如何在Terraform 0.12中遍历列表(对象)

问题描述

我需要部署GCP计算实例列表.如何通过"vms"循环for_each在这样的对象列表中:

I need to deploy a list of GCP compute instances. How do I loop for_each through the "vms" in a list of objects like this:

    "gcp_zone": "us-central1-a",
    "image_name": "centos-cloud/centos-7",
    "vms": [
      {
        "hostname": "test1-srfe",
        "cpu": 1,
        "ram": 4,
        "hdd": 15,
        "log_drive": 300,
        "template": "Template-New",
        "service_types": [
          "sql",
          "db01",
          "db02"
        ]
      },
      {
        "hostname": "test1-second",
        "cpu": 1,
        "ram": 4,
        "hdd": 15,
        "template": "APPs-Template",
        "service_types": [
          "configs"
        ]
      }
    ]
}

推荐答案

似乎我找到了解决方法.如果您不传递地图，而是传递地图列表，则可以使用此类代码

Seem's like I found what to do. If you pass not the maps of maps but the list of maps you can use such code

resource "google_compute_instance" "node" {
    for_each = {for vm in var.vms:  vm.hostname => vm}

    name         = "${each.value.hostname}"
    machine_type = "custom-${each.value.cpu}-${each.value.ram*1024}"
    zone         = "${var.gcp_zone}"

    boot_disk {
        initialize_params {
        image = "${var.image_name}"
        size = "${each.value.hdd}"
        }
    }

    network_interface {
        network = "${var.network}"
    }

    metadata = {
        env_id = "${var.env_id}"
        service_types = "${join(",",each.value.service_types)}"
  }
}

它将创建实际的实例数，并且当您删除例如中间的三个实例之一(如果创建三个:))时，terraform将删除我们要求的内容.

It will create actual number of instance and when you remove for example middle one of three(if you create three:)), terraform will remove what we asked.

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