[Bug 2041727] Re: "netplan apply" produces ovsdb-server.service WARNING even when openvswitch-switch not installed

[Dexuan Cui]

I hit the same bug today. Thanks Brian for proposing the fix, which
works for me.

** Also affects: netplan
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/2041727

Title:
  "netplan apply" produces ovsdb-server.service WARNING even when
  openvswitch-switch not installed

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

Bug description:
  Example:

  bfinley at flashmq2:~$ sudo netplan apply
  WARNING:root:Cannot call Open vSwitch: ovsdb-server.service is not running.

  bfinley at flashmq2:~$ apt-file search ovsdb-server.service
  openvswitch-switch: /lib/systemd/system/ovsdb-server.service

  bfinley at flashmq2:~$ dpkg -l openvswitch-switch
  Desired=Unknown/Install/Remove/Purge/Hold
  | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
  |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
  ||/ Name               Version      Architecture Description
  +++-==================-============-============-=================================
  un  openvswitch-switch <none>       <none>       (no description available)

  
  Possible resolution:

  If the package isn't installed, there's no reason to warn that a non-
  existent service can't be restarted.

  Therefore, in "/usr/share/netplan/netplan/cli/commands/apply.py", on
  line 417 (as of this version), include a test for the existence of
  ovsdb-server.service before warning about it.

  Here's a patch that does just that:

  bfinley at flashmq1:/usr/share/netplan/netplan$ diff -urN cli/commands/apply.py.orig cli/commands/apply.py
  --- cli/commands/apply.py.orig  2023-10-28 17:18:39.690507475 +0000
  +++ cli/commands/apply.py       2023-10-28 17:25:23.940383821 +0000
  @@ -414,4 +414,5 @@
               if exit_on_error:
                   sys.exit(1)
           except OvsDbServerNotRunning as e:
  -            logging.warning('Cannot call Open vSwitch: {}.'.format(e))
  +            if utils.systemctl_is_active('ovsdb-server.service'):
  +                logging.warning('Cannot call Open vSwitch: {}.'.format(e))

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: netplan.io 0.106.1-7ubuntu0.22.04.2
  ProcVersionSignature: Ubuntu 5.15.0-87.97-generic 5.15.122
  Uname: Linux 5.15.0-87-generic x86_64
  ApportVersion: 2.20.11-0ubuntu82.5
  Architecture: amd64
  CasperMD5CheckResult: pass
  CloudArchitecture: x86_64
  CloudID: none
  CloudName: none
  CloudPlatform: none
  CloudSubPlatform: config
  Date: Sat Oct 28 16:54:18 2023
  InstallationDate: Installed on 2023-10-24 (4 days ago)
  InstallationMedia: Ubuntu-Server 22.04.3 LTS "Jammy Jellyfish" - Release amd64 (20230810)
  ProcEnviron:
   TERM=tmux-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: netplan.io
  UpgradeStatus: No upgrade log present (probably fresh install)

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