This migration plan will work?

Infrastructure of "old":

2 x ESX v3.5 hosts

vCenter v2.5

iSCSI SAN storage

'New' infrastructure:

3 x ESXi hosts v4.1

vCenter v4.1

Shared SAS storage

Hosts/vCenter OLD can speak of NEW hosts/vCenter via 1 Gbps ethernet LAN (they are on different IP subnets, but routing is enabled via the intermediate firewall).

FORMER storage is quite different/separate from the NEW storage.

I guess my best/more sure bet is a kind of migration cold.  Perhaps something like the following:

1. close the old VM reviews OLD infrastructure

2. start using Converter CD

3 convert the VM (virtual to virtual) and bring it up to more on the NEW infrastructure

4 tinker with things like (VMXNET3) network card and so forth if necessary

with my 'out back' strategy being simply initialize the guest VM still on the OLD infrastructure if something does not work.

Is to be too careful?  I have problems I have not planned?

Second question:

I have a 1 virtual Windows Server 2003 domain controller that must also be migrated.  He is the owner of all the roles of "PDC".  My secondary DC at this time is a physical machine.  My migration to this VM DC plan would be as follows:

1. close all virtual machines on the OLD network (weekend break) including vCenter 2.5 VM

2. turn off too physical DC

3. connect the host to ESX v3.5 using credentials of 'root '.

4. start the VM OLD DC with Converter CD

5 convert the virtual machine (virtual to virtual) and bring it up to more on the NEW infrastructure

6. tinker with the network card, etc.

7. If he's fine, starts replication DC and physical verification

8. If it's fine, remaining boot VMs

with my 'out back' strategy being simply start the domain controller in VM still on the OLD infrastructure if something does not work.

I'm worried about it.  Y at - it no chance that this 'material change' will cause the DC is to lose communication with each other?  I'd be better to:

A. build a new DC on the NEW infrastructure

FSMO roles (b) transfer to the new domain controller

C. remove the old DC on the OLD infrastructure (avoiding thus have to migrate)

Would appreciate any suggestions.

With converter, you can make a copy of the host to host so I wouldn't bother start the virtual machines with the cold clone CD.

Personally I add 3.5 hosts to vCenter 4.1 and clone virtual machines.  Do not change the HW version if you don't want this weekend.

Tags: VMware

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