4.1 Conditions for Performing an In-Place Upgrade

In-place upgrades are supported for systems that run Oracle Linux 6 Update 5 or later only. The following conditions must also be met:

  • The system to be upgraded must meet the minimum installation requirements for Oracle Linux 7, see Section 1.1, “System Requirements”.

  • The Oracle Linux 6 system has been completely updated from the ol6_x86_64_latest channel or the ol6_latest repository.

  • Either the Unbreakable Enterprise Kernel Release 3 (UEK R3) or the Unbreakable Enterprise Kernel Release 4 (UEK R4) release must be installed on the system and it must be the default boot kernel. Upgrading from Unbreakable Enterprise Kernel Release 2 is not supported.

  • The Oracle Linux 6 system must have been installed with the Minimal set of software.

  • No Oracle product stack is present on the system.

If the RHCK is installed, it is upgraded as part of the process, but it must not be set as the default boot kernel.

If the system to be upgraded contains valuable data, make a backup or snapshot of the system so that you can recover it to its previous state if the upgrade fails.

Before you upgrade, check the release notes for any known issues with upgrades. See the Oracle Linux 7 documentation at https://docs.oracle.com/cd/E52668_01/index.html.

To perform an in-place upgrade you must install some additional packages and their dependencies. The system should have access to the Unbreakable Linux Network (ULN), Oracle Linux yum server, or a local yum server.