VMware vSAN does not provide any file serving capabilities of its own.
Therefore it relies on Windows guest VMs (SMB) and/or Linux guest VMs (NFS) to provide file services on top of vSAN. These file services can be made highly available by using clustering techniques.
Another alternative is to use virtual storage appliances from a third-party to host file services on top of vSAN. Examples are: EMC UnityVSA, NetApp ONTAP Select, Nexenta NexentaStor Virtual Storage Appliance.
Nexenta NexentaStor Virtual Storage Appliance 5.1.2 is certified as VMware Ready for VMware VSAN 6.7.