Quick dirty script to maintain local repo mirrors. Serve up with httpd, nginx, or whatever

local-mirrors.repo

# Add this file to /etc/yum.repos.d/local-mirrors.repo
# Change the IP below accordingly

[mirror-base]
name=Base mirror
baseurl=http://192.168.100.10/base
enabled=1
cost=500
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

[mirror-extras]
name=Extras mirror
baseurl=http://192.168.100.10/extras
enabled=1
cost=500
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

[mirror-updates]
name=Updates mirror
baseurl=http://192.168.100.10/updates
enabled=1
cost=500
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-CentOS-7

[mirror-epel]
name=EPEL mirror
baseurl=http://192.168.100.10/epel
enabled=1
cost=500
gpgcheck=1
# I had to manually copy this file to `/var/www/html/epel/RPM-GPG-KEY-EPEL-7`
gpgkey=http://192.168.100.10/epel/RPM-GPG-KEY-EPEL-7

sync-repos.sh

#!/bin/bash
# Place this in /etc/cron.daily/sync-repos and chmod 0755

set -euo pipefail

# These repos must be added to your local system by name. Add more if you need them to this list.
repolist=(base updates extras epel)

for repo in "${repolist[@]}"; do
    echo "Syncing repo: ${repo}"
    reposync --download-metadata --delete --gpgcheck -l --download_path=/var/www/html --downloadcomps --download-metadata --newest-only --repoid "${repo}"

    echo "Finished syncing '${repo}'. Generating metadata"

    cd "/var/www/html/${repo}"
    COMPS=""
    if [ -f comps.xml ]; then
        COMPS="--groupfile=./comps.xml"
    fi

    createrepo --verbose ${COMPS} "$(pwd)"

    echo
    echo "Syncing repo ${repo} complete."
done

# Ensure selinux context is valid for serving from http
restorecon -rv /var/www/html/

exit 0