** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
** Tags added: kernel-da-key
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https://bugs.launchpad.net/bugs/1616949
Title:
guest on bridge becomes inaccessible
Status in linux package in Ubuntu:
Incomplete
Bug description:
We have a "virtual maas" setup where we have a maas node on a linux
bridge (created by libvirt) and some other number of nodes on that
same bridge.
the maas node then controls the other nodes turning them on and off
and generally working maas-like magic.
In this scenario on 16.04 with when deploying 3 or so nodes at a time,
the maas node becomes inaccessible, and as it is the root device for
iscsi storage of the installs, the nodes fail also.
This occurred with xenial kernel (4.4).
Reverting the kernel to 3.19 (linux-lts-vivid) kernel fixes the problem.
https://launchpad.net/ubuntu/+source/linux-lts-vivid
Specifically, the fixed kernel is
$ dpkg-query --show | grep linux-.*3.19
linux-image-3.19.0-66-generic 3.19.0-66.74~14.04.1
linux-image-extra-3.19.0-66-generic 3.19.0-66.74~14.04.1
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-34-generic 4.4.0-34.53
ProcVersionSignature: Ubuntu 3.19.0-66.74~14.04.1-generic 3.19.8-ckt22
Uname: Linux 3.19.0-66-generic ppc64le
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Aug 25 12:10 seq
crw-rw---- 1 root audio 116, 33 Aug 25 12:10 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: ppc64el
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: Thu Aug 25 14:37:07 2016
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lsusb:
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
PciMultimedia:
ProcEnviron:
TERM=screen
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB:
ProcKernelCmdLine: root=/dev/mapper/mpath0-part2 ro console=hvc0
ProcLoadAvg: 0.40 0.28 0.46 1/1337 140794
ProcSwaps:
Filename Type Size Used Priority
/swap.img file 8388544 0 -1
ProcVersion: Linux version 3.19.0-66-generic (buildd@bos01-ppc64el-021) (gcc
version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04.3) ) #74~14.04.1-Ubuntu SMP Tue Jul
19 19:54:47 UTC 2016
RelatedPackageVersions:
linux-restricted-modules-3.19.0-66-generic N/A
linux-backports-modules-3.19.0-66-generic N/A
linux-firmware 1.157.3
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
cpu_cores: Number of cores present = 20
cpu_coreson: Number of cores online = 20
cpu_dscr: DSCR is 0
cpu_freq:
min: 3.667 GHz (cpu 120)
max: 3.691 GHz (cpu 0)
avg: 3.689 GHz
cpu_runmode:
Could not retrieve current diagnostics mode,
No kernel interface to firmware
cpu_smt: SMT is off
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