RE: [Xen-users] Can not start Guest, receiving errors

["Octavian Teodorescu" <octav@xxxxxxxxxxxxxxxx>]

Ok so I have done the following:
config of ns1 guest domain:
--------------
kernel = "/boot/vmlinuz-2.6.18-8.1.4.el5xen"
builder='linux'

memory = 384
name = "ns1"

# List of which CPUS this domain is allowed to use, default Xen picks
#cpus = ""         # leave to Xen to pick
#cpus = "0"        # all vcpus run on CPU0
#cpus = "0-3,5,^1" # run on cpus 0,2,3,5
vcpus = 1

#vif = [ 'mac=FE:FF:FF:FF:FF:FF , ip=139.185.48.214, 'bridge=xenbr1' ]
vif = [ '', 'bridge=xenbr1' ]

disk = [ 'phy:/dev/VGvhosts/root.ns1,hda1,w',
         'phy:/dev/VGvhosts/swap.ns1,hda2,w' ]

dhcp="dhcp"

# Set root device.
root = "/dev/hda1"
#bootloader="/usr/bin/pygrub"
------------

and I still have the following error message when I run xm create ns1 -c:
------------
TCP bic registered
Initializing IPsec netlink socket
NET: Registered protocol family 1
NET: Registered protocol family 17
XENBUS: Device with no driver: device/vbd/769
XENBUS: Device with no driver: device/vbd/770
XENBUS: Device with no driver: device/vif/0
XENBUS: Device with no driver: device/vif/1
md: Autodetecting RAID arrays.
md: autorun ...
md: ... autorun DONE.
VFS: Cannot open root device "hda1" 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)
------------
I have also installed the base CentOS packages on root.ns1 with yum.

Any idea of what's wrong now?
Thanks for the last answer, I quite understood some things much better.


