vSAN Migration - 3 Node

[arvinmquizon]

Hi Experts,

We'll be having a migration to vSAN infrastructure from a vsphere cluster. What would be the best setup to migrate the virtual machines to vSAN Cluster that has a 3 node setup. (FTTs, RAID)?

Thank you and appreciate all your answers.

[TheBobkin]

Hello Arvin,

3-node clusters have fairly limited options with regard to the Fault Tolerance Method (FTM), FTT and RAID - basically have a choice of FTT=1 via RAID1 FTM or FTT=0 (RAID0 technically as still can be striped). So work out the space required for your current VMs that you plan to migrate and ensure you have enough space on the vsanDatastore bearing in mind that FTT=1 VMs will use 2x their current disk-space usage once migrated over.

The migration process itself is fairly straight-forward - vMotion Storage and Compute, choose vSAN hosts as destination, choose vSAN Default Storage Policy (SP) as Policy to be applied to the VMs (or a created FTT=0 SP for any disposable VMs).

Bob

[arvinmquizon]

For the network what would be the best setup. Having a server that has a 2x 10GB ports and 4x 1GB? Is it okay to have a setup like this. 2x 1GB for Management, 2x 1GB for Production and 2x 10GB for VMotion (since the vms are storage driven vms).

Correct me if I'm wrong,  the HA traffic for cluster will go thru the VMotion port?

Thank you Bob. Appreciate your answer for my inquiry.

[arvinmquizon]

I mean 2x 1GB for Management, 2x 1GB for Production and 2x 10GB for VMotion and VSAN (since the vms are storage driven vms).

[TheBobkin]

Hello Arvin,

Apologies, I am not sure I follow you here:

Do you have a distinct vmk interface configured just for vSAN or do you vMotion enabled on this same vmk?

If this is the case, this can cause issues and should be split out accordingly.

Some resources to check your configuration against and for further reading:

docs.vmware.com/en/VMware-vSphere/5.5/com.vmware.vsphere.storage.doc/GUID-8408319D-CA53-4241-A3E4-70057F70030F.html

docs.vmware.com/en/VMware-vSphere/6.0/com.vmware.vsphere.virtualsan.doc/GUID-031F9637-EE29-4684-8644-7A93B9FD8D7B.html

kb.vmware.com/kb/2058368

https://storagehub.vmware.com/#!/vmware-vsan/vmware-r-vsan-tm-network-design

https://storagehub.vmware.com/export_to_pdf/vmware-r-vsan-tm-network-design

Bob

[RAJ_RAJ]

Please refer # Best practices for using vSAN 6.5 iSCSI devices

Design Document over there is very useful.