apt-btrfs-snapshot reports "Sorry, your system lacks support for the snapshot feature" on btrfs with existing @apt-snapshot-release-upgrade snapshots

[Karl-Philipp Richter]

apt-btrfs-snapshot reports "Sorry, your system lacks support for the snapshot feature" on btrfs with existing @apt-snapshot-release-upgrade snapshots which doesn't make sense because btrfs supports snapshots and snapshots exist.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: apt-btrfs-snapshot 0.3.4.2
Uname: Linux 4.8.0-040800-generic x86_64
NonfreeKernelModules: openafs
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
Date: Wed Oct 19 14:07:26 2016
InstallationDate: Installed on 2015-04-20 (547 days ago)
InstallationMedia: Ubuntu-Server 14.10 "Utopic Unicorn" - Release amd64 (20141022.2)
PackageArchitecture: all
ProcEnviron:
 TERM=screen.xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: apt-btrfs-snapshot
UpgradeStatus: Upgraded to xenial on 2016-10-19 (0 days ago)

[Jay Carlson (nop-nop)]

I ran into this too. I think this is because there is no longer a /sbin/btrfs. In /usr/lib/python3/dist-packages/apt_btrfs_snapshot.py :

        if not os.path.exists("/sbin/btrfs"):
            return False

Ubuntu 16.04 apparently places btrfs in /bin.

[Claudius Raphael Paeth (claudiusraphaelpaeth)]

I am sure this is duplicate to:

  https://bugs.launchpad.net/ubuntu/+source/apt-btrfs-snapshot/+bug/1454306

, whereas the only problem is (as Jay Carlson (nop-nop) wrote on 2017-09-20 in here) that the path has changed.

Due to inexpressible nonsense, the 'fix' is not available, even in the fourth point-release.

Solution is simple; create a symbolic link:

sudo ln -s /bin/btrfs /sbin/btrfs

Hope, it helps

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[johnny lee (johnnyl33-k)]

I can confirm this still happens on Ubuntu/Xubuntu 20.04 with apt-btrfs-snapshot v353. Is there any intention or when are they planning to fix this?