Upgrading the 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, including major and minor releases.
Upgrading the operating system to a higher version but within the same major release is called a minor release upgrade. For example, upgrading from Redhat 6.8 to 6.9. This is a relatively simple procedure that involves properly shutting down all the components, performing the operating system upgrade, and then restarting everything in reverse order.
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 to do it in-place, and some operating systems do not support these upgrades. Therefore, the procedures for upgrading specific operating systems are not covered in this topic.
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.