[Bug 1618522] Re: netplan does not generates .network files just for ethernet

[Martin Pitt]

One way to improve that in userspace would be to at least allow a way to
match on "no devtype" in networkd. You cannot currently say Type="" or
similar.

Lennart Poettering> hmm, for networkctl we patch that to make this more useful to look at
Lennart Poettering> shouldn'we just do the same in networkd
Lennart Poettering> i.e. accept our fate?
Lennart Poettering> i am pretty sure "networkctl" should show in the Type column precisely the types you can [Match] on, no?
Tom Gundersen> yeah, i guess we can just do that

** Also affects: systemd (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: systemd (Ubuntu)
   Importance: Undecided => Low

** Changed in: systemd (Ubuntu)
       Status: New => Triaged

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https://bugs.launchpad.net/bugs/1618522

Title:
  netplan does not generates .network files just for ethernet

Status in nplan package in Ubuntu:
  Triaged
Status in systemd package in Ubuntu:
  Triaged

Bug description:
  On my pi3 I have an image with the ubuntu-core snap rev 354 and I get
  the following netplan configuration file after the first boot:

  ubuntu at localhost:~$ cat /etc/netplan/00-initial-config.yaml
  network:
   version: 2
   ethernets:
     all:
      match:
       name: "*"
      dhcp4: true

  This generates the following .networkd file

  ubuntu at localhost:~$ cat /run/systemd/network/10-netplan-all.network
  [Match]
  Name=*

  [Network]
  DHCP=ipv4

  If I look now at the output of networkctl I see it also tries to
  manage my mlan0 device which is a WiFi one and should be managed
  according to the netplan rule:

  ubuntu at localhost:~$ networkctl
  IDX LINK             TYPE               OPERATIONAL SETUP
    1 lo               loopback           carrier     configured
    5 eth1             ether              no-carrier  configuring
    6 eth0             ether              routable    configured
    7 mlan0            wlan               no-carrier  configuring

  In summary, the networkd generator inside netplan currently does not
  limit the generated .network file to tell networkd to only look at
  ethernet devices but rather tell it to control every device available
  on the system.

  Expectation: Specifying a wildcard rule in a netplan configuration
  file for ethernet devices should tell the configured networking system
  to only consider ethernet devices and nothing else.

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