Warning: A few others and myself have noticed that when updating a VCHA Cluster to 6.5U1 it resets the hostname to localhost.localdomain stopping vCenter Web Client from Loading. It seems to be isolated to Advanced Deployments and not Basic. I would recommend destroying your VCHA Cluster, updating, then redeploying in this scenario. Warning2: It also seems that if you try to redeploy VCHA Advanced after an upgrade, it still resets the hostname, I have a case opened and will update here as neccessary.
I wanted to share this handy script i created when you have a need to build out a new vCenter.
This script can be extremely handy as it will take care of creating the datacenter, cluster, adding hosts, creating datastores and then applying the appropriate host profile. It is all done via CSV files so it is extremely customizable.
Files to modify to customize your configuration createdatacenter.csv - Contains the name of the datacenter to create.