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# Amazon EMR 的服务角色（EMR 角色）
<a name="emr-iam-role"></a>

Amazon EMR 角色定义了在预置资源，以及执行对于在集群中运行的特定 Amazon EC2 实例而言不会执行的服务级任务时，将允许 Amazon EMR 执行的操作。例如，服务角色用于在集群启动时配置 EC2 实例。
+ 默认角色名为 `EMR_DefaultRole_V2`。
+ 附加到 `EMR_DefaultRole_V2` 的 Amazon EMR 范围的默认托管式策略是 `AmazonEMRServicePolicy_v2`。此 v2 策略将取代弃用的默认托管式策略 `AmazonElasticMapReduceRole`。

`AmazonEMRServicePolicy_v2` 取决于对 Amazon EMR 预调配或使用的资源的范围缩小访问权限。使用此策略时，您需要在预置集群时传递用户标签 `for-use-with-amazon-emr-managed-policies = true`。Amazon EMR 将自动传播这些标签。此外，您可能需要手动向特定类型的资源添加用户标签，例如不是由 Amazon EMR 创建的 EC2 安全组。请参阅[标记资源以使用托管式策略](emr-managed-iam-policies.md#manually-tagged-resources)。

**重要**  
Amazon EMR 使用此 Amazon EMR 服务角色和 `AWSServiceRoleForEMRCleanup` 角色来清理账户中不再使用的集群资源，例如 Amazon EC2 实例。您必须在角色策略包含删除或终止资源所需的操作。否则，Amazon EMR 将无法执行这些清理操作，并且集群上剩余的未使用资源可能会产生费用。

下面显示的是当前 `AmazonEMRServicePolicy_v2` 策略的内容。您还可以在 IAM 控制台上查看 [https://console.aws.amazon.com/iam/home#policies/arn:aws:iam::aws:policy/service-role/AmazonEMRServicePolicy_v2](https://console.aws.amazon.com/iam/home#policies/arn:aws:iam::aws:policy/service-role/AmazonEMRServicePolicy_v2) 托管式策略的当前内容。

------
#### [ JSON ]

