[Bug 1903300] Re: systemd-networkd silently fails to set vxlan multicast group

[Dan Streetman]

** Description changed:

+ [impact]
+ 
+ setting VXLAN.Group does not correctly configure multicast group
+ 
+ [test case]
+ 
+ taken from upstream bug, example networkd config:
+ 
+ [NetDev]
+ Kind=vxlan
+ Name=myvx
+ 
+ [VXLAN]
+ VNI=1
+ Group=ff02::42:1
+ DestinationPort=8472
+ 
+ After restarting systemd-networkd the VXLAN device is created, but the
+ group address is not assigned. Use ip -d link show myvx and networkctl
+ show myvx to verify.
+ 
+ [regression potential]
+ 
+ any regression would likely cause problems only with VXLAN netdevs
+ created by networkd.
+ 
+ [scope]
+ 
+ this is needed only for f.
+ 
+ this was introduced by upstream commit 83cb24ac20b which was first in
+ v243, so this bug does not exist in b and earlier.
+ 
+ this was fixed by upstream commit
+ 7c9b26900cc33daf080627daf5904de74c1ef267 (and two following commits)
+ which were first included in v246, so this is already fixed in g and
+ later.
+ 
+ [original description]
+ 
+ 
  Fixed upstream, please include [1].
  
  Thank you.
- 
  
  [1] https://github.com/systemd/systemd/pull/15397
  
  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: systemd 245.4-4ubuntu3.3
  ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
  Uname: Linux 5.4.0-52-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.11
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Fri Nov  6 14:16:19 2020
  MachineType: QEMU Standard PC (Q35 + ICH9, 2009)
  ProcEnviron:
-  TERM=xterm-256color
-  PATH=(custom, no user)
-  LANG=C.UTF-8
-  SHELL=/bin/bash
+  TERM=xterm-256color
+  PATH=(custom, no user)
+  LANG=C.UTF-8
+  SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-52-generic root=UUID=97786d27-c04a-4592-a087-f19a689468a9 ro console=tty1 console=ttyS0
  SourcePackage: systemd
  UpgradeStatus: Upgraded to focal on 2020-08-27 (70 days ago)
  dmi.bios.date: 04/01/2014
  dmi.bios.vendor: SeaBIOS
  dmi.bios.version: rel-1.13.0-48-gd9c812dda519-prebuilt.qemu.org
  dmi.chassis.type: 1
  dmi.chassis.vendor: QEMU
  dmi.chassis.version: pc-q35-5.1
  dmi.modalias: dmi:bvnSeaBIOS:bvrrel-1.13.0-48-gd9c812dda519-prebuilt.qemu.org:bd04/01/2014:svnQEMU:pnStandardPC(Q35+ICH9,2009):pvrpc-q35-5.1:cvnQEMU:ct1:cvrpc-q35-5.1:
  dmi.product.name: Standard PC (Q35 + ICH9, 2009)
  dmi.product.version: pc-q35-5.1
  dmi.sys.vendor: QEMU

** Also affects: systemd (Ubuntu Focal)
   Importance: Undecided
       Status: New

** Changed in: systemd (Ubuntu)
       Status: New => Fix Released

** Changed in: systemd (Ubuntu Focal)
       Status: New => In Progress

** Changed in: systemd (Ubuntu Focal)
   Importance: Undecided => Medium

** Changed in: systemd (Ubuntu Focal)
     Assignee: (unassigned) => Dan Streetman (ddstreet)

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https://bugs.launchpad.net/bugs/1903300

Title:
  systemd-networkd silently fails to set vxlan multicast group

Status in systemd:
  Fix Released
Status in systemd package in Ubuntu:
  Fix Released
Status in systemd source package in Focal:
  In Progress

Bug description:
  [impact]

  setting VXLAN.Group does not correctly configure multicast group

  [test case]

  taken from upstream bug, example networkd config:

  [NetDev]
  Kind=vxlan
  Name=myvx

  [VXLAN]
  VNI=1
  Group=ff02::42:1
  DestinationPort=8472

  After restarting systemd-networkd the VXLAN device is created, but the
  group address is not assigned. Use ip -d link show myvx and networkctl
  show myvx to verify.

  [regression potential]

  any regression would likely cause problems only with VXLAN netdevs
  created by networkd.

  [scope]

  this is needed only for f.

  this was introduced by upstream commit 83cb24ac20b which was first in
  v243, so this bug does not exist in b and earlier.

  this was fixed by upstream commit
  7c9b26900cc33daf080627daf5904de74c1ef267 (and two following commits)
  which were first included in v246, so this is already fixed in g and
  later.

  [original description]

  
  Fixed upstream, please include [1].

  Thank you.

  [1] https://github.com/systemd/systemd/pull/15397

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: systemd 245.4-4ubuntu3.3
  ProcVersionSignature: Ubuntu 5.4.0-52.57-generic 5.4.65
  Uname: Linux 5.4.0-52-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.11
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Fri Nov  6 14:16:19 2020
  MachineType: QEMU Standard PC (Q35 + ICH9, 2009)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=C.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.4.0-52-generic root=UUID=97786d27-c04a-4592-a087-f19a689468a9 ro console=tty1 console=ttyS0
  SourcePackage: systemd
  UpgradeStatus: Upgraded to focal on 2020-08-27 (70 days ago)
  dmi.bios.date: 04/01/2014
  dmi.bios.vendor: SeaBIOS
  dmi.bios.version: rel-1.13.0-48-gd9c812dda519-prebuilt.qemu.org
  dmi.chassis.type: 1
  dmi.chassis.vendor: QEMU
  dmi.chassis.version: pc-q35-5.1
  dmi.modalias: dmi:bvnSeaBIOS:bvrrel-1.13.0-48-gd9c812dda519-prebuilt.qemu.org:bd04/01/2014:svnQEMU:pnStandardPC(Q35+ICH9,2009):pvrpc-q35-5.1:cvnQEMU:ct1:cvrpc-q35-5.1:
  dmi.product.name: Standard PC (Q35 + ICH9, 2009)
  dmi.product.version: pc-q35-5.1
  dmi.sys.vendor: QEMU

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