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Description of problem:
The guest will be destroyed abnormally while revert the guest's snapshot which took in "pmsuspended" status
Version-Release number of selected component (if applicable):
kernel-3.10.0-112.el7.x86_64
libvirt-1.1.1-28.el7.x86_64
qemu-kvm-rhev-1.5.3-53.el7.x86_64
How reproducible:
100%
Steps to Reproduce:
1.Prepare a running guest with qemu-guest-agent installed
# virsh list
Id Name State
----------------------------------------------------
2 rhel7 running
2.Do S3 with the guest
# virsh dompmsuspend rhel7 --target mem
Domain rhel7 successfully suspended
[root@rhel6 ~]# virsh list
Id Name State
----------------------------------------------------
2 rhel7 pmsuspended
3.Take the internal snapshot for the guest
#virsh snapshot-create-as rhel7 sp1
Domain snapshot sp1 created
# virsh snapshot-list rhel7
Name Creation Time State
------------------------------------------------------------
sp1 2014-03-18 22:10:19 -0400 pmsuspended
4.Wakeup the guest
#virsh dompmwakeup rhel7
Domain rhel7 successfully woken up
# virsh list
Id Name State
----------------------------------------------------
2 rhel7 running
5.Revert the snapshot for the guest
# virsh list --all
Id Name State
----------------------------------------------------
- rhel7 shut off
# ps aux|grep qemu
root 25663 0.0 0.0 103252 840 pts/0 S+ 22:45 0:00 grep qemu
6.Both rhel7 and rhel6 can hit this issue
Actual results:
The guest was destroyed abnormally while revert the guest's snapshot which took in "pmsuspended" status
Expected results:
If we support take and revert snapshot while guest in pmsuspend status, the guest should be in "pmsuspended" status
in step 5 and shouldn't be destroyed abnormally. if we didn't support take and revert snapshot while guest in pmsuspended
status, it should give a clear error
Additional info:
Snapshots of guests in S3 state don't work well with qemu currently. I've pushed patch to forbid them:
commit 1e833899ce07ac02dadbde75ee0e6747eca1068c
Author: Peter Krempa <pkrempa>
Date: Mon Jul 21 15:48:35 2014 +0200
qemu: snapshot: Forbid taking/reverting snapshots in PMSUSPENDED state
Qemu doesn't currently support them and behaves strangely. Just forbid
them.
v1.2.6-220-g1e83389
This makes libvirt report an error instead of killing the guest.
I can reproduce it with libvirt-1.1.1-28.el7.x86_64
Verify it using the following component
libvirt-1.2.8-10.el7.x86_64
qemu-kvm-rhev-2.1.2-15.el7.x86_64
kernel-3.10.0-212.el7.x86_64
# virsh dompmsuspend vm2 --target mem
Domain vm2 successfully suspended
# virsh list --all
Id Name State
----------------------------------------------------
6 vm2 pmsuspended
# virsh snapshot-create-as vm2 sn1
error: Operation not supported: qemu doesn't support taking snapshots of PMSUSPENDED guests
I can get the same result using qemu-kvm-1.5.3-83.el7.x86_64.
So mark it as verified.
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