The upgrade Procedure can be found in the official documentation here.

In addition to the above details
+ Service Status: Check all services are running & healthy. For checking this, login to vRNI Platform Appliance with consoleuser credentials and then type the command
show-service-status –debug –cluster

+ Disk Latency: It should be 5 ms.

+ Once you upload the bundle, in UI, you should see message notification saying “Bundle Upload Complete“. In the restapilayer logs you would see

Click on the Image to view

You would see all vRNI Platform VMs upgrading first one-by-one. Once this is done, you should be able to access the UI, however, once you goto vRNI UI -> Settings -> Install & Support, you would see the message “Version mismatch detected”. This would get fixed once all vRNI Proxy VMs are upgraded as well.

+ During upgrade from vRNI 4.1 to 5.0, the Operating System of vRNI setup (Platforms and Collectors) is upgraded from Ubuntu 14.04 to Ubuntu 16.04.
+ During upgrade from 4.1 to 5.0, vRNI setup VMs are rebooted as part of the upgrade process.
+ It takes around 1-2 hours to upgrade a  vRNI setup. But, if you are upgrading from 4.1 to 5.0 then a single node setup takes around 1-2 hours and around 3-4 hours to upgrade a cluster. The upgrade time does not depend on the number of nodes. After upgrade,  vRNI takes around two to three hours to reflect the latest data in UI.
+ vRNI does not support rollback or product downgrade. You must take a backup before you proceed to upgrade. For more information about the back up and restore process refer to the KB article.