Open Stack

Poncho would be my nomination for best project name, although Ironic deserves a special award also..

 

Looks very interesting .

 

Tim

 

From: Narayan Desai [mailto:narayan.desai at gmail.com] 
Sent: 16 May 2013 22:52
To: Tim Bell
Cc: openstack-operators at lists.openstack.org; Scott Devoid; Lorin Hochstein
Subject: Re: [Openstack-operators] Graceful VM shutdown

 

We (Scott Devoid, Lorin Hochstein, and myself) have built something to help with this class of problem, and submitted a paper to
LISA about it. The paper is still under review, but the code is already up on github. We'd love feedback on the code or approach. 

 

Our basic goal here was to start working with a user-annotated approach for load-shedding, which will open the door to a bunch of
really interesting resource management techniques and reducing the impact of basic system operations tasks.

 

The code is called poncho (since we needed it to deal with our "full cloud" ;) and is available here:

https://github.com/magellancloud/poncho

 

It is definitely still under development, but we hope that it will prove out the concepts before we try to build a version that
would be suitable for integration into openstack.

 

I've attached a preprint of the paper to this mail.

 -nld

 

 

 

On Thu, May 16, 2013 at 1:02 PM, Tim Bell <Tim.Bell at cern.ch <mailto:Tim.Bell at cern.ch> > wrote:

 

I am interested to see how other service providers handle the cases where there is a need to reboot a hypervisor but it is planned
(such as a reboot after OS patching).

 

We do not want to do live or block migration for these cases as there is no shared storage and block migration can be a bit
unreliable at times.

 

In my ideal case, we would be able to warn the VMs in some way so they can do a reasonable job of shutting down. In some cases, our
users would like many minutes of notice to complete their current transaction.

 

Does anyone know of a standard mechanism for hypervisor communicating to the guest to warn of an impending shutdown ?

 

Tim

 


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