Set-VMHVHostStartPolicy.ps1

#Requires -Version 4.0
# Requires -Modules VMware.PowerCLI

<#
.SYNOPSIS
    Modifies the host default start policy

.DESCRIPTION

.NOTES
    This PowerShell script was developed and optimized for ScriptRunner. The use of the scripts requires ScriptRunner. 
    The customer or user is authorized to copy the script from the repository and use them in ScriptRunner. 
    The terms of use for ScriptRunner do not apply to this script. In particular, ScriptRunner Software GmbH assumes no liability for the function, 
    the use and the consequences of the use of this freely available script.
    PowerShell is a product of Microsoft Corporation. ScriptRunner is a product of ScriptRunner Software GmbH.
    © ScriptRunner Software GmbH

.COMPONENT
    Requires Module VMware.PowerCLI

.LINK
    https://github.com/scriptrunner/ActionPacks/tree/master/VMware/Host

.Parameter VIServer
    Specifies the IP address or the DNS name of the vSphere server to which you want to connect

.Parameter VICredential
    Specifies a PSCredential object that contains credentials for authenticating with the server

.Parameter HostId
    Specifies the ID of the host want to modify

.Parameter HostName
    Specifies the name of the host want to modify

.Parameter Enabled
    Indicates that the service that controls the host start policies is enabled

.Parameter StartDelay
    Specifies a default start delay of the virtual machines in seconds

.Parameter StopAction
    Specifies the default action that is applied to the virtual machines when the server stops

.Parameter StopDelay
    Specifies a default stop delay of the virtual machines in seconds

.Parameter WaitForHeartBeat
    Specifies whether the virtual machines should start after receiving a heartbeat from the host, ignore heartbeats, 
    and start after the StartDelay has elapsed ($true), or follow the system default before powering on ($false)
#>

[CmdLetBinding()]
Param(
    [Parameter(Mandatory = $true,ParameterSetName = "byID")]
    [Parameter(Mandatory = $true,ParameterSetName = "byName")]
    [string]$VIServer,
    [Parameter(Mandatory = $true,ParameterSetName = "byID")]
    [Parameter(Mandatory = $true,ParameterSetName = "byName")]
    [pscredential]$VICredential,
    [Parameter(Mandatory = $true,ParameterSetName = "byID")]
    [string]$HostId,
    [Parameter(Mandatory = $true,ParameterSetName = "byName")]
    [string]$HostName,
    [Parameter(ParameterSetName = "byID")]
    [Parameter(ParameterSetName = "byName")]
    [bool]$Enabled,
    [Parameter(ParameterSetName = "byID")]
    [Parameter(ParameterSetName = "byName")]
    [int32]$StartDelay,    
    [Parameter(ParameterSetName = "byID")]
    [Parameter(ParameterSetName = "byName")]
    [ValidateSet("None","Suspend","PowerOff","GuestShutdown")]
    [string]$StopAction,
    [Parameter(ParameterSetName = "byID")]
    [Parameter(ParameterSetName = "byName")]
    [int32]$StopDelay,
    [Parameter(ParameterSetName = "byID")]
    [Parameter(ParameterSetName = "byName")]
    [bool]$WaitForHeartBeat
)

Import-Module VMware.PowerCLI

try{
    $Script:vmServer = Connect-VIServer -Server $VIServer -Credential $VICredential -ErrorAction Stop

    if($PSCmdlet.ParameterSetName  -eq "byID"){
        $Script:vmhost = Get-VMHost -Server $Script:vmServer -Id $HostId -ErrorAction Stop
    }
    else{
        $Script:vmhost = Get-VMHost -Server $Script:vmServer -Name $HostName -ErrorAction Stop
    }

    $poli = Get-VMHostStartPolicy -Server $Script:vmServer -VMHost $Script:vmhost -ErrorAction Stop
    [hashtable]$cmdArgs = @{'ErrorAction' = 'Stop'
                            'VMHostStartPolicy' = $poli
                            'Confirm' = $false
                            }                            

    Set-VMHostStartPolicy @cmdArgs -Enabled $Enabled
    if($StartDelay -gt 0){
        Set-VMHostStartPolicy @cmdArgs -StartDelay $StartDelay
    }
    if($StopDelay -gt 0){
        Set-VMHostStartPolicy @cmdArgs -StopDelay $StopDelay
    }    
    if($PSBoundParameters.ContainsKey('StopAction') -eq $true){
        Set-VMHostStartPolicy @cmdArgs -StopAction $StopAction
    }
    if($PSBoundParameters.ContainsKey('WaitForHeartBeat') -eq $true){
        Set-VMHostStartPolicy @cmdArgs -WaitForHeartBeat $WaitForHeartBeat
    }

    $result = Get-VMHostStartPolicy -Server $Script:vmServer -VMHost $Script:vmhost -ErrorAction Stop | Select-Object *

    if($SRXEnv) {
        $SRXEnv.ResultMessage = $result
    }
    else{
        Write-Output $result
    }
}
catch{
    throw
}
finally{    
    if($null -ne $Script:vmServer){
        Disconnect-VIServer -Server $Script:vmServer -Force -Confirm:$false
    }
}