xen discuss - Oct 2008 - Ubuntu DomU into Indiana Dom0 -- another approach

Following noogie''s howto
(http://opensolaris.org/jive/thread.jspa?threadID=62436), I thought I''d
share my approach to this problem.

Most of this procedure is intended to be a paste-bomb.  I''m working on
amd64, some details will need to change for other architectures.

Install and start Apache so that we can pretend to be an Ubuntu mirror
(optional, but it''s faster this way):

pkg install SUNWapch22
svccfg -v import /var/svc/manifest/network/http-apache22.xml
svcadm enable svc:/network/http:apache22


Grab the Ubuntu server alternate (.1) CD for this architecture, mount it up and
link it into the Apache Docroot:

mkdir -p /export/isoimages
cd /export/isoimages
wget http://mirrors.gigenet.com/ubuntu/hardy/ubuntu-8.04.1-server-amd64.iso
iso="/export/isoimages/ubuntu-8.04.1-server-amd64.iso"
dev=`lofiadm -a $iso`
dir=`echo $iso | sed ''s/\.iso$//''`
mkdir -p $dir
mount -Fhsfs $dev $dir
ln -s $dir/ubuntu /var/apache2/2.2/htdocs/


Grab a xen-ified kernel from xensource:

mkdir -p /xen/ubuntu /xen/temp
cd /xen/temp
wget
http://bits.xensource.com/oss-xen/release/3.1.0/bin.tgz/xen-3.1.0-install-x86_64.tgz
gzcat xen-3.1.0-install-x86_64.tgz | gtar xvf -
dist/install/boot/vmlinuz-2.6.18-xen
cp dist/install/boot/vmlinuz-2.6.18-xen /xen/ubuntu/


Now we need the Hardy (Ubuntu 8.04) initrd.img for network installation:

cd /xen/ubuntu
wget
http://archive.ubuntu.com/ubuntu/dists/hardy/main/installer-amd64/current/images/netboot/ubuntu-installer/amd64/initrd.gz


Create the disk image to be used by Ubuntu:

/opt/csw/bin/qemu-img create /xen/ubuntu/ubuntu.img 5G


Finally, create the VM config file:

cat > ubuntu-install.cfg << EOF
kernel = "/xen/ubuntu/vmlinuz-2.6.18-xen"
ramdisk = "/xen/ubuntu/initrd.gz"
name = "ubuntu-install"
memory = "512"
disk = [ ''file:/xen/ubuntu/ubuntu.img,hda,w'', ]
vif = [ ''mac=00:16:3e:11:11:11'' ]
EOF
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This message posted from opensolaris.org

Before booting the VM, install netcat (if you don''t already have it),
and start a listener.  We''ll need it later.

pkg install SUNWnetcat
cd /xen/ubuntu
nc -l -p 10000 | tar xvf - &


Start the VM!

xm create -c ubuntu-install.cfg


Here are the hilights of the install process:

Mirror Country: Manual (scroll to the top to find it)
Mirror Host: Your Dom0 IP goes here
Mirror Directory: /ubuntu  (the symlink to the install cd)
Continue withouth loading modules? Yes  (xensource kernel can''t load
the installer''s modules -- doesn''t seem to be a big deal)
/dev/hda "invalid argument": Ignore (several times)


Now, DON''T reboot at the end of the installation.  Instead:

Installation complete: go back
Execute A Shell
Continue
chroot /target apt-get install linux-image-2.6.24-19-xen
chroot /target apt-get install linux-ubuntu-modules-2.6.24-19-xen


And now use the netcat listener to ship your new kernel stuff to Dom0:

cd /target/boot
/target/bin/tar cvf - vmlinuz*xen initrd*xen | nc 192.168.1.8 10000

The only thing missing now is a login service running on the system console.
Init thinks the console is a PC monitor and keyboard. The console is really the
xvc0 device created by the Xen kernel. Kill off the gettys on the bogus ttys,
and start one in the right place:

cd /target/etc/event.d
rm tty?
cat > xvc0 << EOF
start on stopped rc2
start on stopped rc3
start on stopped rc4
start on stopped rc5

stop on runlevel 0
stop on runlevel 1
stop on runlevel 6

respawn
exec /sbin/getty 38400 xvc0
EOF


Finally, quit the installation and find yourself back at the Dom0 prompt. 
We''re done with the xensource kernel, the net-install initrd.gz and the
install VM config:

mkdir .install
mv ubuntu-install.cfg vmlinuz-2.6.18-xen initrd.gz .install


Now, a new VM config for the installed ubuntu image:

cat > ubuntu.cfg << EOF
kernel = "/xen/ubuntu/vmlinuz-2.6.24-19-xen"
ramdisk = "/xen/ubuntu/initrd.img-2.6.24-19-xen"
extra = "root=/dev/hda1 linux 2"
name = "ubuntu"
memory = "512"
disk = [ ''file:/xen/ubuntu/ubuntu.img,hda,w'' ]
vif = [ ''mac=00:16:3e:11:11:11'' ]
EOF

Done!
--
This message posted from opensolaris.org

Whoops!

