Amazon web services aws s3存储桶策略未按预期工作

我在一个AWS帐户中有一个s3存储桶，比如ACCID1。我想允许root用户和一个特定的用户USER1对其拥有完全访问权限。从另一个帐户ACCID2，我有IAM角色，我想附加到EC2实例，只允许从该IAM角色访问。 角色是备份完全访问（读、写和删除）。 我创建了以下bucket策略，但无法通过使用上述IAM角色（在ACCID2中）启动的EC2实例访问bucket。 我能够从EC2实例中使用它作为ACCID1中的USER1，并执行列表、创建和删除

{  
   "Version":"2012-10-17",
   "Id":"BackupBucketPolicy",
   "Statement":[  
      {  
         "Sid":"DenyAllOther",
         "Effect":"Deny",
         "NotPrincipal":{  
            "AWS":[  
               "arn:aws:iam::ACCID1:user/USER1",
               "arn:aws:iam::ACCID1:root",
               "arn:aws:iam::ACCID2:role/backup-full-access"
            ]
         },
         "Action":"s3:*",
         "Resource":[  
            "arn:aws:s3:::test-nr-6",
            "arn:aws:s3:::test-nr-6/*"
         ]
      },
      {  
         "Sid":"DevAccountRootFullAccess",
         "Effect":"Allow",
         "Principal":{  
            "AWS":[  
               "arn:aws:iam::ACCID1:user/USER1",
               "arn:aws:iam::ACCID1:root"
            ]
         },
         "Action":"s3:*",
         "Resource":[  
            "arn:aws:s3:::test-nr-6",
            "arn:aws:s3:::test-nr-6/*"
         ]
      },
      {  
         "Sid":"GraphBackupReadWriteDeleteAccess",
         "Effect":"Allow",
         "Principal":{  
            "AWS":"arn:aws:iam::ACCID2:role/backup-full-access"
         },
         "Action":[  
            "s3:ListBucket",
            "s3:GetObject",
            "s3:PutObject",
            "s3:DeleteObject"
         ],
         "Resource":[  
            "arn:aws:s3:::test-nr-6",
            "arn:aws:s3:::test-nr-6/*"
         ]
      }
   ]
}

IAM角色备份完全访问权限具有以下策略：

{  
   "Version":"2012-10-17",
   "Statement":[  
      {  
         "Sid":"Stmt2",
         "Effect":"Allow",
         "Action":[  
            "s3:ListBucket",
            "s3:GetObject",
            "s3:PutObject",
            "s3:DeleteObject"
         ],
         "Resource":[  
            "arn:aws:s3:::test-nr-6",
            "arn:aws:s3:::test-nr-6/*"
         ]
      }
   ]
}

我不知道这里出了什么问题。 任何帮助都将不胜感激。

首先，您不需要拒绝所有其他策略，因为默认情况下S3存储桶权限是拒绝的

其次，创建跨帐户访问时，需要将

备份完全访问

角色的类型设置为角色

最后，您的角色策略应写成：

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Action": "s3:ListAllMyBuckets",
      "Resource": "arn:aws:s3:::*"
    },
    {
      "Effect": "Allow",
      "Action": [
        "s3:ListBucket",
        "s3:GetBucketLocation"
       ],
      "Resource": "arn:aws:s3:::test-nr-6"
    },
    {
      "Effect": "Allow",
      "Action": [
        "s3:GetObject",
        "s3:PutObject",
        "s3:DeleteObject"
      ],
      "Resource": "arn:aws:s3:::test-nr-6/*"
    }
  ]
}

资料来源：