Upgrading the Major Version Operating System
This topic describes the additional steps needed to upgrade the operating system of a host managed by Cloudera Manager to a higher version for major releases
Upgrading the operating system to a different major release is called a major release upgrade. For example, upgrading from Redhat 6.8 to 7.4. This is a much more complex procedure and some operating systems do not support these upgrades without a complete OS reinstall. Therefore, this topic does not cover the procedures for upgrading specific operating systems.
In general, a major OS upgrade process requires shutting down all cluster components and Cloudera Manager. All Cloudera packages and parcels must be removed and reinstalled for the new OS.
This topic primarily describes all the additional steps such as backing up essential files and removing and reinstalling all the necessary Cloudera Enterprise packages and parcels.