[Bug 1731600] Re: [bionic] Installing desktop from mini.iso results in ambiguous configuration

[Mathieu Trudel-Lapierre]

Nice catch. This is a bug in netcfg, reassigning.

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

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

** Changed in: netcfg (Ubuntu)
   Importance: Undecided => High

** Changed in: netcfg (Ubuntu)
     Assignee: (unassigned) => Mathieu Trudel-Lapierre (cyphermox)

** No longer affects: netplan

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https://bugs.launchpad.net/bugs/1731600

Title:
  [bionic] Installing desktop from mini.iso results in ambiguous
  configuration

Status in netcfg package in Ubuntu:
  Triaged

Bug description:
  Not sure where to put this bug, but I'll start here (apologies). I'm
  not actually sure if it's a bug or intended behavior, but if it's
  intended, it would be nice if the files the installer places down
  include better comments (or simply delete the no-longer-relevant
  file).

  I installed Bionic using mini.iso and selected Ubuntu Desktop.

  It seems that two Netplan configurations are generated; it's not clear
  if this is correct, and it's not clear which configuration takes
  precedence. It looks like NetworkManager eventually took control of
  the interface, as seen below:

  
  mpontillo at bionic:/etc/netplan$ ls -l
  total 8
  -rw-r--r-- 1 root root 194 Nov 10 19:25 01-netcfg.yaml
  -rw-r--r-- 1 root root 104 Nov 10 19:36 01-network-manager-all.yaml

  mpontillo at bionic:/etc/netplan$ cat *
  # This file describes the network interfaces available on your system
  # For more information, see netplan(5).
  network:
    version: 2
    renderer: networkd
    ethernets:
      ens33:
        dhcp4: yes
  # Let NetworkManager manage all devices on this system
  network:
    version: 2
    renderer: NetworkManager

  mpontillo at bionic:~$ nmcli
  ens33: connected to netplan-ens33
  	"Intel 82545EM Gigabit Ethernet Controller (Copper) (PRO/1000 MT Single Port Adapter)"
  	ethernet (e1000), 00:0C:29:90:B1:90, hw, mtu 1500
  	ip4 default
  	inet4 172.16.230.129/24
  	route4 169.254.0.0/16
  	inet6 fe80::20c:29ff:fe90:b190/64

  lo: unmanaged
  	"lo"
  	loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536

  DNS configuration:
  	servers: 172.16.230.2
  	domains: localdomain
  	interface: ens33

  ...

  mpontillo at bionic:~$ networkctl
  WARNING: systemd-networkd is not running, output will be incomplete.

  IDX LINK             TYPE               OPERATIONAL SETUP
    1 lo               loopback           n/a         unmanaged
    2 ens33            ether              n/a         unmanaged

  2 links listed.

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