terraform/modules/pubsubnet/main.tf

# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

data "aws_region" "current" {
}

resource "aws_subnet" "pubsubnet" {
  availability_zone       = "${data.aws_region.current.name}${var.availability_zone}"
  cidr_block              = var.cidr_block
  map_public_ip_on_launch = false
  vpc_id                  = var.vpc_id

  tags = {
    Name = "Public subnet ${var.availability_zone}"
  }
}

resource "aws_eip" "nat-eip" {
  vpc = true

  tags = {
    Name = "NAT gateway ${var.availability_zone} elastic IP"
  }
}

resource "aws_nat_gateway" "nat" {
  allocation_id = aws_eip.nat-eip.id
  subnet_id     = aws_subnet.pubsubnet.id

  tags = {
    Name = "NAT gateway ${var.availability_zone}"
  }
}

resource "aws_route_table_association" "pubroute" {
  route_table_id = var.route_table_id
  subnet_id      = aws_subnet.pubsubnet.id
}