Fileserver (and Mediaserver & Torrentserver) failing to boot under LXC

[JedMeister]

The Fileserver (and Mediaserver & Torrentserver) containers are failing to successfully complete the boot process. The relevant lines from the journal:

Jul 05 01:39:05 test-fileserver systemd[1]: Reached target Local File Systems (Pre).
Jul 05 01:39:05 test-fileserver systemd[1]: Mounting /srv/homes...
Jul 05 01:39:05 test-fileserver systemd[1]: srv-homes.mount: Mount process exited, code=exited status=32
Jul 05 01:39:05 test-fileserver systemd[1]: Failed to mount /srv/homes.
Jul 05 01:39:05 test-fileserver systemd[1]: Dependency failed for Local File Systems.
Jul 05 01:39:05 test-fileserver systemd[1]: local-fs.target: Job local-fs.target/start failed with result 'dependency'.
Jul 05 01:39:05 test-fileserver systemd[1]: local-fs.target: Triggering OnFailure= dependencies.

The dependency that is failing is srv-homes.mount:

root@test-fileserver ~# systemctl status srv-homes.mount
* srv-homes.mount - /srv/homes
   Loaded: loaded (/etc/fstab; generated; vendor preset: enabled)
   Active: failed (Result: exit-code) since Thu 2018-07-05 02:42:28 UTC; 2min 27s ago
    Where: /srv/homes
     What: /home
     Docs: man:fstab(5)
           man:systemd-fstab-generator(8)
  Process: 209 ExecMount=/bin/mount /home /srv/homes -t bind -o 0 (code=exited, status=32)

Jul 05 02:42:28 test-fileserver systemd[1]: Mounting /srv/homes...
Jul 05 02:42:28 test-fileserver systemd[1]: srv-homes.mount: Mount process exited, code=exited status=32
Jul 05 02:42:28 test-fileserver systemd[1]: Failed to mount /srv/homes.
Jul 05 02:42:28 test-fileserver systemd[1]: srv-homes.mount: Unit entered failed state.

So the issue is that it's failing to mount /home /srv/homes bind -o 0 (i.e. mount bind /home to /srv/homes). However, I'm not really clear how/where that is being configured?!

FWIW:

root@test-fileserver ~# cat /etc/fstab 
# UNCONFIGURED FSTAB FOR BASE SYSTEM
/home /srv/homes bind 0 0

It certainly doesn't seem to be the case within the ISO install:

root@fileserver ~# systemctl status srv-homes.mount
Unit srv-homes.mount could not be found.

root@fileserver ~# cat /etc/fstab 
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
/dev/mapper/turnkey-root /               ext4    errors=remount-ro 0       1
/dev/mapper/turnkey-swap_1 none            swap    sw              0       0

[JedMeister]

Ok worked out how this scenario is occurring.

The fstab line is being added by the common/conf/nfs script. However, on the ISO build, the fstab is overwritten at install. Hence why I couldn't find anything relevant on the test VM I installed from ISO.

If I unpack the ISO though, the fstab (with the bind mount) is indeed there (as noted above in the LXC container). So I'm not sure on which builds it may be surviving? It's obviously at least surviving on the LXC build though! I assume that we didn't hit this issue on v14.x because we weren't using SystemD!

TBH, I'm not 100% sure on the rationale, but judging by the /etc/exports overlay (added same commit) I assume the point of the mount bind is so that nfs config more straight forward?! Do you recall @qrntz?

Regardless, the current config isn't working as intended at least on the ISO build (being overwritten) or the LXC build (breaks things) so for now, I'm going to leave common as is, open a new issue to fix the underlying issue and work around this issue, by removing the /etc/fstab for the LXC build (in buildtasks). Not ideal but will do for now...

[JedMeister]

Closed by turnkeylinux/buildtasks@63338fb