Help the migration of virtual machines

My company is changing the data center in a co-location facility. How the migration is performed, there are ESXi hosts and storage shared at Camp already. Data warehouses are replicated to the storage to the camp of data stores with the same name. The plan was to stop the virtual machines in the data center, removal of the inventory, browse the data store of one of the colo ESXi servers and add the virtual machine to inventory... Rinse and repeat.

The problem we encountered had to do with the fact that each virtual machine has VMDK on several data stores. This process only acknowledged the change of the primary VMDK, VMX file was always looking for 2 other volumes on the old warehouses of data, which could not be accessed camp.

I have to think that there is a way to generate scripts to avoid this problem to occur. If we know the identifier for the new storage volume, we should be able to generate scripts, Yes?

I would like the script to read the VM names from a txt file, remove the virtual machine from the inventory on host1, browse the host2 data store (which is at Camp) and add the machine virtual inventory and then remove and re-add the other volumes, based on the name of the data store (if hard disk 2 is on datastore2 then use 9d0fac87...)

Any help would be grately appreciated!

Thanks in advance!

-Ben

Hello, BenLiebowitz-

I looked through your script. You were just on a good amount of it. There are a couple of things to tweak and a number of things to correct. Here is the script of update from what I've seen would / should change (and here is the explanation of the things that I've changed the code).

# export list of Staging VMsGet-Folder -Name "Staging" | Get-VM | select Name | Sort Name | Export-CSV "c:\staging.csv" -NoTypeInformation

# Get Staging VMs$stg = Get-Folder -Name "Staging"

 # Shutdown VMs (cleanly)$stg | Get-VM | Shutdown-VMGuest -Confirm:$false

# Remove Hard Disk 2 and 3$stg = $null$stg = Get-Folder -Name "Staging"    ## getting Staging folder again$hdName2 = "Hard disk 2"$hdName3 = "Hard disk 3"$stg | Get-VM | Get-HardDisk -Name $hdName2,$hdName3 | Remove-HardDisk -Confirm:$false

# Remove VMs from InventoryGet-Folder -Name "Staging" | Get-Inventory | Remove-Inventory -Confirm:$false

## then, disconnect from the vCenter to which you were connected

## then, when connected to the vCenter server in the co-location facility:# Add VMs to Inventory$esxhost = "prpp6-vmwhst23.i3global.net"$datastore1 = "someDatastoreName" ## need to set this value!

## and, add hard disks back to VMsforeach ($row in (Import-Csv c:\staging.csv)) {    $vmName = $row.Name    $vmxfile = "[$datastore1] $vmName/$vmName.vmx"    $vmNewVM = New-VM -VMFilePath $vmxfile -VMhost $esxhost

    # Add hard Disks 2 and 3    New-HardDisk -VM $vmNewVM -DiskPath "[transient_deviceid] $vm/$vm.vmdk"    New-HardDisk -VM $vmNewVM -DiskPath "[data_deviceid] $vm/$vm.vmdk"} ## end foreach

Comments about what I've updated / changed:

To stop the virtual machines, you should be able to all channel the results of Get - VM directly to Shutdown-VMGuest (I rewrote which)
to remove the hard drive, 2 and 3, you can use the cmdlet Remove-hard drive and do it in the pipeline (I rewrote which)
- the ' $vm = Get - VM $stg | Get-show"line in the foreach loop was going to be problematic, as you had: '$vm' contains managed objects views for all the virtual machines in the folder of staging, not only of the virtual machine currently being acted on this iteration, so things have been broken
the remove inventory line, you might want to add "-confirm: $false", as the default behavior may be at the request of confirmation
the "$esxhost = prpp6 - vmwhst23.i3global .net' line needed quotes the host name
you do not use the $fields variable anywhere, which can be removed
I've renamed the variable '$add' to '$row' for a little more clarity
in the part that adds the virtual machines to the inventory in the co - lo vCenter:
- the part that tries to set the value of "$vm" is not quite right; I've updated that (and changed the name of the variable "$vmName" for clarity)
- you did not initialize the variable "$datastore1" - you must set a value for it (and how you use it assumes that all of the virtual machines in the co - lo facility are on the same data store - is this the case?)
- you need square brackets around the name of store data and quotes around the value for $vmxfile
- for the call of New - VM, you might consider providing a folder with - location (if you want the VMs newly saved to a particular folder)
- for calls of New-hard drive, you need quotes around the value - DiskPath

I would give that a shot with just a single machine and see how things are going. Let us know the result.

Tags: VMware

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