Xen users - Oct 2008 - VNC access console of paravirtualised DomU

Hi,

I''ve seen this asked a few times, but I just can''t work out
whether I am misinterpreting how this is supposed to work, or if it is just
broken in my setup.

What I want is to be able to see the character cell console of DomU''s
via VNC. As far as I understand, when I create/startup the DomU, then a vnc
server should start listening on my Dom0. I have tried every combination of
VNC=1, VNCVIEWER=0 in my config file but at no point do I get a VNC port being
opened for listening on the Dom0. Dom0 is Hardy Heron, DomU''s are
Centos 5.2 and Hardy. All the Xen kernel and tools were as was provided by the
repositories. When I was trying this a while ago with Centos 5.1 as the Dom0, I
was using virtual machine manager which seemed to give me a colourful
representation of the console/, which I assume now was over VNC. I
haven''t got that setup anymore to reference, alas and
virtual-machine-manager seems broken on Hardy, afa I can tell.

So, am I missing something or is it supposed to work the way I described? If so,
what should I have in my config files/sxp to make it work?

Thanks in advance and be gentle with me because I am a noob Xen user!

Ian.



      

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>So, am I missing something or is it supposed to work the way I described? If
so, what should I have in my config files/sxp to make it work?
Check your xend-config.sxp for (vnc-listen '127.0.0.1') and also your vm
config for vnclisten="127.0.0.1". The xend-config.sxp comments detail
its
usage. I like to comment it out there and set it per vm config as I need.

HTH,
jlc

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--- On Sun, 10/26/08, Ian Murray <murrayie@yahoo.co.uk> wrote:
From: Ian Murray <murrayie@yahoo.co.uk>
Subject: [Xen-users] VNC  access console of paravirtualised DomU
To: xen-users@lists.xensource.com
Date: Sunday, October 26, 2008, 7:49 AM

Hi,

I''ve seen this asked a few times, but I just can''t work out
whether I am misinterpreting how this is supposed to work, or if it is just
broken in my setup.

What I want is to be able to see the character cell console of DomU''s
via VNC. As far as I understand, when I create/startup the DomU, then a vnc
server should start listening on my Dom0. I have tried every combination of
VNC=1, VNCVIEWER=0 in my config file but at no point do I get a VNC port being
opened for listening on the Dom0. Dom0 is Hardy Heron, DomU''s are
Centos 5.2 and Hardy.
***********************************************************
At CentOS 5.2 DomU vfb works fine:-

http://bderzhavets.wordpress.com/2008/10/20/pygrub-install-centos-52-pv-domu-at-xen-32-ubuntu-hardy-dom0-via-local-http-server-all-64-bit/

View:-
http://blog.bashton.com/2008/running-an-ubuntu-hardy-xen-domu-under-a-centos-dom0/Personally,
i failed when followed link above to get graphical login via vfb
as advised above and just set it up in Hardy DomU:-

http://bderzhavets.blogspot.com/2008/10/install-ubuntu-hardy-pv-domu-vnc-at.html
**********************************************************
All the Xen kernel and tools were as was provided by the repositories. When I
was trying this a while ago with Centos 5.1 as the Dom0, I was using virtual
machine manager which seemed to give me a colourful representation of the
console/,
 which I assume now was over VNC. I haven''t got that setup anymore to
reference, alas and virtual-machine-manager seems broken on Hardy, afa I can
tell.

So, am I missing something or is it supposed to work the way I described? If so,
what should I have in my config files/sxp to make it work?

Thanks in advance and be gentle with me because I am a noob Xen user!

Ian. 





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Thanks for all the answers. I got it working eventually by setting up a CentOS
installation on a USB drive. I setup CentOS DomU with virtual machine manager
(other than that was the same as the DomU on the Dom0 Ubuntu). I did a
comparison of what it was doing compared with my Ubuntu Dom0 generated CentOS
DomU.



Things I was missing were:-

vfb = [ "type=vnc,vncunused=1" ] in the config file

At this point VNC started to listen but just gave a black screen when vncviewer
was launched.

In my grub.conf there was a "console=xvc" line or similar which was
stopping the boot messages appearing in the VNC console.

Now I could boot and read the boot messages in VNC (and xm console!) but no
login prompt.

