[Bug 2060311] Re: Setting "optional: true" to overcome he timeout "Job systemd-networkd-wait-online" does no longer work with latest noble image

[Ubuntu QA Website]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/2060311

** Tags added: iso-testing

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https://bugs.launchpad.net/bugs/2060311

Title:
  Setting "optional: true" to overcome he timeout "Job systemd-networkd-
  wait-online" does no longer work with latest noble image

Status in Netplan:
  New
Status in Ubuntu on IBM z Systems:
  New
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  Especially on s390x (but not limited to s390x) it's often the case that a system has network devices that are not necessarily connected during boot-up and one gets such a 2 min timeout:
  "Job systemd-networkd-wait-online. Start running (1min 59s / no limit)"

  In the past I could avoid that by setting "optional: true" post-install (no perfect, but worked),
  but this does no longer seem to work using the latest noble ISO image (Apr 5th).

  Setting 'optional: true' in /etc/netplan/50-cloud-init.yaml looks like
  this for me:

  # This file is generated from information provided by the datasource.  Changes
  # to it will not persist across an instance reboot.  To disable cloud-init's
  # network configuration capabilities, write a file
  # /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
  # network: {config: disabled}
  network:
      ethernets:
          enP1p0s0:
              optional: true
              dhcp4: true
          enP1p0s0d1:
              optional: true
              dhcp4: true
          enP2p0s0:
              optional: true
              dhcp4: true
          enP2p0s0d1:
              optional: true
              dhcp4: true
          encc000: {}
      version: 2
      vlans:
          encc000.2653:
              addresses:
              - 10.11.12.15/24
              gateway4: 10.11.12.1
              id: 2653
              link: encc000
              nameservers:
                  addresses:
                  - 10.11.12.1

  ... can be set fine (also --dry-run does not moan, except about
  dhcp4).

  This worked in the past on noble, but also on older Ubuntu releases
  like jammy.

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