terraform/modules/autoscaler-scheduler/main.tf

/**
 * Copyright 2024 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.
 */

locals {
  config = var.json_config != "" ? var.json_config : base64encode(jsonencode([
    merge({
      "projectId" : "${var.project_id}",
      "regionId" : "${var.location}",
      "clusterId" : "${var.memorystore_cluster_name}",
      "engine" : "${var.memorystore_engine}",
      "scalerPubSubTopic" : "${var.target_pubsub_topic}",
      "units" : "${var.units}",
      "minSize" : var.min_size,
      "maxSize" : var.max_size,
      "scalingProfile" : "${var.scaling_profile}",
      "scalingMethod" : "${var.scaling_method}",
      "stateDatabase" : var.terraform_spanner_state ? {
        "name" : "spanner",
        "instanceId" : "${var.spanner_state_name}",
        "databaseId" : "${var.spanner_state_database}",
        } : {
        "name" : "firestore",
        "databaseId" : "${var.firestore_state_database}"
      }
      },
      var.state_project_id != null ? {
        "stateProjectId" : "${var.state_project_id}"
    } : {})
  ]))
}

resource "google_cloud_scheduler_job" "poller_job" {
  name        = "poll-cluster-metrics"
  description = "Poll metrics for the configured Memorystore cluster"
  schedule    = var.schedule
  time_zone   = var.time_zone

  pubsub_target {
    topic_name = var.pubsub_topic
    data       = local.config
  }

  retry_config {
    retry_count          = 0
    max_backoff_duration = "3600s"
    max_retry_duration   = "0s"
    max_doublings        = 5
    min_backoff_duration = "5s"
  }

  /**
   * Uncomment this stanza if you would prefer to manage the Cloud Scheduler
   * configuration manually following its initial creation, i.e. using the
   * Google Cloud Web Console, the gcloud CLI, or any other non-Terraform
   * mechanism. Without this change, the Terraform configuration will remain
   * the source of truth, and any direct modifications to the Cloud Scheduler
   * configuration will be reset on the next Terraform run. Please see the
   * following link for more details:
   *
   * https://developer.hashicorp.com/terraform/language/meta-arguments/lifecycle#ignore_changes
   */
  /*
  lifecycle {
    ignore_changes = [pubsub_target[0].data]
  }
  */
}