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: / usr / lib / python2.7 / site-packages / awscli / examples / xray /
Filename : create-sampling-rule.rst
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**To create a sampling rule**

The following ``create-sampling-rule`` example creates a rule to control sampling behavior for instrumented applications. The rules are provided by a JSON file. The majority of the sampling rule fields are required to create the rule. ::

    aws xray create-sampling-rule \
        --cli-input-json file://9000-base-scorekeep.json

Contents of ``9000-base-scorekeep.json``::

    {
        "SamplingRule": {
            "RuleName": "base-scorekeep",
            "ResourceARN": "*",
            "Priority": 9000,
            "FixedRate": 0.1,
            "ReservoirSize": 5,
            "ServiceName": "Scorekeep",
            "ServiceType": "*",
            "Host": "*",
            "HTTPMethod": "*",
            "URLPath": "*",
            "Version": 1
        }
    }
  
Output::

    {
        "SamplingRuleRecord": {
            "SamplingRule": {
                "RuleName": "base-scorekeep",
                "RuleARN": "arn:aws:xray:us-west-2:123456789012:sampling-rule/base-scorekeep",
                "ResourceARN": "*",
                "Priority": 9000,
                "FixedRate": 0.1,
                "ReservoirSize": 5,
                "ServiceName": "Scorekeep",
                "ServiceType": "*",
                "Host": "*",
                "HTTPMethod": "*",
                "URLPath": "*",
                "Version": 1,
                "Attributes": {}
            },
            "CreatedAt": 1530574410.0,
            "ModifiedAt": 1530574410.0
        }
    }

For more information, see `Configuring Sampling, Groups, and Encryption Settings with the AWS X-Ray API <https://docs.aws.amazon.com/en_pv/xray/latest/devguide/xray-api-configuration.html#xray-api-configuration-sampling>`__ in the *AWS X-Ray Developer Guide*.