Public bug reported:
If an attempt is made to mount an overlay filesystem over the /var/log
directory, this causes sssd to refuse to start up.
The startup fails at the point where sssd attempts to write to its
logfiles:
sssd: Could not open file [/var/log/sssd/sssd.log]. Error:
[13][Permission denied]
sssd is running as root, and should have no problem writing to logfiles.
Removing the -f option from sssd causes sshd to not attempt to write to
/var/log/ssshd/ssshd.log and sshd startup succeeds.
Running sssd without any flags logs to syslog, and this works correctly,
logging to /var/log/syslog on the overlayfs filesystem.
Removing the file /etc/apparmor.d/usr.sbin.sssd causes sssd to start up
correctly, logging to the overlayfs /var/log/sssd directory without an
issue.
Looks like the apparmour configration for sssd breaks when an overlayfs
is present.
** Affects: sssd (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1620744
Title:
sssd + overlay filesystem startup failure: Could not open file
[/var/log/sssd/sssd.log]. Error: [13][Permission denied]
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