在 Ubuntu 18.04 专用服务器下使用 netplan 设置网桥的问题

在 Ubuntu 18.04 专用服务器下使用 netplan 设置网桥的问题

我需要一些有关服务器、网络规划和网桥的帮助。

我想在我的 ubuntu 18.04 服务器下设置一个 kvm,以便从外部访问。所以我需要一个网桥。

因此,我在本地 VirtualBox 托管的服务器上模拟了网络配置,在那里我能够使用网桥设置正在运行的网络配置。但我必须在 Virtual Box 设置中启用混杂模式。

如果我将设置移植到我的 dedicatet hetzner ubuntu 服务器,该服务器的互联网连接就会中断。

有人能给我一些建议吗?

下面是屏蔽的 netplan 配置,它没有运行(netplan generate && netplan apply 命令成功运行)。

默认工作网络配置:

network:
  version: 2
  renderer: networkd
  ethernets:
    enp2s0:
      addresses:
        - [IP4]
        - [IP6]
      routes:
        - on-link: true
          to: 0.0.0.0/0
          via: [another IP4]
      gateway6: fe80::1
      nameservers:
        addresses:
          - [another IP4]
          - [another IP4]
          - [another IP4]
          - [another IP6]
          - [another IP6]
          - [another IP6]

现在我的‘bridged-config’不起作用:

network:
  version: 2
  renderer: networkd
  ethernets:
    enp2s0:
      dhcp4: false
  bridges:
    br0:
      interfaces: [enp2s0]
      addresses:
        - [IP4]
        - [IP6]
      routes:
        - on-link: true
          to: 0.0.0.0/0
          via: [another IP4]
      gateway6: fe80::1
      nameservers:
        addresses:
          - [another IP4]
          - [another IP4]
          - [another IP4]
          - [another IP6]
          - [another IP6]
          - [another IP6]

应用配置后我有一些输出:

ifconfig:

br0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet [IP4]  netmask 255.255.255.255  broadcast 0.0.0.0
        inet6 [IP6]  prefixlen 64  scopeid 0x0<global>
        ether 06:54:dd:62:e6:af  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

docker0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 172.17.0.1  netmask 255.255.0.0  broadcast 172.17.255.255
        inet6 fe80::42:2bff:febd:df03  prefixlen 64  scopeid 0x20<link>
        ether 02:42:2b:bd:df:03  txqueuelen 0  (Ethernet)
        RX packets 17  bytes 760 (760.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 16  bytes 1088 (1.0 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp2s0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        ether 44:8a:5b:d4:4f:46  txqueuelen 1000  (Ethernet)
        RX packets 12143  bytes 1170508 (1.1 MB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 13113  bytes 2062454 (2.0 MB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 4076  bytes 773559 (773.5 KB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 4076  bytes 773559 (773.5 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

veth5932247: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet6 fe80::289c:28ff:fef6:93f0  prefixlen 64  scopeid 0x20<link>
        ether 2a:9c:28:f6:93:f0  txqueuelen 0  (Ethernet)
        RX packets 17  bytes 998 (998.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 20  bytes 1448 (1.4 KB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

virbr0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.122.1  netmask 255.255.255.0  broadcast 192.168.122.255
        ether 52:54:00:da:13:11  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

网络状态

Kernel Interface table
Iface      MTU    RX-OK RX-ERR RX-DRP RX-OVR    TX-OK TX-ERR TX-DRP TX-OVR Flg
br0       1500        0      0      0 0             0      0      0      0 BMU
docker0   1500       17      0      0 0            16      0      0      0 BMRU
enp2s0    1500    12143      0      0 0         13113      0      0      0 BMU
lo       65536     4092      0      0 0          4092      0      0      0 LRU
veth5932  1500       17      0      0 0            20      0      0      0 BMRU
virbr0    1500        0      0      0 0             0      0      0      0 BMU

ip r-应用桥之前:

default via [IP4] dev enp2s0 proto static onlink
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown

ip r-使用应用桥:

default via [IP4] dev br0 proto static onlink linkdown
172.17.0.0/16 dev docker0 proto kernel scope link src 172.17.0.1 linkdown
192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 linkdown

