141 lines
4.9 KiB
HCL
141 lines
4.9 KiB
HCL
/**
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* Copyright 2021 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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locals {
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custom_rules = {
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for id, rule in var.custom_rules :
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id => merge(rule, {
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# make rules a map so we use it in a for_each
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rules = { for index, ports in rule.rules : index => ports }
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# lookup any named ranges references
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ranges = flatten([
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for range in rule.ranges :
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try(var.named_ranges[range], range)
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])
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})
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}
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}
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###############################################################################
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# rules based on IP ranges
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###############################################################################
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resource "google_compute_firewall" "allow-admins" {
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count = length(var.admin_ranges) > 0 ? 1 : 0
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name = "${var.network}-ingress-admins"
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description = "Access from the admin subnet to all subnets"
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network = var.network
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project = var.project_id
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source_ranges = var.admin_ranges
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allow { protocol = "all" }
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}
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###############################################################################
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# rules based on tags
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###############################################################################
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resource "google_compute_firewall" "allow-tag-ssh" {
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count = length(var.ssh_source_ranges) > 0 ? 1 : 0
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name = "${var.network}-ingress-tag-ssh"
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description = "Allow SSH to machines with the 'ssh' tag"
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network = var.network
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project = var.project_id
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source_ranges = var.ssh_source_ranges
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target_tags = ["ssh"]
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allow {
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protocol = "tcp"
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ports = ["22"]
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}
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}
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resource "google_compute_firewall" "allow-tag-http" {
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count = length(var.http_source_ranges) > 0 ? 1 : 0
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name = "${var.network}-ingress-tag-http"
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description = "Allow HTTP to machines with the 'http-server' tag"
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network = var.network
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project = var.project_id
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source_ranges = var.http_source_ranges
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target_tags = ["http-server"]
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allow {
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protocol = "tcp"
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ports = ["80"]
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}
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}
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resource "google_compute_firewall" "allow-tag-https" {
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count = length(var.https_source_ranges) > 0 ? 1 : 0
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name = "${var.network}-ingress-tag-https"
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description = "Allow HTTPS to machines with the 'https' tag"
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network = var.network
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project = var.project_id
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source_ranges = var.https_source_ranges
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target_tags = ["https-server"]
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allow {
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protocol = "tcp"
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ports = ["443"]
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}
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}
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################################################################################
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# dynamic rules #
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################################################################################
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resource "google_compute_firewall" "custom-rules" {
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# provider = "google-beta"
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for_each = local.custom_rules
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name = each.key
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description = each.value.description
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direction = each.value.direction
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network = var.network
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project = var.project_id
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source_ranges = each.value.direction == "INGRESS" ? each.value.ranges : null
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destination_ranges = each.value.direction == "EGRESS" ? each.value.ranges : null
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source_tags = each.value.use_service_accounts || each.value.direction == "EGRESS" ? null : each.value.sources
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source_service_accounts = each.value.use_service_accounts && each.value.direction == "INGRESS" ? each.value.sources : null
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target_tags = each.value.use_service_accounts ? null : each.value.targets
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target_service_accounts = each.value.use_service_accounts ? each.value.targets : null
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disabled = lookup(each.value.extra_attributes, "disabled", false)
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priority = lookup(each.value.extra_attributes, "priority", 1000)
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dynamic "log_config" {
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for_each = lookup(each.value.extra_attributes, "logging", null) != null ? [each.value.extra_attributes.logging] : []
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iterator = logging_config
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content {
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metadata = logging_config.value
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}
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}
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dynamic "deny" {
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for_each = each.value.action == "deny" ? each.value.rules : {}
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iterator = rule
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content {
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protocol = rule.value.protocol
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ports = rule.value.ports
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}
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}
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dynamic "allow" {
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for_each = each.value.action == "allow" ? each.value.rules : {}
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iterator = rule
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content {
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protocol = rule.value.protocol
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ports = rule.value.ports
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}
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}
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}
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