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[Serge Hallyn <1571209@xxxxxxxxxxxxxxxxxx>]

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

** Also affects: libvirt (Ubuntu Wily)
   Importance: Undecided
       Status: New

** Also affects: libvirt (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Also affects: libvirt (Ubuntu Precise)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1571209

Title:
  Sockfile check retries too short for a busy system boot

Status in libvirt package in Ubuntu:
  Confirmed
Status in libvirt source package in Precise:
  New
Status in libvirt source package in Trusty:
  New
Status in libvirt source package in Wily:
  New
Status in libvirt source package in Xenial:
  New

Bug description:
  [ problem description ]

  sockfile_check_retries is first introduced by #1455608, for preventing
  the failure case of sockfile not ready, but it was default to a hard-
  coded value "5", it might be too short for a busy system boot.

  #1455608 -
  https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1455608

  
  [ step to reproduce ]

  setup a clean install system (Ubuntu Server 14.04.4 LTS), and assemble
  os disk as RAID-1, boot up some guest instances (count > 10, start-at-
  boot), force shutdown host by pressing power-button for 3s ~ 5s, or
  via IPMI command, then power-on afterward. it may sometimes failed to
  get sockfile ready after in "post-start" script, with an line of error
  in /var/log/syslog,

  ==> kernel: [ 313.059830] init: libvirt-bin post-start process (2430)
  terminated with status 1 <==

  since there's multiple VMs Read/Write before a non-graceful shutdown,
  RAID devices need to re-sync after boot, and lead to a slow response,
  but start-up script for libvirt-bin can only wait 5 cycles, 2 seconds
  wait for each cycle, so it will timed-out after 10s, and exit with
  "1".

  
  [ possible solution ]

  extend the retry times for sockfile waiting, and make it possible to
  change via editing `/etc/default/libvirt-bin` file.

  <please see the patch file as attachment>

  
  [ sysinfo ]

  $ lsb_release -a
  No LSB modules are available.
  Distributor ID: Ubuntu
  Description: Ubuntu 14.04.4 LTS
  Release: 14.04
  Codename: trusty

  $ uname -a
  Linux host2 4.2.0-35-generic #40~14.04.1-Ubuntu SMP Fri Mar 18 16:37:35 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

  
  [ related issue ]

  #1386465 -
  https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/1386465

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