Hello,
I have an existing, functioning single-node SQL 2014 cluster running on Server 2012 R2 with iSCSI storage as the backend disk. I'm now at the point of needing to add a second node to this cluster.
When launching the SQL installation wizard to add a node to an existing cluster, it fails validation because it says the node is not part of a failover cluster. I thought that the wizard was going to do this for me, but ok, fair enough...I'll do that part myself.
What I'm confused about is what the proper steps are for adding a node to an existing cluster with shared iSCSI disk? If I map the existing iSCSI disks to my new node before it's part of the cluster, there's a risk of conflict/corruption because 2 nodes would be accessing the disk at the same time. However, it also appears that I can't run the full validation on the add node wizard without having the disk first mapped to the new node. I could skip validating the storage, but isn't this going to cause the cluster to soil itself if the new node comes online and the node isn't able to access the quorum disk?
It seems that I'm stuck in a catch 22, and Microsoft's documentation makes absolutely zero mention of what to do in this scenario.
Thanks for any assistance.