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Data Migration


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We are moving from a traditional model with shared storage to Nutanix and I'm wondering what my options are for data migration.

Our current traditional model looks like this:
-3 node cluster
-FC storage array
-ESXi version 5.5
-vCenter 5.5
-1Gbps network

Our new Nutanix model looks like this:
-3 node Nutanix cluster
-NFS local storage
-ESXi version 6.0 update1a
-vCenter 6.0 update1a
-4Gbps network (NIC teamed 4x1Gbps)

I'd like an option that requires little to no VM down time if possible. We currently have 2 vCenter servers (1 for the old cluster and 1 for the Nutanix cluster).

Can I create an NFS export so I can access the Nutanix storage from my old ESXi hosts? Can I add HBAs in my Nutanix hosts so I can connect to my shared storage FC fabric? Is VMware's standalone converter an option? Will I need to move the old hosts to the new vCenter to be able to live migrate the VMs from the old cluster to the new? Which option requires the least amount of VM downtime?

Any help or guidance is greatly appreciated.

Thanks,
-Kevin


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Best answer by Jon 10 February 2016, 00:07

RE vCenter - Yes, you've got to have them in the same vCenter server

RE VSS / VDS, etc - yes, you need to have VSS on at least one target HOST, nothing to do with vCenter

Basically you can just DROP one physical uplink on ONE nutanix node, configure VSS for that node (you dont have to do LACP, just do one link, no physical switch changes), and use that is your "gateway" into the new environment.

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7 replies

Userlevel 1
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Since you are moving esxi to esxi there are a few options.

1. If you use the vmware web client you can do a storage vmotion as a shared nothing between the clusters.

2. Create a NFS whitelist from prism -- gear icon -- to allow the remote storage to mount the Nutanix datastore

I wouldn't add the FC HBA to the Nutanix nodes

3. Yes you could add one of the old hosts to the new vCenter too

Here is a KB that's talks about this in greater detail

https://portal.nutanix.com/#/page/kbs/details?targetId=kA0600000008SdpCAE


Userlevel 7
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Theres a couple different ways to do this.

The easiest way is to simply connect to new vCenter to the 5.5 hosts (you can basically just "suck them in" to the new vCenter, pretty easy), and then use the "Shared Nothing" vMotion migration method to get from the 5.5 environment to the Nutanix environment.

This will work without any downtime, and basically does a storage vMotion and regular vMotion at the same time. Very slick stuff.

This KB touches on the process: https://portal.nutanix.com/#/page/kbs/details?targetId=kA0600000008hR9CAI
Userlevel 7
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Also, for the sake of transparency, I just submitted an internal request to merge these two KB's to make this more centralized.
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The "shared nothing" approach seems ideal. So, in that scenario I just need to have both clusters in the same vCenter correct? There is no need to whitelist my old hosts on the Nutanix NFS storage?

Also, we are using virtual standard switches in the old model and we're using a virtual distributed switch in the new model, is that going to be an issue? I'm using LACP in the old model and VMware LBT in the new model so I will have to temporarily build-out the VSS switches in the new vCenter to be able to migrate the old hosts to the new vCenter right?
Userlevel 7
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RE vCenter - Yes, you've got to have them in the same vCenter server

RE VSS / VDS, etc - yes, you need to have VSS on at least one target HOST, nothing to do with vCenter

Basically you can just DROP one physical uplink on ONE nutanix node, configure VSS for that node (you dont have to do LACP, just do one link, no physical switch changes), and use that is your "gateway" into the new environment.
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HI John,

How about the VM's with RDM attached to it. How we can storage vmotion them?

Any idea.

I have Netapp provisioned to Vmware farm. and now want to migrate complete Netapp box to Nutanix storage.

What would be the best way to migrate from Netapp to Nutanix.
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I'm curious to hear about this as well, especially if anyone has gone throught a NetApp migration. We have HP G9 servers using NFS and 16gb FC into NetApp AFF and FAS SANs, and also some RDM connections for things like Exchange.


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