Example template rendering

resource "template_file" "app" {
  	template = "${file("${path.module}/init.sh")}"

    vars {
        TERRAFORM_db_host = "${var.rds_master}"
        TERRAFORM_db_user = "dfgdfg"
        TERRAFORM_db_pass = "dfgdfg"
        TERRAFORM_db      = "sdfsdfsd"
    }
}

resource "aws_launch_configuration" "app" {
    name_prefix             = "app_${var.env}_launchconfig"
    image_id                = "${var.ami}"
    instance_type           = "${var.instance_type}"
    key_name                = "${var.key_name}"
    security_groups         = ["${aws_security_group.vpc.id}","${aws_security_group.ssh.id}"]
    user_data               = "${template_file.app.rendered}"
    iam_instance_profile    = "${aws_iam_instance_profile.app_profile.name}"
}