CERN CentOS 7
A bit of history
CERN CentOS 7 was released in 2014 and will be supported until July 2024.
CERN Community ENTerprise Operating System 7 is the upstream CentOS 7, built to integrate into the CERN computing environment but it is not a site-specific product: all CERN site customisations are optional and can be deactivated for external users.
In 2015, CERN began migrating away from the Scientific Linux collaboration to provide the next version (RHEL 7 rebuild).
Default repositories
Each Red Hat based distribution is shipped with a few default repositories.
At CERN you can list them with:
$ ls -l /etc/yum.repos.d/*.repo
-rw-r--r--. 1 root root 1964 Nov 27 2018 /etc/yum.repos.d/CentOS-Base.repo
-rw-r--r--. 1 root root 2395 Nov 27 2018 /etc/yum.repos.d/CentOS-CERN.repo
-rw-r--r--. 1 root root 1008 Nov 27 2018 /etc/yum.repos.d/CentOS-CR.repo
-rw-r--r--. 1 root root 331 Nov 27 2018 /etc/yum.repos.d/CentOS-Debuginfo.repo
-rw-r--r--. 1 root root 210 Nov 27 2018 /etc/yum.repos.d/CentOS-fasttrack.repo
-rw-r--r--. 1 root root 2105 Nov 27 2018 /etc/yum.repos.d/CentOS-Sources.repo
-rw-r--r--. 1 root root 7983 Nov 27 2018 /etc/yum.repos.d/CentOS-Vault.repo
-rw-r--r--. 1 root root 1008 Dec 7 2015 /etc/yum.repos.d/elrepo.repo
-rw-r--r--. 1 root root 587 Sep 3 2014 /etc/yum.repos.d/epel.repo
-rw-r--r--. 1 root root 665 Sep 3 2014 /etc/yum.repos.d/epel-testing.repo
These repositories are installed by -release rpm packages.
$ rpm -qf /etc/yum.repos.d/epel.repo
epel-release-7-2.1.el7.cern.noarch
Additional -release rpm packages can be searched with yum search release.
Please note that on a puppet managed node the repositories are managed by the osrepos module, and repo files stored in an alternative directory /etc/yum-puppet.repos.d/.
Details about the CERN specific repositories:
The cernonly repository
This is a special repository only available inside cern, it contains proprietary software and tools very cern specific that we cannot redistribute.
The cern repository
This repository contains all additional software that Linux Support adds to the main distribution. These packages are maintained at CERN.
Special Interest Groups (SIGs)
A new concept is available in the CentOS community : the Special Interest Groups (SIGs).
From the wiki you can get a detailed description:
Special Interest Groups (SIG) are smaller groups within the CentOS community that focus on a small set of issues, in order to either create awareness or to focus on development along a specific topic. Each SIG can seek a dedicated section on the wiki, along with an option to display the names of the people involved in that SIG. A mailing list on the CentOS list server can also be setup as well. As proper, and subject to available resources, other resources they might need (eg. a SCM system, web hosting space, admin services, etc.) may be offered.
For end users it results in additional packages available :
$ yum search centos-release
[...]
centos-release.x86_64 : CentOS Linux release file
centos-release-ansible26.noarch : Ansible 2.6 packages from the CentOS ConfigManagement SIG repository
centos-release-azure.noarch : Yum configuration for CentOS Virt SIG Azure repo
centos-release-ceph-hammer.noarch : Ceph Hammer packages from the CentOS Storage SIG repository
centos-release-ceph-jewel.noarch : Ceph Jewel packages from the CentOS Storage SIG repository
centos-release-ceph-luminous.noarch : Ceph Luminous packages from the CentOS Storage SIG repository
centos-release-ceph-nautilus.noarch : Ceph Nautilus packages from the CentOS Storage SIG repository
centos-release-configmanagement.noarch : Release file for ConfigManagement SIG repository
centos-release-dotnet.noarch : Config to enable the repository for DotNet on CentOS
centos-release-fdio.noarch : fd.io packages from the CentOS NFV SIG repository
centos-release-gluster-legacy.noarch : Disable unmaintained Gluster repositories from the CentOS Storage SIG
centos-release-gluster310.noarch : Gluster 3.10 (Long Term Stable) packages from the CentOS Storage SIG repository
centos-release-gluster312.noarch : Gluster 3.12 (Long Term Stable) packages from the CentOS Storage SIG repository
centos-release-gluster313.noarch : Gluster 3.13 (Short Term Stable) packages from the CentOS Storage SIG repository
centos-release-gluster36.noarch : GlusterFS 3.6 packages from the CentOS Storage SIG repository
centos-release-gluster37.noarch : GlusterFS 3.7 packages from the CentOS Storage SIG repository
centos-release-gluster38.noarch : GlusterFS 3.8 packages from the CentOS Storage SIG repository
centos-release-gluster39.noarch : Gluster 3.9 (Short Term Stable) packages from the CentOS Storage SIG repository
