I have a 3 node, active-active-passive cluster. Node A host 2 SQL Server instances, node B 3rd instance. All are 2012. I need to add a temporary 4th instance to be hosted on the passive node for testing. I DO NOT want to create a new cluster or add a new node, but it appears that those are the only 2 options when running installer. I saw earlier posts here where people suggested creating a new cluster but that is not what I want to do. What are the steps to just add a new instance to my passive node?
Thanks in advance.
