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[Bug Watch Updater <2103903@xxxxxxxxxxxxxxxxxx>]

** Changed in: cloud-init
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/2103903

Title:
  Deployment fails when using interface with OVS bridge

Status in cloud-init:
  Fix Released
Status in MAAS:
  Fix Committed
Status in MAAS 3.5 series:
  Fix Committed
Status in MAAS 3.6 series:
  In Progress

Bug description:
  Describe the bug:
  When trying to deploy a 24.04 Ubuntu node with OVS bridge configured on the interface as primary network, deployment will fail over cloud-init error ("cannot apply final stage").

  Notes:
  Commissioning of the node is ok.
  Deploying the same node with linux bridge instead of OVS is ok.
  Deploying 22.04 with OVS is ok.
  It was working for us with 24.04 as well, however at some point is stopped working.

  Steps to reproduce:
  1. Commission a node
  2. Configure node network to have OVS bridge on the primary interface (MAAS-provided, static IP)
  3. Deploy node with cloud-init for adding a user and additional configuration (attached)
  4. Node will start PXE-based deployment and will re-start the node to boot from local disk, then it will fail with network configuration error

  Expected behavior (what should have happened?):
  Node deployment with OVS networking should be completed with no errors.

  Actual behavior (what actually happened?):
  Node deployment is not completed, cloud-init is not applied.

  MAAS version and installation type (deb, snap):
  # snap list maas
  Name  Version                  Rev    Tracking    Publisher   Notes
  maas  3.5.4-16349-g.4dbbed5f4  38907  3.5/stable  canonical?

  # apt list maas
  Listing... Done

  MAAS setup (HA, single node, multiple regions/racks):
  single node

  Host OS distro and version:

  # cat /etc/lsb-release
  DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=24.04
  DISTRIB_CODENAME=noble
  DISTRIB_DESCRIPTION="Ubuntu 24.04.2 LTS"

  Additional context:

  - cloud-init:

  #cloud-config
  system_info:
    default_user:
      name: depuser
      passwd: "$6$jOKPZPHD9...0kn/"
      lock_passwd: false
      groups: [adm, audio, cdrom, dialout, dip, floppy, lxd, netdev, plugdev, sudo, video]
      sudo: ["ALL=(ALL) NOPASSWD:ALL"]
      shell: /bin/bash
  ssh_pwauth: True
  package_upgrade: true
  runcmd:
      - apt-get update
      - apt-get -y install nfs-common openvswitch-switch
      - |
        UPLINK_MAC=$(cat /sys/class/net/enp1s0/address)
        ovs-vsctl set Bridge brenp1s0 other-config:hwaddr=$UPLINK_MAC
        ovs-vsctl br-set-external-id brenp1s0 bridge-id brenp1s0 -- br-set-external-id brenp1s0 bridge-uplink enp1s0

  Attached:
  - screenshots of network interface configuration with ovs
  - journalctl logs attached (machine name test-master-ovs)

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