Re: [Fedora-xen] virt-manager destroying the guest leaves a "ghost" in xend.

[Tim Flink]

On Fri, 14 Oct 2011 21:04:17 +0300
Marko Ristola  wrote:

> 
> Hi Konrad.
> 
> I can easilly repeat a following situation:
> 1. Start up a guest on Virt-Manager. The quest is created via
> virt-manager, Fedora 14, as a network install. 2. Shut it down via
> Virt-Manager's menus. 3. Wait until Xen reports on xend.log:
> "Domain has shutdown: name=fedora14 id=2 reason=poweroff"
> On virt-manager, guest's status remains "Running".
> If I try any operations for the guest, I get a Python exception,
> something like you found, but related to the operation.
> 
> 4. Disconnect from localhost(xen) on Virt-Manager.
> 5. Connect into localhost(xen) on Virt-Manager.
> 6. Now the guest status of fedora14 is "Shutoff".
> 7. Now we can go back to phase 1 and start again.
> 
> So the bug is (on high level) something like: Xen turns off the
> guest, but virt-manager won't get notified, or won't detect, about
> the state change of Xen quest: "Running" -> "Shutoff".
> 
> So my hypothesis on your problem is, that Xen already turned guest's
> power off, and virt-manager didn't notice it. So virt-manager asks
> Xen to do commands which aren't supported for turned off quest.
> 
> Regards,
> Marko Ristola

I really need to be better about communicating the xen related bugs
that I'm filing. Konrad's initial question sounded slightly different
but I never got around to testing with the method that he listed.

Part of this sounds like a virt-manager bug that I filed last week:
 * 746007 - Status of Xen guests is not updated in virt-manager [1]

Interesting note:
 - In this case, status is correct for 'virsh list --all' and 'xm list'
   even though virt-manager isn't showing DomU status correctly

Tim

[1] https://bugzilla.redhat.com/show_bug.cgi?id=746007



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Re: [Fedora-xen] virt-manager destroying the guest leaves a "ghost" in xend.

[Marko Ristola]

Hi Konrad.

I can easilly repeat a following situation:
1. Start up a guest on Virt-Manager. The quest is created via virt-manager, 
Fedora 14, as a network install.
2. Shut it down via Virt-Manager's menus.
3. Wait until Xen reports on xend.log:
"Domain has shutdown: name=fedora14 id=2 reason=poweroff"
On virt-manager, guest's status remains "Running".
If I try any operations for the guest, I get a Python exception,
something like you found, but related to the operation.

4. Disconnect from localhost(xen) on Virt-Manager.
5. Connect into localhost(xen) on Virt-Manager.
6. Now the guest status of fedora14 is "Shutoff".
7. Now we can go back to phase 1 and start again.

So the bug is (on high level) something like: Xen turns off the guest, but 
virt-manager won't
get notified, or won't detect, about the state change of Xen quest: "Running" 
-> "Shutoff".

So my hypothesis on your problem is, that Xen already turned guest's power off,
and virt-manager didn't notice it. So virt-manager asks Xen to do commands 
which aren't
supported for turned off quest.

Regards,
Marko Ristola

On 10/11/2011 01:07 AM, Konrad Rzeszutek Wilk wrote:
> I tried to install a guest and midway during it decided to install something
> else so I stopped the process and killed the guest.
>
> But got an error and xend.log has this:
>
> [2011-10-10 17:42:06 961] DEBUG (XendDomainInfo:1276) 
> XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/51712
> [2011-10-10 17:43:29 961] ERROR (SrvBase:88) Request destroy failed.
> Traceback (most recent call last):
>File "/usr/lib64/python2.7/site-packages/xen/web/SrvBase.py", line 85, in 
> perform
>  return op_method(op, req)
>File "/usr/lib64/python2.7/site-packages/xen/xend/server/SrvDomain.py", 
> line 89, in op_destroy
>  return self.xd.domain_destroy(self.dom.domid)
>File "/usr/lib64/python2.7/site-packages/xen/xend/XendDomain.py", line 
> 1315, in domain_destroy
>  dominfo = self.domain_lookup_nr(domid)
>File "/usr/lib64/python2.7/site-packages/xen/xend/XendDomain.py", line 
> 588, in domain_lookup_nr
>  if int(domid) in self.domains:
> TypeError: int() argument must be a string or a number, not 'NoneType'
>
> and "xm list" tells me
>
> [root@tst006 /]# xm list
> NameID   Mem VCPUs  State   
> Time(s)
> Domain-0 0  3343 2 r-162.2
> F15_test1024 1 0.0
>
>
> Quitting virt-manager and then 'Deleting' the F15_test makes xend finally 
> remove the
> ghost:
>
> [2011-10-10 17:45:27 961] INFO (XendDomain:1126) Domain F15_test 
> (18eaec13-8ed3-ad0c-6473-7947366fce02) deleted.
>
>
> So.. has anybody else hit this?
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> xen mailing list
> xen@lists.fedoraproject.org
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