在 Ubuntu 18.04 LTS 上遇到了一些重大的网络问题。全新安装。我在安装过程中设置了一个静态 IP，这个 IP 工作了几天，并且在多次重启后仍然保持设置状态。现在界面没有显示 IP。似乎当我设置该 IP 时，它确实生成了一个看似正确的 netplan，但是 netplan apply 什么也没做。
我之前安装时也遇到过这种情况。我当时一直在摆弄 DNS 东西，所以我想我这次只需重新映像机器，不触碰任何网络实用程序，但我仍然遇到这个问题。
问题在安装后大约一天半随机出现。问题出现时我还没有使用机器，到目前为止，我在安装过程中所做的唯一一件事就是设置了几个带有 samba 和 SFTP 的 docker 容器。
编辑：我放弃了默认的 netplan，并按照教程创建了这个，但仍然没有成功。
我的 50-cloud-init.yaml 的内容
# This file is generated from information provided by
# the datasource. Changes to it will not persist across an instance.
# 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
renderer: networkd
ethernets:
enp0s25:
dhcp4: no
addresses: [192.168.0.32/24]
gateway4: 192.168.0.1
nameservers:
addresses: [1.1.1.1,8.8.8.8]
netplan --debug apply 的终端输出
** (generate:2227): DEBUG: 23:11:19.520: Processing input file /etc/netplan/50-cloud-init.yaml..
** (generate:2227): DEBUG: 23:11:19.520: starting new processing pass
** (generate:2227): DEBUG: 23:11:19.520: enp0s25: setting default backend to 1
** (generate:2227): DEBUG: 23:11:19.520: Generating output files..
** (generate:2227): DEBUG: 23:11:19.520: NetworkManager: definition enp0s25 is not for us (backend 1)
DEBUG:netplan generated networkd configuration exists, restarting networkd
DEBUG:no netplan generated NM configuration exists
DEBUG:enp0s25 not found in {}
DEBUG:Merged config:
network:
bonds: {}
bridges: {}
ethernets:
enp0s25:
addresses:
- 192.168.0.32/24
dhcp4: false
gateway4: 192.168.0.1
nameservers:
addresses:
- 1.1.1.1
- 8.8.8.8
vlans: {}
wifis: {}
DEBUG:Skipping non-physical interface: lo
DEBUG:Skipping non-physical interface: docker0
DEBUG:Skipping non-physical interface: br-98e8ea9c70cb
DEBUG:{}
DEBUG:netplan triggering .link rules for lo
DEBUG:netplan triggering .link rules for enp0s25
DEBUG:netplan triggering .link rules for docker0
DEBUG:netplan triggering .link rules for br-98e8ea9c70cb
应用此 netplan 后我的 ifconfig：
br-98e8ea9c70cb: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.18.0.1 netmask 255.255.0.0 broadcast 172.18.255.255
ether 02:42:51:a6:a3:66 txqueuelen 0 (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=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:d5:d6:46:8e txqueuelen 0 (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
enp0s25: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 00:24:7e:00:e0:30 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
device interrupt 16 memory 0xfc500000-fc520000
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 7926 bytes 592108 (592.1 KB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 7926 bytes 592108 (592.1 KB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0