为什么我的 CloudWatch Canary 会停止运行？

解决方法

**注意：**如果在运行 AWS CLI 命令时收到错误，请确保您使用的是最新版本的 AWS CLI。

如果 CloudWatch Canary 停止运行，请检查您在创建 Canary 时设置的“DurationInSeconds”值。该值指定 Canary 根据“Expression”值中的计划持续进行常规运行的时长（以秒为单位）。如果指定 0，Canary 将一直运行到您将其停止为止。如果省略此字段，则将使用默认值 0。

若要查看 Canary 的“DurationInSeconds”参数，请运行 Amazon CloudWatch Synthetics GetCanary API：

aws synthetics  get-canary --name [canary_name]

在输出中查看“DurationInSeconds”的值：

{
    "Canary": {
        "Id": "a1495b85-1c60-4f29-92c1-540f62fa34e3",
        "Name": "canary_name",
        "Code": {
            "SourceLocationArn": "arn:aws:lambda:eu-west-1:YourAccount:layer:cwsyn-canary_name-a1495b85-1c60-4f29-92c1-540f62fa34e3:1",
            "Handler": "CanaryFunction.handler"
        },
        "ExecutionRoleArn": "arn:aws:iam::YourAccount:role/CanaryRoleName",
        "Schedule": {
            "Expression": "rate(2 minutes)",
            "DurationInSeconds": 360
        },
        "RunConfig": {
            "TimeoutInSeconds": 120
        },
        "SuccessRetentionPeriodInDays": 31,
        "FailureRetentionPeriodInDays": 31,
        "Status": {
            "State": "READY"
        },
        "Timeline": {
            "Created": 1594481063.96,
            "LastModified": 1594481063.96
        },
        "ArtifactS3Location": "S3_Bucket_for_artifacts",
        "EngineArn": "arn:aws:lambda:eu-west-1:YourAccount:function:cwsyn-canary_name-a1495b85-1c60-4f29-92c1-540f62fa34e3:1",
        "RuntimeVersion": "syn-1.0",
        "Tags": {}
    }
}

**注意：**在响应中，“DurationInSeconds”不等于 0。

如果“DurationInSeconds”值与您的预期持续时间不符，请运行 CloudWatch Synthetics UpdateCanary API：

aws synthetics  update-canary --name canary_cli --schedule Expression="rate(2 minutes)",DurationInSeconds=0

**注意：**要使 Canary 持续运行，您必须编写“DurationInSeconds”设置为 0 的计划表达式。

若要验证您的更改，请使用 AWS CLI 运行 CloudWatch Synthetics get-canary 命令：

aws synthetics  get-canary --name [canary_name]


{
    "Canary": {
        "Id": "a1495b85-1c60-4f29-92c1-540f62fa34e3",
        "Name": "canary_name",
        "Code": {
            "SourceLocationArn": "arn:aws:lambda:eu-west-1:YourAccount:layer:cwsyn-canary_name-a1495b85-1c60-4f29-92c1-540f62fa34e3:1",
            "Handler": "CanaryFunction.handler"
        },
        "ExecutionRoleArn": "arn:aws:iam::YourAccount:role/CanaryRoleName",
        "Schedule": {
            "Expression": "rate(2 minutes)",
            "DurationInSeconds": 0
        },
        "RunConfig": {
            "TimeoutInSeconds": 120
        },
        "SuccessRetentionPeriodInDays": 31,
        "FailureRetentionPeriodInDays": 31,
        "Status": {
            "State": "READY"
        },
        "Timeline": {
            "Created": 1594481063.96,
            "LastModified": 1594481063.96
        },
        "ArtifactS3Location": "S3_Bucket_for_artifacts",
        "EngineArn": "arn:aws:lambda:eu-west-1:YourAccount:function:cwsyn-canary_name-a1495b85-1c60-4f29-92c1-540f62fa34e3:1",
        "RuntimeVersion": "syn-1.0",
        "Tags": {}
    }
}

在输出中确认“DurationInSeconds”的值为 0。

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