使用Prometheus监控自定义kubernetes pod指标 [英] Monitor custom kubernetes pod metrics using Prometheus

问题描述

我正在使用Prometheus监视我的Kubernetes集群.我在单独的命名空间中设置了Prometheus.我有多个名称空间，并且有多个Pod正在运行.每个容器容器在此终点:80/data/metrics处公开自定义指标.我正在获取Pods CPU，内存指标等，但是如何配置Prometheus从每个可用Pod中的:80/data/metrics中提取数据?我已使用本教程来设置Prometheus，链接

I am using Prometheus to monitor my Kubernetes cluster. I have set up Prometheus in a separate namespace. I have multiple namespaces and multiple pods are running. Each pod container exposes a custom metrics at this end point, :80/data/metrics . I am getting the Pods CPU, memory metrics etc, but how to configure Prometheus to pull data from :80/data/metrics in each available pod ? I have used this tutorial to set up Prometheus, Link

推荐答案

您必须将这三个注释添加到您的广告连播中:

You have to add this three annotation to your pods:

prometheus.io/scrape: 'true'
prometheus.io/path: '/data/metrics'
prometheus.io/port: '80'

它将如何工作?

查看您用于配置Prometheus的config-map.yaml的kubernetes-pods作业，

Look at the kubernetes-pods job of config-map.yaml you are using to configure prometheus,

- job_name: 'kubernetes-pods'

        kubernetes_sd_configs:
        - role: pod

        relabel_configs:
        - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scrape]
          action: keep
          regex: true
        - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_path]
          action: replace
          target_label: __metrics_path__
          regex: (.+)
        - source_labels: [__address__, __meta_kubernetes_pod_annotation_prometheus_io_port]
          action: replace
          regex: ([^:]+)(?::\d+)?;(\d+)
          replacement: $1:$2
          target_label: __address__
        - action: labelmap
          regex: __meta_kubernetes_pod_label_(.+)
        - source_labels: [__meta_kubernetes_namespace]
          action: replace
          target_label: kubernetes_namespace
        - source_labels: [__meta_kubernetes_pod_name]
          action: replace
          target_label: kubernetes_pod_name

检查这三个重新标记的配置

Check this three relabel configuration

- source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scrape]
    action: keep
    regex: true
- source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_path]
    action: replace
    target_label: __metrics_path__
    regex: (.+)
- source_labels: [__address__, __meta_kubernetes_pod_annotation_prometheus_io_port]
    action: replace
    regex: ([^:]+)(?::\d+)?;(\d+)
    replacement: $1:$2
    target_label: __address__

此处，__metrics_path__和port，以及是否从该窗格中删除指标，正在从窗格注释中读取.

Here, __metrics_path__ and port and whether to scrap metrics from this pod are being read from pod annotations.

有关如何配置Prometheus的更多详细信息，请参见此处.

For, more details on how to configure Prometheus see here.

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