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Chapter 1. Supported upgrade paths
Currently, it is possible to perform an in-place upgrade from RHEL 8 to the following target RHEL 9 minor versions:
| System configuration | Source OS version | Target OS version |
| SAP HANA | RHEL 8.8 | RHEL 9.2 |
| RHEL 8.10 | RHEL 9.4 | |
| SAP NetWeaver and other SAP Applications | RHEL 8.8 | RHEL 9.2 |
| RHEL 8.10 | RHEL 9.4 |
SAP HANA is validated by SAP for RHEL minor versions that receive package updates for more than 6 months. Currently, the supported in-place paths of an SAP HANA system are from RHEL 8.8 to RHEL 9.2 and from RHEL 8.10 to RHEL 9.4. The rest of this document describes restrictions and detailed steps for upgrading an SAP HANA system.
SAP NetWeaver is validated by SAP for each major RHEL version. The supported in-place upgrade paths for this scenario are the two latest EUS/E4S releases which are supported by Leapp for non-HANA systems as per the Upgrading from RHEL 8 to RHEL 9 document. Certain deviations from the default upgrade procedure are described in Section 4. Upgrading an SAP NetWeaver system. For systems on which both SAP HANA and SAP NetWeaver are installed, the SAP HANA restrictions apply.
Please refer to the topic Planning an upgrade to RHEL 9 for more details on limitations.
For cloud providers (AWS, Azure, and GCP), PAYG VMs on RHUI, and for both options, RHEL for SAP HA and US and RHEL for SAP Applications, there is a known bug in upgrading from 8.10 to 9.4 due to a RHUI client rpm name difference in 8.10 compared to previous releases. The upgrade is not possible at the moment, and there is no workaround. The upgrade from 8.8 to 9.2 is not impacted.
