resource "aws_iam_role" "app_role" {
  name = "app_role"
  path = "/"

  assume_role_policy = <<EOF
{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Action": "sts:AssumeRole",
            "Principal": {
                "Service": "ec2.amazonaws.com"
            },
            "Effect": "Allow",
            "Sid": ""
        }
    ]
}
EOF
}

data "aws_iam_policy" "app_policy_document" {
  statement {
    actions   = ["sts:AssumeRole"]
    resources = ["*"]
  }

  statement {
    actions   = ["ec2:DescribeInstances"]
    resources = ["*"]
  }

  statement {
    actions   = ["s3:*"]
    resources = ["*"]
  }
}

resource "aws_iam_policy" "app_policy" {
  name   = "app_policy"
  path   = "/"
  policy = "${data.aws_iam_policy_document.app_policy_document.json}"
}

resource "aws_iam_role_policy_attachment" "app_policy_attachment" {
  role       = "${aws_iam_role.app_role.name}"
  policy_arn = "${aws_iam_policy.app_policy.arn}"
}

resource "aws_iam_instance_profile" "app_profile" {
  name = "app_profile"
  role = "${aws_iam_role.app_role.name}"
}