How to install an OS with 2 installation iso file

[Daniel P. Berrangé]

On Tue, May 05, 2020 at 03:14:25PM +0100, Richard W.M. Jones wrote:
> On Sun, May 03, 2020 at 03:31:38PM +0530, Harsh chopra wrote:
> > Hi everyone,
> > I was trying to install Centos 2.1 on the virtual machine,
> 
> Ambitious!  Note that older operating systems often don't work in
> qemu, not for any particular reason but just because they don't get
> much attention and things regress, drivers in particular.  Or the
> drivers such as IDE don't emulate corners which are needed by the old
> OS.  For example I tried running some really ancient Linux versions in
> qemu a while back with no success at all.
> 
> Having said that I have run RHEL 3 recently on qemu and that's fairly
> similar to 2.1.
> 
> > the installation
> > was complete 50% but then it asked to insert the second installation iso
> > file.
> > i.e. "Please insert disc 2 in cdrom"
> > I tried to change the XML file and insert the line
> > <source file = "/home/..."/>
> > under device name  but nothing helped.
> 
> When you say you "tried to change the XML file" - how did you do that?
> You should use ‘virsh edit <guest>’ only, and not attempt to edit any
> XML file directly.  Or of course you can use virt-manager as the other
> reply suggested - it essentially does the same thing as virsh edit.

Actually "virsh edit" is not what you need in this case.

That will update the persistent XML config only.

For a multi-stage installer, you need to perform a CD media change
in the live VM. IIRC the following should work:

  $ virsh change-media $GUESTNAME /dev/hdc --update /path/to/iso

This is equivalent to using  "--eject" followed by "--insert /path/to/iso"


Regards,
Daniel
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