Xen users - Nov 2010 - What is required for Xen to show VNC for HVM installs?

I have a stock CentosOS xen install.  (Just choose "Virtualization"
from the
install package list).  It is running paravirtualized VMs with no issues,
however when I attempt to install a different operating system (like Ubuntu)
using HVM and VNC=1, I can never attach the VNC client (remote)  to the
server.  The exact same xen configuration file works on a different server.
 I''ve turned off IPTABLES on the server having problems, so it is not a
firewall problem.  Are there any special packages that I need to install to
get the vnc session to come up?  I''m using a low vnc port (like 30),
but
that is not a problem on the other server. I don''t see any errors in
the xen
log, and I''ve tried both a virt-install scripted install and a normal
hand-built config + xm create, but neither brought up the vnc console.

Thanks in advance

Here is my xen config file, in case it gives any clues

name = "xen1-130"
builder = "hvm"
memory = "384"
disk
[''tap:aio:/xen/xen1-130.img,ioemu:hda,w'',''file:/xen/isos/ubuntu-10.04.1-server-i386.iso,hdc:cdrom,r'']
vif = [
''type=ioemu,mac=00:16:3e:01:01:24,bridge=xenbr1,vifname=xen1-130'']
device_model = "/usr/lib64/xen/bin/qemu-dm"
kernel = "/usr/lib/xen/boot/hvmloader"
vnc=1
vncdisplay=30
boot="d"
vcpus=4
acpi="0"
serial = "pty" # enable serial console
on_reboot   = ''restart''
on_crash    = ''restart''


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does netstat show vnc listening? did you change the interface vnc
binds to in xend-config.sxp?

On Sun, Nov 21, 2010 at 11:11 PM, VPS Lime <vpslime@gmail.com>
wrote:
> I have a stock CentosOS xen install.  (Just choose
"Virtualization" from the
> install package list).  It is running paravirtualized VMs with no issues,
> however when I attempt to install a different operating system (like
Ubuntu)
> using HVM and VNC=1, I can never attach the VNC client (remote)  to the
> server.  The exact same xen configuration file works on a different server.
>  I''ve turned off IPTABLES on the server having problems, so it is
not a
> firewall problem.  Are there any special packages that I need to install to
> get the vnc session to come up?  I''m using a low vnc port (like
30), but
> that is not a problem on the other server. I don''t see any errors
in the xen
> log, and I''ve tried both a virt-install scripted install and a
normal
> hand-built config + xm create, but neither brought up the vnc console.
> Thanks in advance
> Here is my xen config file, in case it gives any clues
> name = "xen1-130"
> builder = "hvm"
> memory = "384"
> disk >
[''tap:aio:/xen/xen1-130.img,ioemu:hda,w'',''file:/xen/isos/ubuntu-10.04.1-server-i386.iso,hdc:cdrom,r'']
> vif = [
''type=ioemu,mac=00:16:3e:01:01:24,bridge=xenbr1,vifname=xen1-130'']
> device_model = "/usr/lib64/xen/bin/qemu-dm"
> kernel = "/usr/lib/xen/boot/hvmloader"
> vnc=1
> vncdisplay=30
> boot="d"
> vcpus=4
> acpi="0"
> serial = "pty" # enable serial console
> on_reboot   = ''restart''
> on_crash    = ''restart''
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>
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I found the issue - I had changed the vnc-listen in the xend-config.swx, but
had not restarted Dom0 so it never got picked up.  When I added a
vnclisten="<IP ADDRESS>" to the DomU config file, I was able to
connect.

On Mon, Nov 22, 2010 at 12:10 AM, chris <tknchris@gmail.com> wrote:
> does netstat show vnc listening? did you change the interface vnc
> binds to in xend-config.sxp?
>
> On Sun, Nov 21, 2010 at 11:11 PM, VPS Lime <vpslime@gmail.com> wrote:
> > I have a stock CentosOS xen install.  (Just choose
"Virtualization" from
> the
> > install package list).  It is running paravirtualized VMs with no
issues,
> > however when I attempt to install a different operating system (like
> Ubuntu)
> > using HVM and VNC=1, I can never attach the VNC client (remote)  to
the
> > server.  The exact same xen configuration file works on a different
> server.
> >  I''ve turned off IPTABLES on the server having problems, so
it is not a
> > firewall problem.  Are there any special packages that I need to
install
> to
> > get the vnc session to come up?  I''m using a low vnc port
(like 30), but
> > that is not a problem on the other server. I don''t see any
errors in the
> xen
> > log, and I''ve tried both a virt-install scripted install and
a normal
> > hand-built config + xm create, but neither brought up the vnc console.
> > Thanks in advance
> > Here is my xen config file, in case it gives any clues
> > name = "xen1-130"
> > builder = "hvm"
> > memory = "384"
> > disk > >
>
[''tap:aio:/xen/xen1-130.img,ioemu:hda,w'',''file:/xen/isos/ubuntu-10.04.1-server-i386.iso,hdc:cdrom,r'']
> > vif = [
>
''type=ioemu,mac=00:16:3e:01:01:24,bridge=xenbr1,vifname=xen1-130'']
> > device_model = "/usr/lib64/xen/bin/qemu-dm"
> > kernel = "/usr/lib/xen/boot/hvmloader"
> > vnc=1
> > vncdisplay=30
> > boot="d"
> > vcpus=4
> > acpi="0"
> > serial = "pty" # enable serial console
> > on_reboot   = ''restart''
> > on_crash    = ''restart''
> > _______________________________________________
> > Xen-users mailing list
> > Xen-users@lists.xensource.com
> > http://lists.xensource.com/xen-users
> >
>

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