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Bug 1354238 - auto_dump_path setting in the qemu.conf not work
Summary: auto_dump_path setting in the qemu.conf not work
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 7
Classification: Red Hat
Component: libvirt
Version: 7.3
Hardware: x86_64
OS: Linux
unspecified
unspecified
Target Milestone: rc
: ---
Assignee: Michal Privoznik
QA Contact: Virtualization Bugs
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2016-07-11 03:10 UTC by yafu
Modified: 2016-11-03 18:48 UTC (History)
6 users (show)

Fixed In Version: libvirt-2.0.0-3.el7
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2016-11-03 18:48:37 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2016:2577 0 normal SHIPPED_LIVE Moderate: libvirt security, bug fix, and enhancement update 2016-11-03 12:07:06 UTC

Description yafu 2016-07-11 03:10:16 UTC 
Description of problem:
auto_dump_path setting in the qemu.conf does not work, the auto-dump file will be created in the '/' directory.

Version-Release number of selected component (if applicable):
libvirt-2.0.0-2.el7.x86_64
qemu-kvm-rhev-2.6.0-12.el7.x86_64


How reproducible:
100%

Steps to Reproduce:
1.Check the default setting of the auto_dump_path:
  #cat /etc/libvirt/qemu.conf
    ...
    # When a domain is configured to be auto-dumped when libvirtd receives a
    # watchdog event from qemu guest, libvirtd will save dump files in directory
    # specified by auto_dump_path. Default value is /var/lib/libvirt/qemu/dump
    #
    #auto_dump_path = "/var/lib/libvirt/qemu/dump"
     ...

2.Start a guest with watchdog device:
   #virsh dumpxml rhel7.3
    ...
    <watchdog model='i6300esb' action='dump'>
      <alias name='watchdog0'/>
      <address type='pci' domain='0x0000' bus='0x00' slot='0x0c' function='0x0'/>
    </watchdog>
   ...

3.In guest:
  echo 1 > /dev/watchdog

Actual results:
The auto dump file created in the '/' directory:

Expected results:
The auto dump file created in the default auto_dump_path: /var/lib/libvirt/qemu/dump

Additional info: 
The dump filename is only consists of 'domainid-domainname', so the dump filename is the same for the same guest, it means the dumpfile will be overlapped by the next dump.
Comment 2 Michal Privoznik 2016-07-13 05:25:52 UTC 
Moving to POST:

http://post-office.corp.redhat.com/archives/rhvirt-patches/2016-July/msg00401.html
Comment 4 Fangge Jin 2016-08-08 10:49:37 UTC 
Reproduce this on build libvirt-2.0.0-2.el7.x86_64


Verify this BZ on build libvirt-2.0.0-4.el7.x86_64.

1. Use the default auto_dump_path value, there is core dump file generated in directory /var/lib/libvirt/qemu/dump:

# ll /var/lib/libvirt/qemu/dump/5-rhel7.2-2016-08-08-18:31:44
-rw-------. 1 root root 1182815304 8月   8 18:31 /var/lib/libvirt/qemu/dump/5-rhel7.2-2016-08-08-18:31:44

2. Set auto_dump_path = "/var/lib/libvirt/qemu/dump1" in qemu.conf and restart libvirtd, core dump file can also be generated:

# ll /var/lib/libvirt/qemu/dump1/6-rhel7.2-2016-08-08-18\:42\:30 
-rw-------. 1 root root 1182815304 8月   8 18:42 /var/lib/libvirt/qemu/dump1/6-rhel7.2-2016-08-08-18:42:30
Comment 6 errata-xmlrpc 2016-11-03 18:48:37 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-2016-2577.html
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