community/modules/scripts/wait-for-startup/main.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
 *
 *      http://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 {
  combined_instance_names = concat(var.instance_names, [var.instance_name])
}

resource "null_resource" "validate_instance_names" {
  lifecycle {
    precondition {
      condition     = var.instance_name != null || length(var.instance_names) > 0
      error_message = "At least one instance name must be provided"
    }
  }
}

resource "null_resource" "wait_for_startup" {
  count = length(local.combined_instance_names)

  provisioner "local-exec" {
    command = "/bin/bash ${path.module}/scripts/wait-for-startup-status.sh"
    environment = {
      INSTANCE_NAME = self.triggers.instance_name
      ZONE          = var.zone
      PROJECT_ID    = var.project_id
      TIMEOUT       = var.timeout
      GCLOUD_PATH   = var.gcloud_path_override
    }
  }

  triggers = {
    instance_name = local.combined_instance_names[count.index]
  }
}