How to properly turn off guest VM on server shutdown?

Hi,

is there a mechanism inside qemu-kvm that can shutdown the OS inside a VM when the qemu-kvm process receives a kill signal?
I am running Windows7 Pro inside a VM and I would like kvm to shut the Windows system down before the process is killed.
I know that VMware can shut down the guest OS when stopping the VMware instance. Is there a similar feature in KVM?

But also it would interest to me to know if this can be done without using libvirt.

Quoted 2 lines · Daniel Bareiro

But also it would interest to me to know if this can be done without using libvirt.

Well, it can, but you get to duplicate all the libvirt code that does this.

But the origin of the question here is probably, can something automatically shut down guests when a machine shutdowns down via the normal mechanism. AFAIK, libvirt does not support this today although there are some scripts floating around the intertubes that can drive this operation through libvirt.

Hi, Anthony.

Quoted 5 lines · Anthony Liguori

But the origin of the question here is probably, can something automatically shut down guests when a machine shutdowns down via the normal mechanism. AFAIK, libvirt does not support this today although there are some scripts floating around the intertubes that can drive this operation through libvirt.

Well.. perhaps I'm confused because I did these tests a long time ago. But now that you mention it, I believe that I had tried was that, through virsh commands, the VM shutdown could be done from the VMHost being it always running.

I suppose that scripts that you mention will call to virsh when shutdown becomes of the VMHost.

Regards,
Daniel

Hi!

Does anyone have sample scripts for this job?

Quoted 1 line · Markus Breitländer

Hi!

Hello;

Quoted 1 line

Does anyone have sample scripts for this job?

#!/bin/bash
CONNECT_STRING="qemu:///system"
for MACHINE in $(virsh -c "$CONNECT_STRING" list | awk '/running$/ {print $2}') ; do
virsh -c "$CONNECT_STRING" shutdown $MACHINE
done
sleep 600

This code will shutdown all runnning hosts with acpi en enabled. I haven't tested it under windows Seven, but under win 2003, you have modify:

* Using regedit the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows
NT\CurrentVersion\Windows and set the value "ShutdownWarningDialogTimeout" to dword:00000001 (this will force shutdown even if users are connected)

AND

* Goto Control Pannel, admin tools and double-click "Local security settings"
* Expand "Local policies" and click on "Security Options" (left window pan)
* On the right side, locate "Shutdown: Allow system to be shutdown..." and
enable the option(this allows to powerdown on ctr-alt-del screen".

HTH

Hello Glennie,

Am 26.01.2010 14:46, schrieb Glennie Vignarajah:

Quoted 28 lines

Quoted 1 line · Markus Breitländer

Hi!

Hello;

Quoted 1 line

Does anyone have sample scripts for this job?

#!/bin/bash
CONNECT_STRING="qemu:///system"
for MACHINE in $(virsh -c "$CONNECT_STRING" list | awk '/running$/ {print $2}') ; do
  virsh -c "$CONNECT_STRING" shutdown $MACHINE
done
sleep 600

This code will shutdown all runnning hosts with acpi en enabled. I haven't tested it under windows Seven, but under win 2003, you have modify:

 * Using regedit the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows and set the value "ShutdownWarningDialogTimeout" to dword:00000001 (this will force shutdown even if users are connected)

AND

Quoted 6 lines

 * Goto Control Pannel, admin tools and double-click "Local security settings"
 * Expand "Local policies" and click on "Security Options" (left window pan)
 * On the right side, locate "Shutdown: Allow system to be shutdown..." and enable the option(this allows to powerdown on ctr-alt-del screen".

HTH

I was thinking about a script that doesn't use virsh.

Anthony Liguori <[email protected]>
But the origin of the question here is probably, can something automatically shut down guests when a machine shutdowns down via the normal mechanism. AFAIK, libvirt does not support this today although there are some scripts floating around the intertubes that can drive this operation through libvirt.

Quoted 5 lines

But the origin of the question here is probably, can something automatically shut down guests when a machine shutdowns down via the normal mechanism. AFAIK, libvirt does not support this today although there are some scripts floating around the intertubes that can drive this operation through libvirt.

Does the 'system_powerdown' monitor command initiate an ACPI shutdown? If so, I guess you can make an rc.d script that calls it during shutdown?

Quoted 3 lines

Does the 'system_powerdown' monitor command initiate an ACPI shutdown? If so, I guess you can make an rc.d script that calls it during shutdown?

Interesting... I didn't know this command of Qemu Monitor.

Doing a test being connected to one of my guest by serial console, I see that when executing the command from Qemu Monitor, guest does a normal shutdown. But for this I believe that acpi package (Debian) must be installed.

[email protected] wrote on 01/24/2010 05:29:08 PM:

Quoted 7 lines

Anthony Liguori <[email protected]>
But the origin of the question here is probably, can something automatically shut down guests when a machine shutdowns down via the normal mechanism. AFAIK, libvirt does not support this today although there are some scripts floating around the intertubes that can drive this operation through libvirt.

Does the 'system_powerdown' monitor command initiate an ACPI shutdown? If so, I guess you can make an rc.d script that calls it during shutdown?

Avishay

--
To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html

Maybe the same can be done with windows guest.

Quoted 1 line · Jean-Philippe Menil

Maybe the same can be done with windows guest.

Should work with any Windows, and verified to work with Vista x64 guest.

Quoted 5 lines · Jernej Simončič

Quoted 1 line · Jean-Philippe Menil

Maybe the same can be done with windows guest.

Should work with any Windows, and verified to work with Vista x64 guest.

The only problem is that windows does not want to shut down when you need it.

All versions of windows server requires enabling something in the registry - to notice the "power down" events to start with.

If a windows machine is used by someone else (open files, logged in user etc), it brings a dialog box in response to "power down" event asking if you _really_ want to shut down since this machine is used over network.

And finally, quite often during screensaver "work" windows notices the "power down" event only after some other event such as mouse move or a keypress.

In order to shut down my windows guests I come to this version:

  {
    # moving mouse helps windows (xp) to notice the powerdown event
    echo mouse_move 1 1
    sleep .1
    echo system_powerdown
    sleep 1
    # also for windows, if it asks "ok to shutdown if in use?"
    echo sendkey ret
    sleep .1
  } | \
    nc -U -w2 -q2 $run/$name/mon > /dev/null

That's netcat connecting to the guest's monitor which is a unix socket.

The script performs similar task for all guests in first cycle, next it repeats the procedure but now waits for $max_guest_waittime, which should be sufficient for any guest to shut down. If the guest did not shut down in time, the script simple kills the guest.

Note that "sleep 1" in the above is not necessary sufficient, as (windows) guest might be in swap and might need some time to draw the dialog box.