From: Steve Kemp <steve@steve.org.uk>
Subject: Re: [PATCH] add domain creation/shutdown script execution
	support.
Date: Wed, 7 Mar 2007 09:37:48 +0000
Message-ID: <20070307093748.GA24691@steve.org.uk>
References: <20070306135628.GA14559@steve.org.uk>
	<200703061539.38596.mark.williamson@cl.cam.ac.uk>
	<20070306154939.GA21594@steve.org.uk>
	<200703070050.39420.mark.williamson@cl.cam.ac.uk>
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Cc: Mark Williamson <mark.williamson@cl.cam.ac.uk>

On Wed, Mar 07, 2007 at 12:50:39AM +0000, Mark Williamson wrote:

> In fact, what I really meant was that the only reason I'm not recommending 
> they go in straight away (subject to a bit of clean up) is that it would be 
> nice to avoid changing the basic infrastructure in this area of the tools 
> later on if we want a more general mechanism.

  Understandable.

> I'm really glad you've taken the initiative on this, it has the potential to 
> give us some very powerful functionality quite cheaply.

  I will endeavor to find some free time over the weekend to have a 
 play with the xenstored code, and see if I can watch events from it.
 No promises at all, but if I get anywhere I'll post an update.

  Right now I can use "xenstore-ls" to get a snapshot, and I guess
 I could do that every five seconds or so to be able to detect newly
 created domains, and existing ones which have been shutdown.
 That's not ideal, but for a first pass should let me get something working.

  Downside is I'd probably have to write the daemon in python to
 get it into the core, right?

> There's some information on it in the Wiki.  Essentially it gives you a 
> hierarchical namespace describing the state of the management tools and the 
> domains running.  This namespace is populated by (largely) human-readable 
> name=value pairs.

  Great.

> I'll continue thinking about how best to accomplish it in the meantime...

  :)

> It'll be interesting to see where we can go with this...

  Agreed.

Steve
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