Question

我想在CloudWatch上创建一个指标过滤器和一个基于它的警报来通知我有关S3事件的信息，特别是当文件或存储桶设置为公共时。这是我用于创建指标的指标过滤器：

{（$ .eventSource = s3.amazonaws.com）＆amp;＆amp; （（$ .eventName = PutBucketAcl） || （$ .eventName = PutObjectAcl））＆amp;＆amp; （（$ .requestParameters.AccessControlPolicy.AccessControlList.Grant.Grantee.type = Group））}

我通过添加以下pattern来测试此Custom log data：

{
    "Records": [
    {
        "eventVersion": "1.03",
        "userIdentity": {
            "type": "IAMUser",
            "principalId": "111122223333",
            "arn": "arn:aws:iam::111122223333:user/myUserName",
            "accountId": "111122223333",
            "accessKeyId": "AKIAIOSFODNN7EXAMPLE",
            "userName": "myUserName"
        },
        "eventTime": "2015-08-26T20:46:31Z",
        "eventSource": "s3.amazonaws.com",
        "eventName": "DeleteBucketPolicy",
        "awsRegion": "us-west-2",
        "sourceIPAddress": "127.0.0.1",
        "userAgent": "[]",
        "requestParameters": {
            "bucketName": "myawsbucket"
        },
        "responseElements": null,
        "requestID": "47B8E8D397DCE7A6",
        "eventID": "cdc4b7ed-e171-4cef-975a-ad829d4123e8",
        "eventType": "AwsApiCall",
        "recipientAccountId": "111122223333"
    },
    {
       "eventVersion": "1.03",
       "userIdentity": {
            "type": "IAMUser",
            "principalId": "111122223333",
            "arn": "arn:aws:iam::111122223333:user/myUserName",
            "accountId": "111122223333",
            "accessKeyId": "AKIAIOSFODNN7EXAMPLE",
            "userName": "myUserName"
        },
      "eventTime": "2015-08-26T20:46:31Z",
      "eventSource": "s3.amazonaws.com",
      "eventName": "PutBucketAcl",
      "awsRegion": "us-west-2",
      "sourceIPAddress": "",
      "userAgent": "[]",
      "requestParameters": {
          "bucketName": "",
          "AccessControlPolicy": {
              "AccessControlList": {
                  "Grant": {
                      "Grantee": {
                          "xsi:type": "Group",
                          "xmlns:xsi": "http://www.w3.org/2001/XMLSchema-instance",
                          "ID": "d25639fbe9c19cd30a4c0f43fbf00e2d3f96400a9aa8dabfbbebe1906Example"
                       },
                      "Permission": "FULL_CONTROL"
                   }
              },
              "xmlns": "http://s3.amazonaws.com/doc/2006-03-01/",
              "Owner": {
                  "ID": "d25639fbe9c19cd30a4c0f43fbf00e2d3f96400a9aa8dabfbbebe1906Example"
              }
          }
      },
      "responseElements": null,
      "requestID": "BD8798EACDD16751",
      "eventID": "607b9532-1423-41c7-b048-ec2641693c47",
      "eventType": "AwsApiCall",
      "recipientAccountId": "111122223333"
    },
    {
      "eventVersion": "1.03",
      "userIdentity": {
          "type": "IAMUser",
          "principalId": "111122223333",
          "arn": "arn:aws:iam::111122223333:user/myUserName",
          "accountId": "111122223333",
          "accessKeyId": "AKIAIOSFODNN7EXAMPLE",
          "userName": "myUserName"
        },
      "eventTime": "2015-08-26T20:46:31Z",
      "eventSource": "s3.amazonaws.com",
      "eventName": "GetBucketVersioning",
      "awsRegion": "us-west-2",
      "sourceIPAddress": "",
      "userAgent": "[]",
      "requestParameters": {
          "bucketName": "myawsbucket"
      },
      "responseElements": null,
      "requestID": "07D681279BD94AED",
      "eventID": "f2b287f3-0df1-4961-a2f4-c4bdfed47657",
      "eventType": "AwsApiCall",
      "recipientAccountId": "111122223333"
    }
  ]
}

我点击了测试图案，我收到了这条消息：

结果在示例日志中的50个事件中找到0个匹配项。

metric filter是否正确且正确？我应该有一个结果，但它不会出现。

Answer 1

计算策略是否提供开放访问非常复杂，因为可以在Bucket Policy中指定规则的多种方式（例如，通配符可以提供访问权限）。

更简单的方法是在Trusted Advisor中使用 Amazon S3 Bucket Permissions 检查：

检查Amazon Simple Storage Service（Amazon S3）中具有开放访问权限或允许访问任何经过身份验证的AWS用户的存储桶。

然后您可以Monitor Trusted Advisor Check Results with Amazon CloudWatch Events。

但是，特定检查不包含在Trusted Advisor免费套餐中。您需要在支持计划上才能运行该支票。

最近还更新了Amazon S3控制台 - 它现在清楚地显示了具有公共权限的任何存储桶。

创建CloudWatch Alarm以通知有关将S3对象设置为public的信息

1 个答案: