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设备注册Enrich活动

的 deviceRegistryEnrich 活动使您能够从 AWS IoT 设备注册到您的消息有效负载。例如，给定了以下 消息：

{
    "temp": 50,
    "hum": 40,
    "device" {
        "thingName": "my-thing"
    }
}

和类似下面这样的 deviceRegistryEnrich 活动：

{
    "deviceRegistryEnrich": {
        "name": "MyDeviceRegistryEnrichActivity",
        "attribute": "metadata",
        "thingName": "device.thingName",
        "roleArn": "arn:aws:iam::<your-account-number>:role:MyEnrichRole",
        "next": "MyDatastoreActivity"
    }
}

输出消息现在看起来像此示例。

{
    "temp" : 50,
    "hum" : 40,
    "device" {
        "thingName" : "my-thing"
    },
    "metadata" : {
        "defaultClientId": "my-thing",
        "thingTypeName": "my-thing",
        "thingArn": "arn:aws:iot:us-east-1:<your-account-number>:thing/my-thing",
        "version": 1,
        "thingName": "my-thing",
        "attributes": {},
        "thingId": "aaabbbccc-dddeeef-gghh-jjkk-llmmnnoopp"
    }
}

您必须在活动定义的 roleArn 字段中指定已附加适当权限的角色。该角色必须具有权限策略,看起来像以下示例。

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "iot:DescribeThing"
            ],
            "Resource": [
                "arn:aws:iot:<region>:<account-id>:thing/<thing-name>"
            ]
        }
    ]
}

和类似如下的信任策略：

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Sid": "",
            "Effect": "Allow",
            "Principal": {
                "Service": "iotanalytics.amazonaws.com"
            },
            "Action": [
                "sts:AssumeRole"
            ]
        }
    ]
}