Lastly, I re-enabled the line for in inittab for tty01, as I noticed that it was
commented out in the DomU I created in using "xm console", which
allowed to

So at this point both DomU''s were behaving the same way. I went back to
Ubuntu and applied the fixes and then (apart from some odd colouring) it all
seemed to work okay.

Was a bit disappointed that I couldn''t see the pyGRUB output, but I am
guessing that may be impossible otherwise CentOS would be doing it out the box.

Thanks again.

   


________________________________
From: Boris Derzhavets <bderzhavets@yahoo.com>
To: xen-users@lists.xensource.com; Ian Murray <murrayie@yahoo.co.uk>
Sent: Monday, 27 October, 2008 6:11:19
Subject: Re: [Xen-users] VNC  access console of paravirtualised DomU




--- On Sun, 10/26/08, Ian Murray <murrayie@yahoo.co.uk> wrote:

From: Ian Murray <murrayie@yahoo.co.uk>
Subject: [Xen-users] VNC  access console of paravirtualised DomU
To: xen-users@lists.xensource.com
Date: Sunday, October 26, 2008, 7:49 AM


Hi,

I''ve seen this asked a few times, but I just can''t work out
whether I am misinterpreting how this is supposed to work, or if it is just
broken in my setup.

What I want is to be able to see the character cell console of DomU''s
via VNC. As far as I understand, when I create/startup the DomU, then a vnc
server should start listening on my Dom0. I have tried every combination of
VNC=1, VNCVIEWER=0 in my config file but at no point do I get a VNC port being
opened for listening on the Dom0. Dom0 is Hardy Heron, DomU''s are
Centos 5.2 and Hardy.
***********************************************************
At CentOS 5.2 DomU vfb works fine:-

http://bderzhavets.wordpress.com/2008/10/20/pygrub-install-centos-52-pv-domu-at-xen-32-ubuntu-hardy-dom0-via-local-http-server-all-64-bit/

View:-

http://blog.bashton.com/2008/running-an-ubuntu-hardy-xen-domu-under-a-centos-dom0/Personally,
i failed when followed link above to get graphical login via vfb
as advised above and just set it up in Hardy DomU:-

http://bderzhavets.blogspot.com/2008/10/install-ubuntu-hardy-pv-domu-vnc-at.html
**********************************************************
All the Xen kernel and tools were as was provided by the repositories. When I
was trying this a while ago with Centos 5.1 as the Dom0, I was using virtual
machine manager which seemed to give me a colourful representation of the
console/, which I assume now was over VNC. I haven''t got that setup
anymore to reference, alas and virtual-machine-manager seems broken on Hardy,
afa I can tell.

So, am I missing something or is it supposed to work the way I described? If so,
what should I have in my config files/sxp to make it work?

Thanks in advance and be gentle with me because I am a noob Xen user!

Ian. 


_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users 


      

_______________________________________________
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Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

I was trying the a debootstrapped hardy DomU and had to  do this stuff to the
ramdisk, so thanks again for this.

One thing for sure is that I wouldn''t have got there on my own!!




________________________________
From: Boris Derzhavets <bderzhavets@yahoo.com>
To: xen-users@lists.xensource.com; Ian Murray <murrayie@yahoo.co.uk>
Sent: Monday, 27 October, 2008 6:11:19
Subject: Re: [Xen-users] VNC  access console of paravirtualised DomU




--- On Sun, 10/26/08, Ian Murray <murrayie@yahoo.co.uk> wrote:

From: Ian Murray <murrayie@yahoo.co.uk>
Subject: [Xen-users] VNC  access console of paravirtualised DomU
To: xen-users@lists.xensource.com
Date: Sunday, October 26, 2008, 7:49 AM


Hi,

I''ve seen this asked a few times, but I just can''t work out
whether I am misinterpreting how this is supposed to work, or if it is just
broken in my setup.

