Create a local EPEL mirror <http://blog.iandexter.net/2012/12/create-local-epel-mirror.html>

1-install-dependencies.sh

yum install httpd yum-utils createrepo

2-patch-reposync.sh

cat > reposync.patch
--- /usr/bin/reposync.bak       2012-11-13 13:30:37.000000000 +0800
+++ /usr/bin/reposync   2012-11-13 13:34:47.000000000 +0800
@@ -117,6 +117,8 @@ def parseArgs():
         help="enable yum plugin support")
     parser.add_option("-m", "--downloadcomps", default=False, action="store_true",
         help="also download comps.xml")
+    parser.add_option("-f", "--flatdir", dest='flatdir', default=False, action="store_true",
+        help="flatten directory; do not add repoid")

     (opts, args) = parser.parse_args()
     return (opts, args)
@@ -186,7 +188,11 @@ def main():
         else:
             download_list = list(reposack)

-        local_repo_path = opts.destdir + '/' + repo.id
+        if opts.flatdir:
+            local_repo_path = opts.destdir;
+        else:
+            local_repo_path = opts.destdir + '/' + repo.id
+
         if opts.delete and os.path.exists(local_repo_path):
             current_pkgs = localpkgs(local_repo_path)

cp /usr/bin/reposync{,.bak}
patch < reposync.patch

3-create-repo-directories.sh

mkdir -p /srv/repos/epel{,.staging}/5/{x86_64,i386,noarch}

4-download-repo.sh

reposync -a x86_64 -r epel -p /srv/repos/epel.staging -l -m -f

5-copy-packages.sh

cd /srv/repos/epel.staging/
for a in {x86_64,i386,noarch} ; do \
   find . -maxdepth 1 -iname "*$a*" -exec cp -v {} 5/$a/ \; ; \
   cp -f comps.xml 5/$a/ ;
done

6-create-repo-metadata.sh

for a in {x86_64,i386,noarch} ; do \
   createrepo -v -g comps.xml 5/$a/ ; \
done

epel.repo

[epel]
name=Extra Packages for Enterprise Linux 5 - $basearch
baseurl=http://fqdn.of.repo.server/epel/5/$basearch
### mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=epel-5&arch=$basearch
failovermethod=priority
enabled=1
gpgcheck=0

local-repo.conf

<VirtualHost _default_:80>
   ServerAdmin admin@email.org
   ServerName fqdn.of.repo.server
   DocumentRoot /srv/repos

   KeepAlive On
   KeepAliveTimeout 2
   MaxKeepAliveRequests 100

   AddType application/octet-stream .iso
   AddType application/octet-stream .rpm

   <Directory "/srv/repos">
      Options +Indexes +FollowSymLinks
      AllowOverride None
      Order allow,deny
      Allow from all
   </Directory>

   <LocationMatch "\.(xml|xml\.gz|xml\.asc|sqlite)$">
      Header set Cache-Control "must-revalidate"
      ExpiresActive On
      ExpiresDefault "now"
   </LocationMatch>

   LogFormat "%h %l %u %t \"%r\" %>s %b \"%{Referer}i\" %I %O \"%{User-Agent}i\"" combined
</VirtualHost>