Upgrading vCenter 8 to vCenter 9: Fixing a Stage 2 Precheck DNS Resolution Error

vCenterVirtuallyWired

I was doing an in-place vCenter upgrade from vCenter 8 to vCenter 9 using the VCSA 9 ISO. Stage 1 (deploying the new appliance) completed fine, but Stage 2 prechecks failed with a generic “internal error” in the installer UI. In this post I’ll show how I troubleshooted and solved it.

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vCenter 7 Pre-Update Checks Error, Please Provide a Valid Version

vCenterVirtuallyWired0

I stumbled across this error when attempting to perform a Pre-Update check on my vCenter server. “Update 7.0.0.10400 not found. Please provide a valid update version” and “Update 7.0.0.10600 not found. Please provide a valid update version” This is a potentially a bug with Release 7.0.0.10300 vCenter Build 16189094. I decided to check the VAMI…

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