This script allows you to run a command on an Azure Arc machine using the API.

Run-AzureArcCommand.ps1

# ============================================================================
# Name: Run command on Azure Arc machine
# ============================================================================
# Author: Blake Drumm (blakedrumm@microsoft.com)
# Website: https://blakedrumm.com/
# Date created: April 4th, 2024
# ============================================================================

$AzureRmContext = Connect-AzAccount

if (-not $AzureRmContext)
{
	Write-Error "Failed to authenticate to Azure."
	return
}

# Null out the response
$Response = $null

# Get the access token
$AccessToken = (Get-AzAccessToken -ResourceUrl https://management.azure.com).Token

# Define the subscription ID, resource group, and machine name
$SubscriptionId = "cc2ebf7f-fc13-4b4f-8a19-5f0e37f10aed"
$ResourceGroupName = "ResourceGroupName"
$MachineName = "AGENT01-2019"
$Location = "eastus" # Ensure to use the correct location for your resource

# Formulate the REST API URL for the runCommand operation on a connected machine
$RunCommandName = "RunCommandName"
$ApiVersion = "2023-10-03-preview" # Make sure to use the current API version
$Url = "https://management.azure.com/subscriptions/$SubscriptionId/resourceGroups/$ResourceGroupName/providers/Microsoft.HybridCompute/machines/$MachineName/runCommands/$RunCommandName`?api-version=$ApiVersion"

# Prepare the header with the access token
$Headers = @{
	'Authorization' = "Bearer $AccessToken"
	'Content-Type'  = 'application/json'
}

# Constructing the body with the command
$Body = @{
	location   = $Location
	properties = @{
		source = @{
			script = "echo `"`$(Get-Date) - Hello World! Running on `$env:COMPUTERNAME !`""
		}
	}
} | ConvertTo-Json

# Send the PUT request to execute the command
$Response = Invoke-RestMethod -Uri $Url -Method Put -Headers $Headers -Body $Body

# Output the response
$Response

# ------------------------------------------------------------------------------------
#
# Get status of command executed above
# 
if (-not $AzureRmContext)
{
	Write-Error "Failed to authenticate to Azure."
	return
}

$x = 0
do
{
	# Send the GET request to retrieve the command details
	$Response = Invoke-RestMethod -Uri $Url -Method Get -Headers $Headers
	#cls
	# Output the response
	$Response.properties
	# Increase the count
	$x++
	Write-Output "`n`nChecked $x times"
	sleep -seconds 5
}
until ($Response.Properties.provisioningState -notmatch "Creating|Updating")

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