Re: [Xen-users] Xen Configuration questions

[Nico Kadel-Garcia <nkadel@xxxxxxxxx>]

Joseph L. Casale wrote:
> > 1). Is RHEL & Xen ready for prime time?  (is it production ready, will
> > I sleep at night?)
> >     
>   
> > 2). Each Xen instance will have a LUN on the iSCSI.  Should I connect
> > the LUN on Domain0 and then have the DomU load it or  should I have
> > each DomU run iSCSI directly with the SAN?  I want to enable live
> > migrate between the blades.
> >
> > 3). Are there any pre-built Xen 'Appliances' for common things like
> > DNS resolvers?
> >
> > 4). Should I use rsync between the blades to syn the xen configs to I
> > can live migrate guest machines between the blades?
> >
> > My primary concern is #1, if it isn't stable I'll look to VMWare or
> > Virtuozzo.  I have a machine running Virtuozzo already and it works
> > ok,  Would rather run something open though,  Linux has served me well
> > the last 17 years.
> >
> > -Matt
> >     
> I too am curious about these exact questions. I am new to both Linux and Xen 
> though. I can say I have used vmware for these same platforms in your exact 
> scenario with an iSCSI san but am wanting to move to Xen for cost reasons. If 
> you find the answers to these questions off list, kindly update the thread as I 
> am anxiously awaiting direction from experienced users myself :)
>   
I've been using RHEL 5 for Xen servers in production. I don't 
live-migrate right now because I'm not using (or rather, didn't use in 
my last contract) network based Xen images, but I did keep the 
configurations distributed on all the servers for load balancing and 
restoration from backup.
I'm not aware of Xen appliances, but for DNS servers you can use a 
stripped down RHEL with bind and nscd pretty trivially. Stripping an 
RHEL system to bare bones is a pain due to the dependency hel and 
massive overpopulation of the "Basic" installation. Frankly, a 
bare-bones install doesn't even need Perl, but try teaching the RPM 
dependency tree not do that. And try telling an RHEL installer that no, 
you don't *WANT* NIS and PCMCIA and Bluetooth and a bunch of other silly 
things in a Xen environment.
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