touch-packages team mailing list archive

[Serge Hallyn <1354375@xxxxxxxxxxxxxxxxxx>]

Thanks for reporting this bug.  I'm afraid snapshotting is currently not
compatible with LVM.  In the short term we should simply refuse snapshots
for lvm-backed containers.  In the longer term, we'll need the lvm backing
store to provide a different naming scheme for snapshots, and its own
snapshot restoration algorithm.

 status: confirmed
 importance: high


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

** Changed in: lxc (Ubuntu)
       Status: New => Confirmed

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https://bugs.launchpad.net/bugs/1354375

Title:
  lxc-snapshot destroys container

Status in “lxc” package in Ubuntu:
  Confirmed

Bug description:
  Was following instructions for lxc-snapshots at:

    https://help.ubuntu.com/lts/serverguide/lxc.html

  The problem I am reporting is that when I create a snapshot with:

    lxc-snapshot -n c1

  which creates snap0 (snap1...snapN, etc.), after I try restore the
  snapshot with:

    lxc-snapshot -r snap0 -n c1

  lxc seems to happily remove snap0 and c1, thus destroying the entire
  container. I would paste the output, but it was via a vbox vm and
  wasn't easy to copy/paste the text, so I have attached a screenshot
  instead.

  The release was 14.0.4.1 LTS with lxc 1.0.5-0ubuntu0.1. What I
  expected was for the snapshot to first remove c1 and then rename snap0
  to c1. Seeing as how the c1 container was a LVM snapshot I can see
  that removing c1 (the origin of snap0) might be the reason for it
  killing snap0 and c1, but it seems a little unpexted, especially if
  this had been more than a test.

  Is this a real bug?

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: lxc 1.0.5-0ubuntu0.1
  ProcVersionSignature: Ubuntu 3.13.0-32.57-generic 3.13.11.4
  Uname: Linux 3.13.0-32-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.3
  Architecture: amd64
  Date: Fri Aug  8 05:58:41 2014
  InstallationDate: Installed on 2014-08-07 (0 days ago)
  InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
  ProcEnviron:
   LANGUAGE=en_CA:en
   TERM=linux
   PATH=(custom, no user)
   LANG=en_CA.UTF-8
   SHELL=/bin/bash
  SourcePackage: lxc
  UpgradeStatus: No upgrade log present (probably fresh install)
  defaults.conf:
   lxc.network.type = veth
   lxc.network.link = lxcbr0
   lxc.network.flags = up
   lxc.network.hwaddr = 00:16:3e:xx:xx:xx

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