What I want is to be able to see the character cell console of DomU''s
via VNC. As far as I understand, when I create/startup the DomU, then a vnc
server should start listening on my Dom0. I have tried every combination of
VNC=1, VNCVIEWER=0 in my config file but at no point do I get a VNC port being
opened for listening on the Dom0. Dom0 is Hardy Heron, DomU''s are
Centos 5.2 and Hardy.
***********************************************************
At CentOS 5.2 DomU vfb works fine:-

http://bderzhavets.wordpress.com/2008/10/20/pygrub-install-centos-52-pv-domu-at-xen-32-ubuntu-hardy-dom0-via-local-http-server-all-64-bit/

View:-

http://blog.bashton.com/2008/running-an-ubuntu-hardy-xen-domu-under-a-centos-dom0/Personally,
i failed when followed link above to get graphical login via vfb
as advised above and just set it up in Hardy DomU:-

http://bderzhavets.blogspot.com/2008/10/install-ubuntu-hardy-pv-domu-vnc-at.html
**********************************************************
All the Xen kernel and tools were as was provided by the repositories. When I
was trying this a while ago with Centos 5.1 as the Dom0, I was using virtual
machine manager which seemed to give me a colourful representation of the
console/, which I assume now was over VNC. I haven''t got that setup
anymore to reference, alas and virtual-machine-manager seems broken on Hardy,
afa I can tell.

So, am I missing something or is it supposed to work the way I described? If so,
what should I have in my config files/sxp to make it work?

Thanks in advance and be gentle with me because I am a noob Xen user!

Ian. 


_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users 



      

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Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

I''ve recently installed Ubuntu Intrepid Server PV DomU at Xen 3.3
CentOS 5.2 Dom0. Details here (if needed) :-
http://lxer.com/module/newswire/view/111103/index.html
Running Synaptic Manager at DomU i''ve noticed packages mentioned above
as available
for install . I don''t intend install ubuntu-xen-server on DomU , but
Ubuntu Intrepid Server running on bare metal will potentially allow (?)  to
install ubuntu-xen-server
( with all dependent packages).
Per recent message from Todd Deshane,  i''ve learned , that there is no
option to install
Xen 3.3 on Ubuntu Intrepid Server to create  Dom0, unless to make a port on your
own :) Apparently  a couple of months is not enough for forward porting Xen 3.3
to intrepid kernel, but i am still confused about packages in Synaptic. What
they are supposed to serve ?




      

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On Thu, Oct 30, 2008 at 5:06 PM, Boris Derzhavets <bderzhavets@yahoo.com>
wrote:
> I''ve recently installed Ubuntu Intrepid Server PV DomU at Xen 3.3
CentOS 5.2
> Dom0. Details here (if needed) :-
> http://lxer.com/module/newswire/view/111103/index.html
> Running Synaptic Manager at DomU i''ve noticed packages mentioned
above as
> available
> for install . I don''t intend install ubuntu-xen-server on DomU ,
but Ubuntu
> Intrepid Server running on bare metal will potentially allow (?)  to
install
> ubuntu-xen-server
> ( with all dependent packages).
> Per recent message from Todd Deshane,  i''ve learned , that there
is no
> option to install
> Xen 3.3 on Ubuntu Intrepid Server to create  Dom0, unless to make a port on
> your own :) Apparently  a couple of months is not enough for forward
porting
> Xen 3.3 to intrepid kernel, but i am still confused about packages in
> Synaptic. What they are supposed to serve ?
>
Just to clarify, Intrepid apparently does have Xen 3.3 hypervisor support.
http://packages.ubuntu.com/intrepid/ubuntu-xen-server

The dom0 kernel, just like with Fedora 9,10, is missing from Intrepid as
both Fedora and Ubuntu decided to wait for upstream linux xen support [1,2]
in order for them to again include a dom0 kernel. A pv_ops-based dom0
kernel should soon be supported by the xen developers and be put into
mainline Linux

[1] http://wiki.xensource.com/xenwiki/XenParavirtOps
[2] http://xenbits.xensource.com/paravirt_ops/patches.hg

Cheers,
Todd

-- 
Todd Deshane
http://todddeshane.net
http://runningxen.com

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   Sorry, for stupid question. Are you saying that install ubuntu-xen-server on
Itrepid Server will bring to system xen-3.3.gz
,vmlinuz-2.6.18.8-xen,initrd-2.6.18.8-xen.img ?
   In other words, would it work like cloning via "hg" Xen 3.3
repository to local host and making xen build with 2.6.18 kernel ?
Actually, allows to avoid painful procedure of apt-getting packages required for
successful build:-  gcc,build-essentials,zlib,libncurses, . . .
Through my comprehension Xen Hypervisor requires xenified kernel, ramdisk,
and daemon xend to run on the system. 

