eventarc-workflows

Terraform with Eventarc and Workflows

This sample shows how to use Terraform's eventarc_trigger and google_workflows_workflow to deploy a workflow and create an Eventarc trigger to invoke it with a Pub/Sub event.

Terraform

You can see main.tf for Terraform and [workflow.yaml](workflow.yaml] for Workflows definitions.

1. Initialize terraform:

   terraform init

2. See the planned changes:

   terraform plan -var="project_id=YOUR-PROJECT-ID" -var="region=YOUR-GCP-REGION"

3. Apply changes:

   terraform apply -var="project_id=YOUR-PROJECT-ID" -var="region=YOUR-GCP-REGION"

4. You can see the created workflow in the list:

   gcloud workflows list --location YOUR-GCP-REGION

5. You can also see the created trigger:

   gcloud eventarc triggers list --location YOUR-GCP-REGION

6. Cleanup:

   terraform destroy -var="project_id=YOUR-PROJECT-ID" -var="region=YOUR-GCP-REGION"

Execute

You can execute the workflow using gcloud:

1. Find the topic of the trigger and send a message:

   TOPIC_ID=$(gcloud eventarc triggers describe trigger-pubsub-workflow-tf --location=YOUR-GCP-REGION --format='value(transport.pubsub.topic)')
   gcloud pubsub topics publish $TOPIC_ID --message="Hello World"

2. After sending the message, you can check Workflows output and logs to see the received Hello World message.