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[Bug 1760173] Re: zfs, zpool commands hangs for 10 seconds without a /dev/zfs

 

I'd rather not change the default behaviour for non-container
environments as I want to be conservative here, so instead, I'm going to
check if $container exits and set the timeout to zero for this specific
case.

** Also affects: zfs-linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

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

** Also affects: zfs-linux (Ubuntu Artful)
   Importance: Undecided
       Status: New

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

** Also affects: zfs-linux (Ubuntu Cosmic)
   Importance: High
     Assignee: Colin Ian King (colin-king)
       Status: Triaged

** Also affects: lxd (Ubuntu Cosmic)
   Importance: Undecided
       Status: Invalid

** Also affects: zfs-linux (Ubuntu Bionic)
   Importance: Undecided
       Status: New

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

** No longer affects: lxd (Ubuntu Xenial)

** No longer affects: lxd (Ubuntu Artful)

** No longer affects: lxd (Ubuntu Bionic)

** No longer affects: lxd (Ubuntu Cosmic)

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https://bugs.launchpad.net/bugs/1760173

Title:
  zfs, zpool commands hangs for 10 seconds without a /dev/zfs

Status in lxd package in Ubuntu:
  Invalid
Status in zfs-linux package in Ubuntu:
  Triaged
Status in zfs-linux source package in Xenial:
  New
Status in zfs-linux source package in Artful:
  New
Status in zfs-linux source package in Bionic:
  New
Status in zfs-linux source package in Cosmic:
  Triaged

Bug description:
  1. # lsb_release -rd
  Description:	Ubuntu 16.04.4 LTS
  Release:	16.04

  2. # apt-cache policy zfsutils-linux
  zfsutils-linux:
    Installed: 0.6.5.6-0ubuntu19
    Candidate: 0.6.5.6-0ubuntu19
    Version table:
   *** 0.6.5.6-0ubuntu19 500
          500 http://archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages
          100 /var/lib/dpkg/status

  3. When inside a lxd container with zfs storage, zfs list or zpool
  status either return or report what's going on.

  4. When inside a lxd container with zfs storage, zfs list or zpool
  status appears to hang, no output for 10 seconds.

  strace reveals that without a /dev/zfs the tools wait for it to appear
  for 10 seconds but do not provide a command line switch to disable or
  make it more verbose.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: zfsutils-linux 0.6.5.6-0ubuntu19
  ProcVersionSignature: Ubuntu 4.13.0-36.40~16.04.1-generic 4.13.13
  Uname: Linux 4.13.0-36-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
  Date: Fri Mar 30 18:09:29 2018
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=C.UTF-8
  SourcePackage: zfs-linux
  UpgradeStatus: No upgrade log present (probably fresh install)

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