Terraform - 将策略附加到 s3 存储桶

Question

我创建了一个较早的帖子来解决在不尝试复制代码的情况下创建多个 s3 存储桶的问题。效果很好！

Terraform - creating multiple buckets

aws_iam_policy 如下所示：

resource "aws_iam_policy" "user_policy" {
  count         = "${length(var.s3_bucket_name)}"
  name          = "UserPolicy"

policy                    = <<EOF
{
"Version": "2012-10-17",
"Statement": [
{
"Effect": "Allow",
"Action": [
"s3:PutObject",
"s3:GetObject",
"s3:DeleteObject",
"s3:ListBucket",
"s3:GetLifecycleConfiguration",
"s3:PutLifecycleConfiguration",
"s3:PutObjectTagging",
"s3:GetObjectTagging",
"s3:DeleteObjectTagging"
],
"Resource": [
"arn:aws:s3:::${var.s3_bucket_name[count.index]}",
"arn:aws:s3:::${var.s3_bucket_name[count.index]}/*"
]
}
]
}
EOF
}

这是我附加政策的方式：

resource "aws_iam_user_policy_attachment" "user_policy_attach" {
    user       = "${aws_iam_user.user.name}"
    policy_arn = "${aws_iam_policy.user_policy.arn}"
}

不幸的是，附加 IAM 用户策略会给我一个错误，因为它必须遍历索引：

Resource 'aws_iam_policy.user_policy' not found for variable 'aws_iam_policy.user_policy.arn'

Answer 1

我认为您不能像这样在策略中内联变量。相反，您需要创建一个template_file，并将模板的结果提供给策略。

这将为每个存储桶创建一个策略（名称取自上一个问题）

• UserPolicy-prod_bucket
• UserPolicy-stage-bucket
• UserPolicy-qa-bucket

然后，您需要再次使用 count 将每个策略附加到 aws_iam_user.user.name。像这样

data "template_file" "policy" {
  count = "${length(var.s3_bucket_name)}"

  template = <<EOF
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": [
        "s3:PutObject",
        "s3:GetObject",
        "s3:DeleteObject",
        "s3:ListBucket",
        "s3:GetLifecycleConfiguration",
        "s3:PutLifecycleConfiguration",
        "s3:PutObjectTagging", "s3:GetObjectTagging", "s3:DeleteObjectTagging" ],
      "Resource": [
        "arn:aws:s3:::$${bucket}",
        "arn:aws:s3:::$${bucket}/*"
      ]
    }
  ]
}
EOF

  vars {
    bucket = "${var.s3_bucket_name[count.index]}"
  }
}

resource "aws_iam_policy" "user_policy" {
  count = "${length(var.s3_bucket_name)}"
  name  = "UserPolicy-${element(var.s3_bucket_name, count.index)}"

  policy = "${element(data.template_file.policy.*.rendered, count.index)}"
}

resource "aws_iam_user_policy_attachment" "user_policy_attach" {
  count      = "${length(var.s3_bucket_name)}"
  user       = "${aws_iam_user.user.name}"
  policy_arn = "${element(aws_iam_policy.user_policy.*.arn, count.index)}"
}