Re: [Xen-users] how to mount domU images on dom0

[Tapas Mishra <tapas@xxxxxxxxxxxx>]

Thanks a lot for the reply by the time you replied luckily without any
logical reason the xm console mydomU had booted
then I executed
apt-get install ubuntu-desktop linux-image-virtual lvm2 user-setup
it took an hour to do a lot of downloads and since then it has been
setting up a lot of things which I feel are the desktop environments
of \
Ubuntu since you mentioned Debian so I am curious to know in terms of
stability since today only I was able to finish downloading all my
DVDs of Debian so in terms of stability did you felt it better than
Ubuntu or any other distribution if I talk about Xen

On Mon, Nov 16, 2009 at 11:13 PM, Thomas Jensen
<tom.jensen@xxxxxxxxxxxxxxxxxxxxxx> wrote:
> On Mon, 16 Nov 2009 21:42:50 +0530, Tapas Mishra <tapas@xxxxxxxxxxxx>
> wrote:
>> I am installing domU image
>>
>> after executing the following command
>>
>> xen-create-image --hostname=mydomU --ip 192.168.1.22 --gateway
>> 192.168.1.250 --netmask 255.255.255.0 --broadcast 192.168.1.255
>> --dist=jaunty  --mirror=http://archive.ubuntu.com/ubuntu --size=4Gb
>> --memory=64Mb --swap=128MB --arch=i386 --partitions=with-data  --boot
>> --passwd --role udev
>>
>>
>> I get following message at the last
>>
>>
>>
>> Creating ext3 filesystem on /workarea/xen/domains/mydomU/data.img
>> Done
>> Installation method: debootstrap
>> Done
>>
>> Running hooks
>> Done
>>
>> Role: udev
>>       File: /etc/xen-tools/role.d/udev
>> Role script completed.
>>
>> Creating Xen configuration file
>> Done
>> Setting up root password
>> Enter new UNIX password:
>> Retype new UNIX password:
>> passwd: password updated successfully
>> All done
>> root@abhitech-desktop:~# Started new Xen guest: mydomU
>> [/etc/xen/mydomU.cfg]
>>
>>
>> Logfile produced at:
>>        /var/log/xen-tools/mydomU.log
>>
>> Now here is the problem since the terminal on which it happened cursor
>> is blinking it is not even giving me the shell to log in or execute
>> any command so someone on IRC suggested me to mount the images
>>
> I too started out using Xen with Ubuntu for both Dom0 and DomU machines.
> At the time, I was using the Ubuntu 8.04 LTS version and used the distro
> specific install through apt-get.  Anyhow, I encountered a lot of problems
> with console logins.  After searching the Internet, I found I wasn't alone.
> I discovered a lot of patches required to fix login issues as well as
> problems with the shutdown of Ubuntu domains.  You have mentioned both of
> these problems in your recent posts.
>
> I have sinced moved to Debian Lenny for Dom0 and all DomU machines.  That
> change has made a huge difference in the stability I have experienced with
> Xen.
>
> However, I still had to add configuration variables to my config files to
> ensure the console matches between Xen and my Debian virtual machine.  The
> instructions I used were on the Xen wiki website and was listed as a known
> issue with Debian.
>
> Despite those configuration changes, I sometimes still see the blank
> console as you described when using the xm console command.  Whenever this
> occurs, I simply hit the enter key on the keyboard and the login prompt
> shows up on my console.
>
> It is by no means scientific and I don't have a technical explanation for
> why this occurs.  But it works and that is good enough for me in most
> situations.
>>
>> Before I do that  xm list shows me the following output
>>
>> root@abhitech-desktop:~# xm list
>> Name                                        ID   Mem VCPUs      State
>> Time(s)
>> Domain-0                                     0   364     1     r-----
>> 2547.1
>> mydomU                                       2    64     1     -b----
>
>> 9.5
>> root@abhitech-desktop:~#
>>
>>
>> and if I execute xm console mydomU then it gave me erro mydomU is not
>> installed where as
>> in the domains directory I have
>> root@abhitech-desktop:/workarea/xen/domains/mydomU# ls
>> data.img  root.img  swap.img
>> all the above files whose sizes are
>>
>> root@abhitech-desktop:/workarea/xen/domains/mydomU# du -ch ./*
>> 194M  ./data.img
>> 719M  ./root.img
>> 4.0K  ./swap.img
>> 913M  total
>>
> I also started out using disk image files.  I have sinced moved to using
> logical partitions through LVM for my DomU disks.  It is very easy to mount
> these logical volumes in Dom0 with the mount command.  Mounting should be
> done when the DomU is not running.  One mounted, you can edit files for the
> DomU from the Dom0 console.
>>
>> Now how should I proceed
>> console is not letting me log in inspite of my repeated attempts
>>
>>
>>
>>
>>
>>
>> On Mon, Nov 16, 2009 at 9:24 PM, Arpan Jindal <jindalarpan@xxxxxxxxx>
>> wrote:
>>> can you explain it in details what are you doing and where you are
> facing
>>> this issue?
>>>
>>> On Mon, Nov 16, 2009 at 9:22 PM, Tapas Mishra <tapas@xxxxxxxxxxxx>
> wrote:
>>>>
>>>> how to mount the domU images on dom0 to chroot them
>>>>  mount it on the dom0 and chroot to it.  I am getting an error xen
>>>> console mydomU
>>>>
>>>> _______________________________________________
>>>> Xen-users mailing list
>>>> Xen-users@xxxxxxxxxxxxxxxxxxx
>>>> http://lists.xensource.com/xen-users
>>>
>>>
>>
>> _______________________________________________
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>

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