从Terraform输入变量中获取ECS任务定义环境变量

问题描述

我正在尝试使用terraform部署ECS任务定义。这是我的ECS任务定义资源代码：

resource "aws_ecs_task_deFinition" "my_TD" {
  family                   = "my_container"
  container_deFinitions    = <<DEFinitioN
    [{
      "name": "my_container","image": "${format("%s:qa",var.my_ecr_arn)}","portMappings": [
        {
          "containerPort": 80,"hostPort": 80
        }
      ],"memory": 300,"networkMode": "awsvpc","environment": [
        {
          "name": "PORT","value": "80"
        },{
          "name": "Token","value": "xxxxxxxx"
        }
      ]
    }
  ]
  DEFinitioN
  requires_compatibilities = ["EC2"]
  network_mode             = "awsvpc"
  cpu                      = "256"
  memory                   = "512"
  task_role_arn            = var.ecs_role
  execution_role_arn       = var.ecs_role
}

环境变量在此处被硬编码。因此，我尝试从terraform输入中获取那些环境变量。因此，我修改为：

variable "my_env_variables"{
  default = [
        {
          "name": "PORT",{
          "name": "token","value": "xxxxx"
        }
      ]
}

...
...
"environment" : "${var.my_env_variables}"
...
...

这给了我这样的问题：

var.my_env_variables is tuple with 1 element

Cannot include the given value in a string template: string required.

我是terraform的新手。我该如何解决这个问题？

解决方法

您需要json字符串，可以使用jsonencode获得。因此，您可以尝试以下操作：

resource "aws_ecs_task_definition" "my_TD" {
  family                   = "my_container"
  container_definitions    = <<DEFINITION
    [{
      "name": "my_container","image": "${format("%s:qa",var.my_ecr_arn)}","portMappings": [
        {
          "containerPort": 80,"hostPort": 80
        }
      ],"memory": 300,"networkMode": "awsvpc","environment": ${jsonencode(var.my_env_variables)}
    }
  ]
  DEFINITION
  requires_compatibilities = ["EC2"]
  network_mode             = "awsvpc"
  cpu                      = "256"
  memory                   = "512"
  task_role_arn            = var.ecs_role
  execution_role_arn       = var.ecs_role
}