I read yesterday that VMware has updated the “Microsoft Clustering on VMware vSphere: Guidelines for Supported Configurations” KB article linked here to include SQL Server 2012 AlwaysOn Failover Clusters. That’s fantastic news! I’ve known it works great for quite a while now, but it’s always nice icing on the cake to have the company publicly update their support policies.
As per the latest VMware vSphere 5.1 document “Setup for Failover Clustering and Microsoft Cluster Service“, up to five MFC nodes are now supported per cluster. Again, this is great news. The document talks about the various options of configuring MFC on vSphere and does a great job with specific configuration details usually missed (or ignored) by folks that I know that cluster on vSphere.