RE: [Xen-devel] [HOWTO] Setting up Xen4 + pvops 2.6.32.21.x on CentOS 5.5

[Boris Derzhavets <bderzhavets@xxxxxxxxx>]

Option not to start xend via /etc/rc.local (Ubuntu 10.04.1 Server) should be good for
CentOS , i guess :-

--- xend.orig 2010-10-06 18:44:35.055245544 +0400
+++ xend 2010-10-06 18:46:26.056620024 +0400
@@ -21,7 +21,7 @@

shopt -s extglob
test -f /etc/sysconfig/xend && . /etc/sysconfig/xend
-
+/sbin/modprobe -v xenfs
if test "x$1" = xstart && \
test -d /proc/xen && \
! test -d /proc/xen/capabilities && \
@@ -57,6 +57,11 @@
test -z "$XENCONSOLED_TRACE" || export XENCONSOLED_TRACE
[[ "$XENSTORED_TRACE" == @(yes|on|1) ]] && export XENSTORED_TRACE
[[ "$XENBACKENDD_DEBUG" == @(yes|on|1) ]] && export XENBACKENDD_DEBUG
+ /sbin/modprobe -v xen-evtchn
+ /sbin/modprobe -v xen-gntdev
+ /sbin/modprobe -v xen-blkback
+ /sbin/modprobe -v xen-netback
+ /sbin/modprobe -v blktap
xend start
await_daemons_up
;;

Boris.

--- On Tue, 10/5/10, Pradeep Padala <ppadala@xxxxxxxxxxxxxxxxxx> wrote:

From: Pradeep Padala <ppadala@xxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] [HOWTO] Setting up Xen4 + pvops 2.6.32.21.x on CentOS 5.5
To: "Boris Derzhavets" <bderzhavets@xxxxxxxxx>, "Pasi Kärkkäinen" <pasik@xxxxxx>
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Date: Tuesday, October 5, 2010, 1:46 PM

1. Good catch, updated HOWTO
2. It is needed on CentOS 5.5. Otherwise it doesn't work, updated HOWTO with a note.

Pradeep


From: Boris Derzhavets [mailto:bderzhavets@xxxxxxxxx]
Sent: Tuesday, October 05, 2010 7:43 AM
To: Pradeep Padala; Pasi Kärkkäinen
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] [HOWTO] Setting up Xen4 + pvops 2.6.32.21.x on CentOS 5.5

I have two more questions regarding yours "Howto"

1. Quote

***********************************************************************************************
OR, add the following to /etc/rc.local (I had trouble making the modprobe work)
if ( uname -r | grep "2.6.32.21") ; then
   for mod in xen-evtchn xen-netback xen-blkback xenfs; do

        /sbin/modprobe $mod
   done

   /etc/init.d/xend restart
fi
**************************************************************
Xend will fail to start as service if module xenfs has not been loaded yet. So nothing to restart. Should be

service xend start

2.Quote

 Install Xen and kernel
*******************************************************************************************
make install-xen
make install-tools PYTHON_PREFIX_ARG=

cd build-*
make modules_install
make install
***********************************************************
I would guess that on CentOS 5.5 just

make install-tools

due to standard default location of python packages
/usr/lib/python2.x/site-packages . I haven't alive CentOS 5.5
instance, but on Fedoras it's unnecessary

Boris.

--- On Mon, 10/4/10, Boris Derzhavets <bderzhavets@xxxxxxxxx> wrote:

From: Boris Derzhavets <bderzhavets@xxxxxxxxx>
Subject: Re: [Xen-devel] [HOWTO] Setting up Xen4 + pvops 2.6.32.21.x on CentOS 5.5
To: "Pradeep Padala" <ppadala@xxxxxxxxxxxxxxxxxx>, "Pasi Kärkkäinen" <pasik@xxxxxx>
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Date: Monday, October 4, 2010, 8:00 AM
If i will follow :-

http://ppadala.net/blog/2010/09/how-to-setup-xen4-and-pvops-2-6-32-x-on-centos-5-5-using-gitco-repository/

Recommended .config (fragment)

CONFIG_XEN_DEV_EVTCHN=y
CONFIG_XEN_BACKEND=y
CONFIG_XEN_BLKDEV_BACKEND=y
CONFIG_XEN_NETDEV_BACKEND=y
CONFIG_XENFS=y
CONFIG_XEN_COMPAT_XENFS=y

I believe in this case modules :-
   xen-evtchn xen-netback xen-blkback xenfs
won't be created because they are hard linked to kernel.

To get them as modules i need :-

CONFIG_XEN_DEV_EVTCHN=m
CONFIG_XEN_BACKEND=y
CONFIG_XEN_BLKDEV_BACKEND=m
CONFIG_XEN_NETDEV_BACKEND=m
CONFIG_XENFS=m

At least on my system (F14) with .config
Fragment from .config
#
CONFIG_XEN_BALLOON=y
CONFIG_XEN_SCRUB_PAGES=y
CONFIG_XEN_DEV_EVTCHN=y
CONFIG_XEN_BACKEND=y
CONFIG_XEN_NETDEV_BACKEND=m
CONFIG_XEN_BLKDEV_BACKEND=y
CONFIG_XEN_BLKDEV_TAP=y
#
[root@fedora14 2.6.32.23]# pwd
/lib/modules/2.6.32.23
[root@fedora14 2.6.32.23]# find . -name "xen-*back.ko" -print
./kernel/drivers/xen/netback/xen-netback.ko
[root@fedora14 2.6.32.23]# find . -name "xen-evtchn.ko" -print

Module xen-netback.ko has been created only due to :-
  CONFIG_XEN_NETDEV_BACKEND=m

May be i am missing something here ?

Boris.
P.S.
I just need xen-netback to be loaded as module for OpenIndiana 147 PV Guest
stable networking with PVOPS kernel  ( OSOL 134 aswell). In other words i need
to configure PVOPS kernel  like XenLinux  kernel in regards of loading xen backend drivers.


--- On Sun, 10/3/10, Pasi Kärkkäinen <pasik@xxxxxx> wrote:

From: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-devel] [HOWTO] Setting up Xen4 + pvops 2.6.32.21.x on CentOS 5.5
To: "Pradeep Padala" <ppadala@xxxxxxxxxxxxxxxxxx>
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Date: Sunday, October 3, 2010, 3:34 PM
On Tue, Sep 28, 2010 at 11:04:11AM -0700, Pradeep Padala wrote:
>    Hi,
>
>    I spent some time configuring the latest Xen with pvops 2.6.32.x on CentOS
>    5.5. It hasn't been easy, to say the least. My HOWTOs on this are located
>    at
>    [1]http://ppadala.net/blog/2010/09/how-to-setup-xen4-pvops-2-6-32-x-on-centos-5-5/
>    and
>    [2]http://ppadala.net/blog/2010/09/how-to-setup-xen4-and-pvops-2-6-32-x-on-centos-5-5-using-gitco-repository/
>
>    Hope they are helpful. Any comments are welcome. Feel free to add this to
>    Xen4 Wiki.
>

Thanks for the tutorials!
I've added them to Xen4.0 wiki page.

-- Pasi


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