The end of my first post got mangled by my use of this character: <

It should read:

Finally, create the VM config file:

cat > ubuntu-install.cfg << EOF
kernel = "/xen/ubuntu/vmlinuz-2.6.18-xen"
ramdisk = "/xen/ubuntu/initrd.gz"
name = "ubuntu-install"
memory = "512"
disk = [ ''file:/xen/ubuntu/ubuntu.img,hda,w'', ]
vif = [ ''mac=00:16:3e:11:11:11'' ]
EOF
--
This message posted from opensolaris.org

I've tried to setup VNC on debootstraped image :-
# apt-get install ubuntu_desktop ( every time with certain issues)
# apt-get remove NetworkManager
# apt-get install vnc4server xinetd

# vi /etc/gdm/gdm.conf

Uncomment this line
RemoteGreeter=/usr/lib/gdm/gdmlogin

Enable xdmcp, look for [xdmcp] and change Enable to true.
[xdmcp]
Enable=true

*****************
Restart gdm
*****************

# /etc/init.d/gdm restart
Setup xinetd
*****************************************
Create a new service file for xinetd
*****************************************
# vi /etc/xinetd.d/Xvnc
service Xvnc
{
type = UNLISTED
disable = no
socket_type = stream
protocol = tcp
wait = no
user = nobody
server = /usr/bin/Xvnc
server_args = -inetd -query localhost -geometry 1024×768 -depth 16 -cc 3 -once
-SecurityTypes=none -extension XFIXES
port = 5901
}
******************
Restart xinetd
******************
# /etc/init.d/xinetd restart

Gnome Settings Daemon fails to start. Details may be viewed here:-
http://bderzhavets.wordpress.com/2008/10/10/attempt-of-vnc-setup-on-ubuntu-hardy-pv-domu-at-xen-33-centos-52-dom0-all-64-bit/

Maybe your approach would work better ?
--
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One more question. Looks like you managed on OpenSolaris 2008/11 (05).
I am not sure would packages names be the same on SNV_98.
--
This message posted from opensolaris.org

@dbaxps:

I can''t comment on whether a different Ubuntu install technique would
change your DomU desktop experience any.

I''ve never had a requirement for a GUI in a DomU.

I was just trying to illustrate how to install a PV Ubuntu DomU without the
Solaris -> HVM -> Ubuntu Dom0 -> Ubuntu DomU  stack.

Regarding the specific Solaris release - I''m using this one:
http://genunix.org/distributions/indiana/osol-0811-98.iso

/chris
--
This message posted from opensolaris.org

Chris,
To reproduce your schema on Nevada b98 , i would have to install Apache (1) and
nl (2). Right ?
One more question. In general, on CentOS 5.X (RHEL 5.x)  if i could properly
emulate http mirror on local Apache Server, i guess it should be possible to
manage via virt-install. My experience with local http mirrors is 0. Just , NFS
shares on linux
and Nevada.
--
This message posted from opensolaris.org

Apache -- It''s optional.  You can skip the bit with grabbing, mounting
and serving (via apache) the ubuntu iso image.

You''d just point to a real ubuntu mirror site during the ubuntu
installation.  Which is the default behavior anyway.


