1.安装软件包
yum install genisoimage pykickstart -y

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2.新建数据目录，复制安装包
mount /dev/cdrom /media/cdrom
mkdir -p /data/os
rsync -a /media/cdrom/ /data/os/

cd /data/os/
cp /root/ks.cfg ./isolinux/ks.cfg

3.编写ks文件
[root@test os]# more /data/os/isolinux/ks.cfg
#version=RHEL8
# Partition clearing information
clearpart --none --initlabel
# Use graphical install
graphical
#repo --name="AppStream" --baseurl=file:///run/install/repo/AppStream
# Use CDROM installation media
cdrom
# Keyboard layouts
keyboard --vckeymap=us --xlayouts='us'
# System language
lang en_US.UTF-8

# Network information
network  --hostname=localhost.localdomain
# Root password  --tom.12
rootpw --iscrypted $6$xCCTrJnCr7QBGZb/$hXm51x5uAKlQoYI/Dckyx6j03UCGtSFCsGtGVnQ5VQmlfOkAjPQCFqmJfvNXoZqqfYRbdaKyxDhqUwynPA60N0
# SELinux configuration
selinux --disabled
# Do not configure the X Window System
skipx
# Run the Setup Agent on first boot
firstboot --disable
# firewall configuration
firewall --disabled
# System services
services --enabled="chronyd"
# System timezone
timezone Asia/Shanghai

%packages
@Base
@Core
@development
@network-tools
kexec-tools
vim
bind-utils
sysstat
lrzsz
iptraf
cmake
redhat-lsb
lsof
ftp
traceroute
ncurses-devel
dstat
iotop
NetworkManager-tui
openssl-devel

%end

%addon com_redhat_kdump --enable --reserve-mb='auto'

%end

# Reboot after installation
reboot

4.验证ks文件
[root@test ~]# ksvalidator /root/ks.cfg

5.编辑引导配置文件
[root@test ~]# cat /data/os/isolinux/isolinux.cfg

label linux
   menu label ^Install CentOS Linux 8.0.1905
   kernel vmlinuz
   append initrd=initrd.img inst.stage2=hd:LABEL=CentOS-8-BaseOS-x86_64 quiet

label custom
   menu label ^Install CentOS 8 autoinstall
   kernel vmlinuz
   append initrd=initrd.img inst.stage2=hd:LABEL=CENTOS8 inst.ks=cdrom:/isolinux/ks.cfg

[root@test ~]# cat /data/os/EFI/BOOT/grub.cfg

menuentry 'Test this media & install CentOS Linux 8.0.1905' --class fedora --class gnu-linux --class gnu --class os {
         linuxefi /images/pxeboot/vmlinuz inst.stage2=hd:LABEL=CentOS-8-BaseOS-x86_64 rd.live.check quiet
         initrdefi /images/pxeboot/initrd.img
}
menuentry 'Install CentOS 8 custom autoinstall' --class fedora --class gnu-linux --class gnu --class os {
     linuxefi /images/pxeboot/vmlinuz inst.ks=cdrom:/isolinux/ks.cfg inst.stage2=hd:LABEL=CENTOS8 quiet
     initrdefi /images/pxeboot/initrd.img
     }

6.制作iso

cd /data/os/

genisoimage -v -cache-inodes -joliet-long -R -J -T -V CENTOS8 -o /root/centos-8.0-x86_64.iso -input-charset utf-8 -c isolinux/boot.cat    -b isolinux/isolinux.bin -no-emul-boot -boot-load-size 4 -boot-info-table -eltorito-alt-boot    -b images/efiboot.img    -no-emul-boot  .