Goal: To upgrade my default instance from SQL Server 2012 to SQL Server 2014 in a failover cluster.
Given:
1) Operating System Windows 2012 R2
2) 2 Virtual Machines in a cluster with SQL Server as a Guest Cluster resource. The two VMS are called APPS08 and APPS09. They are our development environment that is setup similar to our production environment.
Problem: When running the SQL Server 2014 upgrade, I started on the VM that was not running the instance. I then moved onto upgrading on the node that was running the instance. As soon as the install attempt to failover the running instance
an install error occurred that it could not failover. After many install attempts I consistently received the errorThe SQL Server Failover cluster instance name 'Dev01'
already exists as a cluster resource. Opening Failover cluster manager there is no record of a DEV01.
New Strategy: Create a SQLCluster called DEV07. At the end of the Install I get 'Resource for instance 'MSSQLSERVER' should not exists. Neither I nor my Windows 2012 guy understand what Resource the install may be referring to. We do not see anything out of the ordinary.
Any suggestions as to what Resource may be seeing the default instance would be greatly appreciated.