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Generally if you use virsh to restart the virtual machine，it seems to be
able to use some time before shutoff again。

$ date
Thu Dec  6 17:04:41 CST 2012

$ virsh start instance-0000006e
Domain instance-0000006e started

$ virsh list
 Id Name                 State
----------------------------------
158 instance-0000006e    running

/var/log/libvirt/qemu$ sudo tail -f instance-0000006e.log
2012-12-03 06:14:13.488+0000: shutting down
qemu: terminating on signal 15 from pid 1957
2012-12-03 06:14:59.819+0000: starting up
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin
QEMU_AUDIO_DRV=none /usr/bin/kvm -S -M pc-1.0 -cpu
core2duo,+lahf_lm,+aes,+popcnt,+sse4.2,+sse4.1,+cx16,-monitor,-vme
-enable-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name
instance-0000006e -uuid d7798df8-e225-4178-9d0b-f6691d78ce18 -nodefconfig
-nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-0000006e.monitor,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc
base=utc,driftfix=slew -no-kvm-pit-reinjection -no-shutdown -drive
file=/data0/instances/instance-0000006e/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none
-device
virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
-netdev tap,fd=25,id=hostnet0 -device
rtl8139,netdev=hostnet0,id=net0,mac=fa:16:3e:17:ca:dd,bus=pci.0,addr=0x3
-chardev
file,id=charserial0,path=/data0/instances/instance-0000006e/console.log
-device isa-serial,chardev=charserial0,id=serial0 -chardev
pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -usb
-device usb-tablet,id=input0 -vnc 0.0.0.0:2 -k en-us -vga cirrus -incoming
fd:23 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
char device redirected to /dev/pts/27
qemu: terminating on signal 15 from pid 1957
2012-12-04 06:54:27.150+0000: shutting down
2012-12-06 09:02:46.343+0000: starting up
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin
QEMU_AUDIO_DRV=none /usr/bin/kvm -S -M pc-1.0 -cpu
core2duo,+lahf_lm,+aes,+popcnt,+sse4.2,+sse4.1,+cx16,-monitor,-vme
-enable-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name
instance-0000006e -uuid d7798df8-e225-4178-9d0b-f6691d78ce18 -nodefconfig
-nodefaults -chardev
socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-0000006e.monitor,server,nowait
-mon chardev=charmonitor,id=monitor,mode=control -rtc
base=utc,driftfix=slew -no-kvm-pit-reinjection -no-shutdown -drive
file=/data0/instances/instance-0000006e/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none
-device
virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1
-netdev tap,fd=23,id=hostnet0 -device
rtl8139,netdev=hostnet0,id=net0,mac=fa:16:3e:17:ca:dd,bus=pci.0,addr=0x3
-chardev
file,id=charserial0,path=/data0/instances/instance-0000006e/console.log
-device isa-serial,chardev=charserial0,id=serial0 -chardev
pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -usb
-device usb-tablet,id=input0 -vnc 0.0.0.0:2 -k en-us -vga cirrus -device
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5
char device redirected to /dev/pts/30

We can see this two log：
...
2012-12-03 06:14:59.819+0000: starting up
...
2012-12-04 06:54:27.150+0000: shutting down

The vm shutoff after running one day.


2012/12/6 Veera Reddy <veeraready at gmail.com>

>
>
> On Thu, Dec 6, 2012 at 8:29 AM, pyw <pengyuwei at gmail.com> wrote:
>
>> instance-00000040    shut off
>
>
>
>
> Hi,
>
> Try to start vm with virsh command
>
> " virsh start  instance-00000040"
>
> With this  we can see what is actual problem
>
> Regards,
> Veera.
>
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