Mirroring Centos Locally

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When creating one off clusters, it is always handy to control package repositories. Getting the correct mix of kernel, Mellanox OFED, and CUDA driver versions is easier when you reference a static set of packages. I generally put a cluster’s package repositories on one of the NFS shares that get mounted globally.

The quick and easy way to make a mirror locally…

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yum install -y createrepo yum-utils
mkdir -p /home/repo/centos/{base,extras,updates,centosplus} /home/repo/epel
reposync -g -l -d -m --repoid=base --newest-only --download-metadata --download_path=/home/repo/centos
reposync -g -l -d -m --repoid=extras --newest-only --download-metadata --download_path=/home/repo/centos/
reposync -g -l -d -m --repoid=updates --newest-only --download-metadata --download_path=/home/repo/centos/
reposync -g -l -d -m --repoid=centosplus --newest-only --download-metadata --download_path=/home/repo/centos/
reposync -g -l -d -m --repoid=epel --newest-only --download-metadata --download_path=/home/repo/epel/
createrepo /home/repo/centos
createrepo /home/repo/epel

Setting up yum:

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mv /etc/yum.repos.d/* /tmp/
cat <<EOF >/etc/yum.repos.d/local.repo
[centos]
name=Centos 7
baseurl=file:///home/repo/centos
enabled=1                                                
gpgcheck=0
                            
[epel]
name=EPEL 7              
baseurl=file:///home/repo/epel
enabled=1
gpgcheck=0
EOF