vpc-peer

vpc_peer.tf

#==============================================================
# Vpc.tf
#==============================================================

# Create a VPC Peering connection and setup routes on both sides


# Create a VPC peering connection

resource "aws_vpc_peering_connection" "admin_dblink_peer" {
  peer_vpc_id = "${aws_vpc.vpc.id}"
  vpc_id      = "${var.dblink_vpc_id}"

  requester {
    allow_remote_vpc_dns_resolution = true
  }

  accepter {
    allow_remote_vpc_dns_resolution = true
  }

  auto_accept = true

  tags {
    Name = "VPC Peer for DB Admin"
  }
}

#--------------------------------------------------------------
# Route our traffic to the DB VPC
#--------------------------------------------------------------

# Add a route to our subnet
resource "aws_route_table" "admin_subnet_route_table" {
  vpc_id = "${aws_vpc.vpc.id}"

  route {
    cidr_block = "0.0.0.0/0"
    gateway_id = "${aws_internet_gateway.admin_igw.id}"
  }

  route {
    cidr_block                = "${var.dblink_vpc_cidr_block}"
    vpc_peering_connection_id = "${aws_vpc_peering_connection.admin_dblink_peer.id}"
  }

  tags {
    Name        = "${var.stack_name}-admin-subnet-${var.environment}-${var.availability_zone}"
    owner       = "${var.owner}"
    stack_name  = "${var.stack_name}"
    environment = "${var.environment}"
    created_by  = "terraform"
  }
}

resource "aws_route_table_association" "admin_subnet_route_assoc" {
  subnet_id      = "${aws_subnet.admin.id}"
  route_table_id = "${aws_route_table.admin_subnet_route_table.id}"
}

# add the route to our vpc default route table
resource "aws_route" "admin_vpc_route" {
  route_table_id            = "${aws_vpc.vpc.default_route_table_id}"
  destination_cidr_block    = "${var.dblink_vpc_cidr_block}"
  vpc_peering_connection_id = "${aws_vpc_peering_connection.admin_dblink_peer.id}"
}