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Thursday, April 16, 2020

vSAN File Services considerations

http://www.yellow-bricks.com/2020/04/15/vsan-file-services-considerations/

  • Targeted use case: Cloud Native Applications and file services for traditional apps
  • NFS v3 and NFS v4.1 are both supported
  • A minimum of 3 hosts within a cluster
  • A maximum of 64 hosts within a cluster
  • Not supported today on 2-node
  • Not supported today on a stretched cluster
  • Not supported in combination with vLCM (Lifecycle Manager)
  • It is not supported to mount the NFS share from your ESXi host
  • Maximum of 8 active FS containers/protocol stacks and 8 FS VMs are provisioned
  • FS VMs are provisioned by vSphere ESX Agent Manager
    • You will have one FS VM for each host up to 8 hosts
  • FS VMs are tied to a specific host from a compute and storage perspective, and they align of course!
  • FS VMs are not integrated with vSAN Fault Domains
  • FS VMs are powered off and deleted when going into maintenance mode
  • FS VMs are provisioned and powered on when exiting maintenance mode
  • On a standard vSwitch, the following settings are enabled on the port group automatically: Forged Transmits, Promiscuous Mode
  • On a Distributed Switch the following settings are enabled on the port group automatically: Forged Transmits, MAC Learning
  • vSAN automatically downloads the OVF for the appliance, if vCenter Server cannot connect to the internet you can manually download it
    • The ovf is stored on the vCenter Appliance here, if you ever want to delete it: /storage/updatemgr/vsan/fileService/
  • The FS VM has its own policy (FSVM_Profile_DO_NOT_MODIFY), which should not be modified!
    • The appliance is not protected across hosts, it is RAID-0 as resiliency is handled by the container layer!

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