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

[Debasish Bose <dbose@xxxxxxxxx>]

Thanks a lot. I've used the .deb installer files and after I've changed tap:aio 
to file: my, domU (lucid variant) comes up. Great help guys. I love 
xen-community.

Now I've some more challenging questions. I'll explore but throwing out there 
in the "xen-cloud", if somebody already has faced...

a. Does the vif2=[ 'pdev=peth1,bridge=eth1' ] stuff works in 4.0.1-rc3 
(NetChannel 2)
b. If the host machine (quad core) has a quad-port NIC, is it possible (for 
performance reason) to run multiple privileged domain and let each of them see 
1 of the 4 Ethernet ports.
c. In a traditional, PV guests, how to enable VMDq support. Is modprobe igb.ko 
VMDQ=8 enough? How it relates to MSI-X? Is there a special way to build dom0 
(config perspective)?
    Does are some tricky modifications to the 'bridge-magic'?

-Thanks
Deb
________________________________________
From: Boris Derzhavets [bderzhavets@xxxxxxxxx]
Sent: Wednesday, June 23, 2010 8:21 PM
To: Debasish Bose; Bruce Edge
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Xen 4.0.1 rc3 pre install problem

http://bderzhavets.wordpress.com/2010/06/17/hackery-xen-4-0-1-rc2-source-kernels-packaged-for-ubuntu-lucid-virtualusr-site/

I have limited experience with packaging above.
With xen-4.0_4.0.1rc3-0ubuntu1.diff.gz   xend should start without clean up.
Boris.

--- On Mon, 6/21/10, Bruce Edge <bruce.edge@xxxxxxxxx> wrote:

From: Bruce Edge <bruce.edge@xxxxxxxxx>
Subject: Re: [Xen-users] Xen 4.0.1 rc3 pre install problem
To: "Debasish Bose" <dbose@xxxxxxxxx>
Cc: "xen-users@xxxxxxxxxxxxxxxxxxx" <xen-users@xxxxxxxxxxxxxxxxxxx>
Date: Monday, June 21, 2010, 12:23 PM


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.

-Bruce


On Mon, Jun 21, 2010 at 9:05 AM, Debasish Bose 
<dbose@xxxxxxxxx</mc/compose?to=dbose@xxxxxxxxx>> wrote:
Guys,
          I've successfully ran dom0/domU (both Debian) in my local laptop 
using 2.6.32.15 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"

/var/log/xen/xend.log

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

in xmexample config,

kernel = "/vm/tmp/vmlinuz-2.6.32.15-domU-deb"
ramdisk = "/vm/tmp/initrd.img-2.6.32.15-domU-deb"
memory = 256
name = "debdomU"
vif = [ 'mac=6A:60:41:4A:60:41,ip=172.16.30.201,bridge=eth1' ]
disk = [ "tap:aio:/vm/tmp/core.img,xvda1,w" , 
"tap:aio:/vm/tmp/swap.img,xvda2,w" ]
dhcp="dhcp"
netmask="255.255.255.0"
gateway="172.16.30.10"
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?

-Thanks
Deb
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