Tearing the ESXi and VM live hosts to 4.1 and falling in vCenter environment 5.1

Hello

Can I please perform the following before the people here to get opinions on how you think it may be...

Basically, I'm planning a 5.1 vCenter vCenter 4.1 facility upgrade, but I'm not eager to upgrade in place due to my being uncomfortable with the 4.1 - > 5.1 upgrade instability.

Instead, I built an environment vSphere fresh 5.1, including:

SSO
The inventory service
UU.
vCenter
Web client
SRM

And he works with the internal certificates.  SRM has been integrated, data centres have been created, OS customizations are in place, empty clusters have been created with the same level of CVS, licenses have been imported and everything looks good to go.

The next part is to import all hosts ESXi 4.1 of their existing DRS, HA, cluster EVC, which is also protected by SRM.

However, the problem is that this must be done without interruption for the hosts or virtual machines running.  All NFS stores running the virtual machine.

So my plan is:
Unprotect all SRM protected virtual computer (to remove SRM placeholders in NFS and placeholder VMS in vCenter)
Reconfigure the deactivation DRS clusters, HA (with CVS)
Remove the cluster (guests will return to autonomous? VM will continue to operate?)
'remove' host of the old vmware vcenter
Add a host new vCenter
Add the host to the cluster again
Configure the SRM

I can see from google, that other people have already done, but this doesn't sound sane?

I want to avoid at all costs, downtime for the VM to place guests esxi in maintenance mode is not really an option.  So I need to check that the above is possible, and that the removal of the cluster will not stop the running virtual machine or to force some kind of hardware installation/panic on the virtual machine because of the VCA mode not more be applied. The VCA mode would be a big problem trying to admit the host/vm to the new cluster if the virtual machine have re-detected hardware of newer CPU...

Thanks in advance,
Rob.

You don't need to remove clusters or move the hosts off the clusters before you attach them to the new vCenter Server!

We have made the migration in the past (to a vCenter server to another) without this step and it worked fine.

In the new vCenter server, you can also directly add hosts to the cluster.

It works very well... unless you use the distributed switches! It is still possible, but requires additional steps.

-Andreas

Tags: VMware

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