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[James Falcon <1961355@xxxxxxxxxxxxxxxxxx>]

Tracked in Github Issues as https://github.com/canonical/cloud-
init/issues/3950

** Bug watch added: github.com/canonical/cloud-init/issues #3950
   https://github.com/canonical/cloud-init/issues/3950

** Changed in: cloud-init
       Status: Triaged => Expired

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https://bugs.launchpad.net/bugs/1961355

Title:
  cloud init failed to set up link for lo

Status in cloud-init:
  Expired

Bug description:
  A error message was found in '/var/lib/cloud/data/result.json' when booting a Ubuntu20.04 server.
  Using cloud-init 18.5
  ERROR INFO:
  -------------ERROR INFO--------
  cat /var/lib/cloud/data/result.json
  {
   "v1": {
    "datasource": "DataSourceConfigDrive [net,ver=2][source=/dev/vdb]",
    "errors": [
     "Unexpected error while running command.\nCommand: ['udevadm', 'test-builtin', 'net_setup_link', '/sys/class/net/lo']\nExit code: 1\nReason: -\nStdout: \nStderr: Load module index\n        Network interface NamePolicy= disabled on kernel command line, ignoring.\n        Skipping empty file: /etc/systemd/network/99-default.link\n        Parsed configuration file /usr/lib/systemd/network/73-usb-net-by-mac.link\n        Parsed configuration file /run/systemd/network/10-netplan-eth0.link\n        Created link configuration context.\n        Builtin command 'net_setup_link' fails: No such file or directory\n        Unload module index\n        Unloaded link configuration context."
    ]
   }
  }

  
  cloudinit.util.ProcessExecutionError: Unexpected error while running command.
  Command: ['udevadm', 'test-builtin', 'net_setup_link', '/sys/class/net/lo']
  Exit code: 1
  Reason: -
  Stdout: 
  Stderr: Load module index
          Network interface NamePolicy= disabled on kernel command line, ignoring.
          Skipping empty file: /etc/systemd/network/99-default.link
          Parsed configuration file /usr/lib/systemd/network/73-usb-net-by-mac.link
          Parsed configuration file /run/systemd/network/10-netplan-eth0.link
          Created link configuration context.
          Builtin command 'net_setup_link' fails: No such file or directory
          Unload module index
          Unloaded link configuration context.
  -------------------------------

  
  -------------OS info-----------
  # cat /etc/os-release 
  NAME="Ubuntu"
  VERSION="20.04.1 LTS (Focal Fossa)"
  ID=ubuntu
  ID_LIKE=debian
  PRETTY_NAME="Ubuntu 20.04.1 LTS"
  VERSION_ID="20.04"
  HOME_URL="https://www.ubuntu.com/";
  SUPPORT_URL="https://help.ubuntu.com/";
  BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/";
  PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy";
  VERSION_CODENAME=focal
  UBUNTU_CODENAME=focal
  -------------------------------
  --------systemd version -------
  root@ecs-systemd-zjs:~# dpkg -l | grep systemd
  ii  dbus-user-session                    1.12.16-2ubuntu2.1                amd64        simple interprocess messaging system (systemd --user integration)
  ii  libnss-systemd:amd64                 245.4-4ubuntu3.14                 amd64        nss module providing dynamic user and group name resolution
  ii  libpam-systemd:amd64                 245.4-4ubuntu3.14                 amd64        system and service manager - PAM module
  ii  libsystemd-dev:amd64                 245.4-4ubuntu3.14                 amd64        systemd utility library - development files
  ii  libsystemd0:amd64                    245.4-4ubuntu3.14                 amd64        systemd utility library
  ii  networkd-dispatcher                  2.0.1-1                           all          Dispatcher service for systemd-networkd connection status changes
  ii  systemd                              245.4-4ubuntu3.14                 amd64        system and service manager
  ii  systemd-sysv                         245.4-4ubuntu3.14                 amd64        system and service manager - SysV links
  rc  systemd-timesyncd                    245.4-4ubuntu3.14                 amd64        minimalistic service to synchronize local time with NTP servers
  -------------------------------

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