最近的值或上次看到的值 [英] Most recent value or last seen value

问题描述

Prometheus 是围绕返回指标的时间序列表示而构建的.然而，在许多情况下，我只关心指标的现在状态，而且我很难找到一种可靠的方法来获得一个指标的最新"值.指标.

Prometheus is built around returning a time series representation of metrics. In many cases, however, I only care about what the state of a metric is right now, and I'm having a hard time figuring out a reliable way to get the "most recent" value of a metric.

因为现在它每 30 秒获取一次指标，我尝试了这样的操作:

Since right now it's getting metrics every 30 seconds, I tried something like this:

my_metric[30s]

但这感觉很脆弱.如果指标在数据点之间的日期超过或少于 30 秒，那么我要么得到一个以上的结果，要么返回零个结果.

But this feels fragile. If metrics are dated any more or less than 30 seconds between data points, then I either get back more than one or zero results.

如何获取指标的最新值?

How can I get the most recent value of a metric?

推荐答案

您只需要 my_metric，它会默认返回不超过 5 分钟的最新值.

All you need is my_metric, which will by default return the most recent value no more than 5 minutes old.

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