Server 2012 R2 – Failover Cluster error

So I was installing SQL2008R2 (In 2015? I know not my choice, it was for a legacy application) into a Windows Server 2012 R2 Failover Cluster. I hit the following error during the SQL install: “Rule Cluster Service Verification Failed. The SQL Server failover cluster services is not online”.

It turns out that some cluster installers (including SQL server) depend on the deprecated cluster.exe which is not installed by default. Additionally you cant add it via the GUI once the Failover Cluster feature has been installed so you need to run the following Powershell cmd to add the subfeatures:

Install-WindowsFeature rsat-clustering-cmdinterface,rsat-clustering-automationserver

Re-run the SQL installer and you should be good to go!

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