RE: [Xen-devel] RE: How to simply automatically resume suspended Xendmanaged domains on Xend start in Xen 3.2.1

["Artur Linhart - Linux communication" <AL.LINUX@xxxxxxxxxxx>]

Hello,

        I have tried to implement the new option(s) for the on_xend_start
and it looks so it could work - at least it works for me well :-)

        I changed in XendDomain.py the method autostart_domains - the
original source code in attachment XendDomain.py.autostart_domains.original
has been changed into the modified source code in attachment
XendDomain.py.autostart_domains.modified

        The given code adds two additional options for the DomU
configuration parameter 'on_xend_start'
They are named 
'resume' - the suspended domain is resumed, but if it is not suspended, then
it will not be started automatically
'start_or_resume' - if the domain is halted it will be started and if it is
suspended it will be resumed automatically.

        Of course I do not know if it is enough so, but for me it works
without problems. I hope this contribution (or some other necessary
modifications of it) could be included into the standard version of Xen...

        With regards, Archie

________________________________________
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Artur Linhart -
Linux communication
Sent: Thursday, September 04, 2008 5:40 PM
To: xen-users@xxxxxxxxxxxxxxxxxxx; xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] RE: How to simply automatically resume suspended
Xendmanaged domains on Xend start in Xen 3.2.1

Hello,

            I have looked into the XendDomain.py and there in the method
"autostart_domains" is really no handling of the automatical resume of the
xen domains, which have been suspended on xend stop. Is there any other way
how to simply make it? I think, this would be a usefull feature to have it,
if the "on_xend_end" already supports the "suspend" option. It looks the
implementation of such a function could be relatively easy...

            With best regards

                        Artur


________________________________________
From: Artur Linhart - Linux communication [mailto:AL.LINUX@xxxxxxxxxxx] 
Sent: Thursday, September 04, 2008 10:12 AM
To: 'xen-users@xxxxxxxxxxxxxxxxxxx'
Subject: How to simply automaticall resume suspended Xend managed domains on
Xend start in Xen 3.2.1

Hello,

            I try to configure the automatic suspension of some domains by
the end of Xend (especially older hvm domains with windows which cannot
react on the shutdown signal). If I write into the domain configuration file
the lines 

on_xend_start = 'start'
on_xend_stop = 'shutdown'

if works well with the linux domains, the domain is shut down on xend stop
and started with xend start.

Also if specifying 

on_xend_stop = 'suspend'

works well now (the snapshot did not work till I did not applied the patch
mentioned in
http://xen.markmail.org/search/?q=xend+suspend+problems#query:xend%20suspend
%20problems+page:1+mid:6bnxrk4eoonnyuyy+state:results 
- before the snapshot has not been created correctly) - the memory snapshot
is created in some instance's subdirectory of the directory
/var/lib/xend/domains after xend is stopped like by explicite call of xm
suspend command.

Is there any way how to resume such a suspended domain on xend start?
If specifying
on_xend_start = 'start'
on_xend_stop = 'suspend'
then the domain is not resumed, I have tried also 

on_xend_start = 'resume'
on_xend_stop = 'suspend'
(resume is not documented if starting xm create --help_config, but I have
tried it) - but also without success... is there some way how to bring xend
to the resume of the suspended domains automatically, or do I have to write
my own scripts for it?

With regards,    

            Archie




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Attachment: XendDomain.py.autostart_domain.original
Description: Binary data

Attachment: XendDomain.py.autostart_domain.modified
Description: Binary data

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