The following script will accept a vCenter and two datastores as input, and move VMs from the source to the destination one at a time. The requirement for this script was to perform the migration without babysitting, but to not overwhelm the storage infrastructure by kicking off tons of VMs at once.
Here’s the script – feel free to modify or copy! Load it by running the .ps1 file, then use the Migrate-DS command to perform the migration.
<#
.SYNOPSIS
Moves VMs between datastores.
.DESCRIPTION
Moves VM’s from one datastore to another in a controlled fashion using svMotion.
.PARAMETER vCenter
The FQDN of the vCenter server to connect to.
.PARAMETER Source
The datastore to copy VMs from.
.PARAMETER Destination
The datastore to copy VMs to.
.EXAMPLE
PS C:> Migrate-DS -vCenter VC01.company.local -Source ds01 -Destination ds02
.EXAMPLE
PS C:> Migrate-DS VC01 ds01 ds02
#>
[CmdletBinding()]
Param(
[Parameter(Mandatory=$True,Position=1,
HelpMessage="Enter a valid vCenter server to connect to.")]
[string]$vCenter,
[Parameter(Mandatory=$True,Position=2,
HelpMessage="Enter a valid source datastore.")]
[string]$Source,
[Parameter(Mandatory=$True,Position=3,
HelpMessage="Enter a valid destination datastore.")]
[string]$Destination
)
$ErrorActionPreference= ‘silentlycontinue’
Function Log ($logText){
$date = Get-Date
Add-Content -Path "Migration Log – $Source to $Destination.log" -Value "$date $logText" -Force
}
Log("Moving all VMs from $Source to $Destination")
Connect-VIServer $vCenter -Force
Log("Connected to $vCenter")
$toMove = Get-VM -Datastore $Source
Write-Host `nMoving $toMove.Length VMs from $Source to $Destination -ForegroundColor Green
Write-Host `n
$numVM = $toMove.Length
Log("Moving $numVM VMs…")
$toMove | ForEach {
$vm = $_.Name
$date = Get-Date
Write-Host Beginning move of $vm at $date
Log("Beginning move of $vm")
try {
Get-VM $_ | Move-VM -Datastore $Destination -Confirm:$false > $null
$date = Get-Date
Write-Host Finished moving $vm at $date! -ForegroundColor Yellow
Write-Host `n
Log("Finished moving $vm")
Add-Content -Path "Migration Log – $Source to $Destination.log" -Value " " -Force
} catch {
$date = Get-Date
Write-Host "There was an error moving $vm at $date!" -ForegroundColor Red
Write-Host `n
Log("Error moving $vm")
Add-Content -Path "Migration Log – $Source to $Destination.log" -Value " " -Force
}
}
Write-Host "Moved all VM’s! Exiting…" -ForegroundColor Green
Log("Moved all VM’s! Exiting…")
}
[/code]
