cloudformation.json

"EC2" : {
  "Type": "AWS::EC2::Instance",
  "Metadata": {
    "AWS::CloudFormation::Init": {
      "configSets": {
        "config": [
          "monitoring",
          "setup",
          "rename",
          "install",
          "finalize"
        ]
      },
      "monitoring": {
        "files": {
          "C:\\Program Files\\Amazon\\Ec2ConfigService\\Settings\\AWS.EC2.Windows.CloudWatch.json": {
            "source": "https://s3-ap-southeast-2.amazonaws.com/bbartifacts/software/AWS.EC2.Windows.CloudWatch.json",
            "Authentication": "BuildRole"
          },
          "c:\\cfn\\scripts\\set-cloudwatch.ps1": {
            "source": "https://s3-ap-southeast-2.amazonaws.com/bbartifacts/software/set-cloudwatch.ps1",
            "Authentication": "BuildRole"
          }
        },
        "commands": {
          "a-set-monitoring": {
            "command": "powershell.exe -executionpolicy unrestricted -file c:\\cfn\\scripts\\set-cloudwatch.ps1",
            "waitAfterCompletion": "0"
          }
        }
      }