CentOS Stream 9¶
CentOS Stream 9 is due to be deprecated within the CERN environment on 30.06.2023, see OTG0074647
Release status¶
- CentOS Stream 9 was made available upstream on the 03.12.2021
- CentOS Stream 9 was made available at CERN on 09.02.2022
- CentOS Stream 9 support at CERN is slated for decommission on 30.06.2023. We recommend all new installs to use either AlmaLinux or Red Hat Enterprise Linux. Please refer to Which distribution should I use if you are not sure
How does CERN use CentOS Stream 9?¶
System updates¶
CentOS Stream 9 updates are staged
- A 'production' repository is provided, which most systems will use and is updated once per week (except for critical security vulnerability patches)
- A 'testing' repository is also provided which is updated daily
- Snapshots of CentOS repositories are performed daily and can be found at this URL
- The 'cern-dnf-tool' is a new package that can be used to easily switch between 'production', 'testing' or 'snapshot' repositories
- The 'dnf-autoupdate' package is provided for automatic (distro-sync) updates (the same as CC7).
Modified packages¶
- centos-stream-release:
- DNF repositories files changed to use http://linuxsoft.cern.ch/cern/centos/s9/
- centos-gpg-keys:
- Added CERN Koji RPM signing keys
- epel-release:
- Yum repositories files changed to use http://linuxsoft.cern.ch/
Note: Unless otherwise stated above, CentOS Stream 9 packages (rpms) are the very same packages released by the upstream CentOS team.
Deployment / Howto¶
Documentation is in the process of being updated. Currently there are not too many major differences between CentOS Stream 9 and CentOS Stream 8, thus the documentation for CentOS Stream 8 may be helpful.