centos-release-gluster40.x86_64 : Gluster 4.0 (Short Term Stable) packages from the CentOS Storage SIG repository
centos-release-gluster41.x86_64 : Gluster 4.1 (Long Term Stable) packages from the CentOS Storage SIG repository
centos-release-gluster41.noarch : Gluster 4.1 (Long Term Stable) packages from the CentOS Storage SIG repository
centos-release-gluster5.noarch : Gluster 5 packages from the CentOS Storage SIG repository
centos-release-gluster6.noarch : Gluster 6 packages from the CentOS Storage SIG repository
centos-release-nfs-ganesha28.noarch : NFS-Ganesha 2.8 packages from the CentOS Storage SIG repository
centos-release-nfv-common.noarch : Common release file to establish shared metadata for CentOS NFV SIG
centos-release-openshift-origin.noarch : Common release file to establish shared metadata for CentOS PaaS SIG
centos-release-openshift-origin13.noarch : Yum configuration for OpenShift Origin 1.3 packages
centos-release-openshift-origin14.noarch : Yum configuration for OpenShift Origin 1.4 packages
centos-release-openshift-origin15.noarch : Yum configuration for OpenShift Origin 1.5 packages
centos-release-openshift-origin310.noarch : Yum configuration for OpenShift Origin 3.10 packages
centos-release-openshift-origin311.noarch : Yum configuration for OpenShift Origin 3.11 packages
centos-release-openshift-origin36.noarch : Yum configuration for OpenShift Origin 3.6 packages
centos-release-openshift-origin37.noarch : Yum configuration for OpenShift Origin 3.7 packages
centos-release-openshift-origin39.noarch : Yum configuration for OpenShift Origin 3.9 packages
centos-release-openstack.noarch : OpenStack from the CentOS Cloud SIG repo configs
centos-release-openstack-kilo.noarch : OpenStack from the CentOS Cloud SIG repo configs
centos-release-openstack-liberty.noarch : OpenStack from the CentOS Cloud SIG repo configs
centos-release-openstack-mitaka.noarch : OpenStack from the CentOS Cloud SIG repo configs
centos-release-openstack-newton.noarch : OpenStack from the CentOS Cloud SIG repo configs
centos-release-openstack-ocata.noarch : OpenStack from the CentOS Cloud SIG repo configs
centos-release-openstack-pike.x86_64 : OpenStack from the CentOS Cloud SIG repo configs
centos-release-openstack-pike.noarch : OpenStack from the CentOS Cloud SIG repo configs
centos-release-openstack-queens.x86_64 : OpenStack from the CentOS Cloud SIG repo configs
centos-release-openstack-queens.noarch : OpenStack from the CentOS Cloud SIG repo configs
centos-release-openstack-rocky.noarch : OpenStack from the CentOS Cloud SIG repo configs
centos-release-openstack-stein.noarch : OpenStack from the CentOS Cloud SIG repo configs
centos-release-opstools.noarch : Config to enable the repository for OpsTools SIG
centos-release-ovirt35.noarch : oVirt 3.5 packages from the CentOS Virtualization SIG repository
centos-release-ovirt36.noarch : oVirt 3.6 packages from the CentOS Virtualization SIG repository
centos-release-ovirt40.noarch : oVirt 4.0 packages from the CentOS Virtualization SIG repository
centos-release-ovirt41.noarch : oVirt 4.1 packages from the CentOS Virtualization SIG repository
centos-release-ovirt42.noarch : oVirt 4.2 packages from the CentOS Virtualization SIG repository
centos-release-ovirt43.noarch : oVirt 4.3 packages from the CentOS Virtualization SIG repository
centos-release-paas-common.noarch : Common release file to establish shared metadata for CentOS PaaS SIG
centos-release-qemu-ev.noarch : QEMU Enterprise Virtualization packages from the CentOS Virtualization SIG repository
centos-release-scl.noarch : Software collections from the CentOS SCLo SIG
centos-release-scl-rh.noarch : Software collections from the CentOS SCLo SIG (upstream scl only)
centos-release-storage-common.noarch : Common release file to establish shared metadata for CentOS Storage SIG
centos-release-virt-common.noarch : Common release file to establish shared metadata for CentOS Virt SIG
centos-release-xen.x86_64 : CentOS Virt SIG Xen repo configs
centos-release-xen-410.x86_64 : CentOS Virt Sig Xen repo configs for Xen 4.10
centos-release-xen-412.x86_64 : CentOS Virt Sig Xen repo configs for Xen 4.12
centos-release-xen-46.x86_64 : CentOS Virt Sig Xen repo configs for Xen 4.6
centos-release-xen-48.x86_64 : CentOS Virt Sig Xen repo configs for Xen 4.8
centos-release-xen-common.x86_64 : CentOS Virt Sig Xen support files
centos-release-yum4.noarch : YUM4 packages from the CentOS ConfigManagement SIG repository
Please note that all these additional packages are provided as-is and support requests should not be addressed to the linux support team.
Most of these repositories are available with the osrepos module in the puppet world.