我使用 AWS CloudFormation 或 AWS 命令行界面(AWS CLI)在 Amazon CloudWatch 中创建了一个金丝雀。我想知道为什么这个金丝雀在一段时间后会自动停止运行。
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。