解释

Question

我很确定您的错误是由于 NetworkManager 特定代码中的错误造成的netplan apply。

为了修复该错误，我编写了一个简单的补丁，您可以通过将整个块粘贴到终端中来应用它：

sudo patch /usr/share/netplan/netplan/cli/commands/apply.py << EOF
--- /usr/share/netplan/netplan/cli/commands/apply.original.py
+++ /usr/share/netplan/netplan/cli/commands/apply.py
@@ -99,11 +99,14 @@
         # if the interface is up, we can still apply some .link file changes
         for device in devices:
             logging.debug('netplan triggering .link rules for %s', device)
-            subprocess.check_call(['udevadm', 'test-builtin',
-                                   'net_setup_link',
-                                   '/sys/class/net/' + device],
-                                  stdout=subprocess.DEVNULL,
-                                  stderr=subprocess.DEVNULL)
+            try:
+                subprocess.check_call(['udevadm', 'test-builtin',
+                                       'net_setup_link',
+                                       '/sys/class/net/' + device],
+                                      stdout=subprocess.DEVNULL,
+                                      stderr=subprocess.DEVNULL)
+            except subprocess.CalledProcessError:
+                logging.debug('Ignoring device without syspath: %s', device)

         # apply renames to "down" devices
         for iface, settings in changes.items():
EOF

一旦完成了这些，你的sudo netplan --debug apply命令应该每次运行都成功，而不是每次运行都成功。

请注意，这是一个临时修复如果更新，则将撤消此操作netplan.io。如需永久修复，请按照启动板错误 #1810043。

解释

当使用 NetworkManager 渲染器时，中的逻辑NetplanApply.command_apply()告诉nmcli断开先前填充的设备netifaces.interfaces()：

# restarting NM does not cause new config to be applied, need to shut down devices first
for device in devices:
    # ignore failures here -- some/many devices might not be managed by NM
    try:
        utils.nmcli(['device', 'disconnect', device])
    except subprocess.CalledProcessError:
        pass

utils.systemctl_network_manager('stop', sync=sync)

这意味着，devices之前设置的变量devices = netifaces.interfaces()可能会因运行后更多设备而过时，而实际存在的设备却不够用nmcli device disconnect。

补丁程序通过容忍丢失的设备或设备别名（不会显示在中/sys/class/net/）来修复此错误，nmcli device disconnect以便即将推出的设备udevadm test-builtin net_setup_link /sys/class/net/XXX可以与剩余的设备一起使用：

for device in devices:
    logging.debug('netplan triggering .link rules for %s', device)
    subprocess.check_call(['udevadm', 'test-builtin',
                           'net_setup_link',
                           '/sys/class/net/' + device],
                          stdout=subprocess.DEVNULL,
                          stderr=subprocess.DEVNULL)

我请求将补丁合并到CanonicalLtd/netplan#86。

Answer 1