Re: [Xen-users] Can't find root when start vm

[Erwan RENIER <erwan.renier@xxxxxxxxxxx>]

Le 10/02/2011 16:06, Jose Legido a écrit :
> On 10/02/11 12:18, Erwan RENIER wrote:
> > Le 10/02/2011 11:35, Jose Legido a écrit :
> > > On 10/02/11 11:13, James Harper wrote:
> > > > > Hello.
> > > > > I can't start Virtual Machine, have the message:
> > > > >    Waiting for root file system ... done.
> > > > > Gave up waiting for root device.  Common problems
> > > > > .....
> > > > > ALERT!  /dev/xvda2 does not exist.  Dropping to a shell!
> > > > >
> > > > > I have installed Xen 4 in a debian squeeze:
> > > > > # uname -a
> > > > > 2.6.32-5-xen-amd64 #1 SMP Wed Jan 12 05:46:49 UTC 2011 x86_64
> > > > GNU/Linux
> > > > > xen-hypervisor-4.0-amd64                4.0.1-2
> > > > The
> > > > > Xen Hypervisor on AMD64
> > > > >
> > > > > I have created the virtual machine with this command:
> > > > > # xen-create-image --size=2Gb --swap=128Mb --dhcp --dist=stable
> > > > > --dir=/home/xen --hostname=debian
> > > > >
> > > > > My debian.cfg is:
> > > > > kernel      = '/boot/vmlinuz-2.6.32-5-xen-amd64'
> > > > > ramdisk     = '/boot/initrd.img-2.6.32-5-xen-amd64'
> > > > > vcpus       = '1'
> > > > > memory      = '128'
> > > > > root        = '/dev/xvda2 ro'
> > > > > disk        = [
> > > > >                     'file:/home/xen/domains/debian2/disk.img,xvda2,w',
> > > > >                     'file:/home/xen/domains/debian2/swap.img,xvda1,w',
> > > > >                 ]
> > > > > on_poweroff = 'destroy'
> > > > > on_reboot   = 'restart'
> > > > > on_crash    = 'restart'
> > > > >
> > > > > In my Server the filesystem is /dev/sda1.
> > > > > I have tried with:
> > > > > root        = '/dev/xvda1 ro'
> > > > > root        = '/dev/sda1 ro'
> > > > > root        = '/dev/sda2 ro'
> > > > >
> > > > > And the same problem
> > > > >
> > > > > In the /dev vm I have:
> > > > > (initramfs) ls /dev
> > > > > char console core cpu_dma_latency fd full hvc0 hvc1 hvc2 hvc3 hvc4
> > > > hvc5
> > > > > hvc6 hvc7 input kmsg mapper mem network_latency network_throughput
> > > > null
> > > > > port psaux ptmx pts random snapshot ttyx urandom vcs vcs1 vcsa vcsa1
> > > > > vga_arbiter xen zero
> > > > >
> > > > > I have tried with vcs vcs1 vcsa vcsa1 but have the error:
> > > > > mount: mounting /dev/vcs1 on /root failed: No such file or directory
> > > > >
> > > > > Any idea? I'm making wrong something?
> > > > >
> > > > > A lot of thanks!
> > > > Does /dev/xvda1 exist?
> > > No, only vcs, vcsa and sda
> > > > Is the frontend block device driver compiled as a
> > > > module?
> > > I have installed xen from aptitude install. I didn't configured frontend
> > > block device driver, should I?
> > > > James
> > > _______________________________________________
> > > Xen-users mailing list
> > > Xen-users@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-users
> > Hi , what's in the log of the vm ( like
> > /var/log/xen/qemu-dm-debian.log ) ?
> > And in the xend.log ?
> Hello, I can't see nothing in the logs. I upload in ompldr.org:
> http://ompldr.org/vN2Ridg/domain-builder-ng.log
> http://ompldr.org/vN2Ridw/xend.log
>
>
> Thanks!
it indeed create your disks as vcsa1 and vsca2 :

 createDevice: vbd : {'uuid': 'c5fb4564-05e6-8323-97f6-1ecbc43ab0f8', 
'bootable': 1, 'driver': 'paravirtualised', 'dev': 'vcsa1', 'uname': 
'file:/home/xen/domains/debian2/disk.img', 'mode': 'w'}


Here's one of mine :

createDevice: vbd : {'uuid': 'feaa1b2d-3017-e010-ec5d-2a612826e5bd', 
'bootable': 0, 'driver': 'paravirtualised', 'dev': 'xvdb1', 'uname': 
'phy:vg0/erp5', 'mode': 'w'}
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