Hi,
On Fri, Oct 15, 2021 at 12:04:22AM +0800, Tommy Sway wrote:
> Sometimes, some vm failed to stop it by press the shutdown button on the
> management portal, it will show such message in log: shutdown of vm ***
> failed.
>
>
>
> And I want to know:
>
> 1. why cannot shutdown it normally ?
You should possibly find more information in vdsm.log about why it has
failed.
> 2. what difference between the shutdown and power off ? (For example,
> what are the different signals sent to the QEMU process)
Power off forcibly stops the VM. From the VM point of view it is similar
to pulling out a power cord from bare metal computer.
Shutdown delivers a request to the guest OS (which may or may not
satisfy the request). If you see an error it means there was a problem
communicating the request to the guest. The request is delivered either
using a guest agent (if one is installed) or using an ACPI event.
Hope this helps,
Tomas
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