Add NATS trigger to container example

containers/terraform-triggers/README.md

@@ -31,9 +31,9 @@ The deployment will do the following:
 1. Create a Scaleway registry namespace
 2. Build and deploy a container image with a Python/Go HTTP server
 3. Deploy a public and private Serverless Container using the built image
-4. Create Scaleway MnQ SQS queues
-5. Configure triggers from these queues to each container
-6. Print the endpoints of each queue and each container
+4. Create Scaleway MnQ SQS queues and NATS subjects
+5. Configure triggers from these SQS queues and NATS subjects to each container
+6. Print the endpoints of each SQS queue, NATS subject and container
 
 To run the deployment:
 
@@ -45,7 +45,7 @@ terraform apply
 
 ## Running
 
-You can test your triggers by sending messages to the SQS queues configured with Terraform.
+You can test your triggers by sending messages to the SQS queues and NATS subjects configured with Terraform.
 
 Below there is an example showing how to do this using a Python script in the [`tests/`](tests/) folder of this repo.
 
@@ -58,6 +58,9 @@ export AWS_ACCESS_KEY_ID=$(terraform output -raw sqs_admin_access_key)
 export AWS_SECRET_ACCESS_KEY=$(terraform output -raw sqs_admin_secret_key)
 export PUBLIC_QUEUE_URL=$(terraform output -raw public_queue)
 export PRIVATE_QUEUE_URL=$(terraform output -raw private_queue)
+export PUBLIC_SUBJECT=$(terraform output -raw public_subject)
+export PRIVATE_SUBJECT=$(terraform output -raw private_subject)
+export NATS_CREDS_FILE=$(terraform output -raw nats_creds_file)
 ```
 
 You can then set up a Python environment in the `tests` directory:

containers/terraform-triggers/mnq_nats.tf

@@ -0,0 +1,13 @@
+resource "scaleway_mnq_nats_account" "main" {
+  name = "nats-account"
+}
+
+resource "scaleway_mnq_nats_credentials" "main" {
+  account_id = scaleway_mnq_nats_account.main.id
+  name       = "triggers-nats"
+}
+
+resource "local_sensitive_file" "nats" {
+  filename = "nats-creds"
+  content = "${scaleway_mnq_nats_credentials.main.file}"
+}

containers/terraform-triggers/outputs.tf

@@ -24,6 +24,18 @@ output "sqs_admin_secret_key" {
   sensitive = true
 }
 
+output "public_subject" {
+  value = local.public_nats_subject
+}
+
+output "private_subject" {
+  value = local.private_nats_subject
+}
+
+output "nats_creds_file" {
+  value = local_sensitive_file.nats.filename
+}
+
 output "cockpit_logs_public_container" {
   value = "https://${var.project_id}.dashboard.obs.fr-par.scw.cloud/d/scw-serverless-containers-logs/serverless-containers-logs?orgId=1&var-container_name=${split(".", scaleway_container.public.domain_name)[0]}&var-logs=Scaleway%20Logs"
 }

containers/terraform-triggers/tests/requirements.txt

@@ -1 +1,2 @@
 boto3==1.28.67
+nats-py==2.6.0

containers/terraform-triggers/tests/send_messages.py

@@ -1,12 +1,18 @@
 import os
 
 import boto3
+import nats
 
 AWS_ACCESS_KEY_ID = os.environ["AWS_ACCESS_KEY_ID"]
 AWS_SECRET_ACCESS_KEY = os.environ["AWS_SECRET_ACCESS_KEY"]
 PUBLIC_QUEUE_URL = os.environ["PUBLIC_QUEUE_URL"]
 PRIVATE_QUEUE_URL = os.environ["PRIVATE_QUEUE_URL"]
 
+NATS_ENDPOINT_URL = "https://nats.mnq.fr-par.scaleway.com"
+PUBLIC_SUBJECT = os.environ["PUBLIC_SUBJECT"]
+PRIVATE_SUBJECT = os.environ["PRIVATE_SUBJECT"]
+NATS_CREDS_FILE = os.environ["NATS_CREDS_FILE"]
+
 params = {
     "endpoint_url": "https://sqs.mnq.fr-par.scaleway.com",
     "aws_access_key_id": AWS_ACCESS_KEY_ID,
@@ -17,13 +23,20 @@
 client = boto3.client("sqs", **params)
 sqs = boto3.resource("sqs", **params)
 
+nc = nats.connect(NATS_ENDPOINT_URL, user_credentials=NATS_CREDS_FILE)
+
+
 def main():
     for queue_url in (PUBLIC_QUEUE_URL, PRIVATE_QUEUE_URL):
         queue = sqs.Queue(queue_url)
         queue_name = queue.attributes["QueueArn"].split(":")[-1]
-        print(f"Sending greetings message to {queue_name}...")
-        queue.send_message(MessageBody="Hello World!")
+        print(f"Sending greetings message to SQS {queue_name}...")
+        queue.send_message(MessageBody="Hello World SQS!")
         print("Greetings sent!")
 
+    for subject in (PUBLIC_SUBJECT, PRIVATE_SUBJECT):
+        nc.publish(subject, b"Hello World NATS!")
+
+
 if __name__ == "__main__":
     main()

containers/terraform-triggers/triggers.tf

@@ -1,15 +1,38 @@
-resource "scaleway_container_trigger" "public" {
+resource "scaleway_container_trigger" "public_sqs" {
   container_id = scaleway_container.public.id
-  name         = "public-trigger"
+  name         = "public-sqs-trigger"
   sqs {
     queue = scaleway_mnq_sqs_queue.public.name
   }
 }
 
-resource "scaleway_container_trigger" "private" {
+resource "scaleway_container_trigger" "private_sqs" {
   container_id = scaleway_container.private.id
-  name         = "private-trigger"
+  name         = "private-sqs-trigger"
   sqs {
     queue = scaleway_mnq_sqs_queue.private.name
   }
 }
+
+locals {
+  public_nats_subject = "public-nats-subject"
+  private_nats_subject = "private-nats-subject"
+}
+
+resource "scaleway_container_trigger" "public_nats" {
+  container_id = scaleway_container.public.id
+  name         = "public-nats-trigger"
+  nats {
+    account_id = scaleway_mnq_nats_account.main.id
+    subject = local.public_nats_subject
+  }
+}
+
+resource "scaleway_container_trigger" "private_nats" {
+  container_id = scaleway_container.private.id
+  name         = "private-nats-trigger"
+  nats {
+    account_id = scaleway_mnq_nats_account.main.id
+    subject = local.private_nats_subject
+  }
+}