Re: [Xen-users] how to add Additional Domain

[Jeremy Fang <balanceinfotech@xxxxxxxxx>]

Hi Andrew:

 

Finally I am able to install one Guest OS on my xen machine which is running RedHat 8.0 after I install /dev/sda2 partition first and than install Redhat enterprise version 3 on /dev/sda1 which is my xen machine.

 

In addition, I find a way to play with Grub to be able to choose which OS to boot  after installing multiple OSs in a server. Here is what I found out and hope someone else can

teke it as s reference if it is helpful.

 

Get to the grub> prompt first. There are two ways to do it,

 1) following the grub display menu while you boot the server. There are commands such as

     e for editing, c for going to grub command prompt

 

 or

 2) after booting the sever, you can type grub command which will lead you to

    grub prompt

 

while in grub>, you can do find /sbin/init

                                       find /vmlinuz

                                       find /boot/vmlinux

 

which will list all the boot partition info.

 

e.g.  In my case, I will have two entires

      (hd0,0)  which matches to /dev/sda1  (my RedHat Enterprise version 3)

      (hd0,1)  which matches to /dev/sda1  (my RedHat 8.0)

 

to choose which to boot first, you can do the following steps:

e.g. If to choose RedHat 8.0 boot first as an example:

 

grub> root (hd0,1)

grub> setup (hd0)

grub> reboot

 

# reboot the machine

 

You will see RedHat 8.0 Grub will be showing during the boot process.

 

I will be working on the put RedHat 7.2 on the xen machine as my second Guest OS ...

 

I hope you will figure out your Error 17 problem soon.

 

Thank you again, Andrew !

 

Jeremy

Andrew Thompson <andrewkt@xxxxxxxxxxx> wrote:

> Andrew Thompson wrote:
> > At this point, you should know definatively what bootloader you're 
> > using. Run to another computer and google that bootloader.
> > 
> > Your next step is to convince your bootloader to boot with /dev/sda1 as 
> > root instead of /dev/sda8.
> > 
> > You should hopefully see a list of your possible OS'es to boot(it will 
> > probably only show one, even though we all know you now have two.) With 
> > LILO, I believe you just type on the commandline the name of the 
> > instance you want to load then follow it with root=/dev/sda1
> > 
> > I've only had GRUB since I started using Xen, so I don't recall exactly 
> > what it looks like, but basically you need to tell it where a kernel is 
> > it can boot, and what partition to boot as /(root). Fortunately, GRUB 
> > can look into filesystems and help
>  you with filename completion for th 
> > kernel.
>
> Oh, forgot to mention. This is a one-time fix. You should use whatever 
> method is prescribed by the bootloader on your machine to permanently 
> convince it to boot to /dev/sda1.
>
> I think GRUB is required for Xen, so go ahead and get it set up and 
> configured there.
>
> Being able to boot another partition is useful, but not necessary. It 
> might not be a bad idea to keep a bootable kernel in the /boot of 
> another partition. That way with a boot disk, you can boot to that 
> partition if you hose your main install.
>
> Make sure you're moderately happy with the partition scheme you've 
> configured. I am currently minus my home Xen box because I used parted 
> to redo my partitions and now GRUB just gives "Error 17" or something 
> like that... I hope to straighten that out tonight.
>
> -- 
> Andrew Thompson
> http://aktzero.com/
> begin:vcard
> fn:Andrew
>  Thompson
> n:Thompson;Andrew
> email;internet:andrewkt@xxxxxxxxxxx
> x-mozilla-html:FALSE
> url:http://aktzero.com/
> version:2.1
> end:vcard

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