Connect a Pub/Sub subscription to a Cloud Run services

data "google_project" "project" {
}

# Enable Cloud Run API
resource "google_project_service" "cloudrun_api" {
  service            = "run.googleapis.com"
  disable_on_destroy = false
}

resource "google_cloud_run_v2_service" "default" {
  name     = "pubsub-tutorial"
  location = "us-central1"

  deletion_protection = false # set to true to prevent destruction of the resource

  template {
    containers {
      image = "us-docker.pkg.dev/cloudrun/container/hello" # Replace with newly created image gcr.io/<project_id>/pubsub
    }
  }
  depends_on = [google_project_service.cloudrun_api]
}

resource "google_service_account" "sa" {
  account_id   = "cloud-run-pubsub-invoker"
  display_name = "Cloud Run Pub/Sub Invoker"
}

resource "google_cloud_run_service_iam_binding" "binding" {
  location = google_cloud_run_v2_service.default.location
  service  = google_cloud_run_v2_service.default.name
  role     = "roles/run.invoker"
  members  = ["serviceAccount:${google_service_account.sa.email}"]
}

resource "google_project_service_identity" "pubsub_agent" {
  provider = google-beta
  project  = data.google_project.project.project_id
  service  = "pubsub.googleapis.com"
}

resource "google_project_iam_binding" "project_token_creator" {
  project = data.google_project.project.project_id
  role    = "roles/iam.serviceAccountTokenCreator"
  members = ["serviceAccount:${google_project_service_identity.pubsub_agent.email}"]
}

resource "google_pubsub_topic" "default" {
  name = "pubsub_topic"
}

resource "google_pubsub_subscription" "subscription" {
  name  = "pubsub_subscription"
  topic = google_pubsub_topic.default.name
  push_config {
    push_endpoint = google_cloud_run_v2_service.default.uri
    oidc_token {
      service_account_email = google_service_account.sa.email
    }
    attributes = {
      x-goog-version = "v1"
    }
  }
  depends_on = [google_cloud_run_v2_service.default]
}