landscape-sysinfo shows usage of /home instead of the root directory

[Danilcha]

I'm on a VDS, Ubuntu 14.04. I only have one real filesystem mounted, and it's mounted on '/'. However, the landscape-sysinfo (and the motd message) writes: Usage of /home: unknown.

[Danilcha (danilcha)]

$ mount
/vz/private/10073 on / type simfs (rw,relatime,usrquota,grpquota)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,relatime)
none on /dev type devtmpfs (rw,nosuid,noexec,relatime,mode=755)
none on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,nosuid,nodev,noexec,relatime)
none on /sys/fs/cgroup type tmpfs (rw,relatime,size=4k,mode=755)
none on /run type tmpfs (rw,nosuid,noexec,relatime,size=104860k,mode=755)
none on /run/lock type tmpfs (rw,nosuid,nodev,noexec,relatime,size=5120k)
none on /run/shm type tmpfs (rw,relatime)
none on /run/user type tmpfs (rw,nosuid,nodev,noexec,relatime,size=102400k,mode=755)

$ landscape-sysinfo --version
14.12-0ubuntu0.14.04

[Danilcha (danilcha)]

Still the same on 16.03+bzr834-0ubuntu2.16.04.4

[Dave Jones (waveform)]

I suspect this is due to the unusual "simfs" file-system not being in landscape's whitelist of file-systems that are "safe" to probe. I'll take a look at it.

[Dave Jones (waveform)]

Fix pushed as PR #47 (https://github.com/CanonicalLtd/landscape-client/pull/47)

[Mathew Hodson (mhodson)]

https://github.com/CanonicalLtd/landscape-client/commit/d8cb79e158bb888292e5d89c94f2fb2573819f8e

[Krzysztof Kulesza (prezeskk)]

The same error is when root filesystem is btrfs

[Launchpad Janitor (janitor)]

This bug was fixed in the package landscape-client - 19.12-0ubuntu1

---------------
landscape-client (19.12-0ubuntu1) focal; urgency=medium

  * New upstream release 19.12:
    - Modernized packaging.
    - Added support for python-apt 1.9
    - Converted init script to systemd service.
    - Set default value if data_path is missing. (LP: #1728681)
    - Sysinfo: add support for multiple IPv6 addresses per interface.
      (LP: #829379)
    - Clear hash id database on package resync. (LP: #1616116)
    - Permit environments containing unicode chars for script execution.
      (LP: #1765518)
    - Set LANG in sysinfo wrapper. (LP: #1780071)
    - Avoid leaking memory through unused twisted logs. (LP: #1685885)
    - Handle unicode apt-sources-replace (LP: #1771443)
    - Add simfs to the whitelist of watched file-systems (LP: #1499104)
    - Return non-blank message when tasks already performed. (LP: #928933)
    - Overrid apt progress pulse(). (LP: #1758529)
    - Improvements on vm_info detection (LP: #1754073) (LP: #1799843)
      (LP: #1828217)
    - Remove the landscape url from motd output by removing LandscapeLink
      from the list of default landscape-sysinfo plugins. (LP: #1753936)

 -- Simon Poirier <email address hidden> Wed, 04 Dec 2019 14:12:24 +0000

[Nate Stuyvesant (nstuyvesant)]

Running Ubuntu 21.10 with root on ZFS and still getting this problem.
  Usage of /home: unknown

[Alyssa Rowan (akr)]

Still happening in 19.12-0ubuntu13 on Ubuntu 22.04.1, installed from subiquity with a btrfs root. There is no separate /home mount on this install, but root is btrfs.

[Alex Pardoe (digitalpardoe)]

This is definitely still affecting me on 22.10 with a BTRFS root partition, it's also surprising to me that the memory plugin doesn't exclude swap if no swap is provisioned.

[Juanmi Taboada (juanmitaboada)]

I am taking over this bug and trying to address a solution.

[Juanmi Taboada (juanmitaboada)]

I have created a new virtual machine installing Ubuntu 22.10 and btrfs as a root filesystem. I see that the easy solution is to update the whitelist.

PR resolves this issue:
https://github.com/CanonicalLtd/landscape-client/pull/154

Test scenario:
$ mount | grep btrfs
/dev/sda3 on / type btrfs (rw,relatime,space_cache=v2,subvolid=256,subvol=/@)
/dev/sda3 on /home type btrfs (rw,relatime,space_cache=v2,subvolid=257,subvol=/@home)

Before adding btrfs to the whitelist:
$ ./scripts/landscape-sysinfo
  System load: 0.24 Processes: 246
  Usage of /home: unknown Users logged in: 1
  Memory usage: 6% IPv4 address for enp0s3: 192.168.2.191
  Swap usage: 0%

After adding btrfs to the whitelist:
$ ./scripts/landscape-sysinfo
  System load: 2.99 Processes: 258
  Usage of /home: 90.7% of 9.81GB Users logged in: 1
  Memory usage: 7% IPv4 address for enp0s3: 192.168.2.191
  Swap usage: 0%

  => / is using 90.7% of 9.81GB