Siddharth Wagh wrote:
Hello all,
I am a Masters student working on my thesis and have to go use Xen for
live migration purposes. I have a Xen installation on Fedora 8, and been
trying for past 3 months to create guest domains and get them running
for further migration work. I took 3 different approaches, but got stuck
with each of those. I would be very grateful if you could point out as
to where I am going wrong...
*
1. Basic command:
xm create -c vm01-config.sxp vmid=1*
The config file is kept in /etc/xen folder.
ERROR:
VFS: Cannot open root device "hd0" or unknown-block(0,0)
Please append a correct "root=" boot option
Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(0,0)
WHAT I PUT IN:
root = '/dev/hd0' or '/dev/hda' or '/dev/sda2'
None worked. I am not sure what the option should be.
*
2. Using the command:
virt-install -f /etc/xen/xen1 -r 256*
WHAT IT DOES:
Asks for config parameters and creates virtual machine, but I am not
sure how to proceed with completion process. In the install location, I
put in a OS image at a mirror site:
http://ringtail.its.monash.edu.au/pub/fedora/linux/releases/8/Fedora/i386/os/
ERROR:
Unable to find image at given location
This is the only approach which creates a VM, but the machine is not
completely running (not functional or doesnt consume any memory). Am I
supposed to have the guest image on my machine?
*3. Using "virt-manager" in GUI*
ERROR: Asks for "Connect to host network" *but "shared physical
devices" list is empty*. It is supposed to list eth0, peth0 etc.
Something to do with creating a bridge. I tried the approach of NAT, but
for that I have to use approach 1 to create a machine, which gets stuck
on "root" error.
Libvirtd is not running. It gave the message:
libvir: Remote error : Connection refused
libvir: warning : Failed to find the network: Is the daemon running ?
libvir: Remote error : Connection refused
xend is running, I checked status.
Commenting on method 2:
If you have got a iso of F8 DVD somewhere, mount it loopback on
/var/www/html/pub & start your web server
# mount -o loop F8.iso /var/www/html/pub
# service httpd start
Then you should be able to do the installation
# virt-install \
--paravirt \
--name demo \
--ram 500 \
--file /var/lib/xen/images/demo.img \
--file-size 6 \
--nographics \
--location http://ip of your web server/pub
Good luck.
Olivier
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