Question

在terraform中，我试图将变量（列表）传递给我们构建的模块。该变量需要在aws_ecs_task_definition的{{1}}资源中使用。
现在，我只是从一个定义为变量的空默认列表开始：

container_definitions

我的ECS任务定义如下：

variable "task_enviornment" {
  type        = "list"
  default = []
}

我对“环境”部分有疑问的部分：

resource "aws_ecs_task_definition" "ecs_task_definition" {
  family                   = "${var.ecs_family}"
  network_mode             = "awsvpc"
  task_role_arn            = "${aws_iam_role.iam_role.arn}"
  execution_role_arn       = "${data.aws_iam_role.iam_ecs_task_execution_role.arn}"
  requires_compatibilities = ["FARGATE"]
  cpu                      = "${var.fargate_cpu}"
  memory                   = "${var.fargate_memory}"

  container_definitions =<<DEFINITION
  [
    {
      "cpu": ${var.fargate_cpu},
      "image": "${var.app_image}",
      "memory": ${var.fargate_memory},
      "name": "OURNAME",
      "networkMode": "awsvpc",
      "environment": "${jsonencode(var.task_enviornment)}",
      "logConfiguration": {
        "logDriver": "awslogs",
        "options": {
          "awslogs-group" : "${aws_cloudwatch_log_group.fargate-logs.name}",
          "awslogs-region": "us-east-1",
          "awslogs-stream-prefix": "demo"
        }
      },
      "portMappings": [
        {
        "containerPort": ${var.app_port},
        "hostPort": ${var.app_port}
        }
      ]
    }
  ]
  DEFINITION
}

我尝试了几种不同的方法来使其正常工作。

如果我这样做"environment": "${jsonencode(var.task_enviornment)}", 我得到"environment": "${jsonencode(var.task_enviornment)}",

如果我做ECS Task Definition container_definitions is invalid: Error decoding JSON: json: cannot unmarshal string into Go struct field ContainerDefinition.Environment of type []*ecs.KeyValuePair或"environment": "${var.task_enviornment}",
我得到"environment": ["${var.task_enviornment}"], 然后，它仅输出At column 1, line 1: output of an HIL expression must be a string, or a single list (argument 8 is TypeList) in:

的内容

我也尝试添加默认值，并且收到类似的错误消息。但是我确实需要能够处理没有发送的值，因此是一个空列表。

container_definitions

Answer 1

经过大量调查和新的眼光，他找到了解决方案。我不确定为什么可以解决此问题，我觉得这可能是一个错误。
需要做2件事来解决此问题。

从变量定义中删除type = "list"。

variable "task_environment" { default = [] }
使用变量时请删除引号：
"environment": ${jsonencode(var.task_environment)},

Answer 2

以下解决方案应该有效

在variable.tf

variable "app_environments_vars" {
type        = list(map(string))
default     = []
description = "environment varibale needed by the application"
default = [
{
  "name" = "BUCKET",
  "value" = "test"
},{
  "name" = "BUCKET1",
  "value" = "test1"
}]

，在您的任务定义中，您可以使用类似于{p>的${jsonencode(var.app_environments_vars)}

container_definitions =<<DEFINITION
  [
    {
      "cpu": ${var.fargate_cpu},
      "image": "${var.app_image}",
      "memory": ${var.fargate_memory},
      "name": "OURNAME",
      "networkMode": "awsvpc",
      "environment": ${jsonencode(var.envoy_environments_vars)},
      "logConfiguration": {
        "logDriver": "awslogs",
        "options": {
          "awslogs-group" : "${aws_cloudwatch_log_group.fargate-logs.name}",
          "awslogs-region": "us-east-1",
          "awslogs-stream-prefix": "demo"
        }
      },
      "portMappings": [
        {
        "containerPort": ${var.app_port},
        "hostPort": ${var.app_port}
        }
      ]
    }
  ]

Answer 3

我的猜测是您正在尝试使用类型“映射”而不是列表，如上所示，从类型规范中删除将起作用。示例：

List_sample = [1,2,3]
Map_sample = { key_name = "value" }

参考：Terraform - Type Constraints

在带Terraform的container_definitions中将列表变量用于ECS任务

3 个答案: