CentOS - Aug 2017 - Custom kickstart post section on usb thumbdrive

Hi All,

I am attempting to create a custom USB drive for kickstart install.

I found this:
            1. get the ISO file of CentOS 7

                2. mount -o loop CentOS-7.0*.iso /mnt/

                3. mkdir -p
/CentOS-7-ISO-respin/{CentOS-7-unpacked,CentOS-7-iso}

                4. rsync -avz /mnt/ /CentOS-7-ISO-respin/RHEL-7-unpacked

                5. put your kickstart file into
/CentOS-7-ISO-respin/RHEL-7-unpacked

                6. add a new line to
/CentOS-7-ISO-respin/RHEL-7-unpacked/isolinux/isolinux.cfg (this way you
can use the ISO also from a DVD)
                label linux_ks
                  menu label ^Install CentOS 7 with Kickstart
                  kernel vmlinuz
                  append initrd=initrd.img inst.stage2=hd:sdb2:/
ks=hd:sdb1:/ks.cfg

                7. create the ISO with:
                /usr/bin/genisoimage -untranslated-filenames -volid
'CentOS-7.0-KS-x86_64' -J -joliet-long -rational-rock -translation-table
-input-charset utf-8 -x ./lost+found -b isolinux/isolinux.bin -c isolinux/
boot.cat -no-emul-boot -boot-load-size 4 -boot-info-table

                8. dd
if=/CentOS-7-ISO-respin/CentOS-7-CSB-iso/CentOS-7.0-KS-x86_64-DVD.iso
of=/dev/XXX (where XXX is the Device Name of your USB drive without the
partition number e.g. /dev/sdb) (Careful, that command destroys all data on
the Stick)


But I would also like to create a custom directory on the ISO and put some
files in there for
a custom POST section.

I was not able to find an example with a custom POST section on the ISO.
Anyone have any examples?

Thanks,

Jerry

On Mon, 14 Aug 2017, Jerry Geis wrote:
> Hi All,
>
> I am attempting to create a custom USB drive for kickstart install.
> [... much snippage ...]
> But I would also like to create a custom directory on the ISO and 
> put some files in there for a custom POST section.
>
> I was not able to find an example with a custom POST section on the 
> ISO. Anyone have any examples?
The trouble I think you'll encounter is that the %post section of the 
kickstart operation is chroot-ed into the new system. You won't be 
able to see the original ISO, as far as I know.

The %pre section is *not* run in the chroot environment, but it's run 
prior to partitioning the system disk, so I don't know how you'd copy 
files unless you did all your partitioning in %pre, reserving one 
partition for your %post data.

I think what I'd do is create and install a custom rpm with the data 
files you want available during %post. Of course, that means you'll 
have to hack the repo on your USB drive, so it's not really a 
lightweight solution.

-- 
Paul Heinlein <> heinlein at madboa.com <> https://www.madboa.com/