Xen project Mailing List

Shane

On Fri, Apr 20, 2012 at 1:41 AM, Xavier Cardil <cardil.xavier@xxxxxxxxx> wrote:

Hi Shane, I think I got the answer ... http://serverfault.com/questions/128145/linux-virtualization-options-on-ec2

:) Thank you all for your time !

-Xavier

On Thu, Apr 19, 2012 at 7:43 PM, Shane Johnson <sdj@xxxxxxxxxxxxxxxxxxxxxx> wrote:

Xavier,
Yours looks considerably different from mine :

menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-xen-amd64 and XEN 4.0-amd64' --class debian --class gnu-linux --class gnu --class os --class xen {

insmod lvm
insmod part_msdos
insmod part_msdos
insmod ext2
set root='(vg-sys)'
search --no-floppy --fs-uuid --set bf38b210-e546-45d5-b10d-722f6743761b
echo 'Loading Linux 2.6.32-5-xen-amd64 ...'
multiboot /boot/xen-4.0-amd64.gz placeholder

module /boot/vmlinuz-2.6.32-5-xen-amd64 placeholder root=/dev/mapper/vg-sys ro quiet
echo 'Loading initial ramdisk ...'
module /boot/initrd.img-2.6.32-5-xen-amd64

}

I don't know if it's from a different version or grub(I am running grub2) or if your grub isn't picking up the other kernel options when update-grub is run. I would look into those areas first.

I am also wondering if it might be a issue attributed to running this off of a already virtualized set up from Amazon. I would look through your logs to see if there are any error messages about unsupported cpu or other hardware.

I am unfortunately running into the limits of my experience with this. I have two physical servers currently running squeeze and Xen and are working pretty good, but I am also looking at transitioning to a different distro because of a few things that the older kernels from Debian just are not able to provide.

Something I had to learn early on posting on this list, and still have issues remembering. This list doesn't provide the list itself as the sender, just the person that posted or replied. Please use reply-all so that all of the correspondence can be posted to the archive so that if someone in the future is searching out a similar problem the will have that to use as a resource.

Thank you.

Shane

On Thu, Apr 19, 2012 at 10:18 AM, Xavier Cardil <cardil.xavier@xxxxxxxxx> wrote:

Of coruse Shane, here you are :

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub

#

### BEGIN /etc/grub.d/40_custom ###
default 0
timeout 1
title 2.6.32-5-xen-amd64
root (hd0)
kernel /boot/vmlinuz-2.6.32-5-xen-amd64 root=/dev/xvda1 ro

initrd /boot/initrd.img-2.6.32-5-xen-amd64
### END /etc/grub.d/40_custom ###

I created a new AMI now and I just installed the packages and copied the grub.cfg to show it to you ...

-Xavier

On Thu, Apr 19, 2012 at 6:08 PM, Shane Johnson <sdj@xxxxxxxxxxxxxxxxxxxxxx> wrote:

From my experience with squeeze, this sounds like it isn't loading the qemu-dm portion. Can you post a copy of your /boot/grub/grub.cfg?

Thanks
Shane

On Thu, Apr 19, 2012 at 9:28 AM, Xavier Cardil <cardil.xavier@xxxxxxxxx> wrote:

Hello Shane ! Yes, all packages installed. Is Xen-4.0-amd64.gz a bootable kernel ? Right now, the system si booting this one : vmlinuz-2.6.32-5-xen-amd64 and this initrd: initrd.img-2.6.32-5-xen-amd64 as you can see on the menu.lst file.

On Thu, Apr 19, 2012 at 4:48 PM, Shane Johnson <sdj@xxxxxxxxxxxxxxxxxxxxxx> wrote:

Xavier,
First place I would start it running the following :

aptitude search xen-utils
Make sure xen-utils is installed (i in the far left column)

aptitude search qemu-dm
again making sure the package is installed.

If both packages are installed I would make sure you are booting off the the version that says :

Debian GNU/Linux, with Linux 2.6.32-5-xen-amd64 and XEN 4.0-amd64

Shane

On Thu, Apr 19, 2012 at 6:07 AM, Xavier Cardil <xavier@xxxxxxxx> wrote:

Hello ! I'm trying to run Xen on a EC2 AMI

debian-6.0-squeeze-base-x86_64-20110417 (ami-35b68141)

Following this how-to http://www.howtoforge.com/paravirtualization-with-xen-4.0-on-debian-squeeze-amd64

After installing the packages, I get :

uname -a
Linux ip-10-241-22-60 2.6.32-5-xen-amd64 #1 SMP Tue Mar 8 00:01:30 UTC 2011 x86_64 GNU/Linux

uname -r
2.6.32-5-xen-amd64

Then I do : mv /etc/grub.d/10_linux /etc/grub.d/50_linux
update-grub2

After I reboot but I get this when calling xm :

xm dmesg
WARING! Can't find version 3.4 of xen utils, fallback to default version!
Error: Unable to connect to xend: No such file or directory. Is xend running?

When I execute xend I get :

xend
WARING! Can't find version 3.4 of xen utils, fallback to default version!
ERROR Internal error: Could not obtain handle on privileged command interface (2 = No such file or directory)

Traceback (most recent call last):
File "/usr/lib/xen-default/bin/xend", line 38, in <module>
from xen.xend.server import SrvDaemon
File "/usr/lib/xen-4.0/lib/python/xen/xend/server/SrvDaemon.py", line 26, in <module>

import relocate
File "/usr/lib/xen-4.0/lib/python/xen/xend/server/relocate.py", line 28, in <module>
from xen.xend import XendDomain
File "/usr/lib/xen-4.0/lib/python/xen/xend/XendDomain.py", line 36, in <module>

from xen.xend import XendOptions, XendCheckpoint, XendDomainInfo
File "/usr/lib/xen-4.0/lib/python/xen/xend/XendCheckpoint.py", line 20, in <module>
from xen.xend import balloon, sxp, image

File "/usr/lib/xen-4.0/lib/python/xen/xend/image.py", line 46, in <module>
xc = xen.lowlevel.xc.xc()
xen.lowlevel.xc.Error: (1, 'Internal error', 'Could not obtain handle on privileged command interface (2 = No such file or directory)')

Does this has to do with the kernel I'm booting ?

My /boot looks like this :

System.map-2.6.32-5-xen-amd64

initrd.img-2.6.32-5-xen-amd64

config-2.6.32-5-xen-amd64

vmlinuz-2.6.32-5-xen-amd64

grub

xen-4.0-amd64.gz

And my menu.lst looks like this :

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates

# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/40_custom ###
default 0
timeout 1
title 2.6.32-5-xen-amd64
root (hd0)

kernel /boot/vmlinuz-2.6.32-5-xen-amd64 root=/dev/xvda1 ro
initrd /boot/initrd.img-2.6.32-5-xen-amd64
### END /etc/grub.d/40_custom ###

I have been trying to get around this but ... nothing works !

Any help would be much appreciated, thanks in advance !

-Xavier

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--
Shane D. Johnson
IT Administrator
Rasmussen Equipment

--
Shane D. Johnson
IT Administrator
Rasmussen Equipment

--
Shane D. Johnson
IT Administrator
Rasmussen Equipment

--
Shane D. Johnson

IT Administrator

Rasmussen Equipment

Re: [Xen-users] Xen on EC2 | Debian Squeeze AMD 64