This bug was fixed in the package console-setup - 1.178ubuntu2.8
---------------
console-setup (1.178ubuntu2.8) bionic; urgency=medium
* setupcon: use /run for tempfiles (and dump the various unnecessary
fallback paths), since /run is always mountable rw at least as early as
/tmp is and is guaranteed to be safe from tmpcleaners at boot. Only keep
/tmp as a fallback in case we have access to write to /tmp and to a
console, but not to /run. LP: #1824227.
-- Steve Langasek <steve.langa...@ubuntu.com> Wed, 10 Apr 2019
13:13:34 -0700
** Changed in: console-setup (Ubuntu Bionic)
Status: Fix Committed => Fix Released
** Changed in: console-setup (Ubuntu Xenial)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1824227
Title:
console-setup failure due to race with systemd-tmpfiles
Status in console-setup package in Ubuntu:
Fix Released
Status in console-setup source package in Xenial:
Fix Released
Status in console-setup source package in Bionic:
Fix Released
Status in console-setup source package in Cosmic:
Fix Released
Status in console-setup source package in Disco:
Fix Released
Bug description:
[SRU Justification]
I'm seeing a console-setup.service failure quite regularly in testing
where the temp file that should have been created can't be found.
This is a regular xenial cloud image.
19:51:13 systemd-tmpfiles[485]: [/usr/lib/tmpfiles.d/var.conf:14] Duplicate
line for path "/var/log", ignoring.
...
19:51:13 systemd[1]: Starting Set console font and keymap...
19:51:15 setupcon[455]: /bin/setupcon: 809: /bin/setupcon: cannot open
/tmp/tmpkbd.a8FGSs: No such file
19:51:15 systemd[1]: console-setup.service: Main process exited,
code=exited, status=1/FAILURE
19:51:15 systemd[1]: Failed to start Set console font and keymap.
19:51:15 systemd[1]: console-setup.service: Unit entered failed state.
19:51:15 systemd[1]: console-setup.service: Failed with result 'exit-code'.
...
/bin/setupcon has a lovely tempfile function that looks like:
if \
TMPFILE=`mktemp /tmp/tmpkbd.XXXXXX 2>/dev/null` \
|| TMPFILE=`mktemp /run/tmpkbd.XXXXXX 2>/dev/null` \
|| TMPFILE=`mktemp /dev/.tmpkbd.XXXXXX 2>/dev/null` \
|| TMPFILE=`mktemp /lib/init/rw/tmpkbd.XXXXXX 2>/dev/null` \
|| TMPFILE=`mktemp 2>/dev/null`
Here's our edited IRC conversation on the bug:
<@vorlon> so I do think you're being hit by the tmp cleaner
<@vorlon> also this seems like bad pathological default behavior for
the tmp cleaner, to delete files that have just been created
<@vorlon> but we should fix console-setup to not rely on /tmp
<@vorlon> and I prefer that we do that instead of trying to fiddle with
the ordering of the systemd units on startup
<@vorlon> i.e. console-setup has an undeclared dependency
on systemd-tmpfiles-clean; let's remove the dependency
instead of declaring it
<@vorlon> are you failing the race more often now than in the past?
<@rcj> vorlon: it feels like it's failing more often but I don't have
data to answer that.
<@vorlon> are we shipping an image with a dirty rootfs?
<@vorlon> dirty in the sense that e2fsck doesn't take one look at it,
say "yep, nothing to do here" and exit
<@vorlon> in the sense that this is what would make dev-sda1.device slow
to complete AIUI
<@rcj> would filesystem resize on first boot mark it dirty? Because
that will happen
<@vorlon> huh good question
<@vorlon> it might
<xnox> rcj, unclean shutdown?
<@rcj> xnox: first boot
[Test case]
1. Install console-setup from -proposed
2. Reboot
3. Verify that `systemctl status console-setup` shows that the service has
completed successfully.
Since this is a race, additional fuzz testing may be warranted for the
cloud images to confirm that the issue experienced in GCE is really
fixed. However, that should not block promotion of this SRU fix since
there definitely is a race here that should be fixed per se even if
there are other issues still causing a failure in GCE.
[Regression potential]
None known. /run is guaranteed to be mounted rw very early in boot -
generally before /tmp is mounted, due to /tmp being on the rootfs that needs to
be fscked before remount.
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: console-setup 1.108ubuntu15.4
ProcVersionSignature: User Name 4.15.0-1029.31~16.04.1-gcp 4.15.18
Uname: Linux 4.15.0-1029-gcp x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
Date: Wed Apr 10 19:24:12 2019
PackageArchitecture: all
ProcEnviron:
TERM=xterm-256color
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
SourcePackage: console-setup
UpgradeStatus: No upgrade log present (probably fresh install)
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