amazon-s3 - 向 S3 存储桶添加策略时获取“缺少必填字段 Principal”

Question

我正在关注放大文档有关如何配置存储的将策略添加到文档时，出现以下错误：

Missing required field Principal

我不知道为什么……？

政策文件（来自文档）：

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Action": [
                "s3:GetObject",
                "s3:PutObject",
                "s3:DeleteObject"
            ],
            "Resource": [
                "arn:aws:s3:::{enter bucket name}/public/*",
                "arn:aws:s3:::{enter bucket name}/protected/${cognito-identity.amazonaws.com:sub}/*",
                "arn:aws:s3:::{enter bucket name}/private/${cognito-identity.amazonaws.com:sub}/*"
            ],
            "Effect": "Allow"
        },
        {
            "Action": [
                "s3:PutObject"
            ],
            "Resource": [
                "arn:aws:s3:::{enter bucket name}/uploads/*"
            ],
            "Effect": "Allow"
        },
        {
            "Action": [
                "s3:GetObject"
            ],
            "Resource": [
                "arn:aws:s3:::{enter bucket name}/protected/*"
            ],
            "Effect": "Allow"
        },
        {
            "Condition": {
                "StringLike": {
                    "s3:prefix": [
                        "public/",
                        "public/*",
                        "protected/",
                        "protected/*",
                        "private/${cognito-identity.amazonaws.com:sub}/",
                        "private/${cognito-identity.amazonaws.com:sub}/*"
                    ]
                }
            },
            "Action": [
                "s3:ListBucket"
            ],
            "Resource": [
                "arn:aws:s3:::{enter bucket name}"
            ],
            "Effect": "Allow"
        }
    ]
}

Answer 1

您缺少该Principal块，该块定义了您授予谁权限。这是Resource块的对应部分，它定义了权限的用途。查看示例存储桶策略，例如：

{
  "Version":"2012-10-17",
  "Statement":[
    {
      "Sid":"PublicRead",
      "Effect":"Allow",
      "Principal": "*",
      "Action":["s3:GetObject"],
      "Resource":["arn:aws:s3:::examplebucket/*"]
    }
  ]
}

授予所有人只读权限 ( *)。