tf/gae/gae.tf

# Copyright 2022 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

# Not enabling the permissions on the default service account here 
# Since the permissions bindings specified here will be removed when the 
# terraform cleanup happens, that causes failures in app engine flex 
# environment. These permissions should be granted through the latch-key configurations.

resource "google_app_engine_flexible_app_version" "test_service" {
  version_id = "v1"
  project    = var.project_id
  service    = "flex-${var.runtime}-${terraform.workspace}"
  runtime    = "custom"

  deployment {
    container {
      image = var.image
    }
  }

  liveness_check {
    path = "/alive"
  }

  readiness_check {
    path = "/ready"
  }

  // Limit resources and QPS
  automatic_scaling {
    max_concurrent_requests = 5
    cpu_utilization {
      target_utilization = 0.9
    }
    max_total_instances = 1
    min_total_instances = 0
  }

  env_variables = {
    "PUSH_PORT"                 = "8080",
    "REQUEST_SUBSCRIPTION_NAME" = module.pubsub.info.request_topic.subscription_name,
    "RESPONSE_TOPIC_NAME"       = module.pubsub.info.response_topic.topic_name,
    "PROJECT_ID"                = var.project_id,
    "SUBSCRIPTION_MODE"         = "push"
  }

  noop_on_destroy           = false
  delete_service_on_destroy = true
  service_account           = "${var.project_id}@appspot.gserviceaccount.com"
}

module "pubsub" {
  source = "../modules/pubsub"

  project_id = var.project_id
}

module "pubsub-push-subscription" {
  source = "../modules/pubsub-push-subscription"

  project_id    = var.project_id
  topic         = module.pubsub.info.request_topic.topic_name
  push_endpoint = "https://${google_app_engine_flexible_app_version.test_service.service}-dot-${var.project_id}.uc.r.appspot.com/"
}

variable "image" {
  type = string
}

variable "runtime" {
  type = string
}

output "pubsub_info" {
  value       = module.pubsub.info
  description = "Info about the request/response pubsub topics and subscription to use in the test"
}