具有范围的 Prometheus 直方图桶

Question

我有一个基本直方图可以测量一些虚拟持续时间：

    Histogram histogram = Histogram.build().name(name).help((String) metricData.get(HELP)).register(registry);

    Histogram.Timer timer = histogram.startTimer();
    logger.info("Sleeps for 1 milli");
    Thread.sleep(1);
    histogram.observe(timer.observeDuration());

我的 Prometheus 直方图如下所示：

HELP myJob_histogram_no_buckets_test histogram with some info about something
TYPE myJob_histogram_no_buckets_test histogram
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="0.005"} 2
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="0.01"} 2
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="0.025"} 2
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="0.05"} 2
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="0.075"} 2
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="0.1"} 2
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="0.25"} 2
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="0.5"} 2
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="0.75"} 2
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="1"} 2
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="2.5"} 2
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="5"} 2
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="7.5"} 2
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="10"} 2
myJob_histogram_no_buckets_test_bucket{instance="",job="myJob",le="+Inf"} 2
myJob_histogram_no_buckets_test_sum{instance="",job="latrodectus"} 0.006341000000000001
myJob_histogram_no_buckets_test_count{instance="",job="latrodectus"} 2

我明白为什么我所有的桶值都增加了，但我不明白两件事：

我期望值是 1，我在源代码中做错了什么？为什么所有值都是 2？
如何将存储桶设置为使用范围，而不是 <=？

我看到了这个但是我不明白解决方案

提前致谢！

Answer 1

I expected the values to be 1, what am I doing wrong in my source code? why all values are 2?

您观察了两次。如果您使用 observeDuration，则不需要 observe.

How can I set the buckets to use ranges, instead of <=?

你不能，这就是 histogram_quantile 期望桶的样子。

Answer 2

我认为实现此目的的一种方法是通过正则表达式。例如，

le=~"([1-9]+)\..*"

将为您提供所有大于 0.9999 的值

具有范围的 Prometheus 直方图桶

Prometheus histogram buckets with ranges

prometheus

prometheus-java