From mboxrd@z Thu Jan 1 00:00:00 1970 From: Markus Armbruster Subject: Re: Q: How to find own domid or uuid from domU? Date: Thu, 18 May 2006 15:18:28 +0200 Message-ID: <87iro3pj2z.fsf@pike.pond.sub.org> References: <87fyj7ravp.fsf@pike.pond.sub.org> <9c6da8341e7021597b69a4a4d941e993@cl.cam.ac.uk> <877j4jr7gd.fsf@pike.pond.sub.org> <87882c2fef4a6cb52eeb9881d1b4ca4a@cl.cam.ac.uk> <87r72rppv2.fsf@pike.pond.sub.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: In-Reply-To: (Keir Fraser's message of "Thu, 18 May 2006 13:27:35 +0100") List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Keir Fraser Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Keir Fraser writes: > On 18 May 2006, at 11:52, Markus Armbruster wrote: > >>> Why does your guest need to know its ID? >> >> So that managament tools have a way of associating a running domain >> with persistent state such as config files, regardless of where on a >> network the domain is running at any time. > > If it's only management tools looking to obtain info about other > running domains, there's already a dom0_op for querying uuid info. > > Is there any reason a domain needs to know its *own* uuid? It's management tools looking to obtain info about their own domain. Consider a network-enabled stat-gathering, managing, or monitoring tool running on domU. It wants to uniquely identify itself to the peer. IP or MAC can work in some environments, but in others they're ephemeral. UUID would be much better. It's the only thing that known never to change, isn't it?