Netplan DNS不工作

Question

我正在尝试设置一个用于KVM来宾的桥接口。我可以成功地将SSH传输到同一网络上的其他计算机。我也可以直接ping 8.8.8.8。然而，当我尝试ping google.com时，我得到了：ping: google.com: Name or service not known。因此，似乎路由等工作正常，但DNS不工作。任何帮助都将不胜感激。下面是我当前的netplan配置：

# This is the network config written by 'subiquity'
network:
  version: 2
  renderer: networkd
  ethernets:
    enp1s0:
      dhcp4: yes
  bridges:
    br0:
      interfaces: [enp2s0]
      addresses: [10.0.0.20/24]
      routes:
      - to: default
        via: 10.0.0.1
      nameservers:
        addresses: [8.8.8.8, 8.8.4.4]
        search: []
      parameters:
        stp: false
        forward-delay: 0
      dhcp4: no

我在sudo netplan --debug apply上没有看到什么太有趣的东西。这是输出：

** (generate:7576): DEBUG: 16:06:02.092: starting new processing pass
** (generate:7576): DEBUG: 16:06:02.092: br0: adding new route
** (generate:7576): DEBUG: 16:06:02.092: We have some netdefs, pass them through a final round of validation
** (generate:7576): DEBUG: 16:06:02.092: enp2s0: setting default backend to 1
** (generate:7576): DEBUG: 16:06:02.092: Configuration is valid
** (generate:7576): DEBUG: 16:06:02.092: br0: setting default backend to 1
** (generate:7576): DEBUG: 16:06:02.092: Configuration is valid
** (generate:7576): DEBUG: 16:06:02.093: Generating output files..
** (generate:7576): DEBUG: 16:06:02.093: openvswitch: definition enp2s0 is not for us (backend 1)
** (generate:7576): DEBUG: 16:06:02.093: NetworkManager: definition enp2s0 is not for us (backend 1)
** (generate:7576): DEBUG: 16:06:02.093: openvswitch: definition br0 is not for us (backend 1)
** (generate:7576): DEBUG: 16:06:02.093: NetworkManager: definition br0 is not for us (backend 1)
(generate:7576): GLib-DEBUG: 16:06:02.093: posix_spawn avoided (fd close requested)
(generate:7576): GLib-DEBUG: 16:06:02.096: posix_spawn avoided (fd close requested)
DEBUG:netplan generated networkd configuration changed, reloading networkd
DEBUG:enp2s0 not found in {}
DEBUG:br0 not found in {}
DEBUG:Merged config:
network:
  bridges:
    br0:
      addresses:
      - 10.0.0.20/24
      dhcp4: false
      interfaces:
      - enp2s0
      nameservers:
        addresses:
        - 8.8.8.8
        - 8.8.4.4
        search: []
      parameters:
        forward-delay: 0
        stp: false
      routes:
      - to: default
        via: 10.0.0.1
  ethernets:
    enp2s0:
      dhcp4: true
  renderer: networkd
  version: 2

DEBUG:no netplan generated NM configuration exists
DEBUG:enp2s0 not found in {}
DEBUG:br0 not found in {}
DEBUG:Merged config:
network:
  bridges:
    br0:
      addresses:
      - 10.0.0.20/24
      dhcp4: false
      interfaces:
      - enp2s0
      nameservers:
        addresses:
        - 8.8.8.8
        - 8.8.4.4
        search: []
      parameters:
        forward-delay: 0
        stp: false
      routes:
      - to: default
        via: 10.0.0.1
  ethernets:
    enp2s0:
      dhcp4: true
  renderer: networkd
  version: 2

DEBUG:Link changes: {}
DEBUG:netplan triggering .link rules for lo
DEBUG:netplan triggering .link rules for enp2s0
DEBUG:netplan triggering .link rules for br0
DEBUG:netplan triggering .link rules for vnet0
** (process:7574): DEBUG: 16:06:02.790: starting new processing pass
** (process:7574): DEBUG: 16:06:02.790: br0: adding new route
** (process:7574): DEBUG: 16:06:02.790: We have some netdefs, pass them through a final round of validation
** (process:7574): DEBUG: 16:06:02.791: enp2s0: setting default backend to 1
** (process:7574): DEBUG: 16:06:02.791: Configuration is valid
** (process:7574): DEBUG: 16:06:02.791: br0: setting default backend to 1
** (process:7574): DEBUG: 16:06:02.791: Configuration is valid
DEBUG:enp2s0 not found in {}
DEBUG:br0 not found in {}
DEBUG:Merged config:
network:
  bridges:
    br0:
      addresses:
      - 10.0.0.20/24
      dhcp4: false
      interfaces:
      - enp2s0
      nameservers:
        addresses:
        - 8.8.8.8
        - 8.8.4.4
        search: []
      parameters:
        forward-delay: 0
        stp: false
      routes:
      - to: default
        via: 10.0.0.1
  ethernets:
    enp2s0:
      dhcp4: true
  renderer: networkd
  version: 2

Answer 1

不确定这是否真的是一个答案，但我确实解决了我的问题，所以我至少会结束这个问题。这是一个新的服务器设置，所以我只是重新安装Ubuntu，从零开始，由于某种原因，它现在正在工作，所以不知道我到底做了什么来修复它。但作为参考，下面是我最后得到的netplan配置：

network:
  version: 2
  renderer: networkd
  ethernets:
    enp2s0:
      dhcp4: false
      dhcp6: false
  bridges:
    br0:
      interfaces: [enp2s0]
      addresses: [10.0.0.20/24]
      gateway4: 10.0.0.1
      nameservers:
        addresses: [8.8.8.8,8.8.4.4]
      parameters:
        stp: false
        forward-delay: 0
      dhcp4: no
      dhcp6: no