Sql-server – Always On Stand Alones

availability-groupsconfigurationsql serversql server 2014

Can I add a Stand Alone instance to a Windows Failover Cluster for Always On set up?

I need to have one secondary synchronous replica with automatic failover.

Best Answer

I think you're asking if you need to reinstall SQL Server on the existing node you're adding to the cluster.

If it's just availability groups, and you want to add an existing instance, this is easy. You just add the computer to the cluster and enable AG in SQL Configuration Manager.

It's different to the old Failover Cluster Instances where you had to install SQL Server in "cluster mode". For a plain AG it's not required.