Re: [Xen-users] [Xen-API] Installing XCP from USB thumb drive

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2012-06-22 at 12:51 +0100, Mike McClurg wrote:
> On 22/06/12 12:18, Anil Madhavapeddy wrote:
> > On 22 Jun 2012, at 12:12, Mike McClurg wrote:
> >
> >> On 22/06/12 11:59, Ian Campbell wrote:
> >>> On Fri, 2012-06-22 at 11:27 +0100, Mike McClurg wrote:
> >>>> On 21/06/12 00:05, Eric wrote:
> >>>>> Is CD-ROM/DVD-ROM the only way to install XCP?
> >>>>
> >>>> I'm sure you could dd the iso to a thumb drive in the same way you would
> >>>> any other OS.
> >>>
> >>> This depends on the iso having being created with special options though
> >>> -- is that done for XCP isos?
> >>
> >> I have no idea, what options does an ISO need to be created with? Can
> >> you repackage an ISO with those options?
> >
> > If it still exists, packaging.hg creates the XenServer ISO with the correct
> > options for PXE boot. XCP probably uses the same build scripts...are they
> > open-source?
> 
> Those scripts don't contain any license information that I can see, and 
> we haven't published them publicly. I'm all for making XCP easier to 
> build outside of Citrix, but I don't think that thrusting our build 
> system on the world is the right way to do it ;)
> 
> Anyway, here is the blurb that generates the iso:
> 
> mkisofs -joliet -joliet-long -r \
>     -b boot/isolinux/isolinux.bin -c boot/isolinux/boot.cat \
>     -no-emul-boot -boot-load-size 4 -boot-info-table \
>     -sort $(MY_OBJ_DIR)/sort.main.list \
>     -V "$(PLATFORM_NAME)-$(PLATFORM_VERSION) $(LABEL_main)" \
>     -o $@ $(STAGING_main);
> 
> Does that look like it'll generate a thumb-drive-bootable ISO?

The scripts which create the Debian CD sets use
        case "$MKISOFS" in
            *xorriso*)
                add_mkisofs_opt $CDDIR/../$N.mkisofs_opts "-isohybrid-mbr 
syslinux/usr/lib/syslinux/isohdpfx.bin"
                add_mkisofs_opt $CDDIR/../$N.mkisofs_opts "-partition_offset 16"
which I think is related to this.

I think it is basically doing isohybrid at creation time instead of post
processing. It seems (and this corresponds with my vague memory of
seeing the discussion on debian-cd) like it needs xorriso rather than
mkisofs (which IIRC is deprecated).

Ian.


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