Impact/Mechanisms for OS Updates for SCS

Swarm Cluster Services (SCS) runs on CentOS/RHEL 7.9. While newer versions of the operating system are available, the following must be considered:

• Podman (container runtime) version

• Other software dependencies

As long as the operating system is version 7.9, updates and upgrades to the operating system and other installed software are allowed.

Podman Version

SCS requires podman 3.x to be installed and available. Newer versions of CentOS/RHEL starting with 8.0 ship with podman 4.x, which is currently incompatible with SCS. If this version of podman is used, then Swarm Storage nodes will not be able to boot due to changes in the way that podman handles network traffic during the PXE booting process.

The version of podman that is present in the DataCore-provided repository is the version that should be used. Please follow the installation instructions for SCS to ensure that the proper version of podman is installed.

Other Dependencies

While SCS does not have many dependencies on external software, the dependencies that do exist have changed packaging between CentOS/RHEL 7.9 and 8.x. This means that attempting to install the SCS RPM is likely to fail on versions of the operating system later than 7.x.