VMware has just published a KB article (KB 2086946) [Temporally down] on using Microsoft failover clustering services to support high availability of vCenter 5.5 U2. My assumption for this support is the demise of the vCenter Heartbeat product. I appreciate VMware giving customers a new choice for vCenter high availability.
Slightly buried in this gem of a KB article, in the original version, was the new support for using SQL 2012 Always-On Availability Groups for the vCenter database! However, the KB was since pulled and I’m told by VMware it was published in error. In fact, AAGs have not been qualified and are not supported for the vCenter database. If you are a customer that wants vCenter DB SQL AAG support, then escalate to your TAM and make your opinion heard. In case you missed it, vCenter 5.5 does support the ‘traditional’ shared storage SQL cluster configuration for vCenter.