feat: add n8n

modules/20-services-apps/n8n/.env.example

@@ -0,0 +1,10 @@
+POSTGRES_USER=admin
+POSTGRES_PASSWORD=
+POSTGRES_DB=n8n
+POSTGRES_NON_ROOT_USER=
+POSTGRES_NON_ROOT_PASSWORD=
+N8N_HOST=localhost
+N8N_PORT=5678
+N8N_PROTOCOL=http
+WEBHOOK_URL=https://n8n.yourdomain.com/
+NODE_FUNCTION_ALLOW_EXTERNAL=*

modules/20-services-apps/n8n/init-data.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+set -e;
+
+
+if [ -n "${POSTGRES_NON_ROOT_USER:-}" ] && [ -n "${POSTGRES_NON_ROOT_PASSWORD:-}" ]; then
+        psql -v ON_ERROR_STOP=1 --username "$POSTGRES_USER" --dbname "$POSTGRES_DB" <<-EOSQL
+                CREATE USER ${POSTGRES_NON_ROOT_USER} WITH PASSWORD '${POSTGRES_NON_ROOT_PASSWORD}';
+                GRANT ALL PRIVILEGES ON DATABASE ${POSTGRES_DB} TO ${POSTGRES_NON_ROOT_USER};
+                GRANT CREATE ON SCHEMA public TO ${POSTGRES_NON_ROOT_USER};
+        EOSQL
+else
+        echo "SETUP INFO: No Environment variables given!"
+fi

modules/20-services-apps/n8n/main.tf

@@ -0,0 +1,127 @@
+terraform {
+  required_providers {
+    dotenv = {
+      source = "germanbrew/dotenv"
+    }
+  }
+}
+
+variable "image_tag" {
+  description = "The tag for the n8n container image"
+  type        = string
+  default     = "latest"
+}
+
+variable "volume_path" {
+  description = "Base directory for volumes"
+  type        = string
+}
+
+variable "networks" {
+  description = "List of networks to which the container should be attached"
+  type        = list(string)
+  default     = []
+}
+
+locals {
+  container_name  = "n8n"
+  database_name   = "n8n-postgres"
+  n8n_image       = "docker.n8n.io/n8nio/n8n"
+  database_image  = "postgres"
+  n8n_tag         = var.image_tag != "" ? var.image_tag : "latest"
+  database_tag    = "16"
+  monitoring      = true
+  env_file        = "${path.module}/.env"
+  n8n_internal_port = 5678
+  
+  # Define volumes
+  n8n_volumes = [
+    {
+      host_path      = "${var.volume_path}/n8n_storage/_data"
+      container_path = "/home/node/.n8n"
+      read_only      = false
+    }
+  ]
+  
+  database_volumes = [
+    {
+      host_path      = "${var.volume_path}/db_storage/_data"
+      container_path = "/var/lib/postgresql/data"
+      read_only      = false
+    },
+    {
+      host_path      = "${var.volume_path}/init-data.sh"
+      container_path = "/docker-entrypoint-initdb.d/init-data.sh"
+      read_only      = false
+    }
+  ]
+  
+  # Environment variables for the database
+  database_env_vars = {
+    POSTGRES_USER            = provider::dotenv::get_by_key("POSTGRES_USER", local.env_file)
+    POSTGRES_PASSWORD        = provider::dotenv::get_by_key("POSTGRES_PASSWORD", local.env_file)
+    POSTGRES_DB              = provider::dotenv::get_by_key("POSTGRES_DB", local.env_file)
+    POSTGRES_NON_ROOT_USER   = provider::dotenv::get_by_key("POSTGRES_NON_ROOT_USER", local.env_file)
+    POSTGRES_NON_ROOT_PASSWORD = provider::dotenv::get_by_key("POSTGRES_NON_ROOT_PASSWORD", local.env_file)
+  }
+  
+  # Environment variables for n8n
+  n8n_env_vars = {
+    DB_TYPE                       = "postgresdb"
+    DB_POSTGRESDB_HOST            = local.database_name
+    DB_POSTGRESDB_PORT            = 5432
+    DB_POSTGRESDB_DATABASE        = provider::dotenv::get_by_key("POSTGRES_DB", local.env_file)
+    DB_POSTGRESDB_USER            = provider::dotenv::get_by_key("POSTGRES_NON_ROOT_USER", local.env_file)
+    DB_POSTGRESDB_PASSWORD        = provider::dotenv::get_by_key("POSTGRES_NON_ROOT_PASSWORD", local.env_file)
+    N8N_HOST                      = provider::dotenv::get_by_key("N8N_HOST", local.env_file)
+    N8N_PORT                      = provider::dotenv::get_by_key("N8N_PORT", local.env_file)
+    N8N_PROTOCOL                  = provider::dotenv::get_by_key("N8N_PROTOCOL", local.env_file)
+    WEBHOOK_URL                   = provider::dotenv::get_by_key("WEBHOOK_URL", local.env_file)
+    NODE_FUNCTION_ALLOW_EXTERNAL  = provider::dotenv::get_by_key("NODE_FUNCTION_ALLOW_EXTERNAL", local.env_file)
+  }
+
+  # Healthcheck configuration for the database
+  database_healthcheck = {
+    test         = ["CMD-SHELL", "pg_isready -h localhost -U $${POSTGRES_USER} -d $${POSTGRES_DB}"]
+    interval     = "5s"
+    timeout      = "5s"
+    retries      = 10
+    start_period = "10s"
+  }
+}
+
+# Create the PostgreSQL container
+module "postgres" {
+  source         = "../../10-services-generic/docker-service"
+  container_name = local.database_name
+  image          = local.database_image
+  tag            = local.database_tag
+  volumes        = local.database_volumes
+  env_vars       = local.database_env_vars
+  networks       = var.networks
+  monitoring     = local.monitoring
+  healthcheck    = local.database_healthcheck
+}
+
+# Create the n8n container
+module "n8n" {
+  source         = "../../10-services-generic/docker-service"
+  container_name = local.container_name
+  image          = local.n8n_image
+  tag            = local.n8n_tag
+  volumes        = local.n8n_volumes
+  env_vars       = local.n8n_env_vars
+  networks       = var.networks
+  monitoring     = local.monitoring
+  depends_on     = [module.postgres]
+}
+
+output "service_definition" {
+  description = "General service definition with optional ingress configuration"
+  value = {
+    name         = local.container_name
+    primary_port = local.n8n_internal_port
+    endpoint     = "http://${local.container_name}:${local.n8n_internal_port}"
+    subdomains   = ["n8n"]
+  }
+}

services/main.tf

@@ -52,3 +52,9 @@ module "pterodactyl_wings" {
   volume_path = "${local.volume_host}/pterodactyl/wings"
   networks    = [module.homelab_docker_network.name]
 }
+
+module "n8n" {
+  source      = "${local.module_dir}/20-services-apps/n8n"
+  volume_path = "${local.volume_host}/n8n"
+  networks    = [module.homelab_docker_network.name]
+}

services/outputs.tf

@@ -9,7 +9,8 @@ output "service_definitions" {
     module.linkwarden.service_definition,
     module.ntfy.service_definition,
     module.pterodactyl_wings.service_definition,
-    module.pterodactyl_panel.service_definition
+    module.pterodactyl_panel.service_definition,
+    module.n8n.service_definition
   ]
 }