netplan overwrites yml file

[r0mulux]

Considering these 3 netplan commands:

sudo netplan set ethernets.enp0s8.dhcp4=false
sudo netplan set bridges.mybridge.dhcp4=false
sudo netplan set bridges.mybridge.interfaces=[enp0s8]

With netplan 0.104-0ubuntu2, it creates a file /etc/netplan/70-netplan-set.yaml containing:

network:
  bridges:
    mybridge:
      dhcp4: false
      interfaces:
      - enp0s8
  ethernets:
    enp0s8:
      dhcp4: false
  version: 2

With netplan 0.105-0ubuntu2~22.04.1, it creates a file containing:

network:
  version: 2
  bridges:
    mybridge:
      dhcp4: false

and last command produce output error:

(process:1941): GLib-GIO-CRITICAL **: 15:35:18.738: g_file_new_for_path: assertion 'path != NULL' failed

(process:1941): GLib-GIO-CRITICAL **: 15:35:18.739: g_file_read: assertion 'G_IS_FILE (file)' failed

(process:1941): GLib-GIO-CRITICAL **: 15:35:18.739: g_data_input_stream_new: assertion 'G_IS_INPUT_STREAM (base_stream)' failed

(process:1941): GLib-GObject-CRITICAL **: 15:35:18.739: g_object_unref: assertion 'G_IS_OBJECT (object)' failed

(process:1941): GLib-GIO-CRITICAL **: 15:35:18.740: g_data_input_stream_read_line: assertion 'G_IS_DATA_INPUT_STREAM (stream)' failed

(process:1941): GLib-GIO-CRITICAL **: 15:35:18.740: g_data_input_stream_read_line: assertion 'G_IS_DATA_INPUT_STREAM (stream)' failed

(process:1941): GLib-GIO-CRITICAL **: 15:35:18.740: g_data_input_stream_read_line: assertion 'G_IS_DATA_INPUT_STREAM (stream)' failed

(process:1941): GLib-GIO-CRITICAL **: 15:35:18.740: g_data_input_stream_read_line: assertion 'G_IS_DATA_INPUT_STREAM (stream)' failed

(process:1941): GLib-GIO-CRITICAL **: 15:35:18.741: g_data_input_stream_read_line: assertion 'G_IS_DATA_INPUT_STREAM (stream)' failed

(process:1941): GLib-GObject-CRITICAL **: 15:35:18.741: g_object_unref: assertion 'G_IS_OBJECT (object)' failed

(process:1941): GLib-GObject-CRITICAL **: 15:35:18.741: g_object_unref: assertion 'G_IS_OBJECT (object)' failed
Traceback (most recent call last):
  File "/usr/sbin/netplan", line 23, in <module>
    netplan.main()
  File "/usr/share/netplan/netplan/cli/core.py", line 50, in main
    self.run_command()
  File "/usr/share/netplan/netplan/cli/utils.py", line 231, in run_command
    self.func()
  File "/usr/share/netplan/netplan/cli/commands/set.py", line 50, in run
    self.run_command()
  File "/usr/share/netplan/netplan/cli/utils.py", line 231, in run_command
    self.func()
  File "/usr/share/netplan/netplan/cli/commands/set.py", line 78, in command_set
    parser.load_yaml(tmp)
  File "/usr/share/netplan/netplan/libnetplan.py", line 115, in load_yaml
    _checked_lib_call(lib.netplan_parser_load_yaml_from_fd, self._ptr, input_file.fileno())
  File "/usr/share/netplan/netplan/libnetplan.py", line 79, in _checked_lib_call
    raise LibNetplanException(err.contents.message.decode('utf-8'))
netplan.libnetplan.LibNetplanException: (null):5:9: Error in network definition: mybridge: interface 'enp0s8' is not defined
(null)

[Lukas Märdian (slyon)]

Thank you for reporting this! I think this is related to the "netplan set" regression we're seeing in bug #1997467