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

[Launchpad Bug Tracker]

This bug was fixed in the package lxd - 2.1-0ubuntu2

---
lxd (2.1-0ubuntu2) yakkety; urgency=medium

  * Properly handle purge. (LP: #1614621)
  * Configure system-wide dnsmasq not to touch lxdbr0. (LP: #1613820)
  * Stop lxd.socket on package remove. (LP: #1577001)

 -- Stéphane Graber   Mon, 29 Aug 2016 17:29:27
-0400

** Changed in: lxd (Ubuntu)
   Status: In Progress => Fix Released

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

Status in lxd package in Ubuntu:
  Fix Released
Status in systemd package in Ubuntu:
  Fix Released

Bug description:
  On ubuntu 16.04, doing
sudo apt-get install lxd
  sometimes leaves the file
/var/lib/lxd/unix.socket
  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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[Touch-packages] [Bug 1577001] Re: Installing lxd leaves /var/lib/lxd/unix.socket with wrong group ownership

[Stéphane Graber]

** Changed in: lxd (Ubuntu)
   Status: Triaged => In Progress

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

Status in lxd package in Ubuntu:
  In Progress
Status in systemd package in Ubuntu:
  Fix Released

Bug description:
  On ubuntu 16.04, doing
sudo apt-get install lxd
  sometimes leaves the file
/var/lib/lxd/unix.socket
  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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[Touch-packages] [Bug 1577001] Re: Installing lxd leaves /var/lib/lxd/unix.socket with wrong group ownership

[Stéphane Graber]

** Changed in: lxd (Ubuntu)
   Importance: High => Low

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

Status in lxd package in Ubuntu:
  Triaged
Status in systemd package in Ubuntu:
  Fix Released

Bug description:
  On ubuntu 16.04, doing
sudo apt-get install lxd
  sometimes leaves the file
/var/lib/lxd/unix.socket
  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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[Touch-packages] [Bug 1577001] Re: Installing lxd leaves /var/lib/lxd/unix.socket with wrong group ownership

[Launchpad Bug Tracker]

This bug was fixed in the package systemd - 230-1git1

---
systemd (230-1git1) yakkety; urgency=medium

  * Don't add a Breaks: against usb-modeswitch when building on Ubuntu; there
it does not use hotplug.functions and is a lower version.
  * boot-and-services autopkgtest: Add missing xserver-xorg and
lightdm-greeter test dependencies, so that lightdm can start.
(See LP #1581106)

 -- Martin Pitt   Wed, 25 May 2016 09:37:41
+0200

** Changed in: systemd (Ubuntu)
   Status: Fix Committed => Fix Released

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

Status in lxd package in Ubuntu:
  Triaged
Status in systemd package in Ubuntu:
  Fix Released

Bug description:
  On ubuntu 16.04, doing
sudo apt-get install lxd
  sometimes leaves the file
/var/lib/lxd/unix.socket
  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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[Touch-packages] [Bug 1577001] Re: Installing lxd leaves /var/lib/lxd/unix.socket with wrong group ownership

[Stéphane Graber]

** Changed in: lxd (Ubuntu)
   Status: New => Triaged

** Changed in: lxd (Ubuntu)
   Importance: Undecided => High

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https://bugs.launchpad.net/bugs/1577001

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

Status in lxd package in Ubuntu:
  Triaged
Status in systemd package in Ubuntu:
  Fix Committed

Bug description:
  On ubuntu 16.04, doing
sudo apt-get install lxd
  sometimes leaves the file
/var/lib/lxd/unix.socket
  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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[Touch-packages] [Bug 1577001] Re: Installing lxd leaves /var/lib/lxd/unix.socket with wrong group ownership

[Martin Pitt]

On the systemd side this was fixed upstream in
https://github.com/systemd/systemd/commit/01a8b4675. However, lxd's
postrm still needs to be fixed to stop lxd.socket on removal.

** Changed in: systemd (Ubuntu)
   Status: Confirmed => Fix Committed

** Changed in: systemd (Ubuntu)
 Assignee: (unassigned) => Martin Pitt (pitti)

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

Status in lxd package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  Fix Committed

Bug description:
  On ubuntu 16.04, doing
sudo apt-get install lxd
  sometimes leaves the file
/var/lib/lxd/unix.socket
  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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[Touch-packages] [Bug 1577001] Re: Installing lxd leaves /var/lib/lxd/unix.socket with wrong group ownership

[Martin Pitt]

> @Martin: the problem doesn't reproduce for me if lxd.socket isn't
running before installing lxd.

