=== Begin SRU Template ===
[Impact]
lxc containers would show warnings in /var/log/cloud-init.log.
This was because attempts were made to read dmi information from
inside the (unpriviledged) container. Such attempts to read
dmi data like /sys/class/dmi/id/product_serial would then result
in an attempt to run dmidecode which would also fail.
[Test Case]
To test this, simply
a.) create an lxd instance from a image with -proposed version of cloud-init
$ release=xenial
$ ref=$release-1701325
$ lxc-proposed-snapshot --proposed --publish $release $ref
$ lxc launch $ref $name
b.) lxc exec $name -- grep WARN /var/log/cloud-init.log
[Regression Potential]
A regression caused by this change is possible on some system where
systemd identified the system as a container but the container platform provided
simulated/virtualized dmi information in /sys/class/dmi/id.
The check for for container is done with:
systemd-detect-virt --quite --container
[Other Info]
Upstream commit at
https://git.launchpad.net/cloud-init/commit/?id=4d9f24f5c3
This was actually a regression of the upstream fix for bug 1691772.
That never entered a stable Ubuntu release. The testing here is
actually a test against regression.
The upstream commit for that change is at
https://git.launchpad.net/cloud-init/commit/?id=802e7cb2da
lxc-proposed-snapshot is
https://git.launchpad.net/~smoser/cloud-init/+git/sru-info/tree/bin/lxc-proposed-snapshot
It publishes an image to lxd with proposed enabled and cloud-init upgraded.
=== End SRU Template ===
I launched an instance of artful.
Looked in /var/log/cloud-init.log and saw:
2017-06-29 16:00:15,222 - util.py[DEBUG]: Reading from /sys/class/dmi/id/product_serial (quiet=False)
2017-06-29 16:00:15,222 - util.py[WARNING]: failed read of /sys/class/dmi/id/product_serial
2017-06-29 16:00:15,223 - util.py[DEBUG]: failed read of /sys/class/dmi/id/product_serial
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 2359, in _read_dmi_syspath
key_data = load_file(dmi_key_path, decode=False)
File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 1283, in load_file
with open(fname, 'rb') as ifh:
PermissionError: [Errno 13] Permission denied: '/sys/class/dmi/id/product_serial'
2017-06-29 16:00:15,225 - util.py[DEBUG]: Running command ['/usr/sbin/dmidecode', '--string', 'system-serial-number'] with allowed return codes [0] (shell=False, capture=True)
2017-06-29 16:00:15,228 - util.py[DEBUG]: failed dmidecode cmd: ['/usr/sbin/dmidecode', '--string', 'system-serial-number']
Unexpected error while running command.
Command: ['/usr/sbin/dmidecode', '--string', 'system-serial-number']
Exit code: 1
Reason: -
Stdout: -
Stderr: /sys/firmware/dmi/tables/smbios_entry_point: Permission denied
/dev/mem: No such file or directory
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: cloud-init 0.7.9-197-gebc9ecbc-0ubuntu1
ProcVersionSignature: Ubuntu 4.10.0-22.24-generic 4.10.15
Uname: Linux 4.10.0-22-generic x86_64
ApportVersion: 2.20.5-0ubuntu5
Architecture: amd64
Date: Thu Jun 29 16:47:51 2017
PackageArchitecture: all
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
LANG=C.UTF-8
SourcePackage: cloud-init
UpgradeStatus: No upgrade log present (probably fresh install)
Status changed to 'Confirmed' because the bug affects multiple users.