"CloudVM SYSTEM HEALTH CHECK", vCenter Server Appliance Overall health Status shows Gray during Upgrade Precheck in SDDC-Manager

Products

• VMware Cloud Foundation

Issue/Introduction

Symptoms:

• You are trying to upgrade a VCF (VMware Cloud Foundation) environment and upgrade pre-check fails during health check of vCenter Server Appliance
• Executing the command 'system.health.get' shows the status as gray on vCenter Server Appliance, sample screenshot pasted below :

• VCSA logs (/var/log/vmware/applmgmt.log) will show below error message

com.vmware.monitor.system not found in the health data
 

Note: This KB is applicable to VMware Cloud Foundation 4.1.x and 4.2.x versions.

Environment

VMware Cloud Foundation 4.1
VMware Cloud Foundation 4.2
VMware Cloud Foundation on VxRail 4.2
VMware Cloud Foundation on VxRail 4.1

Cause

This is caused due to a change in the APIs on vCenter Server, actual command to check the overall health of VCSA is "health.system.get"

Resolution

This issue is resolved in VMware Cloud Foundation 4.3.

Workaround:
Please follow below steps to workaround the issue :

• Check the health of vCenter Server Appliance using any of below methods

Appliance Management UI

• Login to VCSA VAMI Page using URL "https://<VC FQDN / IP>:5480" 
• Check the Health Status displayed in "Overall Health"

Sample Screenshot:

• If the Status shows "Good", ignore the VCF pre-check error and proceed with the upgrade

Appliance Management CLI

• Connect to VCSA using SSH (Eg. Putty)
• Execute the command "health.system.get" to check the VC Health Status

Sample Screenshot:

Note: In a VCF environment, default Appliance Shell should remain as "appliancesh", please do not change it.

• If the health shows green, ignore the VCF pre-check error and proceed with the upgrade