无法获取子网 ID |地形规划

Question

我在执行Terraform plan 时遇到错误。我在这里关注模块概念。

下面是我的资源 aws_efs_mount_target 和 aws_subnet 块。

efs.tf:-

resource "aws_efs_file_system" "master_efs" {
  creation_token   = "master"
  performance_mode = "generalPurpose"
  kms_key_id       = "${data.terraform_remote_state.kms_ebs.outputs.key_arn}"
  encrypted        = "true"
  tags = {
    Name        = "master"
    Environment = "${var.environment}"
    Terraform   = "true"
  }
}
resource "aws_efs_mount_target" "master_mt" {
  file_system_id  = "${aws_efs_file_system.master_efs.id}"
  count           = "${length(var.availability_zones)}"
  subnet_id      = "${data.aws_subnet.app_subnet_0.*.id[count.index]}"
  security_groups = [ "${aws_security_group.sg.id}" ]
}

data "aws_subnet" "app_subnet_0" {
  vpc_id = "${data.aws_vpc.cng.id}"
  filter {
    name    = "tag:Name"
    values  = ["${var.search_pattern_app}-0"]
  }
}

错误：无效索引

     on ../../modules/efs.tf line 16, in resource "aws_efs_mount_target" "master_mt":
      16:   subnet_id      = "${data.aws_subnet.app_subnet_0.*.id[count.index]}"
        |----------------
        | count.index is 2
        | data.aws_subnet.app_subnet_0 is object with 15 attributes

    The given key does not identify an element in this collection value.


Error: Invalid index



     on ../../modules/efs.tf line 16, in resource "aws_efs_mount_target" "master_mt":
      16:   subnet_id      = "${data.aws_subnet.app_subnet_0.*.id[count.index]}"
        |----------------
        | count.index is 1
        | data.aws_subnet.app_subnet_0 is object with 15 attributes

    The given key does not identify an element in this collection value.

Error: Invalid index

  on ../../modules/efs.tf line 35, in resource "aws_efs_mount_target" "worker_mt":
  35:   subnet_id      = "${data.aws_subnet.app_subnet_0.*.id[count.index]}"
    |----------------
    | count.index is 1
    | data.aws_subnet.app_subnet_0 is object with 15 attributes

The given key does not identify an element in this collection value.


Error: Invalid index

  on ../../modules/efs.tf line 35, in resource "aws_efs_mount_target" "worker_mt":
  35:   subnet_id      = "${data.aws_subnet.app_subnet_0.*.id[count.index]}"
    |----------------
    | count.index is 2
    | data.aws_subnet.app_subnet_0 is object with 15 attributes

The given key does not identify an element in this collection value.

Answer 1

根据我从您的代码中了解到的情况，您正在尝试为 VPC 中的每个子网（每个可用区一个）为您的 EFS 创建一个挂载点，并且您希望 Terraform 自动解析可用性zone，然后为挂载目标分配子网ID？ 显然，您编写的代码正在尝试将子网属性之一与计数器的值匹配，如果您只想将 aws_subnet.app_subnet_0.1 添加到 aws_subnet.app_subnet_0.x 也许您可以这样说

aws_subnet.app_subnet_0.${count.index}.id

Answer 2

aws_subnet data source 返回一个单个子网，而不是一个列表，而且您似乎没有用count 循环它。

如果您希望返回多个子网，那么您可能需要aws_subnet_ids data source。

因此，如果您想在每个子网中创建一个与子网过滤器匹配的 EFS 挂载目标，您可以使用以下内容：

resource "aws_efs_file_system" "master_efs" {
  creation_token   = "master"
  performance_mode = "generalPurpose"
  kms_key_id       = "${data.terraform_remote_state.kms_ebs.outputs.key_arn}"
  encrypted        = "true"

  tags = {
    Name        = "master"
    Environment = "${var.environment}"
    Terraform   = "true"
  }
}

data "aws_subnet_ids" "app_subnet" {
  vpc_id = "${data.aws_vpc.cng.id}"

  tags = {
    Name = "${var.search_pattern_app}"
  }
}

resource "aws_efs_mount_target" "master_mt" {
  file_system_id  = "${aws_efs_file_system.master_efs.id}"
  count           = "${length(var.availability_zones)}"
  subnet_id       = "${data.aws_subnet.app_subnet.ids[count.index]}"
  security_groups = ["${aws_security_group.sg.id}"]
}

这会查找名称与search_pattern_app 变量匹配的所有子网，并在每个子网中创建 EFS 挂载目标。