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main.tf
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main.tf
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# ----- Terraform Setup -----
provider "google" {
project = var.project
region = var.region
zone = var.zone
}
terraform {
required_providers {
google = {
source = "hashicorp/google"
version = "5.14.0"
}
}
}
# ---------------------------------
# ----- Network Configuration -----
module "paddy_nw" {
source = "./gcp-cloud-network"
name = "paddy-network"
allowed_internal_communication_ports = [
"80", # HTTP
"2379", # ETCD
"8083-8084", # EMQX WS
"4370-4380", "5369-5379", # EMQX Clustering
"7687" # Bolt (neo4j)
]
allowed_internal_communication_ports_block = ["10.172.0.0/20"] # Internal region block
allowed_ports_tcp_anyip = ["22", "443", "8883"] # Incoming ports from IGW
}
module "paddy_internal_dns" {
source = "./gcp-cloud-internal-dns"
name = "paddy"
domain_name = "paddy.internal"
network = module.paddy_nw.self_link
dns_records = {
"10.172.0.2" = "auth"
"10.172.0.3" = "neo4j"
"10.172.0.4" = "etcd"
"10.172.0.5" = "scheduler"
# VMs created by clusters
# "10.172.0.5"
# "10.172.0.6"
# ...
"10.172.1.2" = "broker-cluster"
"10.172.2.2" = "backend-cluster"
}
}
module "paddy_certs" {
source = "./gcp-cloud-certs"
name = "paddy"
ssl_certificate_domain = "mqtt.danielstefani.online"
private_key = var.private_key
private_certificate = var.private_certificate
}
resource "google_compute_global_address" "static-global-ip" {
name = "paddy-external-ip-address"
}
# ---------------------------------
# ----- Single Instances -----
module "paddy_auth_single_instance" {
source = "./gcp-cloud-vm"
name = "auth"
internal_ip = "10.172.0.2"
zone = "europe-west6-b"
instance_type = "f1-micro"
network_name = module.paddy_nw.network_name
startup_script = file("${path.module}/vm-startup-scripts/auth-startup-script.sh")
backend_mqtt_host = var.backend_mqtt_host
backend_mqtt_port = var.backend_mqtt_port
backend_mqtt_device_read_topic = var.backend_mqtt_device_read_topic
backend_mqtt_authentication_key = var.backend_mqtt_authentication_key
}
module "db_neo4j_single_instance" {
source = "./gcp-cloud-vm"
name = "neo4j"
internal_ip = "10.172.0.3"
zone = var.zone
instance_type = "e2-small"
disk_size = 100 # Gigabytes
network_name = module.paddy_nw.network_name
startup_script = file("${path.module}/vm-startup-scripts/db-neo4j-startup-script.sh")
}
module "etcd_single_instance" {
source = "./gcp-cloud-vm"
name = "etcd"
internal_ip = "10.172.0.4"
zone = var.zone
instance_type = "f1-micro"
network_name = module.paddy_nw.network_name
startup_script = file("${path.module}/vm-startup-scripts/etcd-startup-script.sh")
}
module "paddy_scheduler_single_instance" {
source = "./gcp-cloud-vm"
name = "scheduler"
internal_ip = "10.172.0.5"
zone = "europe-west6-c"
instance_type = "f1-micro"
network_name = module.paddy_nw.network_name
startup_script = file("${path.module}/vm-startup-scripts/scheduler-startup-script.sh")
backend_mqtt_host = var.backend_mqtt_host
backend_mqtt_port = var.backend_mqtt_port
backend_mqtt_device_read_topic = var.backend_mqtt_device_read_topic
backend_mqtt_scheduler_events = var.backend_mqtt_scheduler_events
backend_db_uri = var.backend_db_uri
backend_db_user = var.backend_db_user
backend_db_password = var.backend_db_password
backend_auth_service_url = var.backend_auth_service_url
}
# ------------------------------
# ----- Cluster Templates -----
module "paddy_broker_instance_template" {
source = "./gcp-cloud-vm-template"
name = "paddy-broker"
network_name = module.paddy_nw.network_name
instance_type = "f1-micro"
startup_script = file("${path.module}/vm-startup-scripts/broker-startup-script.sh")
}
module "paddy_backend_instance_template" {
source = "./gcp-cloud-vm-template"
name = "paddy-backend"
network_name = module.paddy_nw.network_name
instance_type = "f1-micro"
backend_mqtt_host = var.backend_mqtt_host
backend_mqtt_port = var.backend_mqtt_port
backend_mqtt_subscriptions = var.backend_mqtt_subscriptions
backend_mqtt_device_read_topic = var.backend_mqtt_device_read_topic
backend_mqtt_scheduler_events = var.backend_mqtt_scheduler_events
backend_auth_service_url = var.backend_auth_service_url
backend_db_uri = var.backend_db_uri
backend_db_user = var.backend_db_user
backend_db_password = var.backend_db_password
startup_script = file("${path.module}/vm-startup-scripts/backend-startup-script.sh")
}
# ------------------------------
# ----- Clusters -----
module "broker_global_lb_cluster" {
source = "./gcp-cloud-global-lb-cluster"
name = "broker-cluster"
zone = var.zone
region = var.region
network = module.paddy_nw.self_link
static_external_ip = google_compute_global_address.static-global-ip.self_link
static_internal_ip = "10.172.1.2"
tcp_target_ports = { "mqtts" = 8883 }
health_check_port = 8883
instance_template = module.paddy_broker_instance_template.self_link
ssl_certificates = [module.paddy_certs.self_ssl_cert]
replicas = 1
}
module "backend_global_lb_cluster" {
source = "./gcp-cloud-global-lb-cluster"
name = "backend-cluster"
zone = var.zone
region = var.region
network = module.paddy_nw.self_link
static_external_ip = google_compute_global_address.static-global-ip.self_link
static_internal_ip = "10.172.2.2"
tcp_target_ports = { "https" = 443 }
health_check_port = 443
instance_template = module.paddy_backend_instance_template.self_link
ssl_certificates = [module.paddy_certs.managed_ssl_cert]
replicas = 1
}
# --------------------