Public bug reported:
booting a snappy system which comes with a readonly file system that
carries /etc/mtab as pre-created link in the readonly area of the fs
(pointing to /proc/mounts), we always get an error message on boot when
systemd-tmpfiles tries to re-create the mtab link.
systemd-tmpfiles should instead check if /etc/mtab is already there, is
a link and points to the desired target. in this case it should just
skip the creation attempt gracefully without error.
Feb 17 18:56:51 localhost systemd[1]: Starting Create Volatile Files and
Directories...
Feb 17 18:56:51 localhost systemd-tmpfiles[631]:
[/usr/lib/tmpfiles.d/var.conf:14] Duplicate line for path "/var/log"
, ignoring.
Feb 17 18:56:51 localhost systemd-tmpfiles[631]: symlink(../proc/self/mounts,
/etc/mtab) failed: Read-only file syste
m
Feb 17 18:56:51 localhost systemd[1]: systemd-tmpfiles-setup.service: Main
process exited, code=exited, status=1/FAIL
URE
** Affects: systemd (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1547033
Title:
please allow /etc/mtab to be a pre-existing link on readonly
filesystems
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