[Bug 1864708] Re: Mount unit fails but systemctl status shows success

Wed Feb 26 20:47:23 UTC 2020

>  I don't know why, but this doesn't result in the "Mountpoint not
empty" error (or any error/warning for that matter). I thought systemd
should be able to figure out the order of nested mounts, not sure why
it's not working here.

because systemd doesn't mount zfs mounts; zfs is a "magical" filesystem
that mounts itself because it's just so smart and special.  All zfs
mounts are performed by 'zfs-mount.service' and systemd only creates
corresponding mount units after zfs performs the mounts (i.e. the
systemd mount units for zfs mounts only indicate the mount state, they
don't actually perform the mounting).

** Changed in: systemd (Ubuntu)
       Status: Incomplete => Invalid

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1864708

Title:
  Mount unit fails but systemctl status shows success

Status in systemd package in Ubuntu:
  Invalid

Bug description:
  I have this mount unit

  # cat /etc/systemd/system/srv-cctvstore.mount 
  [Unit]
  Description=Drive for CCTVstore

  [Mount]
  What=/dev/disk/by-id/ata-ST2000NM0011_Z1P21NQ7-part1
  Where=/srv/cctvstore
  Type=ext4
  Options=defaults

  [Install]
  WantedBy=multi-user.target

  On boot systemd thinks it is mounted:

  $ systemctl status srv-cctvstore.mount
  ● srv-cctvstore.mount - Drive for CCTVstore
     Loaded: loaded (/etc/systemd/system/srv-cctvstore.mount; enabled; vendor preset: enabled)
     Active: active (mounted) since Tue 2020-02-25 22:37:16 SAST; 48s ago
      Where: /srv/cctvstore
       What: /dev/sda1
    Process: 1294 ExecMount=/bin/mount /dev/disk/by-id/ata-ST2000NM0011_Z1P21NQ7-part1 /srv/cctvstore -t ext4 -o defaults (code=exited, status=0/SUCCESS)
      Tasks: 0 (limit: 4915)
     CGroup: /system.slice/srv-cctvstore.mount

  Feb 25 22:37:16 kluis systemd[1]: Mounting Drive for CCTVstore...
  Feb 25 22:37:16 kluis systemd[1]: Mounted Drive for CCTVstore.

  and the mount command seems to agree

  $ mount | grep cctv
  /dev/sda1 on /srv/cctvstore type ext4 (rw,relatime)

  but the mountpoint is empty:

  $ ls -al /srv/cctvstore/
  total 1
  drwxr-xr-x 2 root root 2 Dec  7 22:51 .
  drwxr-xr-x 4 root root 4 Dec  7 22:51 ..

  and umount thinks it is not mounted:

  $ sudo umount /srv/cctvstore 
  [sudo] password for johann: 
  umount: /srv/cctvstore: not mounted.

  journalctl doesn't report any funnies:

  $ journalctl -u srv-cctvstore.mount
  -- Logs begin at Tue 2020-02-25 22:37:16 SAST, end at Tue 2020-02-25 22:41:43 SAST. --
  Feb 25 22:37:16 kluis systemd[1]: Mounting Drive for CCTVstore...
  Feb 25 22:37:16 kluis systemd[1]: Mounted Drive for CCTVstore.

  but mounting by hand works:

  $ sudo mount /dev/sda1 /srv/cctvstore
  johann at kluis:~$ ls -al /srv/cctvstore
  total 3157
  drwxrwxrwx  7 root   root      4096 Dec  9 22:27 .
  drwxr-xr-x  4 root   root         4 Dec  7 22:51 ..
  drwxr-xr-x 14 165569 165569    4096 Dec 10 23:10 events
  drwxr-xr-x  2 165569 165569    4096 Dec  7 22:59 images
  drwxr-xr-x  2 165569 165569    4096 Dec  7 23:01 logs
  drwx------  2 root   root     16384 Dec  7 22:47 lost+found
  drwxrwxr-x  2 165569 165569 3194880 Feb 25 22:25 mlevents

  I am unsure where to go next, any help appreciated.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: systemd 237-3ubuntu10.39
  ProcVersionSignature: Ubuntu 5.3.0-40.32~18.04.1-generic 5.3.18
  Uname: Linux 5.3.0-40-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.9-0ubuntu7.11
  Architecture: amd64
  Date: Tue Feb 25 22:27:59 2020
  Lsusb:
   Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
   Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/ROOT/ubuntu@/boot/vmlinuz-5.3.0-40-generic root=ZFS=rpool/ROOT/ubuntu ro
  SourcePackage: systemd
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/07/2018
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P2.50
  dmi.board.name: E3C232D2I
  dmi.board.vendor: ASRockRack
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP2.50:bd03/07/2018:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRockRack:rnE3C232D2I:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.family: To Be Filled By O.E.M.
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.sku: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.
  modified.conffile..etc.systemd.resolved.conf: [modified]
  mtime.conffile..etc.systemd.resolved.conf: 2020-01-08T12:29:15.304369

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1864708/+subscriptions