121 lines
2.8 KiB
HCL
121 lines
2.8 KiB
HCL
/* The VPN allows us to limit certain traffic to just local network */
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resource "aws_vpc" "main" {
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cidr_block = var.vpc_cidr_block
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instance_tenancy = "default"
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enable_dns_support = true
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enable_dns_hostnames = true
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tags = {
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Name = "vpc-${var.name}-${var.stage}"
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}
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}
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/* A VPN can't exist by itself, a subnet is necessary to add instances */
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resource "aws_subnet" "main" {
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vpc_id = aws_vpc.main.id
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cidr_block = var.subnet_cidr_block
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/* Needs to be the same as the instances zone */
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availability_zone = var.zone
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/* Necessary for instances available publicly */
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map_public_ip_on_launch = true
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tags = {
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Name = "sn-${var.name}-${var.stage}"
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}
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}
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/* Necessary for internet access */
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resource "aws_internet_gateway" "main" {
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vpc_id = aws_vpc.main.id
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tags = {
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Name = "ig-${var.name}-${var.stage}"
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}
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}
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/* Adds rule for accessing internet via the Gateway */
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resource "aws_route_table" "main" {
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vpc_id = aws_vpc.main.id
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/* Allow internet traffic in */
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route {
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cidr_block = "0.0.0.0/0"
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gateway_id = aws_internet_gateway.main.id
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}
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tags = {
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Name = "rt-${var.name}-${var.stage}"
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}
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}
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/* Add the route to Gateway to the Subnet */
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resource "aws_route_table_association" "main" {
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subnet_id = aws_subnet.main.id
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route_table_id = aws_route_table.main.id
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}
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/* Open the necessary ports to the outside */
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resource "aws_security_group" "main" {
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name = "${var.name}-${var.stage}"
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description = "Allow inbound traffic for Nimbus fleet"
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vpc_id = aws_vpc.main.id
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/* Allow local incoming traffic, necessary for logging */
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ingress {
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from_port = 0
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to_port = 0
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self = true
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protocol = "-1"
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}
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/* Allowing ALL outgoing */
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egress {
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from_port = 0
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to_port = 0
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protocol = "-1"
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cidr_blocks = ["0.0.0.0/0"]
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}
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/* TCP */
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dynamic "ingress" {
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iterator = port
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for_each = var.open_tcp_ports
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content {
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/* Hacky way to handle ranges as strings */
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from_port = tonumber(
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length(split("-", port.value)) > 1 ? split("-", port.value)[0] : port.value
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)
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to_port = tonumber(
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length(split("-", port.value)) > 1 ? split("-", port.value)[1] : port.value
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)
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protocol = "tcp"
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cidr_blocks = ["0.0.0.0/0"]
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}
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}
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/* UDP */
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dynamic "ingress" {
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iterator = port
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for_each = var.open_udp_ports
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content {
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/* Hacky way to handle ranges as strings */
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from_port = tonumber(
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length(split("-", port.value)) > 1 ? split("-", port.value)[0] : port.value
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)
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to_port = tonumber(
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length(split("-", port.value)) > 1 ? split("-", port.value)[1] : port.value
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)
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protocol = "udp"
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cidr_blocks = ["0.0.0.0/0"]
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}
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}
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/* Without this aws_route_table is not created in time */
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depends_on = [
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aws_route_table_association.main
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]
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}
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