Otherwise, i don''t understand what exactly mean words :-
"Intrepid apparently does have Xen 3.3 hypervisor support"

Thank you.
Boris

--- On Sun, 11/2/08, Todd Deshane <deshantm@gmail.com> wrote:
From: Todd Deshane <deshantm@gmail.com>
Subject: Re: [Xen-users] What packages ubuntu-xen-server &
ubuntu-xen-desktop are up to on intrepid
To: bderzhavets@yahoo.com
Cc: xen-users@lists.xensource.com
Date: Sunday, November 2, 2008, 12:41 AM

On Thu, Oct 30, 2008 at 5:06 PM, Boris Derzhavets <bderzhavets@yahoo.com>
wrote:
> I''ve recently installed Ubuntu Intrepid Server PV DomU at Xen 3.3
CentOS 5.2
> Dom0. Details here (if needed) :-
> http://lxer.com/module/newswire/view/111103/index.html
> Running Synaptic Manager at DomU i''ve noticed packages mentioned
above
as
> available
> for install . I don''t intend install ubuntu-xen-server on DomU ,
but
Ubuntu
> Intrepid Server running on bare metal will potentially allow (?)  to
install
> ubuntu-xen-server
> ( with all dependent packages).
> Per recent message from Todd Deshane,  i''ve learned , that there
is no
> option to install
> Xen 3.3 on Ubuntu Intrepid Server to create  Dom0, unless to make a port
on
> your own :) Apparently  a couple of months is not enough for forward
porting
> Xen 3.3 to intrepid kernel, but i am still confused about packages in
> Synaptic. What they are supposed to serve ?
>
Just to clarify, Intrepid apparently does have Xen 3.3 hypervisor support.
http://packages.ubuntu.com/intrepid/ubuntu-xen-server

The dom0 kernel, just like with Fedora 9,10, is missing from Intrepid as
both Fedora and Ubuntu decided to wait for upstream linux xen support [1,2]
in order for them to again include a dom0 kernel. A pv_ops-based dom0
kernel should soon be supported by the xen developers and be put into
mainline Linux

[1] http://wiki.xensource.com/xenwiki/XenParavirtOps
[2] http://xenbits.xensource.com/paravirt_ops/patches.hg

Cheers,
Todd

-- 
Todd Deshane
http://todddeshane.net
http://runningxen.com



      

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> Otherwise, i don''t understand what exactly mean words :-
> "Intrepid apparently does have Xen 3.3 hypervisor support"
When I say hypervisor, I mean the xen.gz part. That does
not include the dom0 kernel. The dom0 kernel, as you
have already realized, is not included and needs to be
"on your own" either the hardy dom0 kernel, the xen.org
one, the opensuse/debian one, etc.

Cheers,
Todd


-- 
Todd Deshane
http://todddeshane.net
http://runningxen.com

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Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

I just decided to backport right now :-

http://bderzhavets.wordpress.com/2008/11/03/attempt-of-prevu-xen-33-hypervisor-at-ubuntu-hardy-dom0-2624-21-xen/



      

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http://lists.xensource.com/xen-users

Please be advised , as of November 11 Hardy Backports provide Xen 3.3 packages .
They may be installed nicely via Synaptic Manager on top
of ubuntu-xen-server,actually, replacing old packages by new ones and
keeping linux-image-xen , linux-modules-xen, . . . ( stuff related with xenified
Hardy kernel) in place.



--- On Mon, 11/3/08, Boris Derzhavets <bderzhavets@yahoo.com> wrote:
From: Boris Derzhavets <bderzhavets@yahoo.com>
Subject: [Xen-users] Attempt of prevu Xen 3.3 Hypervisor at Ubuntu Hardy Dom0
(2.6.24-21-xen)
To: deshantm@gmail.com
Cc: xen-users@lists.xensource.com
Date: Monday, November 3, 2008, 5:10 AM

I just decided to backport right now :-

http://bderzhavets.wordpress.com/2008/11/03/attempt-of-prevu-xen-33-hypervisor-at-ubuntu-hardy-dom0-2624-21-xen/



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