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Re: [libvirt] domain shutdown requests



At 09/16/2011 09:36 AM, Christian Benvenuti (benve) Write:
>> -----Original Message-----
>> From: Wen Congyang [mailto:wency cn fujitsu com]
>> Sent: Thursday, September 15, 2011 6:22 PM
>> To: Christian Benvenuti (benve)
>> Cc: Libvirt
>> Subject: Re: [libvirt] domain shutdown requests
>>
>> At 09/16/2011 05:10 AM, Christian Benvenuti (benve) Write:
>>> When you shutdown a domain that is in PAUSED state, the shutdown
> will
>>> not
>>> take effect until you issue a resume cmd:
>>>
>>> # virsh suspend <domain_name>
>>>
>>>   <domain_name> is now PAUSED
>>>
>>> # virsh shutdown <domain_name>
>>>
>>>   <domain_name> does not shutdown, with the reason being that, for
>>>   example in the case of a Linux Guest, the guest is not running and
>>>   therefore there is no acpid running and able to process the
>> shutdown
>>>   request. Right?
>>>
>>> If now we issue a resume
>>>
>>> #virsh resume <domain_name>
>>>
>>>   the guest initiates the (pending) shutdown (ie, acpid processes
> the
>>>   pending request).
>>
>> I test it, and the guest is not shutdown after I resume the guest.
> 
> I (re)tested it with 0.9.4 and it does shutdown.

The bevaior does not depend libvirt. It depends qemu.
What is the version of qemu that you used?

Thanks
Wen Congyang.

> 
>>> Is this the expected behavior?
>>>
>>> Shouldn't virsh do something like this when it issues a shutdown
>>> request?
>>>
>>>   if (domain.state == PAUSED)
>>>     resume(domain)
>>>
>>>   shutdown(domain)
>>>
>>> If yes, then I guess this logic should go
>>> - into the cmdShutdown routine if we want to make it available to
>> virsh
>>> only,
>>> or
>>> - inside the driver's domainShutdown fn if we want to make it
>> available
>>> to any
>>>   libvirt user.
>>>
>>> One more minor comment.
>>> As of now, "virsh list" (or 'virsh domstate <domain>') does not
>> provide
>>> any way of
>>> knowing if
>>> - a domain is being shutdown
>>> or
>>> - a domain has a pending shutdown request (like in the example
>> above).
>>>
>>> Would it make any sense to enhance the output of list/domstate , for
>>> example to
>>> show something like this when libvirt issues a shutdown to a running
>>> domain
>>>
>>>  Id Name                 State
>>> ----------------------------------
>>>   3 FC15-2               running (shutdown in progress)
>>>
>>> Or something like this when it issues a shutdown to a PAUSED domain?
>>>
>>> Id Name                 State
>>> ----------------------------------
>>>   3 FC15-2               PAUSED (shutdown request pending)
>>
>> The request is not pended...
> 
> In my test it is: as soon as I do "resume", the guest initiates the
> shutdown.
> 
>> I perfer to resume the guest before shutdown it in ther driver.
> 
> In  this case the shutdown command should return something like 
>   
>     "Domain XXX is in PAUSED state. You need to resume it first..."
> 
> instead of
> 
>     "Domain XXX is being shutdown".
> 
> /Chris
>  
>> Thanks
>> Wen Congyang
>>
>>>
>>> Thanks
>>> /Chris
>>>
>>>
>>>
>>> --
>>> libvir-list mailing list
>>> libvir-list redhat com
>>> https://www.redhat.com/mailman/listinfo/libvir-list
>>>
> 
> 


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