[one-users] [one users] Error cannot access to the VM

Le Nguyen Thach nevilarus at gmail.com
Thu Oct 8 02:25:16 PDT 2009

I follow the guide on OpenNebula Site to install and config OpenNebula in my
small Cluster. I have just two node, one acts as a front-end and one acts as
cluster node. I use Ubuntu Jaunty Server Edition and Xen. Everything seemed
going well . I've got  result like this:

ID     NAME STAT CPU     MEM        HOSTNAME        TIME
     25     vm04 runn   0  262144 00 00:55:13
My VNet template:

NAME   = "Public"
BRIDGE = eth0
LEASES = [IP=,MAC=50:20:20:20:20:20]

My VM template:

NAME   = vm04
CPU    = 0.5
MEMORY = 256

OS      = [
        kernel = "/boot/vmlinuz-2.6.28-11-server",
        initrd = "/boot/initrd.img-2.6.28-11-server",
        root   = "sda1" ]

DISK   = [
  source   = "/var/lib/one/images/feisty_base.img",
  target   = "sda1",
  readonly = "no" ]
NIC    = [ NETWORK = "Public" ]

GRAPHICS = [type="vnc",listen="",port="-1"]

But I cannot access to the VM by using SSH. At first, I think my problem is
in my network config. But when I log on to the cluster-node and tried 2
access to the VM, I got:

$ sudo xm list

Name                                        ID   Mem VCPUs      State
Domain-0                                     0   489     4     r-----
one-25                                      13   256     1     -b----

$ sudo xm console 13
[    0.346661] XENBUS: Device with no driver: device/vkbd/0
[    0.346677] XENBUS: Device with no driver: device/vfb/0
[    0.346689] XENBUS: Device with no driver: device/vbd/2049
[    0.346701] XENBUS: Device with no driver: device/vif/0
[    0.346713] XENBUS: Device with no driver: device/console/0
[    0.346755]   Magic number: 1:252:3141
[    0.346815] /build/buildd/linux-2.6.28/drivers/rtc/hctosys.c: unable to
rtc device (rtc0)
[    0.346835] BIOS EDD facility v0.16 2004-Jun-25, 0 devices found
[    0.346849] EDD information not available.
[    0.347988] Freeing unused kernel memory: 548k freed
[    0.350884] Write protecting the kernel text: 4184k
[    0.351931] Write protecting the kernel read-only data: 1552k
Loading, please wait...
Couldnt get a file descriptor referring to the console
Begin: Loading essential drivers... ...
Begin: Running /scripts/init-premount ...
Begin: Mounting root file system... ...
Begin: Running /scripts/local-top ...
Begin: Waiting for root file system... ...
[   10.990061] XENBUS: Timeout connecting to device: device/vbd/2049 (state
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/sda1 does not exist. Dropping to a shell!

I think my VM cannot boot, so It has nothing to do with the network.
I don't know what's wrong here. I'm newbie in computer network and system.I
appreciate any helps.

Btw, I'm stil confused about some attributes in the VM template : the kernel
and initrd of OS point to the kernel on the host machine or VM image file ?
The target of DISK must be the same in /etc/fstab (in VM image file) ? I 've
searched over the Internet and someone say root of OS and target of DISK
must be the same ?
Can anyone explain it for me ?

Thanks & Regards,
Le Nguyen Thach
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