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RE: [Xen-users] Xen 4.0.1 rc3 pre install problem

To: Bruce Edge <bruce.edge@xxxxxxxxx>
Subject: RE: [Xen-users] Xen 4.0.1 rc3 pre install problem
From: Debasish Bose <dbose@xxxxxxxxx>
Date: Tue, 22 Jun 2010 02:48:36 -0700
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Thread-topic: [Xen-users] Xen 4.0.1 rc3 pre install problem
             There was a mistake. The problem is on a new 
Ubuntu-dom0/Ubuntu-domU system (not in CentOS). Replace CentOS with Ubuntu. 
God, I must be feeling sleepy then. Bu the problem remains. I suspect there is 
a clash between
/usr/local/lib and /usr/lib for python packages and the 
site-packages/dist-packages saga. I've deleted all site-packages/xen thing with 
PYTHON_PREFIX_ARG= (empty) ensured that packages went to right place which is I 


Any help will be invaluable for me.

From: Bruce Edge [bruce.edge@xxxxxxxxx]
Sent: Monday, June 21, 2010 9:53 PM
To: Debasish Bose
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Xen 4.0.1 rc3 pre install problem

This may or may not address your problem but it worked for Ubuntu systems with 
a similar requirement, build once and distribute.

Apply the attached patch (not mine) to xen 4.0.1.rc3.pre and then build using:

export KERNELS="" ; export PYTHON_PREFIX_ARG="" ; make dist

This generates a dist dir that puts everything in the right place for Ubuntu 
systems. I know the sysconfig/default changes apply to debian as well, the ones 
I'm not sure about are the python lib location move.

This patch works for 4.0.0 and 4.0.1.rc3.pre, but not 4.1.


On Mon, Jun 21, 2010 at 9:05 AM, Debasish Bose 
<dbose@xxxxxxxxx<mailto:dbose@xxxxxxxxx>> wrote:
          I've successfully ran dom0/domU (both Debian) in my local laptop 
using dom0 with xen-4.0.1-rc3-pre. Great. Now I want to install it 
into couple of test-machines without compiling from source. So I did following..

          a. make dist-xen
          b. make dist-tools PYTHON_PREFIX_ARG="--install-layout=deb"
          c. make dist-stubdom

This should pre-pare my dist/ directory with binaries. With the help of 
top-level /.install.sh I should be able to install it any other machine (same 
ARCH=x86_64/amd64). I've tar-zipped, copied and inflated. The target machine is 
a CentOS 64-bit machine whereas the build machine (my laptop) is a 
Debian/Ubuntu 10.04 64 bit one. After installation, my xend started, 
bridge-magic happened, `brctl -show` is fine, xm info / xm list is fine, ls 
/dev/xen is fine (evtchn,gntdev) too. But when I'm trying
to run a domU (using a working domU-xmexample-config) it has some problem with 
tap driver config and complains

     "ValueError: need more than 1 value to unpack"


File "/usr/lib/python2.6/dist-packages/xen/xend/XendConfig.py", line 342, in 
 File "/usr/lib/python2.6/dist-packages/xen/xend/XendConfig.py", line 857, in 
   cfg = self._parse_sxp(sxp_cfg)
 File "/usr/lib/python2.6/dist-packages/xen/xend/XendConfig.py", line 720, in 
   self.device_add(dev_type, cfg_sxp = config, target = cfg)
 File "/usr/lib/python2.6/dist-packages/xen/xend/XendConfig.py", line 1448, in 
   ret_uuid = self.device_duplicate_check(dev_type, dev_info, target, config)
 File "/usr/lib/python2.6/dist-packages/xen/xend/XendConfig.py", line 1237, in 
   blkdev_file = blkdev_uname_to_file(dev_uname)
 File "/usr/lib/python2.6/dist-packages/xen/util/blkif.py", line 95, in 
   return _parse_uname(uname)[0]
 File "/usr/lib/python2.6/dist-packages/xen/util/blkif.py", line 90, in 
   (taptype, fn) = fn.split(":", 2)[1:3]
ValueError: need more than 1 value to unpack

in xmexample config,

kernel = "/vm/tmp/vmlinuz-"
ramdisk = "/vm/tmp/initrd.img-"
memory = 256
name = "debdomU"
vif = [ 'mac=6A:60:41:4A:60:41,ip=,bridge=eth1' ]
disk = [ "tap:aio:/vm/tmp/core.img,xvda1,w" , 
"tap:aio:/vm/tmp/swap.img,xvda2,w" ]
hostname= "dbose-domU"
root="/dev/xvda1 ro"
extra = "3 console=hvc0"

vmlinuz/initrd/core.img/swap.img are made on Ubuntu and just copied over.

The same config worked earlier on a ubuntu-dom0/ubuntu-domU setup. Is this 
something to do with CentOS-dom0/Ubuntu-domU? Is copying binaries (pyc) built 
in Ubuntu wrong? Then how even xend/xendomains got started? If xend started 
with same python tool chain, what's wrong with domU booting up?

Please help me guys. Should I re-compile?

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