****  

```
{
  "Version":"2012-10-17",		 	 	 
  "Statement": [
    {
      "Sid": "CreateInTaggedNetwork",
      "Effect": "Allow",
      "Action": [
        "ec2:CreateNetworkInterface",
        "ec2:RunInstances",
        "ec2:CreateFleet",
        "ec2:CreateLaunchTemplate",
        "ec2:CreateLaunchTemplateVersion"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:subnet/*",
        "arn:aws:ec2:*:*:security-group/*"
      ],
      "Condition": {
        "StringEquals": {
          "aws:ResourceTag/for-use-with-amazon-emr-managed-policies": "true"
        }
      }
    },
    {
      "Sid": "CreateWithEMRTaggedLaunchTemplate",
      "Effect": "Allow",
      "Action": [
        "ec2:CreateFleet",
        "ec2:RunInstances",
        "ec2:CreateLaunchTemplateVersion"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:launch-template/*"
      ],
      "Condition": {
        "StringEquals": {
          "aws:ResourceTag/for-use-with-amazon-emr-managed-policies": "true"
        }
      }
    },
    {
      "Sid": "CreateEMRTaggedLaunchTemplate",
      "Effect": "Allow",
      "Action": [
        "ec2:CreateLaunchTemplate"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:launch-template/*"
      ],
      "Condition": {
        "StringEquals": {
          "aws:RequestTag/for-use-with-amazon-emr-managed-policies": "true"
        }
      }
    },
    {
      "Sid": "CreateEMRTaggedInstancesAndVolumes",
      "Effect": "Allow",
      "Action": [
        "ec2:RunInstances",
        "ec2:CreateFleet"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:instance/*",
        "arn:aws:ec2:*:*:volume/*"
      ],
      "Condition": {
        "StringEquals": {
          "aws:RequestTag/for-use-with-amazon-emr-managed-policies": "true"
        }
      }
    },
    {
      "Sid": "ResourcesToLaunchEC2",
      "Effect": "Allow",
      "Action": [
        "ec2:RunInstances",
        "ec2:CreateFleet",
        "ec2:CreateLaunchTemplate",
        "ec2:CreateLaunchTemplateVersion"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:network-interface/*",
        "arn:aws:ec2:*::image/ami-*",
        "arn:aws:ec2:*:*:key-pair/*",
        "arn:aws:ec2:*:*:capacity-reservation/*",
        "arn:aws:ec2:*:*:placement-group/pg-*",
        "arn:aws:ec2:*:*:fleet/*",
        "arn:aws:ec2:*:*:dedicated-host/*",
        "arn:aws:resource-groups:*:*:group/*"
      ]
    },
    {
      "Sid": "ManageEMRTaggedResources",
      "Effect": "Allow",
      "Action": [
        "ec2:CreateLaunchTemplateVersion",
        "ec2:DeleteLaunchTemplate",
        "ec2:DeleteNetworkInterface",
        "ec2:ModifyInstanceAttribute",
        "ec2:TerminateInstances"
      ],
      "Resource": [
        "*"
      ],
      "Condition": {
        "StringEquals": {
          "aws:ResourceTag/for-use-with-amazon-emr-managed-policies": "true"
        }
      }
    },
    {
      "Sid": "ManageTagsOnEMRTaggedResources",
      "Effect": "Allow",
      "Action": [
        "ec2:CreateTags",
        "ec2:DeleteTags"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:instance/*",
        "arn:aws:ec2:*:*:volume/*",
        "arn:aws:ec2:*:*:network-interface/*",
        "arn:aws:ec2:*:*:launch-template/*"
      ],
      "Condition": {
        "StringEquals": {
          "aws:ResourceTag/for-use-with-amazon-emr-managed-policies": "true"
        }
      }
    },
    {
      "Sid": "CreateNetworkInterfaceNeededForPrivateSubnet",
      "Effect": "Allow",
      "Action": [
        "ec2:CreateNetworkInterface"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:network-interface/*"
      ],
      "Condition": {
        "StringEquals": {
          "aws:RequestTag/for-use-with-amazon-emr-managed-policies": "true"
        }
      }
    },
    {
      "Sid": "TagOnCreateTaggedEMRResources",
      "Effect": "Allow",
      "Action": [
        "ec2:CreateTags"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:network-interface/*",
        "arn:aws:ec2:*:*:instance/*",
        "arn:aws:ec2:*:*:volume/*",
        "arn:aws:ec2:*:*:launch-template/*"
      ],
      "Condition": {
        "StringEquals": {
          "ec2:CreateAction": [
            "RunInstances",
            "CreateFleet",
            "CreateLaunchTemplate",
            "CreateNetworkInterface"
          ]
        }
      }
    },
    {
      "Sid": "TagPlacementGroups",
      "Effect": "Allow",
      "Action": [
        "ec2:CreateTags",
        "ec2:DeleteTags"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:placement-group/pg-*"
      ]
    },
    {
      "Sid": "ListActionsForEC2Resources",
      "Effect": "Allow",
      "Action": [
        "ec2:DescribeAccountAttributes",
        "ec2:DescribeCapacityReservations",
        "ec2:DescribeDhcpOptions",
        "ec2:DescribeImages",
        "ec2:DescribeInstances",
        "ec2:DescribeInstanceTypeOfferings",
        "ec2:DescribeLaunchTemplates",
        "ec2:DescribeNetworkAcls",
        "ec2:DescribeNetworkInterfaces",
        "ec2:DescribePlacementGroups",
        "ec2:DescribeRouteTables",
        "ec2:DescribeSecurityGroups",
        "ec2:DescribeSubnets",
        "ec2:DescribeVolumes",
        "ec2:DescribeVolumeStatus",
        "ec2:DescribeVpcAttribute",
        "ec2:DescribeVpcEndpoints",
        "ec2:DescribeVpcs"
      ],
      "Resource": [
        "*"
      ]
    },
    {
      "Sid": "CreateDefaultSecurityGroupWithEMRTags",
      "Effect": "Allow",
      "Action": [
        "ec2:CreateSecurityGroup"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:security-group/*"
      ],
      "Condition": {
        "StringEquals": {
          "aws:RequestTag/for-use-with-amazon-emr-managed-policies": "true"
        }
      }
    },
    {
