Createrepo

Prep repo host

yum install createrepo nginx
/usr/share/nginx/html/rhel/7Server/os/
createrepo /usr/share/nginx/html/rhel/7Server/os/
/etc/yum.repos.d/my.repo

[mytestrepoos]
name=MyRepo $releasever - OS
# $releasever=7Server
baseurl=http://repo.example.com:80/rhel/$releasever/os/
enabled=1
gpgcheck=1
# curl -O http://repo.example.com:80/rhel/7Server/os/RPM-GPG-KEY-redhat-release && rpm --import RPM-GPG-KEY-redhat-release

mount -o loop rhel-server-7.9-x86_64-dvd.iso,ro /mnt/rhel

cp -r /mnt/rhel /usr/share/nginx/html/rhel/7/os
 mount -o loop rhel-8.3-x86_64-dvd.iso /mnt/rhel
cp -r /mnt/rhel /usr/share/nginx/html/rhel/8/os
# cp -r rhel-7.9 /usr/share/nginx/html/rhel/7/os

createrepo  /usr/share/nginx/html/rhel/8/os/
/usr/share/nginx/html/rhel/8Server -> /usr/share/nginx/html/rhel/8

createrepo  /usr/share/nginx/html/rhel/7/os/
/usr/share/nginx/html/rhel/7Server -> /usr/share/nginx/html/rhel/7

/usr/share/nginx/html/isos/