Amazon cloudformation 仅使用托管云信息策略创建IAM角色

我正在尝试使用现有管理策略创建IAM角色：

"SomeRole": 
        {
            "Type": "AWS::IAM::Role",
            "Properties": 
            {
                "AssumeRolePolicyDocument": {},
                "ManagedPolicyArns": 
                [
                    "arn:aws:iam::aws:policy/AmazonKinesisReadOnlyAccess",
                    "arn:aws:iam::aws:policy/AmazonDynamoDBFullAccess",
                    "arn:aws:iam::aws:policy/CloudWatchFullAccess"
                ],

                "RoleName": "SomeRole"
            }
        },

---

但是它失败了，出现了错误：位置（1,3）的语法错误看起来您必须在

assumerepolicyDocument中有一些值

试试这个

{
  "Resources": {
    "NewRole": {
      "Type": "AWS::IAM::Role",
      "Properties": {
        "AssumeRolePolicyDocument": {
          "Version": "2012-10-17",
          "Statement": [
            {
              "Effect": "Allow",
              "Principal": {
                "Service": [
                  "ec2.amazonaws.com"
                ]
              },
              "Action": [
                "sts:AssumeRole"
              ]
            }
          ]
        },
        "ManagedPolicyArns": [
          "arn:aws:iam::aws:policy/AmazonKinesisReadOnlyAccess",
          "arn:aws:iam::aws:policy/AmazonDynamoDBFullAccess",
          "arn:aws:iam::aws:policy/CloudWatchFullAccess"
        ]
      }
    }
  }
}

你能提供剩下的模板吗？你能通过JSON linter运行你的模板吗？成功了，泰。有时我真的很痛苦。