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Bug 1159227 - lxc domain startup is slow
Summary: lxc domain startup is slow
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: libvirt
Version: 7.1
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Ján Tomko
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2014-10-31 09:20 UTC by Ján Tomko
Modified: 2015-03-05 07:46 UTC (History)
5 users (show)

Fixed In Version: libvirt-1.2.8-6.el7
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-03-05 07:46:41 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2015:0323 0 normal SHIPPED_LIVE Low: libvirt security, bug fix, and enhancement update 2015-03-05 12:10:54 UTC

Description Ján Tomko 2014-10-31 09:20:29 UTC 
Description of problem:
lxc domain startup is slow

Version-Release number of selected component (if applicable):
libvirt-1.2.8-5.el7.x86_64

How reproducible:
1000 ‰

Steps to Reproduce:
1. Have an LXC domain:
<domain type='lxc'>
  <name>test</name>
  <memory unit='KiB'>1048576</memory>
  <os>
    <type arch='x86_64'>exe</type>
    <init>/bin/sh</init>
  </os>
  <devices>
    <emulator>/usr/libexec/libvirt_lxc</emulator>
    <console/>
  </devices>
</domain>

2. virsh -c lxc:/// start test --console

Actual results:
Shell prompt appears after 30 seconds.

Expected results:
Shell prompt appears immediately.
Comment 1 Ján Tomko 2014-10-31 09:29:23 UTC 
Upstream patch:
https://www.redhat.com/archives/libvir-list/2014-October/msg01102.html
Comment 2 Ján Tomko 2014-11-04 12:46:55 UTC 
Now pushed upstream:
commit 7ead1a5d91a93b5614deeef7b0227bffcea9740d
Author:     Ján Tomko <jtomko>
CommitDate: 2014-11-04 13:40:45 +0100

    Do not probe for power mgmt capabilities in lxc emulator
    
    It fails after 30 seconds with this error:
    error : virDBusCall:1429 : error from service: CanSuspend:
    Did not receive a reply. Possible causes include: the remote
    application did not send a reply, the message bus security
    policy blocked the reply, the reply timeout expired, or the
    network connection was broken.
    
    Only probe for the power mgmt capabilities when driver is non-NULL.
    This speeds up domain startup by 30 seconds.
    
    https://bugzilla.redhat.com/show_bug.cgi?id=1159227

git describe: v1.2.10-16-g7ead1a5
Comment 5 Yang Yang 2014-11-12 02:06:17 UTC 
Verify it with libvirt-1.2.8-6.el7.x86_64

# cat lxc.xml 
<domain type='lxc'>
  <name>lxc-test</name>
  <memory unit='KiB'>1048576</memory>
  <currentMemory unit='KiB'>1048576</currentMemory>
  <vcpu placement='static'>1</vcpu>
  <os>
    <type arch='x86_64'>exe</type>
<init>/bin/sh</init>  
</os>
  <clock offset='utc'>
    <timer name='rtc' tickpolicy='catchup'/>
    <timer name='pit' tickpolicy='delay'/>
    <timer name='hpet' present='no'/>
  </clock>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>restart</on_crash>
  <devices>
    <emulator>/usr/libexec/libvirt_lxc</emulator>
    <interface type='network'>
      <mac address='52:54:00:8f:13:eb'/>
      <source network='default'/>
    </interface>
<console type='pty'/>
  </devices>
</domain>

# virsh -c lxc:/// define lxc.xml 
Domain lxc-test defined from lxc.xml

# time virsh -c lxc:/// start lxc-test
Domain lxc-test started


real	0m0.413s
user	0m0.015s
sys	0m0.006s

As lxc startup is not slow again, mark it as verified
Comment 7 errata-xmlrpc 2015-03-05 07:46:41 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHSA-2015-0323.html
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