本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

# Amazon EMR 唯讀存取的 IAM 受管政策 (v2 受管預設政策）
<a name="emr-managed-policy-readonly-v2"></a>

若要授予 Amazon EMR 唯讀權限，請附接 **AmazonEMRReadOnlyAccessPolicy\$1v2** 受管政策。此預設受管政策會取代 [`AmazonElasticMapReduceReadOnlyAccess`](emr-managed-policy-readonly.md) 受管政策。此政策陳述式的內容顯示在下列程式碼片段中。與 `AmazonElasticMapReduceReadOnlyAccess` 政策相比，`AmazonEMRReadOnlyAccessPolicy_v2` 政策不會對 `elasticmapreduce` 元素使用萬用字元。相反地，預設 v2 政策會限制允許的 `elasticmapreduce` 動作。

**注意**  
您也可以使用 AWS 管理主控台 連結[https://console.aws.amazon.com/iam/home#policies/arn:aws:iam::aws:policy/AmazonEMRReadOnlyAccessPolicy_v2](https://console.aws.amazon.com/iam/home#policies/arn:aws:iam::aws:policy/AmazonEMRReadOnlyAccessPolicy_v2)來檢視政策。

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#### [ JSON ]

****  

```
{
  "Version":"2012-10-17",		 	 	 
  "Statement": [
    {
      "Sid": "ElasticMapReduceActions",
      "Effect": "Allow",
      "Action": [
        "elasticmapreduce:DescribeCluster",
        "elasticmapreduce:DescribeEditor",
        "elasticmapreduce:DescribeJobFlows",
        "elasticmapreduce:DescribeSecurityConfiguration",
        "elasticmapreduce:DescribeStep",
        "elasticmapreduce:DescribeReleaseLabel",
        "elasticmapreduce:GetBlockPublicAccessConfiguration",
        "elasticmapreduce:GetManagedScalingPolicy",
        "elasticmapreduce:GetAutoTerminationPolicy",
        "elasticmapreduce:ListBootstrapActions",
        "elasticmapreduce:ListClusters",
        "elasticmapreduce:ListEditors",
        "elasticmapreduce:ListInstanceFleets",
        "elasticmapreduce:ListInstanceGroups",
        "elasticmapreduce:ListInstances",
        "elasticmapreduce:ListSecurityConfigurations",
        "elasticmapreduce:ListSteps",
        "elasticmapreduce:ListSupportedInstanceTypes",
        "elasticmapreduce:ViewEventsFromAllClustersInConsole"
      ],
      "Resource": [
        "*"
      ]
    },
    {
      "Sid": "ViewMetricsInEMRConsole",
      "Effect": "Allow",
      "Action": [
        "cloudwatch:GetMetricStatistics"
      ],
      "Resource": [
        "*"
      ]
    }
  ]
}
```

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