CentOS 7 - Custom Kickstart Build

isolinux.cfg

# ...

# This is by default and unedited
label linux
  menu label ^Install CentOS Linux 7
  kernel vmlinuz
  append initrd=initrd.img inst.stage2=hd:LABEL=CentOS\x207\x20x86_64 quiet

# This is by default and unedited
label check
  menu label Test this ^media & install CentOS Linux 7
  kernel vmlinuz
  append initrd=initrd.img inst.stage2=hd:LABEL=CentOS\x207\x20x86_64 rd.live.check quiet

# This is a custom addition providing "nameserver", and "inst.ks" variables.
label custom
  menu label ^Kickstart via spacewalk.my-company.internal (CentOS-7)
  kernel vmlinuz
  append initrd=initrd.img inst.stage2=hd:LABEL=CentOS\x207\x20x86_64 rd.live.check quiet nameserver=192.168.0.8 nameserver=192.168.0.4 inst.ks=http://spacewalk.my-company.internal/ks/cfg/org/1/label/CentOS-7

# This is a standard "boot from first hard drive" here for documentation/retention/ease-of-use purposes
label harddrive
  menu label ^Boot from Hard Drive
  menu default
  localboot 0x80
  append SLX=0x80

# ...

Makefile

build:
	genisoimage \
		-U -r -v -T -J -joliet-long \
		-V 'CentOS 7 x86_64' \
		-volset 'CentOS 7 x86_64' \
		-A 'CentOS 7 x86_64' \
		-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 \
		-o CentOS-7-x86_64-custom-1611.iso \
		CentOS-7-x86_64-custom-1611/
	implantisomd5 --supported-iso CentOS-7-x86_64-custom-1611.iso