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Created attachment 956560[details]
libvirtd back trace file
Description of problem:
when do external disk snapshot with fault gluster network snapshot xml, libvirtd crashed.
The fault xml is generated accidentally, with the right one it could succeed.
Version-Release number of selected component (if applicable):
libvirt-1.2.8-6.el7.x86_64
glusterfs-3.5.2-1.el7.x86_64
qemu-kvm-rhev-2.1.2-6.el7.x86_64
kernel-3.10.0-123.el7.x86_64
How reproducible:
always
Steps to Reproduce:
1. prepare a domain with gluster network disk
# virsh dumpxml virt-tests-vm1
...
<disk type='network' device='disk'>
<driver name='qemu' type='qcow2' cache='none'/>
<source protocol='gluster' name='gluster-vol1/rhel7.img'>
<host name='xx.xx.xx.xx'/>
</source>
<backingStore/>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</disk>
...
# virsh list
Id Name State
----------------------------------------------------
4 virt-tests-vm1 running
2. prepare a fault snapshot xml
# cat /tmp/gluster_snap.xml
<domainsnapshot>
<name>snapshot_test</name>
<description>Snapshot Test</description>
<disks>
<disk name='vda' snapshot='external' type='network'>
<source protocol='gluster' name='gluster-vol1/gluster.qcow2.snap'/>
</disk>
</disks>
</domainsnapshot>
Note:
The <source> element closed without <host/> given
3. do external disk snapshot with the xml
# virsh snapshot-create virt-tests-vm1 /tmp/gluster_snap.xml --disk-only
2014-11-12 05:25:19.353+0000: 14192: info : libvirt version: 1.2.8, package: 6.el7 (Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>, 2014-11-04-08:28:35, x86-020.build.eng.bos.redhat.com)
2014-11-12 05:25:19.353+0000: 14192: warning : virKeepAliveTimerInternal:143 : No response from client 0x7f9784181dd0 after 6 keepalive messages in 35 seconds
error: internal error: received hangup / error event on socket
2014-11-12 05:25:19.354+0000: 14194: warning : virKeepAliveTimerInternal:143 : No response from client 0x7f9784181dd0 after 6 keepalive messages in 35 seconds
error: Failed to reconnect to the hypervisor
Actual results:
libvirtd crashed
Expected results:
no crash
Additional info:
backtrace in attachment
Now pushed:
commit b66288faaba68e22a2876029872ddadf1794bda8
Author: Ján Tomko <jtomko>
CommitDate: 2014-11-12 09:36:31 +0100
Do not crash on gluster snapshots with no host name
virStorageFileBackendGlusterInit did not check nhosts.
https://bugzilla.redhat.com/show_bug.cgi?id=1162974
git describe: v1.2.10-78-gb66288f
Verify this bug with libvirt-1.2.8-9.el7.x86_64, step as comment 0. libvirtd will not crash again and an error show when try to start guest
# virsh snapshot-create rh7 snap.xml --disk-only
error: internal error: Expected exactly 1 host for the gluster volume
So, change this bug to verify status
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