# reposync包含在yum-utils中
yum install

mkdir -p /var/www/html/iso
mkdir /tmp/iso
mount -o loop /root/CentOS-7-x86_64-xxx.iso /tmp/iso
cp

mkdir -p /var/www/html/epel
wget -np -H --cut-dirs=0 -r -c -L http://dl.fedoraproject.org/pub/epel/7/x86_64 -P /var/www/html/epel

reposync -r epel -p /var/www/html/
createrepo -v /var/www/html/epel

cd /etc/yum.repos.d/
mkdir bak
mv

vim /etc/yum.repos.d/epel.repo
加入
[epel]
name=epel
baseurl=http://server_ip/iso
enabled=1
gpgcheck=0

vim /etc/yum.repos.d/epel.repo
加入
[epel]
name=epel
baseurl=file:///var/www/html/epel
enabled=1
gpgcheck=0

yum clean all
yum makecache
yum repolist

# 可以将epel本地仓库制作成iso镜像文件
mkisofs

vim /etc/yum.conf
修改
keepcache=1

cd

cp * /var/www/html/iso/centos/7/x86_64/Packages/
cp

createrepo -p -d -o /var/www/html/iso /var/www/html/iso
createrepo -p -d -o /var/www/html/epel /var/www/html/epel
或者
createrepo --update /var/www/html/iso
createrepo --update /var/www/html/epel