Ripping a 4.1 host in a new 5.5 Cluster WITHOUT access 4.1 vCenter Server

I have a client who has his 2 4.1 vSphere hosts in a cluster of vCenter 4.1 which is NOT under its control or access. vCenter server access is with a 3rd party that he is nervous on his account supported by a new provider. I'm looking for the safest method (preferable without interruption) to import these 2 hosts into a whole new vSphere 5.5 cluster with 2 new hosts and vCenter 5.5 server. He has access to individual hosts via the vSphere Client as well as its local based NAS storage where the virtual machine of the resident. The end result is vMotion and Storage vMotion, virtual machine on the new guests and new storage without interruption then remove the old hosts.

This is possible without any downtime of the virtual machine. However, as you deploy new fresh vCenter again, you will need to reconfigure settings HA/DRS. Also, since you have no control over the old vCenter, given old vCenter performance you can't as well. If you don't care about performance data, you're good to go.

Here's how you can make this migration:

1. deploy the new vCenter: for your condition: vCenter device will work just fine: reference:http://www.virten.net/2013/09/vmware-vcenter-server-appliance-5-5-vcsa-limitations/

2. create the cluster on new vCenter, set up the same.  first add your new ESXi 5.5 clustered host. Make sure that the shared on the old host ESXi storage is visible on the new host as well. If it is not possible, you can run without shared as well storage vMotion. Reference:VMware vSphere 5.1

3. now you can add your old webhost to the new cluster, make sure that vMotion requirement are already configured:

Documentation Centre of vSphere 5.5

4. Add your old host to new cluster. Once you add these ESXi host in new vCenter, both will be disconnected automatically old vCenter. If your host processors are different, you must enable EVC: make sure you understand impact of the VCA, the same configuration.

Reference: VMware vSphere 5.1

VMware KB: Enhanced vMotion compatibility (EVC) support processor

VMware KB: EVC and CPU compatibility FAQ

VMware KB: Activation CVS on a cluster when vCenter Server is running in a virtual machine

5. you can migrate your old Web host VMs to new host, once the migration is complete, you can keep your old Web host in maintenance mode and remove the same.

Tags: VMware

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