无法获取子网ID。 地形图

Question

我在执行Terraform plan时遇到错误。 我在这里遵循模块的概念。

以下是我的资源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：索引无效

     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

据我从您的代码中了解到的，您正在尝试为VPC中的每个子网（每个可用区一个）为EFS创建一个挂载点，并且要这样做，您希望Terraform自动解析可用区，然后为安装目标分配子网ID？ 显然，如果您只想将aws_subnet.app_subnet_0.1添加到aws_subnet.app_subnet_0.x，则您编写的代码试图将子网属性之一与计数器的值相匹配。也许您可以这样说

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

Answer 2

aws_subnet数据源返回单个子网，而不是列表，并且您似乎没有在count循环。

如果您希望返回多个子网，则可能需要aws_subnet_ids数据源 。

因此，如果要在与子网过滤器匹配的每个子网中创建EFS挂载目标，则可以使用以下命令：

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}"]
}

这将找到名称与search_pattern_app变量匹配的所有子网，并在每个子网中创建EFS安装目标。