AWS CLI get-metric-statistics

问题描述

我正在尝试从我的ec2实例中请求CPUUtilization，并遵循此命令参考我正在使用以下命令

I'm trying to request the CPUUtilization from my ec2 instance and following this Command Reference i'm using the following command

aws cloudwatch get-metric-statistics --metric-name CPUUtilization --start-time 2016-08-08T22:48:00 --end-time 2016-08-08T22:53:00 --period 60 --namespace AWS/EC2 --statistics Maximum --dimensions Name=InstanceId,Value=i-myinstanceid

我的回答是:

{
    "Datapoints": [
        {
            "Timestamp": "2016-08-08T22:51:00Z",
            "Maximum": 0.17,
            "Unit": "Percent"
        }
    ],
    "Label": "CPUUtilization"
}

但是这不应该在1分钟内返回带有时间戳的数据点吗?

but shouldn't this return me Data Points with Timestamp within 1 minute?

推荐答案

无法从Amazon CloudWatch检索实际数据点.

It is not possible to retrieve actual data points from Amazon CloudWatch.

相反，CloudWatch在一段时间内提供了汇总指标(例如，平均值，采样计数，总和).

Instead, CloudWatch provides aggregated metrics over a period of time (eg Average, SampleCount, Sum).

从 CloudWatch文档:

但是，正如您所指出的，CloudWatch应该在给定的时间段内返回多个值.

However, as you point out, CloudWatch should be returning multiple values over the given time period.

我接受了您的命令，并针对我的一个实例运行了它.我发现，通过扩展时间范围，我可以返回多个值:

I took your command and ran it against one of my Instances. I found that, by extending the time range, I could get multiple values returned:

{
    "Datapoints": [
        {
            "Timestamp": "2016-08-08T22:52:00Z", 
            "Maximum": 0.0, 
            "Unit": "Percent"
        }, 
        {
            "Timestamp": "2016-08-08T22:47:00Z", 
            "Maximum": 0.17, 
            "Unit": "Percent"
        }, 
        {
            "Timestamp": "2016-08-08T22:42:00Z", 
            "Maximum": 0.16, 
            "Unit": "Percent"
        }, 
        {
            "Timestamp": "2016-08-08T22:37:00Z", 
            "Maximum": 0.17, 
            "Unit": "Percent"
        }
    ], 
    "Label": "CPUUtilization"
}

请注意，我的数据点仅每5分钟返回一次.这是因为对Amazon EC2实例的标准监视仅每5分钟捕获一次指标.要每隔1分钟获取一次指标，您需要启用详细监控. (需要支付额外费用.)

Notice that my data points were coming back only every 5 minutes. This is because standard monitoring of Amazon EC2 instances only captures metrics every 5 minutes. To obtain metrics at 1-minute intervals, you will need to Enable Detailed Monitoring. (Additional charges apply.)

这篇关于AWS CLI get-metric-statistics的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！