Netcat -- The purpose here is to get the xen-ified ubuntu kernel and initrd.gz
off the ubuntu VM, and onto the Dom0.  There are probably other ways to do this:

- download the debian packages to the Dom0; rip the files right out of the
ARchives
- use some other transfer mechanism -- this is complicated by the state of the
ubuntu system during install.  Probably worked around with LD_LIBRARY_PATH
- re-use the xensource kernel for the first boot
- mount the ubuntu fs on your Dom0 machine (probably easy if your Dom0 is
CentOS)
--
This message posted from opensolaris.org

> Following noogie''s howto
> (http://opensolaris.org/jive/thread.jspa?threadID=6243
> 6), I thought I''d share my approach to this problem.
> 
> Most of this procedure is intended to be a
> paste-bomb.  I''m working on amd64, some details will
> Grab the Ubuntu server alternate (.1) CD for this
> architecture, mount it up and link it into the Apache
> Docroot:
> 
> mkdir -p /export/isoimages
> cd /export/isoimages
> wget
> http://mirrors.gigenet.com/ubuntu/hardy/ubuntu-8.04.1-
> server-amd64.iso
> iso="/export/isoimages/ubuntu-8.04.1-server-amd64.iso"
> 
> dev=`lofiadm -a $iso`
> dir=`echo $iso | sed ''s/\.iso$//''`
> mkdir -p $dir
> mount -Fhsfs $dev $dir
> ln -s $dir/ubuntu /var/apache2/2.2/htdocs/
Thanks a lot for this code. I''ve got the point.
http://bderzhavets.wordpress.com/2008/10/17/install-opensuse-11-domu-at-xen-33-centos-52-dom0-via-local-http-server-all-64-bit/
http://bderzhavets.wordpress.com/2008/10/15/install-centos-52-f9-pv-domus-at-opensuse-11-dom0-via-local-http-server-all-64-bit/
--
This message posted from opensolaris.org

> Here are the hilights of the install process:
> 
> Mirror Country: Manual (scroll to the top to find
> it)
> Mirror Host: Your Dom0 IP goes here
I''ve attempted to reproduce your schema at Xen 3.3 CentOS 5.2 Dom0:-

1. I was not given an opportunity  to enter IP of local HTTP Server different
from    selected by system official mirror FQDN.
2. Utility qemu-img seems to be important to use, because after portioning
   gets done installer fails to mount / on /dev/hda1 or /dev/xvda1 (both options
   have been tested). 
Installation procedure seems to be OpenSolaris specific versus debootstrap
working everywhere.
Could you be so kind to provide some other link with with Ubuntu PV DomU
installation via HTTP  procedure described , which doesn''t utilize
debootstrap,
of course if one exists  ? 
> Mirror Directory: /ubuntu  (the symlink to the
> install cd)
> Continue withouth loading modules? Yes  (xensource
> kernel can''t load the installer''s modules --
doesn''t
> seem to be a big deal)
> /dev/hda "invalid argument": Ignore (several times)
--
This message posted from opensolaris.org

> 1. I was not given an opportunity to enter IP of local HTTP Server
> different from selected by system official mirror FQDN.
Doesn''t make sense.  The feature is built into the initrd-based
installer I cited.  Did you scroll to the top of the country list?
> 2. Utility qemu-img seems to be important to use, because after
partitioning
> gets done installer fails to mount / on /dev/hda1 or /dev/xvda1 (both
options
> have been tested). 
qemu-img is the only way I have tried creating the disk image.  I don''t
know what special things it  might do that are not accomplished with a sparse
file created by dd or mkfile.  Sorry, I don''t know why it
isn''t working on your CentOS Dom0.
> Installation procedure seems to be OpenSolaris specific versus debootstrap
> working everywhere.
Maybe.  It''s reproducible in the environment I described.  More than
that I cannot promise.
--
This message posted from opensolaris.org

--- On Mon, 10/20/08, chris <opensolaris.org@marget.com> wrote:
From: chris <opensolaris.org@marget.com>
Subject: Re: [xen-discuss] Ubuntu DomU into Indiana Dom0 -- another approach
To: xen-discuss@opensolaris.org
Date: Monday, October 20, 2008, 8:59 AM
> 1. I was not given an opportunity to enter IP of local HTTP Server
> different from selected by system official mirror FQDN.
Doesn''t make sense.  The feature is built into the initrd-based
installer I
cited.  Did you scroll to the top of the country list?
*******************************
Sorry, i''ll try one more time
*******************************
> 2. Utility qemu-img seems to be important to use, because after
partitioning
> gets done installer fails to mount / on /dev/hda1 or /dev/xvda1 (both
options
> have been tested). 
qemu-img is the only way I have tried creating the disk image.  I don''t
know what special things it  might do that are not accomplished with a sparse
file created by dd or mkfile.  Sorry, I don''t know why it
isn''t working
on your CentOS Dom0.
> Installation procedure seems to be OpenSolaris specific versus debootstrap
> working everywhere.
Maybe.  It''s reproducible in the environment I described.  More than
that I
cannot promise.
--
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