sudo iptables -t nat -A POSTROUTING -j MASQUERADE
or
firewall-cmd --zone=external --add-masquerade --permanent
firewall-cmd --reload

This helps avoid errors like: dracut-initqueue[688]: Warning: unknown network kickstart URL: ...

mkdir kick && mkdir kick

vim centos7.cfg

#version=RHEL7
install

auth --enableshadow --passalgo=sha512
repo --name="EPEL" --baseurl=http://dl.fedoraproject.org/pub/epel/7/x86_64
eula --agreed
reboot
url --url="http://mirror.litnet.lt/centos/7/os/x86_64/"
firstboot --enable
ignoredisk --only-use=vda
keyboard --vckeymap=en --xlayouts='en'
lang en_US.UTF-8

network --bootproto=dhcp --device=enp0s3 --noipv6 --activate
network --hostname=centos7.test.local
rootpw mypassword
services --enabled=NetworkManager,sshd,chronyd
timezone Europe/Vilnius --isUtc --ntpservers=0.centos.pool.ntp.org,1.centos.pool.ntp.org,2.centos.pool.ntp.org,3.centos.pool.ntp.org
user --groups=wheel --homedir=/home/monit --name=monit --password=password --iscrypted --gecos="monit"
bootloader --location=mbr --boot-drive=vda
autopart --type=lvm
zerombr
clearpart --all --drives=vda
selinux --permissive

%packages
@base
@core
chrony
yum-cron
%end

python -m SimpleHTTPServer 1111
Serving HTTP on 0.0.0.0 port 1111 ...
or
python3 -m http.server 1111
Serving HTTP on 0.0.0.0 port 1111 (http://0.0.0.0:1111/) ...

sudo virt-install --connect=qemu:///system --network=bridge:virbr0 --extra-args="ks=http://192.168.0.101:1111/centos7.cfg console=tty0 console=ttyS0,115200" --name=centos7 --disk /var/lib/libvirt/images/centos7.qcow2,size=15,device=disk,bus=virtio,format=qcow2 --ram 1500 --vcpus=1 --check-cpu --accelerate --hvm --location=http://mirror.litnet.lt/centos/7/os/x86_64/ --nographics

CentOS Linux 7 (Core)
Kernel 3.10.0-862.el7.x86_64 on an x86_64

centos7 login: