# version=RHEL8
# Install OS instead of upgrade
install
cdrom
auth --enableshadow --passalgo=sha512 --kickstart
# License agreement
eula --agreed
# Use text mode install
text
# Disable Initial Setup on first boot
firstboot --disable
# Keyboard layout
keyboard --vckeymap=us --xlayouts='us'
# System language
lang en_US.UTF-8
# Network information
network --bootproto=dhcp --device=link --activate
network --hostname=rhel8
firewall --disabled
# Root password
rootpw builder --plaintext
# SELinux configuration
selinux --permissive
# Do not configure the X Window System
skipx
# System timezone
timezone UTC
# Add a user named builder
user --groups=wheel --name=builder --password=builder --plaintext --gecos="builder"

# System bootloader configuration
bootloader --location=mbr --boot-drive=sda
# Clear the Master Boot Record
zerombr
clearpart --all --initlabel --drives=sda
part / --fstype="ext4" --grow --asprimary --label=slash --ondisk=sda

# Reboot after successful installation
reboot

%packages --ignoremissing --excludedocs
# dnf group info minimal-environment
@^minimal-environment
@core
openssh-server
sed
sudo
python3
open-vm-tools

# Exclude unnecessary firmwares
-iwl*firmware
%end

# Enable/disable the following services
services --enabled=sshd

%post --nochroot --logfile=/mnt/sysimage/root/ks-post.log
# Disable quiet boot and splash screen
sed --follow-symlinks -i "s/ rhgb quiet//" /mnt/sysimage/etc/default/grub
sed --follow-symlinks -i "s/ rhgb quiet//" /mnt/sysimage/boot/grub2/grubenv

# Passwordless sudo for the user 'builder'
echo "builder ALL=(ALL) NOPASSWD: ALL" >> /mnt/sysimage/etc/sudoers.d/builder
# Remove the package cache
yum -y clean all

# Disable swap
swapoff -a
rm -f /swapfile
sed -ri '/\sswap\s/s/^#?/#/' /etc/fstab

sed -i '/^\(HWADDR\|UUID\)=/d' /etc/sysconfig/network-scripts/ifcfg-*   

%end