[Bug 2074266] [NEW] 24.04: latest netplan updates fail to apply already working config

[Martin Hofbauer]

Public bug reported:

Using Ubuntu Server 24.04 LTS
After upgrading my packages, including Netplan (using "apt dist-upgrade") and rebooting, network configuration (netplan yaml file)  was no longer applied to the server.

I noticed some changes related to file/directory permissions in
/etc/netplan, but changed them to stop showing warnings.

I'm talking about the new versions 1.0-2ubuntu1.1 and/or 1.0-2ubuntu1.2 (both came out within 3 days, so I don't know which of the two is responsible for the relevant changes)
But only a rollback to the 4 "netplan"-packages(libnetplan1 netplan.io netplan-generator  python3-netplan) from LTS version 1.0-2ubuntu1 "solved" the problem. My configuration is applied again on boot.

My config:

network:
    version: 2
    renderer: networkd
    ethernets:
        enp4s0:
            dhcp4: false
        enp6s0:
            dhcp4: false
        enp9s0:
            dhcp4: false
            addresses:
                - "172.30.30.1/24"
            nameservers:
                addresses:
                    - 10.21.21.21
        enp3s0f0:
            dhcp4: false
        enp3s0f1:
            dhcp4: false

root at server:/etc/netplan# ls -al
total 58
drwxr-xr-x  2 root root   10 Jul 27 17:19 .
drwxr-xr-x 94 root root  186 Jul 27 17:30 ..
-rw-------  1 root root  502 Jul 26 01:20 01-netcfg.yaml

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: netplan.io 1.0-2ubuntu1
ProcVersionSignature: Ubuntu 6.8.0-39.39-generic 6.8.8
Uname: Linux 6.8.0-39-generic x86_64
NonfreeKernelModules: zfs
ApportVersion: 2.28.1-0ubuntu3
Architecture: amd64
CasperMD5CheckResult: unknown
Date: Sat Jul 27 17:31:46 2024
ProcEnviron:
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=linux
 XDG_RUNTIME_DIR=<set>
SourcePackage: netplan.io
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug netplan noble

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https://bugs.launchpad.net/bugs/2074266

Title:
  24.04: latest netplan updates  fail to apply already working config

Status in netplan.io package in Ubuntu:
  New

Bug description:
  Using Ubuntu Server 24.04 LTS
  After upgrading my packages, including Netplan (using "apt dist-upgrade") and rebooting, network configuration (netplan yaml file)  was no longer applied to the server.

  I noticed some changes related to file/directory permissions in
  /etc/netplan, but changed them to stop showing warnings.

  I'm talking about the new versions 1.0-2ubuntu1.1 and/or 1.0-2ubuntu1.2 (both came out within 3 days, so I don't know which of the two is responsible for the relevant changes)
  But only a rollback to the 4 "netplan"-packages(libnetplan1 netplan.io netplan-generator  python3-netplan) from LTS version 1.0-2ubuntu1 "solved" the problem. My configuration is applied again on boot.

  My config:

  network:
      version: 2
      renderer: networkd
      ethernets:
          enp4s0:
              dhcp4: false
          enp6s0:
              dhcp4: false
          enp9s0:
              dhcp4: false
              addresses:
                  - "172.30.30.1/24"
              nameservers:
                  addresses:
                      - 10.21.21.21
          enp3s0f0:
              dhcp4: false
          enp3s0f1:
              dhcp4: false

  root at server:/etc/netplan# ls -al
  total 58
  drwxr-xr-x  2 root root   10 Jul 27 17:19 .
  drwxr-xr-x 94 root root  186 Jul 27 17:30 ..
  -rw-------  1 root root  502 Jul 26 01:20 01-netcfg.yaml

  ProblemType: Bug
  DistroRelease: Ubuntu 24.04
  Package: netplan.io 1.0-2ubuntu1
  ProcVersionSignature: Ubuntu 6.8.0-39.39-generic 6.8.8
  Uname: Linux 6.8.0-39-generic x86_64
  NonfreeKernelModules: zfs
  ApportVersion: 2.28.1-0ubuntu3
  Architecture: amd64
  CasperMD5CheckResult: unknown
  Date: Sat Jul 27 17:31:46 2024
  ProcEnviron:
   PATH=(custom, no user)
   SHELL=/bin/bash
   TERM=linux
   XDG_RUNTIME_DIR=<set>
  SourcePackage: netplan.io
  UpgradeStatus: No upgrade log present (probably fresh install)

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