example_s3.tf

variable region {
  default = "us-west-1"
}

provider "aws" {
  alias = "east"
  region = "us-east-1"
}

resource "aws_s3_bucket" "config" {
  provider = "aws.east"
  bucket = "egencia_lab"
  acl = "private"
}

resource "aws_vpc" "vpc" {
  cidr_block = "10.0.0.0/16"
  tags {
    Name = "test-vpc"
    Environment = "test"
    Owner = "jewart"
  }
}

resource "aws_s3_keys" "infrastructure" {
    bucket = "egencia_lab"
    provider = "aws.east"

    # Read the launch AMI from S3
    key {
        name = "coreos_ami"
        path = "service/${var.region}/app/coreos_ami"
        default = "ami-27553a47"
    }

    key {
      name = "vpc_id"
      path = "infrastructure/${var.region}/vpc_id"
      value = "${aws_vpc.vpc.id}"
    }

    key {
      name = "app_subnet_id"
      path = "infrastructure/${var.region}/app_subnet_id"
      value = "${aws_subnet.testapp.id}"
    }

    key {
      name = "dmz_subnet_id"
      path = "infrastructure/${var.region}/dmz_subnet_id"
      value = "${aws_subnet.dmz.id}"
    }
}

resource "aws_subnet" "testapp" {
  vpc_id = "${aws_vpc.vpc.id}"
  cidr_block = "10.0.1.0/24"
  availability_zone = "us-west-1a"
  tags {
    Environment = "test"
  }
}

# Start our instance with the dynamic ami value
resource "aws_instance" "app" {
    ami = "${aws_s3_keys.app.var.coreos_ami}"
    instance_type = "t2.small"
    subnet_id = "${aws_s3_keys.infra.var.app_subnet}"
}