>>
>>
>>> -----Original Message-----
>>> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
>>> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of
>>> Octavian Teodorescu
>>> Sent: 29 May 2007 12:15
>>> To: xen-users@xxxxxxxxxxxxxxxxxxx
>>> Subject: [Xen-users] Can not start Guest, receiving errors
>>>
>>> Hi guys,
>>>
>>> I have a CentOS installed on my system (P4- core2duo, sata
>>> hard drive). At
>>> installation I have also installed the Virtualization package which
>>> installed xen, and made the boot record for xen.
>>>
>>> I realized that I don't have kernel-xen0 and kernel-xenU as I had in
>>> Fedora (fedora was another unlucky experience with xen). My grub.conf:
>>> =================
>>> default=0
>>> timeout=5
>>> splashimage=(hd0,0)/boot/grub/splash.xpm.gz
>>> hiddenmenu
>>> title CentOS (2.6.18-8.1.4.el5xen)
>>> root (hd0,0)
>>> kernel /boot/xen.gz-2.6.18-8.1.4.el5
>>> module /boot/vmlinuz-2.6.18-8.1.4.el5xen ro root=LABEL=/ rhgb quiet
>>> module /boot/initrd-2.6.18-8.1.4.el5xen.img
>>> title CentOS (2.6.18-8.el5xen)
>>> root (hd0,0)
>>> kernel /boot/xen.gz-2.6.18-8.el5
>>> module /boot/vmlinuz-2.6.18-8.el5xen ro root=LABEL=/ rhgb quiet
>>> module /boot/initrd-2.6.18-8.el5xen.img
>>> ===========
>>> The dom0 boots ok, and I didn't had any problems with it.
>>> Xend is started.
>>>
>>> I am tring to create a virtual machine (initially I wanted to install
>>> FreeBSD, but I've read just before posting that can not be
>>> paravirtualized, so I'll use another version of linux or the same).
>>> I have the following config file called linux:
>>
>> Is this supposed to be a para-virtual or a HVM (fully virtualized)
>> domain - your config file seems a bit like a mix of the two.
>>
>> Is this a different config than the one below?
>>> ------------------
>>> #kernel = "/boot/vmlinuz-2.6.10-xenU"
>>> kernel = "/boot/vmlinuz-2.6.18-8.1.4.el5xen"
>>>
>>> # The domain build function. Default is 'linux'.
>>> builder='linux-test'
>>
>> As far as I'm aware, the only valid choices here are: "linux",
>> "hvmbuilder" and (I think) "solaris". You can't introduce your own
>> "builder" option without many changes to the tools chain involved in
>> domain creation.
>>>
>>> memory = 512
>>>
>>> name = "bsd"
>>
>> Probably not what you wanted, but works OK.
>>>
>>> # List of which CPUS this domain is allowed to use, default Xen picks
>>> #cpus = "" # leave to Xen to pick
>>> #cpus = "0" # all vcpus run on CPU0
>>> #cpus = "0-3,5,^1" # run on cpus 0,2,3,5
>>> vcpus = 1
>>>
>>> vif = [ '', 'bridge=xenbr1' ]
>>>
>>> device_model = '/usr/lib64/xen/bin/qemu-dm'
>>
>> Don't need a device-model if you're not using HVM.
>>>
>>> disk = [ 'phy:/dev/VGvhosts/root,hda1,w',
>>> 'phy:/dev/VGvhosts/swap,hda2,w',
>>> 'phy:/dev/VGvhosts/tmp,hda3,w' ]
>>> # 'phy:/dev/VGvhosts/var,hda4,w' ]
>>>
>>> dhcp="dhcp"
>>>
>>> # Set root device.
>>> root = "/dev/hda1"
>>>
>>>
>>> cdrom = "/home/admn/iso/6.2-RELEASE-i386-disc1.iso"
>>
>> Can't boot from CDROM if you're not using HVM.
>>
>>> boot = "dc"
>>
>> Likewise, "boot" and "root" are sort of equivalent for "HVM" and "PV"
>> domains - they both say where to boot from, "boot" is for HVM domains,
>> "root" is for "PV" domains (it's passed to the kernel that you're
>> loading).
>>>
>>> [root@octavpc1 xen]# mcedit linux
>>>
>>> [root@octavpc1 xen]# cat linux
>>> #kernel = "/boot/vmlinuz-2.6.10-xenU"
>>> kernel = "/boot/vmlinuz-2.6.18-8.1.4.el5xen"
>>>
>>> # The domain build function. Default is 'linux'.
>>> builder='linux'
>>
>> Correct.
>>>
>>> memory = 512
>>>
>>> name = "linux-test"
>>
>> That's better.
>>>
>>> # List of which CPUS this domain is allowed to use, default Xen picks
>>> #cpus = "" # leave to Xen to pick
>>> #cpus = "0" # all vcpus run on CPU0
>>> #cpus = "0-3,5,^1" # run on cpus 0,2,3,5
>>> vcpus = 1
>>>
>>> vif = [ '', 'bridge=xenbr1' ]
>>>
>>> device_model = '/usr/lib64/xen/bin/qemu-dm'
>>
>> Still shouldn't use device-model.
>>>
>>> disk = [ 'phy:/dev/VGvhosts/root,hda1,w',
>>> 'phy:/dev/VGvhosts/swap,hda2,w',
>>> 'phy:/dev/VGvhosts/tmp,hda3,w' ]
>>> # 'phy:/dev/VGvhosts/var,hda4,w' ]
>>>
>>> dhcp="dhcp"
>>>
>>> # Set root device.
>>> root = "/dev/hda1"
>>>
>>>
>>> cdrom = "/home/admn/iso/6.2-RELEASE-i386-disc1.iso"
>>> boot = "dc"
>> And still can't boot from CDROM in PV mode.
>>> ----------------------
>>>
>>>
>>> When I do a xm create -c linux, I see the vm booting (at
>>> least that's what
>>> I think it's doing) and I receive an error. Here are the last
>>> line of what
>>> I see on my screen:
>>> ----------------
>>> Initializing IPsec netlink socket
>>> NET: Registered protocol family 1
>>> NET: Registered protocol family 17
>>> XENBUS: Device with no driver: device/vbd/769
>>> XENBUS: Device with no driver: device/vbd/770
>>> XENBUS: Device with no driver: device/vbd/771
>>> XENBUS: Device with no driver: device/vif/0
>>> XENBUS: Device with no driver: device/vif/1
>>> md: Autodetecting RAID arrays.
>>> md: autorun ...
>>> md: ... autorun DONE.
>>> VFS: Cannot open root device "hda1" or unknown-block(0,0)
>>
>> Does "/dev/hda1" contain a vaild filesystem?
>>
>> --
>> Mats
>>> Please append a correct "root=" boot option
>>> Kernel panic - not syncing: VFS: Unable to mount root fs on
>>> unknown-block(0,0)
>>>
>>>
>>> If I try to mount the logical volumes, I get:
>>> --------------------
>>> Using config file "./linux".
>>> Error: destroyDevice() takes exactly 3 arguments (2 given)
>>> ----------------------
>>> I tried to change from hda to sda, I have also tried sda3 for
>>> all of them
>>> since my disk looks like this:
>>> sda1 - / -30GB
>>> sda2 - swap -3,5GB
>>> sda3 - lvm - 209GB
>>> On the lvm I have the following partitions formated as ext3:
>>> root, var,
>>> tmp and .... swap.
>>>
>>> I know I have the image of a bsd cd know (I'll make an image
>>> of a linux
>>> and use that instead), but it should at least boot! Right?
>>>
>>> So I tried a lot of Google and couldn't find an answer to my
>>> problem. This
>>> is my first time with xen. Can U please help me?
>>>
>>> Thanks in advance.
>>>
>>>
>>> _______________________________________________
>>> Xen-users mailing list
>>> Xen-users@xxxxxxxxxxxxxxxxxxx
>>> http://lists.xensource.com/xen-users
>>>
>>>
>>>
>>
>>
>>



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