Kickstart file for a minimal CentOS 7

ks.cfg

# version=RHEL7
#
# To be used with CentOS 7 Minimal ISO
# Syntax: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/installation_guide/sect-kickstart-syntax
#

# Use remote url installation media with text installer
install
url --url="http://mirror.centos.org/centos/7/os/x86_64/"
text

# Poweroff after install
poweroff

# Install on primary disk
ignoredisk --only-use=sda

# Suppress Unsupported Hardware Detected alerts
unsupported_hardware

# System language
lang en_US

# Keyboard layout
keyboard --vckeymap=us

# System authorization information
auth --enableshadow --passalgo=sha512

# Root account lock
rootpw --lock

# Initial admin user
# See https://serverfault.com/a/330072 for how to create hashed password
user --name=admin --groups=wheel --password=$6$Ag7lntJkDsuCKzHE$yvYJWK04uJc5ZJq5zGFKMJqIOybBvt4PXUFPrWTzU58qmfvuh8qRPE9J90uj2KRmLATvpq/OENKNtUilh218I1 --iscrypted

# Network information
network --device=link --bootproto=dhcp --onboot=yes --noipv6 --activate

# System timezone
timezone America/Chicago --utc --nontp

# Configure bootloader
bootloader --location=mbr

# Partition clearing information
clearpart --all --initlabel --drives=sda
zerombr

# Disk partitioning information
part /boot --fstype=xfs --ondisk=sda --size=512 --label=boot
part pv.01 --ondisk=sda --grow
volgroup vg_sys pv.01
logvol swap  --fstype=swap --size=512 --name=lv_swap --vgname=vg_sys
logvol /  --fstype=xfs --percent=50 --label=lv_root --name=lv_root --vgname=vg_sys
logvol /home  --fstype=xfs --percent=10 --label=lv_home --name=lv_home --vgname=vg_sys
logvol /tmp  --fstype=xfs --percent=20 --label=lv_tmp --name=lv_tmp --vgname=vg_sys
logvol /var  --fstype=xfs --percent=20 --label=lv_var --name=lv_var --vgname=vg_sys

# Install minimal required packages
%packages --nobase --nocore --excludedocs
@core --nodefaults
qemu-guest-agent
%end

# Make admin sudo, update packages, and install newest long-term kernel
%post
echo "admin  ALL=(ALL)  NOPASSWD:ALL" >> /etc/sudoers
yum update -y
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org
rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
yum --enablerepo=elrepo-kernel install -y kernel-lt
sed -i 's/GRUB_DEFAULT=.*/GRUB_DEFAULT=0/g' /etc/default/grub
grub2-mkconfig -o /boot/grub2/grub.cfg
%end