Re: [Xen-users] RuntimeError: domUloader

[Ralf Jansen <jansen_expedition@xxxxxxxx>]

Hi Marc,
thank you. I create loop devices with:

for ((i=8;i<=255;i+=1)); do mknod -m 660 /dev/loop$i b 7 $i; done

and use the following /boot/grub/menu.lst:

title XEN
    root (hd0,0)
    kernel /boot/xen.gz
    module /boot/vmlinuz-xen root=/dev/sda1 max_loop=255 dom0_mem=512M mem=16G vga=0x31a    resume=/dev/sda3  splash=silent showopts
    module /boot/initrd-xen

After rebooting i still have the same error-message:

Using config file "/etc/xen/vm/c14".
/dev/loop8: Kein passendes Gerät bzw. keine passende Adresse gefunden
Traceback (most recent call last):
  File "/usr/lib/xen/boot/domUloader.py", line 495, in ?
    main(sys.argv)
  File "/usr/lib/xen/boot/domUloader.py", line 481, in main
    setupDisks(disks)
  File "/usr/lib/xen/boot/domUloader.py", line 280, in
 setupDisks
    setupOneDisk(disk)
  File "/usr/lib/xen/boot/domUloader.py", line 272, in setupOneDisk
    wdisk = Wholedisk(cfg[1], physdev, loopfile)
  File "/usr/lib/xen/boot/domUloader.py", line 100, in __init__
    self.pcount   = self.scanpartitions()
  File "/usr/lib/xen/boot/domUloader.py", line 127, in scanpartitions
    self.loopsetup()
  File "/usr/lib/xen/boot/domUloader.py", line 112, in loopsetup
    raise RuntimeError("domUloader: Failure setting up loop dev")
RuntimeError: domUloader: Failure setting up loop dev
Error: Boot loader didn't return any data!
xen-Dom0-Backup:/dev #    

Regards,
Ralf


Marc Patino Gómez <mpatino@xxxxxxxxxxxx> schrieb:

Hi Ralf,

you need more loop devices. So append this to dom0 kernel: max_loop=255,

if you are using grub, edit the menu.lst and put something like:

kernel module /boot/vmlinuz-2.6-xen0 root=/dev/sda1 ro max_loop=255

if you are using udev all will work all right, if not you probably must
create the devices: /dev/loopXX

Regards,

Marc

Ralf Jansen wrote:
> Hello,
> i want to run 14 virtual Machines with xen. But i get the following
> error-message:
>
>
> xen-Dom0-Backup:/etc/xen/vm # xm list
> Name ID Mem(MiB) VCPUs State Time(s)
> Domain-0 0 14133 4 r----- 59.7
> c10 8 254 1 -b---- 13.7
> c2 1 254 1 -b---- 14.1
> c3 2 254 1 -b---- 14.0
> c5 3 254 1 ------ 14.0
> c6 4 254 1 -b---- 14.0
> c7 5 254 1 -b---- 13.9
> c8 6 254 1 -b---- 13.9
> c9 7 254 1 -b---- 13.9
> xen-Dom0-Backup:/etc/xen/vm # xm create c14
> Using config file "c14".
> /dev/loop8: Datei oder Verzeichnis nicht gefunden
> Traceback (most recent call last):
> File "/usr/lib/xen/boot/domUloader.py", line 495, in ?
> main(sys.argv)
> File "/usr/lib/xen/boot/domUloader.py", line 481, in main
> setupDisks(disks)
> File "/usr/lib/xen/boot/domUloader.py", line 280, in setupDisks
> setupOneDisk(disk)
> File "/usr/lib/xen/boot/domUloader.py", line 272, in setupOneDisk
> wdisk = Wholedisk(cfg[1], physdev, loopfile)
> File "/usr/lib/xen/boot/domUloader.py", line 100, in __init__
> self.pcount = self.scanpartitions()
> File "/usr/lib/xen/boot/domUloader.py", line 127, in scanpartitions
> self.loopsetup()
> File "/usr/lib/xen/boot/domUloader.py", line 112, in loopsetup
> raise RuntimeError("domUloader: Failure setting up loop dev")
> RuntimeError: domUloader: Failure setting up loop dev
> Error: Boot loader didn't return any data!
>
> Does someone know why i can not start more than 8 vms?
> Here is my config-file:
>
> disk = [ 'phy:/dev/sdc14,hda2,w',
> 'file:/mnt/swapspace/c14_swap.img,hda1,w' ]
> memory = 254
> vcpus = 1
> name = 'c14'
> vif = [ 'mac=00:16:3e:1b:90:14' ]
> localtime = 1
>
>
>
> extra = ' TERM=xterm'
> bootloader = '/usr/lib/xen/boot/domUloader.py'
> bootentry = 'hda2:/boot/vmlinuz-xen,/boot/initrd-xen'
>
>
> Thank you,
> r. jansen
>
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