Re: [Xen-users] Re: upgrade leny-squeeze, xen3.2-xen4.0, what's wrong?

[Henrik Langos <hlangos@xxxxxxxxxxxxxx>]

Hi Mauro,

It would be more useful if you had included the /etc/xen/mail1.cfg
as that is the file ultimately used to create the domU. The xen-tools.conf
is just a tool that does a some (actually quite good) work for you by 
creating that file and the disk/partition volumes. xen-tools is not involved
in *running* those VMs though.


On Fri, Feb 11, 2011 at 08:11:27AM +0000, Mauro wrote:
> On 10 February 2011 08:16, Mauro <mrsanna1@xxxxxxxxx> wrote:
> > I am running a Debian Squeeze Xen 4.0.1 Hypervisor and 2.6.32-5-xen-amd64 
> > dom0.
> > My xen-tools.conf:
> >
> > lvm = vg00
> > size   = 100Gb      # Disk image size.
> > memory = 2048Mb    # Memory size
> > swap   = 2G    # Swap size
> > # noswap = 1      # Don't use swap at all for the new system.
> > fs     = ext4     # use the EXT3 filesystem for the disk image.
> > dist   = `xt-guess-suite-and-mirror --suite` # Default distribution to 
> > install.
> > image  = sparse   # Specify sparse vs. full disk images.
> >
> > gateway    = 172.16.10.1
> > netmask    = 255.255.255.0
> > broadcast  = 172.16.10.255
> >
> > kernel = /boot/vmlinuz-`uname -r`
> > initrd = /boot/initrd.img-`uname -r`
> >
> > arch = amd64
> > mirror = `xt-guess-suite-and-mirror --mirror`
> >
> > ext4_options     = noatime,nodiratime,errors=remount-ro
> > ext2_options     = noatime,nodiratime,errors=remount-ro
> > xfs_options      = defaults
> > reiserfs_options = defaults
> > btrfs_options    = defaults
> >
> > # serial_device = hvc0 #default
> > # serial_device = tty1
> > #
> > # disk_device = xvda #default
> > # disk_device = sda
> >
> > then I run as usual:
> > xen-create-image --hostname mail1 --ip 172.16.10.154 --vcpus 4 --role
> > udev --dist squeeze
> >
> > at the end of domU creation I run xm console mail1 but here is what I see:
> >
> > Begin: Waiting for root file system ... done.
> > Gave up waiting for root device.  Common problems:
> >  - Boot args (cat /proc/cmdline)
> >   - Check rootdelay= (did the system wait long enough?)
> >   - Check root= (did the system wait for the right device?)
> >  - Missing modules (cat /proc/modules; ls /dev)
> > ALERT!  /dev/xvda2 does not exist.  Dropping to a shell!
> >
> > Arghhhhhhh!!!!!!
> > I think there is nothing wrong in my creation procedure, I have a lot of
> > DomU with debian lenny and xen3.2.
> > Perhaps ext4 isn't supported?
> > Help please.

My (wild) guess on this would be that you'd have to change the "root=" parameter
in your config file to point to some "sda*" device/partition instead of "xvda*".

root = "/dev/xvda2"
to
root= "/dev/sda2"


Alternatively you'd have to change the "disk=" parameters to map your LVs to 
xdva*
instead of sda*.

disk        = [
                  'phy:/dev/vg00/mail1-swap,sda1,w',
                  'phy:/dev/vg00/mail1-disk,sda2,w',
              ]
to
disk        = [
                  'phy:/dev/vg00/mail1-swap,xvda1,w',
                  'phy:/dev/vg00/mail1-disk,xvda2,w',
              ]

 
> I've solved using pygrub.
> So it seems that without pygrub I can't run DomUs?

You shouldn't have to use pygrub for something that simple.

My guess is that there was a lack of communication between the 
maintainers of xen and xen-tools in regard to the default devices.

cheers
-henrik



_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users