为什么我的 CloudWatch 金丝雀停止运行了？

解决方案

**注意：**如果在运行 AWS 命令行界面（AWS CLI）命令时收到错误，请参阅 Troubleshoot AWS CLI errors。此外，请确保您使用的是最新版本的 AWS CLI。

如果您的 CloudWatch 金丝雀停止运行，请检查您在创建金丝雀时设置的 DurationInSeconds 值。该值指定金丝雀根据 Expression 值中的时间表定期运行时，持续运行的时间长度。时间长度以秒为单位。如果您指定 0，则金丝雀会持续运行，直到您停止金丝雀为止。如果您未设置 DurationInSeconds 值，则默认值将设置为 0。

要查看金丝雀的 DurationInSeconds 参数值，请运行 CloudWatch Synthetics GetCanary API：

aws synthetics  get-canary --name [canary_name]

在以下输出中，检查 DurationInSeconds 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：**在前面的输出中，DurationInSeconds 不等于 0。

如果 DurationInSeconds 值与您的预期持续时间不匹配，请运行以下 CloudWatch Synthetics UpdateCanary API：

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

注意：要使金丝雀持续运行，必须编写将 DurationInSeconds 设置为 0 的计划表达式。

要验证您的更改是否已经生效，请使用 AWS CLI 运行 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 值为 0。