Add support for a second function to log directly to bigquery.

terraform/basic_gke/main.tf

@@ -207,16 +207,43 @@ module "cf_to_pubsub" {
   source               = "../modules/cf_to_pubsub"
   project              = var.project
   region               = var.region
-  topic_name         = "bigquery-etl"
+  function_name        = "cf-to-pubsub"
+  function_description = "CloudFunction to PubSub"
+  function_source_name = "cf_to_pubsub"
   source_bucket        = google_storage_bucket.bucket
   service_cloudbuild   = google_project_service.cloudbuild
+
+  environment_variables = {
+    GCP_PROJECT = var.project
+    GCP_TOPIC   = "bigquery-etl"
+  }
 }
 
-output "log_to_bq_endpoint" {
-  description = "https endpoint to log to BigQuery."
+output "cf_to_pubsub_endpoint" {
+  description = "https endpoint to log to BigQuery through pubsub."
   value       = module.cf_to_pubsub.https_trigger_url
 }
 
+module "cf_to_bq" {
+  source               = "../modules/cf_to_pubsub"
+  project              = var.project
+  region               = var.region
+  function_name        = "cf-to-bq"
+  function_description = "CloudFunction to BigQuery"
+  function_source_name = "cf_to_bq"
+  source_bucket        = google_storage_bucket.bucket
+  service_cloudbuild   = google_project_service.cloudbuild
+
+  environment_variables = {
+    BQ_TABLE = "${var.project}.pubsub_etl.pubsub_etl"
+  }
+}
+
+output "cf_to_bq_endpoint" {
+  description = "https endpoint to log to BigQuery directly."
+  value       = module.cf_to_bq.https_trigger_url
+}
+
 #################### PubSub to BigQuery ###################
 
 module "bigquery" {

terraform/modules/cf_to_pubsub/cf_to_pubsub.tf

@@ -11,9 +11,22 @@ variable "region" {
   type        = string
 }
 
-variable "topic_name" {
-  description = "The name of topic where the events should be published."
+variable "function_name" {
+  description = "Name for the cloud function. If unspecified, one will be generated."
   type        = string
+  default     = ""
+}
+
+variable "function_description" {
+  description = "Description for the cloud function."
+  type        = string
+  default     = ""
+}
+
+variable "environment_variables" {
+  description = "Environment variables for the execution of the cloud function."
+  type        = map(any)
+  default     = {}
 }
 
 variable "source_bucket" {
@@ -23,11 +36,16 @@ variable "source_bucket" {
 variable "function_source_name" {
   description = "Name of the folder containing the source code for the function."
   type        = string
-  default     = "cf_to_pubsub"
 }
 
 variable "service_cloudbuild" {
-  description = "THe cloudbuild google_project_service."
+  description = "The cloudbuild google_project_service."
+}
+
+variable "allow_external" {
+  description = "Whether or not to allow outside traffic ingress."
+  type        = bool
+  default     = true
 }
 
 output "https_trigger_url" {
@@ -35,6 +53,14 @@ output "https_trigger_url" {
   value       = google_cloudfunctions_function.function.https_trigger_url
 }
 
+locals {
+  function_name = var.function_name == "" ? "cf-${random_id.function_id.hex}" : var.function_name
+}
+
+resource "random_id" "function_id" {
+  byte_length = 4
+}
+
 resource "random_id" "cf_bucket_id" {
   byte_length = 4
 }
@@ -53,8 +79,8 @@ resource "google_storage_bucket_object" "remote_archive" {
 }
 
 resource "google_cloudfunctions_function" "function" {
-  name        = "cf-to-pubsub"
-  description = "CloudFunction to PubSub"
+  name        = local.function_name
+  description = var.function_description
   runtime     = "python39"
 
   available_memory_mb   = 128
@@ -63,13 +89,9 @@ resource "google_cloudfunctions_function" "function" {
   trigger_http          = true
   entry_point           = "main"
   max_instances         = 4
-  ingress_settings      = "ALLOW_ALL"
-  # ingress_settings      = "ALLOW_INTERNAL_ONLY"
+  ingress_settings      = var.allow_external ? "ALLOW_ALL" : "ALLOW_INTERNAL_ONLY"
 
-  environment_variables = {
-    GCP_PROJECT = var.project
-    GCP_TOPIC   = var.topic_name
-  }
+  environment_variables = var.environment_variables
 
   depends_on = [
     var.service_cloudbuild

terraform/modules/cf_to_pubsub/functions/cf_to_bq/main.py

@@ -0,0 +1,25 @@
+import json
+import os
+
+from google.cloud import bigquery
+
+client = bigquery.Client()
+
+
+def push_to_pubsub(request_params):
+    errors = client.insert_rows_json(os.environ["BQ_TABLE"], [request_params])
+    if errors != []:
+        raise Exception("Encountered errors while inserting rows: {}".format(errors))
+
+
+def main(request):
+    request_json = request.get_json(silent=True)
+    request_args = request.args
+
+    if request_json:
+        push_to_pubsub(request_json)
+    elif request_args:
+        push_to_pubsub(request_args)
+    else:
+        return ("No data provided.", 400)
+    return {"status": "ok", "source": "cf_to_bq"}

terraform/modules/cf_to_pubsub/functions/cf_to_bq/requirements.txt

@@ -0,0 +1,2 @@
+Flask==1.1.2
+google-cloud-bigquery==2.22.0

terraform/modules/cf_to_pubsub/functions/cf_to_pubsub/main.py

@@ -4,7 +4,7 @@ import os
 from google.cloud import pubsub_v1
 
 publisher = pubsub_v1.PublisherClient()
-topic = publisher.topic_path(os.environ.get("GCP_PROJECT"), os.environ.get("GCP_TOPIC"))
+topic = publisher.topic_path(os.environ["GCP_PROJECT"], os.environ["GCP_TOPIC"])
 
 
 def push_to_pubsub(request_params):
@@ -20,5 +20,5 @@ def main(request):
     elif request_args:
         push_to_pubsub(request_args)
     else:
-        raise Exception("No data provided.")
-    return {"status": "ok"}
+        return ("No data provided.", 400)
+    return {"status": "ok", "source": "cf_to_pubsub"}