创建资源迭代地图的值而不是关键 - terraform

Question

我不知道如何循环遍历下面地图的值之和。

variable "images" {
  default = {
    "rhel-8-factory-os-ready" = {
       "availability_zone" = "eu-fra-1ah"
       "flavor" = 4
       "instance_count" = 2
       "image_name" = "rhel-8-factory-os-ready"
    },
    "rhel-7-factory-os-ready" = {
       "availability_zone" = "eu-fra-1ai"
       "instance_count" = 3
       "flavor" = 3
       "image_name" = "rhel-7-factory-os-ready"
    },
    "rhel-6-factory-os-ready" = {
       "availability_zone" = "eu-fra-1ah"
       "instance_count" = 3
       "flavor" = 3
       "image_name" = "rhel-6-factory-os-ready"
    }
  }
}

在这里，我要遍历所有键的instance_count 属性的总和，并根据instance_count 创建实例。

我可以使用以下内置函数计算instance_count 的总和。

locals {
  list_sum = length(flatten([for i in var.images: range(i["instance_count"])]))
}

如何遍历list_sum 变量并根据instance_count 创建资源？

我创建了以下列表以创建资源::

locals {
  list_images = tolist(keys(var.images))
  list_instance_count = [for i in var.images: i["instance_count"]]
  list_flavors = [for i in var.images: i["flavor"]]
  list_image_names = [for i in var.images: i["image_name"]]
  list_availability_zones = [for i in var.images: i["availability_zone"]]
}

我的资源::

resource "openstack_compute_instance_v2" "instance" {
  count = local.list_sum
  image_name = element(local.list_image_names, count.index +1 )
  flavor_id = element(local.list_flavors, (count.index + 1) )
  name = element(local.list_image_names, (count.index + 1) )
  security_groups = var.security_group
  availability_zone = element(local.list_availability_zones, (count.index + 1) )
  key_pair = "foptst"
  network {
    name = var.network_name
  }
}

到现在为止，您可能已经知道我的迭代是不正确的。我的资源块必须根据 instance_count 变量创建资源数量，即 rhel-8-factory-os-ready 的 2 个实例、rhel-7-factory-os-ready 的 3 个实例和 rhel-6-factory-os-ready 的 3 个实例。

由于循环不正确，我无法得到它。如果有人可以帮助我如何正确地迭代以按预期创建资源，那就太好了。

提前非常感谢， 哈沙

Answer 1

locals {
  expanded_image_names = flatten([
    for key, value in var.images : [
      for counter in range(var.images[key]["instance_count"]): var.images[key]["image_name"]
    ]
  ])
}

output "expanded_image_names" {
  value = local.expanded_image_names
}

这将产生：

expanded_image_names = [
  "rhel-6-factory-os-ready",
  "rhel-6-factory-os-ready",
  "rhel-6-factory-os-ready",
  "rhel-7-factory-os-ready",
  "rhel-7-factory-os-ready",
  "rhel-7-factory-os-ready",
  "rhel-8-factory-os-ready",
  "rhel-8-factory-os-ready",
]

然后使用它们：

resource "openstack_compute_instance_v2" "instance" {
  count = local.list_sum
  image_name = element(local.expanded_image_names, count.index +1 )  # <-----
  ... # Do similar for the others.

  key_pair = "foptst"
  network {
    name = var.network_name
  }
}