Apply-AzVmPowerStatePolicy.ps1

<#
.SYNOPSIS
	Start/Stop Azure VM in parallel on schedule based on two VM Tags (PowerOn/PowerOff).
.DESCRIPTION
	This Azure Automation PowerShell Workflow type Runbook Start/Stop Azure VM in parallel on schedule based on two VM Tags (PowerOn/PowerOff).
.NOTES
	Author      ::	Roman Gelman @rgelman75
	Dependency  ::	AzureRm PowerShell module
	Version 1.0 ::	19-Jun-2016 :: Release
	Version 1.1 ::	20-Jun-2016 :: Error handling added
	Version 1.2 ::	07-Jul-2016 :: -WhatIf parameter type changed from [switch] to [boolean]
	Version 1.3 ::	25-Jun-2017 :: Flags '11:11:11' & '22:22:22' added to disable PowerOn/Off schedule
.LINK
	https://ps1code.com/category/powershell/azure/
#>

Workflow Apply-AzVmPowerStatePolicy
{
	Param (
		[Parameter(Mandatory, Position = 1)]
		[string]$AzureCredentialAsset = 'automation'
		 ,
		[Parameter(Mandatory, Position = 2)]
		[string]$AzureSubscription
		 ,
		[Parameter(Mandatory, Position = 3)]
		[string]$AzureResourceGroup
		 ,
		#[System.TimeZoneInfo]::GetSystemTimeZones() |ft -au
		[Parameter(Mandatory = $false, Position = 4)]
		[string]$AzureVmTimeZone = 'New Zealand Standard Time'
		 ,
		[Parameter(Mandatory = $false, Position = 5)]
		[boolean]$WhatIf = $true
	)
	
	$ErrorActionPreference = 'Stop'
	
	$azCredential = Get-AutomationPSCredential -Name $AzureCredentialAsset
	$null = Login-AzureRmAccount -Credential $azCredential
	$null = Set-AzureRmContext -SubscriptionName $AzureSubscription
	
	$AzVms = Get-AzureRmVm -ResourceGroupName $AzureResourceGroup |
	select Name, Tags, @{ N = 'PowerState'; E = { (Get-AzureRmVM -Name $_.Name -ResourceGroupName $_.ResourceGroupName -Status |
	select -expand Statuses | ? { $_.Code -match 'PowerState/' } |
	select @{ N = 'PowerState'; E = { $_.Code.Split('/')[1] } }).PowerState } } | sort Name
	
	Foreach -Parallel ($AzVm in $AzVms)
	{
		Try 
		{
			### Running VM ###
			if ($AzVm.PowerState -eq 'running')
			{
				### Flag to NOT PowerOff ###
				if ($AzVm.Tags.PowerOff -ne '22:22:22')
				{
					$azTime = [datetime]::Now
					$TimeShort = $azTime.ToString('HH:mm')
					$TimeVm = [System.TimeZoneInfo]::ConvertTimeFromUtc($TimeShort, [System.TimeZoneInfo]::FindSystemTimeZoneById($AzureVmTimeZone))
                    $TimeVmTime = $TimeVM.TimeOfDay

                    $powerOn = [datetime]$AzVm.Tags.PowerOn
                    $powerOnTime = $powerOn.TimeOfDay
                    $powerOff = [datetime]$AzVm.Tags.PowerOff
                    $powerOffTime = $powerOff.TimeOfDay
					
					### 00:00---On+++Off---00:00 ###
					if ($powerOnTime -lt $powerOffTime)
					{
						if ($TimeVmTime -gt $powerOffTime -or $TimeVmTime -lt $powerOnTime)
						{
							if ($WhatIf) { $Status = 'Simulation' }
							else
							{
								$Status = (Stop-AzureRmVm -Name $AzVm.Name -ResourceGroupName $AzureResourceGroup -Force).StatusCode
							}
							$Execution = 'Stopped'
						}
						else { $Execution = 'NotRequired' }
						
					### 00:00+++Off---On+++00:00 ###
					}
					else
					{
						if ($TimeVmTime -gt $powerOffTime -and $TimeVmTime -lt $powerOnTime)
						{
							if ($WhatIf) { $Status = 'Simulation' }
							else
							{
								$Status = (Stop-AzureRmVm -Name $AzVm.Name -ResourceGroupName $AzureResourceGroup -Force).StatusCode
							}
							$Execution = 'Stopped'
						}
						else { $Execution = 'NotRequired' }
					}
				}
			}
			### Not running VM (stopped/deallocated/suspended etc.) ###
			else
			{
				### Flag to NOT PowerOn ###
				if ($AzVm.Tags.PowerOn -ne '11:11:11')
				{
					$azTime = [datetime]::Now
					$TimeShort = $azTime.ToString('HH:mm')
					$TimeVm = [System.TimeZoneInfo]::ConvertTimeFromUtc($TimeShort, [System.TimeZoneInfo]::FindSystemTimeZoneById($AzureVmTimeZone))
                    $TimeVmTime = $TimeVM.TimeOfDay

                    $powerOn = [datetime]$AzVm.Tags.PowerOn
                    $powerOnTime = $powerOn.TimeOfDay
                    $powerOff = [datetime]$AzVm.Tags.PowerOff
                    $powerOffTime = $powerOff.TimeOfDay
					
					### 00:00---On+++Off---00:00 ###
					if ($powerOnTime -lt $powerOffTime)
					{
						if ($TimeVmTime -gt $powerOnTime -and $TimeVmTime -lt $powerOffTime)
						{
							if ($WhatIf) { $Status = 'Simulation' }
							else
							{
								$Status = (Start-AzureRmVm -Name $AzVm.Name -ResourceGroupName $AzureResourceGroup).StatusCode
							}
							$Execution = 'Started'
						}
						else { $Execution = 'NotRequired' }
						
					### 00:00+++Off---On+++00:00 ###
					}
					else
					{
						if ($TimeVmTime -gt $powerOnTime -or $TimeVmTime -lt $powerOffTime)
						{
							if ($WhatIf) { $Status = 'Simulation' }
							else
							{
								$Status = (Start-AzureRmVm -Name $AzVm.Name -ResourceGroupName $AzureResourceGroup).StatusCode
							}
							$Execution = 'Stopped'
						}
						else { $Execution = 'NotRequired' }
					}
				}
			}
			$Prop = [ordered]@{
				AzureVM       = $AzVm.Name
				ResourceGroup = $AzureResourceGroup
				PowerState    = (Get-Culture).TextInfo.ToTitleCase($AzVm.PowerState)
				PowerOn       = $AzVm.Tags.PowerOn
				PowerOff      = $AzVm.Tags.PowerOff
				StateChange   = $Execution
				StatusCode    = $Status
				TimeStamp     = $TimeVm
			}
		}
		Catch
		{
			$Prop = [ordered]@{
				AzureVM       = $AzVm.Name
				ResourceGroup = $AzureResourceGroup
				PowerState    = (Get-Culture).TextInfo.ToTitleCase($AzVm.PowerState)
				PowerOn       = $AzVm.Tags.PowerOn
				PowerOff      = $AzVm.Tags.PowerOff
				StateChange   = 'Unknown'
				StatusCode    = 'Error'
				TimeStamp     = $TimeVm
			}
		}
		Finally
		{
			$Obj = New-Object PSObject -Property $Prop
			Write-Output -InputObject $Obj
		}	
	}
} #End Workflow Apply-AzVmPowerStatePolicy