[Bug 1817655] [NEW] NetworkManager renderer broken on NM version 1.15.2 or later (Ubuntu 19.04 Disco)

[Trent Lloyd]

Public bug reported:

NetworkManager 1.15.2 or later (as included first in Ubuntu 19.04 Disco Dingo) now requires that files in /{etc,run}/NetworkManager/system-connections end in the suffix '.nmconnection' as per the following commit:
https://github.com/NetworkManager/NetworkManager/commit/648c256b9014198aac388097e410999c68c4b452

NetPlan writes files as /run/NetworkManager/system-connections/{name}
without any suffix. On Ubuntu 19.04 these files are ignored and the
configuration is not applied.

If you rename the files to end in '.nmconnection' then you can see the
interface configuration loaded by NetworkManager.


root at optane:/run/NetworkManager/system-connections# ls
 netplan-eno1   virbr0.nmconnection  'Wired connection 1.nmconnection'  'Wired connection 2.nmconnection'

root at optane:/run/NetworkManager/system-connections# cat /etc/netplan/03-netcfg.yaml 
# This file describes the network interfaces available on your system
# For more information, see netplan(5).
network:
  version: 2
  renderer: NetworkManager
  ethernets:
    eno1:
      addresses: [10.48.134.22/25]
      gateway4: 10.48.134.1
      nameservers:
        addresses: [10.48.134.6]

** Affects: netplan
     Importance: Undecided
         Status: New

** Affects: netplan.io (Ubuntu)
     Importance: High
         Status: New

** Also affects: netplan.io (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: netplan.io (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1817655

Title:
  NetworkManager renderer broken on NM version 1.15.2 or later (Ubuntu
  19.04 Disco)

Status in netplan:
  New
Status in netplan.io package in Ubuntu:
  New

Bug description:
  NetworkManager 1.15.2 or later (as included first in Ubuntu 19.04 Disco Dingo) now requires that files in /{etc,run}/NetworkManager/system-connections end in the suffix '.nmconnection' as per the following commit:
  https://github.com/NetworkManager/NetworkManager/commit/648c256b9014198aac388097e410999c68c4b452

  NetPlan writes files as /run/NetworkManager/system-connections/{name}
  without any suffix. On Ubuntu 19.04 these files are ignored and the
  configuration is not applied.

  If you rename the files to end in '.nmconnection' then you can see the
  interface configuration loaded by NetworkManager.

  
  root at optane:/run/NetworkManager/system-connections# ls
   netplan-eno1   virbr0.nmconnection  'Wired connection 1.nmconnection'  'Wired connection 2.nmconnection'

  root at optane:/run/NetworkManager/system-connections# cat /etc/netplan/03-netcfg.yaml 
  # This file describes the network interfaces available on your system
  # For more information, see netplan(5).
  network:
    version: 2
    renderer: NetworkManager
    ethernets:
      eno1:
        addresses: [10.48.134.22/25]
        gateway4: 10.48.134.1
        nameservers:
          addresses: [10.48.134.6]

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