Re: [Xen-users] Does XEN support crash carts?

[Steffen Hulegaard <shulegaa@xxxxxxxxx>]

    Clearly, I'm a newbie.  Thanks for the tip
on crash cart support (via 'xm console').  
It really helped - but I'm left with a nagging 
(newbie) KVM question.  I'd also love to confirm 
my newfound serial-port understanding.     

     I now see how to configure support for 
the physical serial port (i.e. see section 2.5.2 at
http://tx.downloads.xensource.com/downloads/docs/user/).

     It seems easy enough to 'switch' between 
domains/guests using the escape character 
mentioned.  Once the serial connection is set/switched
to be talking to domain0, I can see using a 
'xm consoles' - or 'xm lists' - command to 
discover/choose active domain IDs.  So everything
looks 
fine via the crash cart's null modem cable (to/from 
the physical serial port).  Right?  
Much goodness ;-)  Is there anything missing?  
Maybe a listing of archived/saved VM images?

     I just cannot seem to get my head around what 
is happening on the physical VGA/USB ports. 
What happens to these when one issues an 'xm console'
command (in/to Domain0)?  

     I wonder.  As the serial--dev/console/--dev/ttyS0
of each domain gets 'switched', is the
monitor--virtual-framebuffer association *also* 
getting switched onto/off-of the physical VGA port?
Are the virtual keyboards/mice of each domain 
*switched* - right along with the serial-port/console 
and the virtual framebuffer?  If so ... well then ... 
more goodness ;-)

     I really appreciate the clarification.  I 
apologize for being such a newbie :-(  I've heard 
some claims about there being some sort of 
XEN limitation/deficiency here (and I've got 
some limitations on what I can presently just try 
myself).  At any rate, the premise that XEN v3.x
lacks any 'crash cart' support sounds like a myth.  
Maybe this is just an out-of-date notion.  

Thanks for all the help.  


--- Jayson Vantuyl <jvantuyl@xxxxxxxxxxxxxx> wrote:

> This is what I do.
> 
> On Mar 7, 2007, at 1:26 PM, Foreman, Tim wrote:
> 
> > I'm kind of a newbie to Xen, but can't you just
> log into
> > the Dom0 host - the physical box running Xen -
> through the serial
> > port, or the crash cart KVM, and then connect to
> the DomU guest
> > consoles using 'xm console DOMAIN'?
> >
> > --
> > Timothy W. Foreman ~ Security Administrator ~
> tforeman@xxxxxxxxx
> > (651) 365-4181     ~ Internet Broadcasting  ~
> www.ibsys.com
> > --
> > The Onion: Have you decided what you want to be
> when you grow up?
> > Berkeley Breathed: Dad. The rest is frosting.
> 
> -- 
> Jayson Vantuyl
> Systems Architect
> Engine Yard
> jvantuyl@xxxxxxxxxxxxxx
> 
> 
> 



 
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