上次更新时间：2020 年 10 月 13 日
我使用 AWS CloudFormation 或 AWS 命令行界面 (AWS CLI) 在 Amazon CloudWatch 中创建了一个 Canary。Canary 在一段时间后自动停止运行。该如何排查此问题？
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，则使用默认值 0。
要查看 Canary 的“DurationInSeconds”参数值，请运行 Amazon CloudWatch Synthetics GetCanary API：
aws synthetics get-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：在该响应中，“DurationInSeconds”不等于 0。
如果“DurationInSeconds”值与您期望的持续时间不符，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。
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": {
"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。</p