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Amit Kumar Saha [amitsaha.in at gmail.com]
Hi all,
I am trying to install Xen 3.1.0 from source. When I do a "make world", after some processing I get this
Cannot find linux-2.6.18.tar.bz2 in path .and it starts retrieving the file from www.kernel.org
I do not want this. I have got a local copy of linux-2.6.18.tar.bz2 in /usr/src as well as the directory where Xen source code is stored. PATH setting did not help either.
How can I get around this?
I did install Xen 3.0 from synaptic,but it did not seem to work either. It is not able to boot into the Xen kernel, because the file vmlinuz-xen-0 is not created at all.
Please suggest how I can get Xen up and running!
Thanks
-- Amit Kumar Saha [URL]:http://amitsaha.in.googlepages.com
Kapil Hari Paranjape [kapil at imsc.res.in]
Hello,
On Tue, 19 Jun 2007, Amit Kumar Saha wrote:
> I am trying to install Xen 3.1.0 from source.
If you only want to create and use virtual machines then this is not the preferred path on Debian and its derivatives.
> I did install Xen 3.0 from synaptic,but it did not seem to work > either. It is not able to boot into the Xen kernel, because the file > vmlinuz-xen-0 is not created at all.
If you are following the instructions from the Xen site then you may not be doing things the "Debian way". The instructions on the Debian (or Ubuntu) wiki may be more appropriate. Specifically, http://wiki.debian.org/Xen is probably the place to start.
If you understand how these things work then dom0 is a Debian with the kernel "linux-image-xen-686" with "libc6-xen" and "xen-hypervisor-*-i386" or the pae version for > 4GB of RAM. This and other "xen" Debian packages can be used to start and stop the other "dom"s.
The remaining "dom"s are Debian or other systems as appropriate and can run with most kernels and/or libc variants.
I have not run such a system for anything except some minimal
tryouts so YMMV. In particular, if you figure things out then an
article for LG would be good 
Regards,
Kapil. --
René Pfeiffer [lynx at luchs.at]
Hello!
On Jun 19, 2007 at 1543 +0530, Amit Kumar Saha appeared and said:
> Hi all, > I am trying to install Xen 3.1.0 from source. When I do a "make world" > , after some processing I get this > Cannot find linux-2.6.18.tar.bz2 in path . > and it starts retrieving the file from www.kernel.org
This is the normal behaviour of a Xen source installation. The Xen sources use a specific Linux kernel from www.kernel.org and patches for this very kernel version. There's no harm done since you can boot your distribution's kernel any time you don't want to use Xen. Xen requires "Xen-ified" kernels.
> I do not want this. I have got a local copy of linux-2.6.18.tar.bz2 in > /usr/src as well as the directory where Xen source code is stored. > PATH setting did not help either. > How can I get around this?
Your only alternative option is to use Xen packages from Ubuntu.
> I did install Xen 3.0 from synaptic,but it did not seem to work > either. It is not able to boot into the Xen kernel, because the file > vmlinuz-xen-0 is not created at all. > Please suggest how I can get Xen up and running!
When installing Xen I usually build new Xen0 and XenU kernels after having done "make world". The Xen source install often doesn't build kernels matching my hardware (and obviously my needs). Just do a "make world" and reenter the kernel source directories. Then build a Xen0 and a XenU kernel, install it into /boot/ and /lib/modules/ and you should have a working Xen installation. Don't forget to check the paths in the config file of your boot loader. In the case of Grub there should be something similar to this in /boot/grub/menu.lst:
title Xen 3.0 / XenLinux 2.6 root (hd0,0) kernel /boot/xen-3.0.gz dom0_mem=3D262144 module /boot/vmlinuz-2.6-xen root=3D/dev/sda1 ro console=3Dtty0 module /boot/initrd.img-2.6.16-xen/boot/xen-3.0.gz is the Xen hypervisor.
/boot/vmlinuz-2.6-xen is your Dom0 kernel.
/boot/initrd.img-2.6.16-xen is the initial ramdisk to your Dom0 kernel (and is optional if your kernel supports all necessary driver to bootstrap the system).
I suggest having at least one additional entry for the Ubuntu kernel in the boot loader configuration. It simplifies the dorrection of errors.
Best wishes, René.
Amit Kumar Saha [amitsaha.in at gmail.com]
Hello René Pfeiffer,
> This is the normal behaviour of a Xen source installation. The Xen > sources use a specific Linux kernel from www.kernel.org and patches > for this very kernel version. There's no harm done since you can boot > your distribution's kernel any time you don't want to use Xen. Xen > requires "Xen-ified" kernels. > > Your only alternative option is to use Xen packages from Ubuntu.
I used Synaptic to install the xen-hypervisor, xen man, xen-utils etc except the Linux kernel xen images. However the result is same. It creates xen-3.0-amd64.gz but does not create the vmlinuz-xen*. I believe this is because I am not installing the linux kernel xen images. Is it?
Regards,
-- Amit Kumar Saha [URL]:http://amitsaha.in.googlepages.com
René Pfeiffer [lynx at luchs.at]
On Jun 19, 2007 at 2040 +0530, Amit Kumar Saha appeared and said:
> Hello René Pfeiffer, > > This is the normal behaviour of a Xen source installation. The Xen > > sources use a specific Linux kernel from www.kernel.org and patches > > for this very kernel version. There's no harm done since you can boot > > your distribution's kernel any time you don't want to use Xen. Xen > > requires "Xen-ified" kernels. > > > > Your only alternative option is to use Xen packages from Ubuntu. > I used Synaptic to install the xen-hypervisor, xen man, xen-utils etc > except the Linux kernel xen images. However the result is same. It > creates xen-3.0-amd64.gz but does not create the vmlinuz-xen*. I > believe this is because I am not installing the linux kernel xen > images. Is it?
