How to pass a PowerShell script using user_data (AWS and Terraform)?

Question

I am trying to pass the PowerShell script as the file IIS.txt which is present in the CWD.

I don't see the script running on the server. I am not sure if I am missing something. Any help would be appreciated.

resource "aws_instance" "db1" {
  ami           = "ami-1234567890"  
  instance_type = "t3.small"
  subnet_id     = "${aws_subnet.db.0.id}"
  key_name      = "ireland"
  user_data     = "${file("IIS.txt")}"

  tags = {
    Name = "sql node 1"
  }
}

Could you share the directory structure in either ls -la or tree command outputs? If you're on windows, dir /s would do too. The IIS.txt file should be in the same directory where you run terraform commands. — SomeGuyOnAComputer
– SomeGuyOnAComputer, Commented Oct 3, 2019 at 19:02
C:\Users\%\Desktop\AWS\AWS\Running PS script through Terraform 10/03 03:47 PM <DIR> . 10/03 03:47 PM <DIR> .. 10/02 12:53 PM <DIR> .terraform 10/03 02:05 PM 133 IIS.txt 10/03 03:27 PM 1,254 Instances.tf 06/21 06:44 AM 116 Provider.tf 10/03 03:47 PM 157 terraform.tfstate 10/03 03:46 PM 12,052 terraform.tfstate.backup 10/02 10:50 AM 420 terraform.tfvars 10/02 12:58 PM 710 vars.tf 10/03 03:03 PM 1,318 vpc-subnets.tf — Samir Khan
– Samir Khan, Commented Oct 4, 2019 at 15:12

Dude0001 · Accepted Answer · 2019-10-03 19:17:17Z

2

I've used a template_file data and local_file resource for this.

data "template_file" "user_data" {
  template = "${file("iis.txt")}"
}

resource "local_file" "user_data" {
  content  = "${data.template_file.user_data.rendered}"
  filename = "user_data-${sha1(data.template_file.user_data.rendered)}.ps"
}

Then update your user_data property content of the local_file resource.

resource "aws_instance" "db1"
{
  ami           = "ami-1234567890"  
  instance_type = "t3.small"
  subnet_id     = "${aws_subnet.db.0.id}"
  key_name      = "ireland"
  user_data     = "${local_file.user_data.content}"
  tags =
  {
    Name = "sql node 1"
  }
}

This also allows you to get a little fancier and do a template script, and pull TF variables, etc into the template and render it just in time before you deploy.

edited Oct 3, 2019 at 19:17

answered Oct 3, 2019 at 19:10

Dude0001

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3 Comments

Dude0001 Over a year ago

Note if this doesn't work you may need to share some of the contents of your script file "iis.txt". There are requirements for how user_data is formatted for it to actually be executed as a script.

Samir Khan Over a year ago

IIS.txt <<-EOF <powershell> Install-WindowsFeature -name Web-Server -IncludemanagementTools </powershell> EOF @Dude0001 I will test your solution

Dude0001 Over a year ago

Is the heredoc/EOF stuff literal characters in the .txt? If so I think you need to take them out. The file should start with <poweshell> and end with <\powershell> docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/…

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