This Script Configures ESXi DNS, NTP, SSH, PowerProfile and NetApp Advanced Options

ESXi-NetApp-Config.ps1

function Set-MyESXiOption {
    [CmdletBinding()]
    param( 
        [Parameter(Mandatory=$True, ValueFromPipeline=$False, Position=0)]
            [String] $Name,
        [Parameter(Mandatory=$False, ValueFromPipeline=$False, Position=1)]
            [String] $Value     
    )
    process {
        $myESXiOption = Get-AdvancedSetting -Entity $VMhost -Name $Name
        if ($myESXiOption.Value -ne $Value) {
            Write-Host "Setting ESXi Option '$Name' on Host '$($VMhost.Name)' to Value '$Value'"
            $myESXiOption | Set-AdvancedSetting -Value $Value -Confirm:$false | Out-Null
        }
        else {
            Write-Debug "ESXi Option '$Name' on Host '$($VMhost.Name)' already has the Value '$Value'"
        } 
    }
}

[array]$NTP = @("192.168.10.1", "192.168.10.2", "192.168.10.3")
[array]$DNS = @("192.168.10.1", "192.168.10.2", "192.168.10.3")
[String]$DomainName = "lab.local"
[String]$ClusterName = "Compute01"


$VMhosts = Get-Cluster -Name $ClusterName | Get-VMHost | Where-Object {$_.ConnectionState -eq "Maintenance"}

foreach ($VMhost in $VMhosts) {
   #region: Config NTP
   try {
       $VMhost | Remove-VMHostNtpServer -NtpServer ($VMhost | Get-VMHostNtpServer) -Confirm:$false 
   }
   catch [System.Exception] {
       Write-Warning "Error during removing existing NTP Servers on Host '$($VMhost.Name)'."    
   }
   foreach ($myNTP in $NTP) {
       $VMhost | Add-VMHostNtpServer -ntpserver $myNTP -confirm:$False | Out-Null
   }

   $NTPService = $VMhost | Get-VMHostService | Where-Object {$_.key -eq "ntpd"}
   if($NTPService.Running -eq $True){ 
       Stop-VMHostService -HostService $NTPService -Confirm:$false | Out-Null
   }
   if($NTPService.Policy -ne "on"){ 
       Set-VMHostService -HostService $NTPService -Policy "on" -confirm:$False | Out-Null
   }

   $HostTimeSystem = Get-View $VMhost.ExtensionData.ConfigManager.DateTimeSystem 
   $HostTimeSystem.UpdateDateTime([DateTime]::UtcNow) 

   Start-VMHostService -HostService $NTPService -confirm:$False | Out-Null
   #endregion

   #region: Configure DNS
   Get-VMHostNetwork -VMHost $VMhost | Set-VMHostNetwork -DomainName $DomainName -SearchDomain $DomainName -DNSAddress $DNS -Confirm:$false | Out-Null
   #endregion

   #region: Configure Static HighPower
   try {
       $HostView = ($VMhost | Get-View)
       (Get-View $HostView.ConfigManager.PowerSystem).ConfigurePowerPolicy(1)
   }
   catch [System.Exception] {
       Write-Warning "Error during Configure Static HighPower on Host '$($VMhost.Name)'."    
   }
   #endregion

   #region: Enable SSH and disable SSH Warning
   $SSHService = $VMhost | Get-VMHostService | Where-Object {$_.Key -eq 'TSM-SSH'} 
   if($SSHService.Running -ne $True){
       Start-VMHostService -HostService $SSHService -Confirm:$false | Out-Null
   }
   else {
       Write-Debug "SSH Service is already running on Host '$($VMhost.Name)'"
   }
   if($SSHService.Policy -ne "automatic"){
       Set-VMHostService -HostService $SSHService -Policy "Automatic" | Out-Null
   }
   else {
       Write-Debug "SSH Service is already set to Automatic Start on Host '$($VMhost.Name)'"
   }
   Set-MyESXiOption -Name "UserVars.SuppressShellWarning" -Value "1"
   #endregion

   #region: Set NetApp NFS Options "https://www.netapp.com/us/media/tr-4597.pdf - Appendix C"
   Set-MyESXiOption -Name "Net.TcpipHeapSize" -Value "32"
   Set-MyESXiOption -Name "Net.TcpipHeapMax" -Value "512"
   Set-MyESXiOption -Name "NFS.MaxVolumes" -Value "256"
   Set-MyESXiOption -Name "NFS41.MaxVolumes" -Value "256"
   Set-MyESXiOption -Name "NFS.MaxQueueDepth" -Value "64" #Non AFF Systems!
   Set-MyESXiOption -Name "NFS.HeartbeatMaxFailures" -Value "10"
   Set-MyESXiOption -Name "NFS.HeartbeatFrequency" -Value "12"
   Set-MyESXiOption -Name "NFS.HeartbeatTimeout" -Value "5"
   #endrefion

   #region: Set NetApp VAAI Options "Installing the NetApp® NFS Plug-in 1.1.2 for VMware® VAAI"
   Set-MyESXiOption -Name "DataMover.HardwareAcceleratedMove" -Value "1"
   Set-MyESXiOption -Name "DataMover.HardwareAcceleratedInit" -Value "1"
   #endregion

   #Region: Disable iSCSI Adapter (if necessary)
   Get-VMHostStorage $VMhost | Set-VMHostStorage -SoftwareIScsiEnabled $false -Confirm:$false | Out-Null
   #endregion

   #region: Restart Host
   $VMhost | Restart-VMHost -Confirm:$false | Out-Null
   #endregion
}