This change got reverted in livecd-rootfs and now breaks systemd
autopkgtest.
livecd-rootfs (2.683) groovy; urgency=medium
* Revert the removal of fstab from squashfs images, which has had knock-on
effects and breaks MAAS (ref bug #1890803)
-- Steve Langasek <steve.langa...@ubuntu.com> Wed, 12 Aug 2020
11:31:12 -0700
IMO LXD images should not contain invalid fstab and MAAS should be
fixed.
** Changed in: livecd-rootfs (Ubuntu)
Status: Fix Released => Triaged
** Also affects: systemd (Ubuntu)
Importance: Undecided
Status: New
** Tags added: update-excuse
** Changed in: systemd (Ubuntu)
Status: New => Triaged
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https://bugs.launchpad.net/bugs/1877078
Title:
Please ship empty /etc/fstab in LXD images
Status in livecd-rootfs package in Ubuntu:
Triaged
Status in systemd package in Ubuntu:
Triaged
Bug description:
Systemd boots degraded because of the invalid content of /etc/fstab:
$ lxc shell gg-test
root@gg-test:~# systemctl is-system-running
degraded
root@gg-test:~# systemctl list-units --failed
UNIT LOAD ACTIVE SUB DESCRIPTION
● systemd-remount-fs.service loaded failed failed Remount Root and Kernel
File Systems
LOAD = Reflects whether the unit definition was properly loaded.
ACTIVE = The high-level unit activation state, i.e. generalization of SUB.
SUB = The low-level unit activation state, values depend on unit type.
1 loaded units listed.
root@gg-test:~# cat /etc/fstab
LABEL=cloudimg-rootfs / ext4 defaults 0 0
root@gg-test:~# echo "" > /etc/fstab
root@gg-test:~# reboot
Session terminated, killing shell... ...killed.
rbalint@yogi:~$ lxc shell gg-test
root@gg-test:~# systemctl is-system-running
running
root@gg-test:~# systemctl list-units --failed
UNIT LOAD ACTIVE SUB DESCRIPTION
0 loaded units listed.
Not shipping is also fixing the issue, but some programs (such as systemd
autopkgtes) reads fstab and a missing fstab should be special-cased, thus that
would cause more breakages.
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