      "Sid": "CreateDefaultSecurityGroupInVPCWithEMRTags",
      "Effect": "Allow",
      "Action": [
        "ec2:CreateSecurityGroup"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:vpc/*"
      ],
      "Condition": {
        "StringEquals": {
          "aws:ResourceTag/for-use-with-amazon-emr-managed-policies": "true"
        }
      }
    },
    {
      "Sid": "TagOnCreateDefaultSecurityGroupWithEMRTags",
      "Effect": "Allow",
      "Action": [
        "ec2:CreateTags"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:security-group/*"
      ],
      "Condition": {
        "StringEquals": {
          "aws:RequestTag/for-use-with-amazon-emr-managed-policies": "true",
          "ec2:CreateAction": "CreateSecurityGroup"
        }
      }
    },
    {
      "Sid": "ManageSecurityGroups",
      "Effect": "Allow",
      "Action": [
        "ec2:AuthorizeSecurityGroupEgress",
        "ec2:AuthorizeSecurityGroupIngress",
        "ec2:RevokeSecurityGroupEgress",
        "ec2:RevokeSecurityGroupIngress"
      ],
      "Resource": [
        "*"
      ],
      "Condition": {
        "StringEquals": {
          "aws:ResourceTag/for-use-with-amazon-emr-managed-policies": "true"
        }
      }
    },
    {
      "Sid": "CreateEMRPlacementGroups",
      "Effect": "Allow",
      "Action": [
        "ec2:CreatePlacementGroup"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:placement-group/pg-*"
      ]
    },
    {
      "Sid": "DeletePlacementGroups",
      "Effect": "Allow",
      "Action": [
        "ec2:DeletePlacementGroup"
      ],
      "Resource": [
        "*"
      ]
    },
    {
      "Sid": "AutoScaling",
      "Effect": "Allow",
      "Action": [
        "application-autoscaling:DeleteScalingPolicy",
        "application-autoscaling:DeregisterScalableTarget",
        "application-autoscaling:DescribeScalableTargets",
        "application-autoscaling:DescribeScalingPolicies",
        "application-autoscaling:PutScalingPolicy",
        "application-autoscaling:RegisterScalableTarget"
      ],
      "Resource": [
        "*"
      ]
    },
    {
      "Sid": "ResourceGroupsForCapacityReservations",
      "Effect": "Allow",
      "Action": [
        "resource-groups:ListGroupResources"
      ],
      "Resource": [
        "*"
      ]
    },
    {
      "Sid": "AutoScalingCloudWatch",
      "Effect": "Allow",
      "Action": [
        "cloudwatch:PutMetricAlarm",
        "cloudwatch:DeleteAlarms",
        "cloudwatch:DescribeAlarms"
      ],
      "Resource": [
        "arn:aws:cloudwatch:*:*:alarm:*_EMR_Auto_Scaling"
      ]
    },
    {
      "Sid": "PassRoleForAutoScaling",
      "Effect": "Allow",
      "Action": [
        "iam:PassRole"
      ],
      "Resource": [
        "arn:aws:iam::*:role/EMR_AutoScaling_DefaultRole"
      ],
      "Condition": {
        "StringLike": {
          "iam:PassedToService": "application-autoscaling.amazonaws.com*"
        }
      }
    },
    {
      "Sid": "PassRoleForEC2",
      "Effect": "Allow",
      "Action": [
        "iam:PassRole"
      ],
      "Resource": [
        "arn:aws:iam::*:role/EMR_EC2_DefaultRole"
      ],
      "Condition": {
        "StringLike": {
          "iam:PassedToService": "ec2.amazonaws.com*"
        }
      }
    },
    {
      "Sid": "CreateAndModifyEmrServiceVPCEndpoint",
      "Effect": "Allow",
      "Action": [
        "ec2:ModifyVpcEndpoint",
        "ec2:CreateVpcEndpoint"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:vpc-endpoint/*",
        "arn:aws:ec2:*:*:subnet/*",
        "arn:aws:ec2:*:*:security-group/*",
        "arn:aws:ec2:*:*:vpc/*"
      ],
      "Condition": {
        "StringEquals": {
          "aws:ResourceTag/for-use-with-amazon-emr-managed-policies": "true"
        }
      }
    },
    {
      "Sid": "CreateEmrServiceVPCEndpoint",
      "Effect": "Allow",
      "Action": [
        "ec2:CreateVpcEndpoint"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:vpc-endpoint/*"
      ],
      "Condition": {
        "StringEquals": {
          "aws:RequestTag/for-use-with-amazon-emr-managed-policies": "true",
          "aws:RequestTag/Name": "emr-service-vpce"
        }
      }
    },
    {
      "Sid": "TagEmrServiceVPCEndpoint",
      "Effect": "Allow",
      "Action": [
        "ec2:CreateTags"
      ],
      "Resource": [
        "arn:aws:ec2:*:*:vpc-endpoint/*"
      ],
      "Condition": {
        "StringEquals": {
          "ec2:CreateAction": "CreateVpcEndpoint",
          "aws:RequestTag/for-use-with-amazon-emr-managed-policies": "true",
          "aws:RequestTag/Name": "emr-service-vpce"
        }
      }
    }
  ]
}
```

------

您的服务角色应该使用下面的信任策略。

**重要**  
下面的信任策略包括 [https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_condition-keys.html#condition-keys-sourcearn](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_condition-keys.html#condition-keys-sourcearn) 和 [https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_condition-keys.html#condition-keys-sourceaccount](https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_condition-keys.html#condition-keys-sourceaccount) 全局条件密钥，该密钥将限制您为 Amazon EMR 授予的、针对您账户中特定资源的权限。使用这些策略可以防止[混淆代理问题](https://docs.aws.amazon.com/IAM/latest/UserGuide/confused-deputy.html)。

------
#### [ JSON ]

****  

```
{
  "Version":"2012-10-17",		 	 	 
  "Statement": [
    {
      "Sid": "AllowSTSAssumerole",
      "Effect": "Allow",
      "Action": [
        "sts:AssumeRole"
      ],
      "Resource": "arn:aws:iam::123456789012:role/EMRServiceRole",
      "Condition": {
        "StringEquals": {
          "aws:SourceAccount": "123456789012"
        },
        "ArnLike": {
          "aws:SourceArn": "arn:aws:elasticmapreduce:*:123456789012:*"
        }
      }
    }
  ]
}
```

------