ls -al /etc/resolv.conf：

lrwxrwxrwx 1 root root 37 Feb 24 06:53 /etc/resolv.conf -> /run/systemd/resolve/stub-resolv.conf

输出sudo cat /etc/resolv.conf：

# This file is managed by man:systemd-resolved(8). Do not edit.
#
# 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 must 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 members.linode.com

输出sudo cat /etc/network/interfaces：

# ifupdown has been replaced by netplan(5) on this system.  See
# /etc/netplan for current configuration.
# To re-enable ifupdown on this system, you can run:
#    sudo apt install ifupdown

输出cat /etc/netplan/*.yaml：

# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      dhcp4: true
      dhcp4-overrides:
        use-dns: false
      nameservers:
        addresses: [8.8.8.8, 8.8.4.4]

Answer 1

转至https://netplan.io/reference/并查看有关DHCP 覆盖的部分。

/etc/netplan/01-netcfg.yaml...

network:
  version: 2
  renderer: networkd
  ethernets:
    eth0:
      dhcp4: true
      dhcp4-overrides:
        use-dns: false
      nameservers:
        addresses: [8.8.8.8, 8.8.4.4]

sudo netplan generate

sudo netplan apply

reboot＃ 如果需要