Public bug reported:
When provisioning Ubuntu servers with MAAS at once, some bonding pairs
will have unexpected LACP status such as "Expired". It randomly happens
at each provisioning with the default xenial kernel(4.4), but not
reproducible with HWE kernel(4.13). I'm using Intel X710 cards (Dell-
branded).
Using the HWE kernel works as a workaround for short term, but it's not
ideal since 4.13 is not covered by Canonical Livepatch service.
How to reproduce:
1. configure LACP bonding with MAAS
2. provision machines
3. check the bonding status in /proc/net/bonding/bond*
frequency of occurrence:
About 5 bond pairs in 22 pairs at each provisioning.
[reproducible combination]
$ uname -a
Linux comp006 4.4.0-116-generic #140-Ubuntu SMP Mon Feb 12 21:23:04 UTC 2018
x86_64 x86_64 x86_64 GNU/Linux
$ sudo ethtool -i eno1
driver: i40e
version: 1.4.25-k
firmware-version: 6.00 0x800034e6 18.3.6
expansion-rom-version:
bus-info: 0000:01:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes
[non-reproducible combination]
$ uname -a
Linux comp006 4.13.0-36-generic #40~16.04.1-Ubuntu SMP Fri Feb 16 23:25:58 UTC
2018 x86_64 x86_64 x86_64 GNU/Linux
$ sudo ethtool -i eno1
driver: i40e
version: 2.1.14-k
firmware-version: 6.00 0x800034e6 18.3.6
expansion-rom-version:
bus-info: 0000:01:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-116-generic 4.4.0-116.140
ProcVersionSignature: Ubuntu 4.4.0-116.140-generic 4.4.98
Uname: Linux 4.4.0-116-generic x86_64
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Mar 6 06:37 seq
crw-rw---- 1 root audio 116, 33 Mar 6 06:37 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.1-0ubuntu2.15
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq',
'/dev/snd/timer'] failed with exit code 1:
Date: Tue Mar 6 06:46:32 2018
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb:
Bus 002 Device 002: ID 8087:8002 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 003: ID 413c:a001 Dell Computer Corp. Hub
Bus 001 Device 002: ID 8087:800a Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: Dell Inc. PowerEdge R730
PciMultimedia:
ProcEnviron:
TERM=screen
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB: 0 EFI VGA
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-116-generic.efi.signed
root=UUID=0528f88e-cf1a-43e2-813a-e7261b88d460 ro console=tty0
console=ttyS0,115200n8
RelatedPackageVersions:
linux-restricted-modules-4.4.0-116-generic N/A
linux-backports-modules-4.4.0-116-generic N/A
linux-firmware 1.157.17
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/16/2017
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 2.5.5
dmi.board.name: 072T6D
dmi.board.vendor: Dell Inc.
dmi.board.version: A08
dmi.chassis.asset.tag: 0018880
dmi.chassis.type: 23
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvr2.5.5:bd08/16/2017:svnDellInc.:pnPowerEdgeR730:pvr:rvnDellInc.:rn072T6D:rvrA08:cvnDellInc.:ct23:cvr:
dmi.product.name: PowerEdge R730
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug cpe-onsite uec-images xenial
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https://bugs.launchpad.net/bugs/1753662
Title:
[i40e] LACP bonding start up race conditions
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