In an earlier post, I described the witness appliance in a lot of detail. Using the witness appliance is VMware’s recommended way of creating a witness host. Ideally, customers should avoid building their own bespoke appliances for this purpose. Also note that the witness appliance is not a general purpose ESXi VM. It doesn’t store/run nested VMs, and it has no VM or HA/DRS related functions. It simply functions as a VSAN witness and plays no other role. In this post, I will take you through step by step instructions on how to deploy a witness appliance for either a…
As part of the Virtual SAN 6.1 announcements at VMworld 2015, VMware announced two new, eagerly anticipated features. The first of these is VSAN stretched cluster, allowing you to protect your virtual machines across data centers, not just racks. And the second is 2-node VSAN, which will be an excellent solution for remote office/branch office (ROBO) configurations. To allow these configuration to work, a dedicated witness host is required. For those of you already familiar with VSAN, a witness component is used in the event of a split brain to figure out if the virtual machine objects have a quorum.…