amazon-s3 - 如何授予 lambda 权限将文件上传到 `terraform` 中的 s3 存储桶？

Question

我在 TerraForm 中有以下 lambda 函数配置:

resource "aws_lambda_function" "test_lambda" {
  # filename         = "crawler/dist/deploy.zip"
  s3_bucket = "${var.s3-bucket}"
  s3_key    = "${aws_s3_bucket_object.file_upload.key}"
  # source_code_hash = "${filebase64sha256("file.zip")}"
  function_name    = "quote-crawler"
  role             = "arn:aws:iam::773592622512:role/LambdaRole"
  handler          = "handler.handler"
  source_code_hash = "${data.archive_file.zipit.output_base64sha256}"
  runtime          = "${var.runtime}"
  timeout          = 180

  environment {
    variables = {
      foo = "bar"
    }
  }
}

当我运行 lambda 时，当它尝试将文件上传到 s3 存储桶时，出现错误"errorMessage": "调用 PutObject 操作时发生错误 (AccessDenied):访问被拒绝"，。看来lambda函数没有访问s3的权限。 TerraForm 文档不清楚如何配置它们。权限配置面板也不会出现在 lambda 控制台上。似乎由 TerraForm 创建的 lambda 可供我使用的配置有限。那么如何向 lambda 授予 s3 权限呢？

Answer 1

为了方便起见，您可以通过三个步骤来完成此操作，

1. 创建角色
2. 创建政策
3. 为角色附加策略
4. 将角色附加到 lambda

创建角色。

resource "aws_iam_role" "role" {
  name = "${var.env_prefix_name}-alb-logs-to-elk"
  path = "/"

      assume_role_policy = <<EOF
    {

  "Version": "2012-10-17",
  "Statement": [
    {
      "Action": "sts:AssumeRole",
      "Principal": {
        "Service": "lambda.amazonaws.com"
      },
      "Effect": "Allow",
      "Sid": ""
    }
  ]
}
EOF
}

创建指定访问 s3 的策略

 #Created Policy for IAM Role
resource "aws_iam_policy" "policy" {
  name = "${var.env_prefix_name}-test-policy"
  description = "A test policy"


      policy = <<EOF
   {
"Version": "2012-10-17",
"Statement": [
    {
        "Effect": "Allow",
        "Action": [
            "logs:*"
        ],
        "Resource": "arn:aws:logs:*:*:*"
    },
    {
        "Effect": "Allow",
        "Action": [
            "s3:*"
        ],
        "Resource": "arn:aws:s3:::*"
    }
]

} 
    EOF
    }

附加的 IAM 角色和新创建的策略

resource "aws_iam_role_policy_attachment" "test-attach" {
  role       = "${aws_iam_role.role.name}"
  policy_arn = "${aws_iam_policy.policy.arn}"
}

现在将角色附加到 Lamba 源

resource "aws_lambda_function" "test_lambda" {
  # filename         = "crawler/dist/deploy.zip"
  s3_bucket = "${var.s3-bucket}"
  s3_key    = "${aws_s3_bucket_object.file_upload.key}"
  # source_code_hash = "${filebase64sha256("file.zip")}"
  function_name    = "quote-crawler"
  role             = "${aws_iam_role.role.arn}"
  handler          = "handler.handler"
  source_code_hash = "${data.archive_file.zipit.output_base64sha256}"
  runtime          = "${var.runtime}"
  timeout          = 180

  environment {
    variables = {
      foo = "bar"
    }
  }
}