Yes, this looks like the Xen Linux kernel images are packaged seperately. You should have something like this
lynx@isis:~$ ls -1 /boot/*xen* /boot/config-2.6.16.33-xen /boot/initrd.img-2.6.16.33-xen /boot/initrd.img-2.6.16-xen /boot/System.map-2.6.16.33-xen /boot/vmlinux-syms-2.6.16.33-xen /boot/vmlinuz-2.6.16.33-xen /boot/vmlinuz-2.6.16-xen /boot/vmlinuz-2.6-xen /boot/vmlinuz-2.6-xenU /boot/xen-3.0.4-1.gz /boot/xen-3.0.gz /boot/xen-3.gz /boot/xen.gz /boot/xen-syms-3.0.4-1 lynx@isis:~$in /boot/. xen-3.0.4-1.gz is the Xen hypervisor, vmlinuz-2.6-xen is the Domain 0 kernel and vmlinuz-2.6-xenU is the kernel for the guest domains. Try installing the Xen Linux kernel image package(s) and see if you get similar results.
Best wishes, René.
Amit Kumar Saha [amitsaha.in at gmail.com]
Hello René Pfeiffer
I installed xen0-linux-2.6.16-11.2-generic and all I have now is this:
config-xen0-2.6.16-11.2-generic System.map-xen0-2.6.16-11.2-generic xen0-linux-2.6.16-11.2-generic xen0-linux-2.6.16-11.2-generic-xen0.initrd.img xen-3.0-amd64.gz xen-3.1.0.gz xen-3.1.gz xen-3.gz xen.gz xen-syms-3.1.0I guess I have to manually create a initrd image, so I do a
sudo mkinitramfs -o /boot/xen0-linux-2.6.16-11.2-generic-xen0.initrd.img 2.6.16-11.2-generic-xen0which returns me
W: udev hook script requires at least kernel version 2.6.17 W: not generating requested initramfs for kernel 2.6.16-11.2-generic-xen0Now what should I do? Install a later xen kernel package?
Regards,
-- Amit Kumar Saha [URL]:http://amitsaha.in.googlepages.com
René Pfeiffer [lynx at luchs.at]
On Jun 20, 2007 at 0047 +0530, Amit Kumar Saha appeared and said:
> [...] > I installed xen0-linux-2.6.16-11.2-generic and all I have now is this: > config-xen0-2.6.16-11.2-generic > System.map-xen0-2.6.16-11.2-generic > xen0-linux-2.6.16-11.2-generic > xen0-linux-2.6.16-11.2-generic-xen0.initrd.img > xen-3.0-amd64.gz > xen-3.1.0.gz > xen-3.1.gz > xen-3.gz > xen.gz > xen-syms-3.1.0
Looks good to me. I assume these were installed from the source distribution of Xen.
> I guess I have to manually create a initrd image,So i do a > sudo mkinitramfs -o > /boot/xen0-linux-2.6.16-11.2-generic-xen0.initrd.img > 2.6.16-11.2-generic-xen0 > which returns me > W: udev hook script requires at least kernel version 2.6.17 > W: not generating requested initramfs for kernel 2.6.16-11.2-generic-xen0 > Now what should I do? Install a later xen kernel package?
AFAIK there were some changes to udev both in the userspace daemon and in the kernel. It seems you have two options.
- Use your installed images without initrd (and make sure that the kernel has all necessary drivers to boot into a working system).
- Use Ubuntu's packages which should have a preinstalled initrd. This also means using Ubuntu's Xen package, not the source distribution of Xen.
Using no initrd is a feasible way. I did this on my Debian Sarge systems which I use with recent kernels from www.kernel.org. I had to deactivate udev and skip the initrd generation (BTW the initrd format has also changed in recent kernels, so old mkinitrd tools won't work anymore).
Best wishes, René.
Peter Knaggs [peter.knaggs at gmail.com]
On 6/19/07, Amit Kumar Saha <amitsaha.in@gmail.com> wrote:
> Please suggest how I can get Xen up and running!
I noticed on Ubuntu 7.04 Feisty Fawn, there's a couple of "metapackages" for xen, called "ubuntu-xen-desktop" and "ubuntu-xen-server". I just did
apt-get install ubuntu-xen-desktopand this adds the following entry to /boot/grub/menu.lst
title Xen 3.0-i386 / Ubuntu, kernel 2.6.19-4-generic root (hd0,0) kernel /boot/xen-3.0-i386.gz module /boot/vmlinuz-2.6.19-4-generic root=UUID=6b1e7d60-05d2-4aa5-b117-6909cf153ba1 ro console=tty0 module /boot/initrd.img-2.6.19-4-generic quiet savedefaultWhere:
the /boot/xen-3.0-i386.gz is the XEN hypervisor. The /boot/vmlinuz-2.6.19-4-generic is Dom0 the kernel and /boot/initrd.img-2.6.19-4-generic is its initial ramdisk. The /boot/config-2.6.19-4-generic is the xen kernel config. The /boot/System.map-2.6.19-4-generic contains the xen kernel symbols.I haven't rebooted yet, but it looks promising
Cheers, Peter.