When working with new and existing Foglight customers as they are planning to upgrade from vCenter 5.x to vCenter 6.x Infrastructure, the question is usually always asked, "Does Foglight support monitoring vSAN?" YES, Foglight supports monitoring vSAN. vSAN is Software-Defined Storage (SDS) or can be simply described as server-attached hard disks and/or flash devices, in 2 or more Hosts to create a high performing shared Datastore.
Foglight has vSAN Dashboards for -
Datastore vSAN Topology
Selecting the Host gives you performance metrics for Transfer Rate and IOps.
Selecting the DiskGroup expands to the Hard Disk Drive (HDD) and Flash Device in the group. Selecting the HDD or Flash Device expands to the performance metrics (a example of this can be seen in the Virtual Machine vSAN Topology).
In this vSAN Virtual Disks screenshot, you can see the VM and Hard disk 1 (.vmdk) and which Hosts the .vmdk are mirrored on. Including the Host that is playing the role of the Witness to the Components.
In this vSAN Physical Disks screenshot, you can see the Host to Physical Disk to Parent VM related objects.
Virtual Machine vSAN Topology
Cluster vSAN Topology
Host vSAN Topology