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Message #73416
[Bug 1349883] Re: dmesg time wildly incorrect on paravirtual EC2 instances.
You're correct on your findings. m1.small, paravirtual guest.
I'm in the process of migrating my company's servers from 12.04 to
14.04. It was during this migration that I realized I was seeing syslog-
ng logs for October 2014 or later (ie months into the future) on the new
14.04 instances, and I've been seeing it intermittently when launching
new instances. Not always, but on some launches, or on some reboots. I
think it's either some some sort of race condition, or related to what
Amazon hardware the instance is actually spun up on.
--
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https://bugs.launchpad.net/bugs/1349883
Title:
dmesg time wildly incorrect on paravirtual EC2 instances.
Status in “linux” package in Ubuntu:
Confirmed
Bug description:
On Ubuntu 14.04 EC2 instances, during startup the dmesg time goes from
0 seconds to thousands of seconds. This causes kernel logs to be
recorded for months in the future.
This appears to be related to the kernel trusting the TSC clock on Xen servers, as described here:
https://forums.aws.amazon.com/thread.jspa?threadID=59753
But I am not sure that is the cause.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-32-generic 3.13.0-32.57
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
Uname: Linux 3.13.0-32-generic x86_64
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Jul 29 14:41 seq
crw-rw---- 1 root audio 116, 33 Jul 29 14:41 timer
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.14.1-0ubuntu3.2
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:
CRDA: Error: [Errno 2] No such file or directory: 'iw'
CurrentDmesg: [7562292.301737] init: plymouth-upstart-bridge main process ended, respawning
Date: Tue Jul 29 14:47:54 2014
Ec2AMI: ami-00dc1368
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: us-east-1c
Ec2InstanceType: m1.small
Ec2Kernel: aki-919dcaf8
Ec2Ramdisk: unavailable
IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
Lspci:
Lsusb: Error: [Errno 2] No such file or directory: 'lsusb'
PciMultimedia:
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB:
ProcKernelCmdLine: root=LABEL=cloudimg-rootfs ro console=hvc0
RelatedPackageVersions:
linux-restricted-modules-3.13.0-32-generic N/A
linux-backports-modules-3.13.0-32-generic N/A
linux-firmware N/A
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
WifiSyslog:
---
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Jul 29 14:41 seq
crw-rw---- 1 root audio 116, 33 Jul 29 14:41 timer
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
CRDA: Error: [Errno 2] No such file or directory
CurrentDmesg: [7562292.301737] init: plymouth-upstart-bridge main process ended, respawning
DistroRelease: Ubuntu 14.04
Ec2AMI: ami-00dc1368
Ec2AMIManifest: (unknown)
Ec2AvailabilityZone: us-east-1c
Ec2InstanceType: m1.small
Ec2Kernel: aki-919dcaf8
Ec2Ramdisk: unavailable
IwConfig: Error: [Errno 2] No such file or directory
Lspci:
Lsusb: Error: [Errno 2] No such file or directory
Package: linux (not installed)
PciMultimedia:
ProcEnviron:
TERM=xterm
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcFB:
ProcKernelCmdLine: root=LABEL=cloudimg-rootfs ro console=hvc0
ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
RelatedPackageVersions:
linux-restricted-modules-3.13.0-32-generic N/A
linux-backports-modules-3.13.0-32-generic N/A
linux-firmware N/A
RfKill: Error: [Errno 2] No such file or directory
Tags: trusty ec2-images
Uname: Linux 3.13.0-32-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin ssh sudo
WifiSyslog:
_MarkForUpload: True
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References