知识产权

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: enp2s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel master br0 state DOWN group default qlen 1000
    link/ether 44:8a:5b:d4:4f:46 brd ff:ff:ff:ff:ff:ff
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 52:54:00:da:13:11 brd ff:ff:ff:ff:ff:ff
    inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
       valid_lft forever preferred_lft forever
4: virbr0-nic: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel master virbr0 state DOWN group default qlen 1000
    link/ether 52:54:00:da:13:11 brd ff:ff:ff:ff:ff:ff
5: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
    link/ether 02:42:51:4d:d0:31 brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
    inet6 fe80::42:51ff:fe4d:d031/64 scope link
       valid_lft forever preferred_lft forever
7: vethecd1ee3@if6: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master docker0 state UP group default
    link/ether 9a:e0:6b:4c:5b:ae brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet6 fe80::98e0:6bff:fe4c:5bae/64 scope link
       valid_lft forever preferred_lft forever
14: br0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
    link/ether 06:54:dd:62:e6:af brd ff:ff:ff:ff:ff:ff
    inet [IP4]]/32 scope global br0
       valid_lft forever preferred_lft forever
    inet6 [IP6]/64 scope global
       valid_lft forever preferred_lft forever

netplan --debug 生成

** (generate:24019): DEBUG: 17:06:17.920: Processing input file /etc/netplan/01-netcfg.yaml..
** (generate:24019): DEBUG: 17:06:17.930: starting new processing pass
** (generate:24019): DEBUG: 17:06:17.930: We have some netdefs, pass them through a final round of validation
** (generate:24019): DEBUG: 17:06:17.930: enp2s0: setting default backend to 1
** (generate:24019): DEBUG: 17:06:17.930: Configuration is valid
** (generate:24019): DEBUG: 17:06:17.930: br0: setting default backend to 1
** (generate:24019): DEBUG: 17:06:17.930: Configuration is valid
** (generate:24019): DEBUG: 17:06:17.930: Generating output files..
** (generate:24019): DEBUG: 17:06:17.930: NetworkManager: definition enp2s0 is not for us (backend 1)
** (generate:24019): DEBUG: 17:06:17.930: NetworkManager: definition br0 is not for us (backend 1)

netplan——调试应用

DEBUG:command generate: running ['/lib/netplan/generate']
DEBUG:netplan generated networkd configuration changed, restarting networkd
DEBUG:no netplan generated NM configuration exists
DEBUG:enp2s0 not found in {}
DEBUG:br0 not found in {}
DEBUG:Merged config:
network:
  bonds: {}
  bridges:
    br0:
      addresses:
      - [IP4]]/32
      - [IP6]/64
      dhcp4: false
      dhcp6: false
      gateway6: fe80::1
      interfaces:
      - enp2s0
      nameservers:
        addresses:
        - [another IP4]
        - [another IP4]
        - [another IP4]
        - [another IP6]
        - [another IP6]
        - [another IP6]
      parameters:
        forward-delay: 4
        stp: true
      routes:
      - on-link: true
        to: 0.0.0.0/0
        via: [another IP4]
  ethernets:
    enp2s0:
      dhcp4: false
      dhcp6: false
  vlans: {}
  wifis: {}

DEBUG:Skipping non-physical interface: lo
DEBUG:Skipping composite member enp2s0
DEBUG:Skipping non-physical interface: virbr0
DEBUG:Skipping non-physical interface: virbr0-nic
DEBUG:Skipping non-physical interface: docker0
DEBUG:Skipping non-physical interface: vethecd1ee3
DEBUG:{}
DEBUG:netplan triggering .link rules for lo
DEBUG:netplan triggering .link rules for enp2s0
DEBUG:netplan triggering .link rules for virbr0
DEBUG:netplan triggering .link rules for virbr0-nic
DEBUG:netplan triggering .link rules for docker0
DEBUG:netplan triggering .link rules for vethecd1ee3

不幸的是这篇文章不能解决我的问题:https://stackoverflow.com/a/61910941/9601604

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