I think isohybrid is key. I use a modified script originally written by
Connie Sieh (thank you!). I can certainly pass it along if you are
interested.
Instead of copying the files out of the ISO, I just mount it on loopback
and graft what I need in with mkisofs: (some snippets)
(mount netinstall ISO to $TMPDIR_ISO)
cd $TMPDIR_ISO/
#Determine toplevel directories from mounted original CD
# We ignore isolinux, EFI, and Packages
TOP_CD_DIRS=`find . -maxdepth 1 -type d -print | sed -e "s/.//" | sed -e
"s,/,," | sed -e "s/isolinux//" | sed -e "s/EFI//" | sed -e
"s/Packages//" | sed -e "s/repodata//"`
for DIR in $TOP_CD_DIRS
do
GRAFT_DIRS="${GRAFT_DIRS} ${DIR}=$TMPDIR_ISO/${DIR}"
done
cd $TMPDIR_NEWBASE/
/usr/bin/mkisofs -v -U -J -R -T -m repoview -m boot.iso -b
isolinux/isolinux.bin -c isolinux/boot.cat -no-emul-boot -boot-load-size
4 -boot-info-table -eltorito-alt-boot -e images/efiboot.img
-no-emul-boot -graft-points \
-V $VOL_ID \
-o $WORKDIR/$CONTEXT_NAME/$CONTEXT_OUT_ISO \
$TMPDIR_NEWBASE \
$GRAFT_DIRS \
contexts=$WORKDIR/$CONTEXT_NAME/contexts \
repodata=${NEC_BUILD_REPO}/repodata \
Packages=${NEC_BUILD_REPO}/Packages \
elrepo=${NEC_BUILD_REPO}/elrepo \
epel=${NEC_BUILD_REPO}/epel
(some cleanup/unmounting here)
/usr/bin/isohybrid -u $WORKDIR/$CONTEXT_NAME/$CONTEXT_OUT_ISO
/usr/bin/implantisomd5 $WORKDIR/$CONTEXT_NAME/$CONTEXT_OUT_ISO
On 05/24/2018 01:52 PM, Kraus, Dave (GE Healthcare) wrote:
Pungi uses isohybrid (from the syslinux package) down in the bowels to do that.
At least that's what I found when I deconstructed its methodology.
That's how I'm getting a USB-bootable .iso file for our spin, anyway...
The algorithm I'm using is:
mkisofs
isohybrid
implantisomd5
Your mileage may vary...
On 5/24/18, 1:35 PM, "owner-scientific-linux-us...@listserv.fnal.gov on behalf of Pat
Riehecky" <owner-scientific-linux-us...@listserv.fnal.gov on behalf of
riehe...@fnal.gov> wrote:
Hello,
Are you creating the custom iso with pungi or a different tool?
Pat
On 05/24/2018 01:17 PM, Bill wrote:
> I am creating a custom installation ISO using kickstart. This install
ISO is based on SL 7.2.
>
> When I burn a DVD from this ISO I can boot from the DVD and the install
menu come up as expected.
>
> When I use dd to copy the ISO to a USB key and try to boot from the USB
key the install menu does not appear and the system boots from the hard drive.
>
> I tried using dd to copy the SL7.2 ISO to a USB key. When I try to boot
from this USB key the install menu comes up as expected.
>
> What files on the SL7.2 have to do with booting from the USB key?
>
> Is there a mkisofs option I should be using to make booting USB key work?
--
Pat Riehecky
Fermi National Accelerator Laboratory
www.fnal.gov
www.scientificlinux.org