Thanks for confirming, then it seems we nailed this indeed. Thanks for
confirming!

> Purging lxd should stop lxd and lxd.socket, shouldn't it?

Correct, that's what the lxd task is for.

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

Status in lxd package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  On ubuntu 16.04, doing
sudo apt-get install lxd
  sometimes leaves the file
/var/lib/lxd/unix.socket
  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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[Touch-packages] [Bug 1577001] Re: Installing lxd leaves /var/lib/lxd/unix.socket with wrong group ownership

[Dan Kegel]

@Martin: the problem doesn't reproduce for me if lxd.socket isn't running 
before installing lxd.
That's why I posted the script along with output for the ls -l, to show what 
happens for me in the two cases.

Purging lxd should stop lxd and lxd.socket, shouldn't it?

Thanks!

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

Status in lxd package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  On ubuntu 16.04, doing
sudo apt-get install lxd
  sometimes leaves the file
/var/lib/lxd/unix.socket
  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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[Touch-packages] [Bug 1577001] Re: Installing lxd leaves /var/lib/lxd/unix.socket with wrong group ownership

[Martin Pitt]

@Dan: I know that my reproducer works. I just wondered if you can
reproduce this with a clean install of lxd when it was *not* previously
installed (or at least lxd.socket is not running before apt-get install
lxd).

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

Status in lxd package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  On ubuntu 16.04, doing
sudo apt-get install lxd
  sometimes leaves the file
/var/lib/lxd/unix.socket
  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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[Touch-packages] [Bug 1577001] Re: Installing lxd leaves /var/lib/lxd/unix.socket with wrong group ownership

[Dan Kegel]

@martin: I'm on desktop, fwiw.  I think you nailed it:

apt-cache policy lxd systemd
# lxd:
#   Candidate: 2.0.0-0ubuntu4
# systemd:
#   Installed: 229-4ubuntu4
 
# Clean initial conditions
sudo apt purge -y lxd || true
sudo systemctl stop lxd.socket || true
sudo rm -f /var/lib/lxd/unix.socket
  
echo "Demonstrate proper functioning on first install"
sudo apt install -y lxd
ls -l /var/lib/lxd/unix.socket
# srw-rw 1 root lxd 0 May  2 10:10 /var/lib/lxd/unix.socket

echo "Purge (bug: leaves lxd.socket running, leaves unix.socket present!)"
sudo apt purge -y lxd 
ls -l /var/lib/lxd/unix.socket
# srw-rw 1 root lxd 0 May  2 10:10 /var/lib/lxd/unix.socket

echo "Reinstall (bug: breaks group ownership of unix.socket!)"
sudo apt install -y lxd
ls -l /var/lib/lxd/unix.socket
# srw-rw 1 root root 0 May  2 10:10 /var/lib/lxd/unix.socket

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

Status in lxd package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  On ubuntu 16.04, doing
sudo apt-get install lxd
  sometimes leaves the file
/var/lib/lxd/unix.socket
  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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[Touch-packages] [Bug 1577001] Re: Installing lxd leaves /var/lib/lxd/unix.socket with wrong group ownership

[Martin Pitt]

I created https://github.com/systemd/systemd/issues/3171 for changing
the socket group on reload with an absent unit. This will not be an
issue any more when lxd's prerm stops `lxd.socket` on removal, but (1)
this sounds worth fixing anyway, and (2) I have some feeling that the
above reproducer is not the complete story here yet. Waiting on Dan's
answer for that.

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

Status in lxd package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  On ubuntu 16.04, doing
sudo apt-get install lxd
  sometimes leaves the file
/var/lib/lxd/unix.socket
  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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[Touch-packages] [Bug 1577001] Re: Installing lxd leaves /var/lib/lxd/unix.socket with wrong group ownership

[Martin Pitt]

** Also affects: lxd (Ubuntu)
   Importance: Undecided
   Status: New

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

Status in lxd package in Ubuntu:
  New
Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  On ubuntu 16.04, doing
sudo apt-get install lxd
  sometimes leaves the file
/var/lib/lxd/unix.socket
  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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[Touch-packages] [Bug 1577001] Re: Installing lxd leaves /var/lib/lxd/unix.socket with wrong group ownership

[Stéphane Graber]

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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Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1577001

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

Status in systemd package in Ubuntu:
  Confirmed

Bug description:
  On ubuntu 16.04, doing
sudo apt-get install lxd
  sometimes leaves the file
/var/lib/lxd/unix.socket
  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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