[Bug 1577001] Re: Installing lxd leaves /var/lib/lxd/unix.socket with wrong group ownership

Stéphane Graber stgraber at stgraber.org
Sun May 1 00:52:16 UTC 2016

Moving over to systemd, our unit is very clear about the expected owner
for the socket. The needed group is created in preinst so is guaranteed
to be there by the time systemd is poked in postinst. LXD itself doesn't
change socket ownership when socket activated and if it did, it would
honor the --group option which would have it chown to the right group.

** Package changed: lxd (Ubuntu) => systemd (Ubuntu)

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  Installing lxd leaves /var/lib/lxd/unix.socket with wrong group

Status in systemd package in Ubuntu:

Bug description:
  On ubuntu 16.04, doing
    sudo apt-get install lxd
  sometimes leaves the file
  with group root, but it should have group lxd.   Doing
    sudo systemctl restart lxd.socket
  rescues the file and gives it the right group ownership.

  Adding logging to the package's postinst shows that, if /var/lib/lxd/unix.socket did not already exist, it is created by the line
   deb-systemd-helper enable lxd.service
  and with the wrong group permissions.
  If the socket already existed with the correct group ownership that command breaks the permissions and sets it to be group root.

  It's about 90% repeatable on one machine here (with an SSD main disk).

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: lxd 2.0.0-0ubuntu4
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sat Apr 30 08:24:53 2016
  InstallationDate: Installed on 2016-03-26 (35 days ago)
  InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Beta amd64 (20160323)
  SourcePackage: lxd
  UpgradeStatus: No upgrade log present (probably fresh install)

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