[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-users] General question on running guests from installed OS

Hello Srini

Wrote an mail to Fedora Xen mailing list, but I think they kicked it out. But it included some answers to the questions you have. So I've pasted the mail below...

Hope this helps you a little bit.

bye Philipp

==================================================== beginning of the email ===========================================================

Dear Robert

First of all, I've had the same questions and problems as you have now. This style of none documentation by the fedora team is just a shame for the whole open source community! Probably Jeremy Katz is too busy by meeting his new board members friends, so that he has no more time to write just a little documentation with explanations, not just a unusable mini mini howto.

What the big problem is behind the FC5 and Xen implementation is, that the xen guys at fedora have no idea what SELinux is doing. So, finally they made an implementation of xen and SELinux that is not usable. If you don't want to spend two weeks configuring your SELinux, you have to decide, if you use in future SELinux or Xen (By the way, the same issues you have with httpd and SELinux).

So my personal proposal is, that you just disable SELinux wherever you find it on your FC5 installation. After disabling SELinux (you have to reboot so that everything works fine, => Oh I like this old nice M$ Win95 style of system management) you can use your xen config as you posted in your mail.

With the xenguest-install.py script you can't install FC4 or another distribution, because the FC5 guys made an adaptation of the anaconda system installer. By the way, this is a nice feature, because you can now kickstart your FC5 installation.

If you want to install a new non FC5 guest, do it in the old style. Create your devices with LVM and perform a yum groupinstall with --installdir=yourdevice.

As you can see, Fedora Core 5 is a typical example for bad IT Management. They tried to do a lot of thing in a short time. So several teams worked on different things and now, nothing really fits together. The whole implementation of the SELinux is a disaster. So for professional use, you have to go back to Fedora Core 4. Also because the oracle stuff is not working with the new glibc (it's not possible to start the listener... :-(). I by myself have to use FC5, because I need to kickstart my xen installation and need apache 2.2. If you don't need those features, use CentOS or the original RHES.

Hope I gave you the right hints.

bye Philipp

Philipp Jäggi
SNCT Sandweiler
bp 23
L-5230 Sandweiler

+352 35'72'14'342

"Robert Mortimer" <rmortimer@xxxxxxxxxxxxxxxxxxxxxxxx>
Sent by: fedora-xen-bounces@xxxxxxxxxx

04/18/2006 04:22 PM

[Fedora-xen] Running FC4 on FC5

I am attempting to run an FC4 image on an FC5 machine
I have prepped the image as per the FC4 quick start
my xen config is as follows

kernel ="/boot/vmlinuz-2.6.13-1.1532_FC4xenU"
memory = 100
name = "vm01"
vcpus = 1
vif= ['mac=FE:FD:25:63:74:49']
disk = [ 'file:/root/VM/fedora.img,sda1,w' ]
root = "/dev/sda1"
extra = "ro selinux=0 3"

All I get is

# xm create vm01
Using config file "vm01".
Error: Error creating domain: (22, 'Invalid argument')
Has anyone got a simple 1 NIC guest config for FC4 on FC5

I see that the new FC5 uses
An init image as part of the boot
A python based boot loader
and a python based install script

Is there any way to hack this lot to do an install like the FC5/FC5 one?
How are the init images built?
Will the new installer do other guest OS's in the future?


Fedora-xen mailing list

==================================================== end of the email ===========================================================

Philipp Jäggi
SNCT Sandweiler
bp 23
L-5230 Sandweiler

+352 35'72'14'342

"Srinivasan S" <ssrini@xxxxxxxxxxxxx>
Sent by: xen-users-bounces@xxxxxxxxxxxxxxxxxxx

04/19/2006 06:39 AM

[Xen-users] General question on running guests from installed OS


First of all apologies for making all of you read this long email.  I have posted to multiple lists to get my setup running.  Inspite of enthusiastic help I have not got it running yet and hence this fundamental doubt.

I had a system running FC4 and Xen 2.x.  The same system had normal installations of Suse and Ubuntu.  I had a running setup wherin I started xen0 in FC4 and was able to run the installed Suse and Ubuntu as guests within FC4.  (This worked perfectly and I was able to connect to the guests using both RealVNC and FreeNX.)

I have now upgraded to FC and have been attempting to get the same setup running.  I first tried with the official Xen tarballs.  Not successful, I then tried yesterday with the FC5 xen kernels.  No success.  The problem in both cases is that Suse and Ubuntu guests load but virtual networking does not work.  Only lo interface is up.  On the main FC5 xen0 domain, I am able to see vifx.x being added as and when a guest boots up, but the guest itself is without an interface.

Various searches on Google finally got me one hint on loading module xennet (for FC5) which I did in modprobe.conf.  Same result.

Search on web got me guides to load guests from images, starting guest installs from fedora, debian etc but could not find any info on running already installed linux distros within Xen.  The closet was in the xen manual which explains how to make an image of an installed linux distro and then running the image within xen.

Question:  Is what Iam trying to achieve possibly with Xen 3.x (since it worked with 2.x) ?  If yes can anyone help ?  My guest config file is a very simple one :

kernel = << Tried both the xen kernel and the FC5 xenU kernel >>
memory = 100
name = "suseguest"
vif= ['mac=aa:00:10:00:00:10, bridge=xenbr0, ip=']
Also tried vif= ['']
gateway = ""
netmask = ""
disk = ['phy:hdc3,hdc3,w']
Also tried disk = ['file:/dev/hdc3,hdc3,w']
root = "/dev/hdc3 rw"

Please note that OpenSUSE is installed on /dev/hdc3

All help is appreciated in resolving this.

Thanks and Best Regards

Check out the latest SMS services @ http://www.linuxmail.org
This allows you to send and receive SMS through your mailbox.

Powered by Outblaze

Xen-users mailing list

Xen-users mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.