3:33 a.m.
The 27/07/11, Eric Blake wrote:
On 07/27/2011 02:37 AM, Nicolas Sebrecht wrote:
>I'm seeing strange behaviour, here. Any guests saved using both
>managedsave and save commands from virsh won't restore at saved state. A
>new full boot sequence happen.
>
>- Tested against libvirt v0.9.1, v0.9.2, v0.9.3-r1 (Gentoo)
>- Confirmed on three different hosts Gentoo amd64 systems.
>- Tested with gentoo and ubuntu guests.
>- Nothing relevant in /var/log/libvirt/libvirt.log or
>/var/log/libvirt/qemu/<dom>.log
>
>The "state file" /var/lib/libvirt/qemu/save/<dom>.save exists and is
>deleted when 'virsh start' is called.
>
>The new boot sequence is confirmed by :
>- VNC console checks
>- previous screen sessions lost
>- uptime
>
>I've open a bug at https://bugs.gentoo.org/show_bug.cgi?id=376333 but
>had no answer.
>
>Any idea on what could happen or how to inspect it?
Does /var/log/libvirt/qemu/<dom>.log show the qemu process getting
started with the -incoming fd:nnn flag? While you claim that
nothing appeared to be relevant in that log, it might actually help
to post a few lines of it for confirmation.
Here is a fresh test. Hostnames are:
nicolas-desktop: my desktop
homer: guest (logged as root)
xenon: host (logged as root)
nicolas@nicolas-desktop> ssh homer.test.lan
root@homer> uptime
10:06:44 up 3 min, 1 user, load average: 0.10, 0.24, 0.11
root@homer> exit
nicolas@nicolas-desktop> ssh xenon.test.lan
xenon ~ # virsh managedsave homer
Domain homer state saved by libvirt
xenon ~ # cd /var/lib/libvirt/qemu/save
xenon save # ls -l
total 195M
-rw------- 1 root root 195M Jul 28 10:08 homer.save
<waiting a bit>
xenon save # virsh start homer
Domain homer started
xenon save # ls -l
total 0
xenon save # exit
nicolas@nicolas-desktop> ssh homer.test.lan
root@homer> uptime
10:22:42 up 0 min, 1 user, load average: 0.00, 0.00, 0.00
root@homer>
nicolas@nicolas-desktop> ssh xenon.test.lan
xenon ~ # tail /var/log/libvirt/qemu/homer.log
2011-07-28 10:03:07.718: shutting down
2011-07-28 10:03:41.103: starting up
LC_ALL=C
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:/opt/bin:/usr/x86_64-pc-linux-gnu/gcc-bin/4.4.5:/root/bin
HOME=/root USER=root QEMU_AUDIO_DRV=none /usr/bin/qemu-kvm -S -M pc-0.11 -enable-kvm -m
512 -smp 2,sockets=2,cores=1,threads=1 -name homer -uuid
90b87fd0-6add-c7c8-e6f8-b8245bae8329 -nodefconfig -nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/homer.monitor,server,nowait -mon
chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -drive
file=/home/piing/libvirt/images/piing/homer.img,if=none,id=drive-virtio-disk0,format=qcow2
-device
virtio-blk-pci,bus=pci.0,multifunction=on,addr=0x5.0x0,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
-drive
file=/root/virtuals/images/piing/homer-lun0.raw,if=none,id=drive-virtio-disk1,format=raw
-device
virtio-blk-pci,bus=pci.0,multifunction=on,addr=0x8.0x0,drive=drive-virtio-disk1,id=virtio-disk1
-drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device
ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev tap,fd=17,id=hostnet0
-device
virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:c3:7b:da,bus=pci.0,multifunction=on,addr=0x4.0x0
-netdev tap,fd=18,id=hostnet1 -device
virtio-net-pci,netdev=hostnet1,id=net1,mac=52:54:00:30:15:24,bus=pci.0,multifunction=on,addr=0x3.0x0
-chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -usb -vnc
127.0.0.1:0 -vga cirrus -incoming fd:13 -device
virtio-balloon-pci,id=balloon0,bus=pci.0,multifunction=on,addr=0x6.0x0
Domain id=19 is tainted: high-privileges
char device redirected to /dev/pts/4
2011-07-28 10:08:11.024: shutting down
2011-07-28 10:22:48.203: starting up
LC_ALL=C
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:/opt/bin:/usr/x86_64-pc-linux-gnu/gcc-bin/4.4.5:/root/bin
HOME=/root USER=root QEMU_AUDIO_DRV=none /usr/bin/qemu-kvm -S -M pc-0.11 -enable-kvm -m
512 -smp 2,sockets=2,cores=1,threads=1 -name homer -uuid
90b87fd0-6add-c7c8-e6f8-b8245bae8329 -nodefconfig -nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/homer.monitor,server,nowait -mon
chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -drive
file=/home/piing/libvirt/images/piing/homer.img,if=none,id=drive-virtio-disk0,format=qcow2
-device
virtio-blk-pci,bus=pci.0,multifunction=on,addr=0x5.0x0,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
-drive
file=/root/virtuals/images/piing/homer-lun0.raw,if=none,id=drive-virtio-disk1,format=raw
-device
virtio-blk-pci,bus=pci.0,multifunction=on,addr=0x8.0x0,drive=drive-virtio-disk1,id=virtio-disk1
-drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device
ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev tap,fd=18,id=hostnet0
-device
virtio-net-pci,netdev=hostnet0,id=net0,mac=52:54:00:c3:7b:da,bus=pci.0,multifunction=on,addr=0x4.0x0
-netdev tap,fd=20,id=hostnet1 -device
virtio-net-pci,netdev=hostnet1,id=net1,mac=52:54:00:30:15:24,bus=pci.0,multifunction=on,addr=0x3.0x0
-chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 -usb -vnc
127.0.0.1:0 -vga cirrus -incoming fd:15 -device
virtio-balloon-pci,id=balloon0,bus=pci.0,multifunction=on,addr=0x6.0x0
Domain id=20 is tainted: high-privileges
char device redirected to /dev/pts/5
xenon ~ #
It's working for me with libvirt 0.9.3 on RHEL 6, so I'm not
sure
what to suggest that you try next.
Yes, I'm pretty sure it works almost always for everybody out there. I suspect
this issue to be somewhat subtle.
Thanks Eric for your help.
--
Nicolas Sebrecht