使用Prometheus监控自定义kubernetes pod指标

Question

我正在使用Prometheus来监控我的库伯内特斯集群。我在一个单独的命名空间中设置了Prometheus。我有多个命名空间和多个pod正在运行。每个pod容器在此终端公开一个自定义指标，： 80/data/metrics。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？我使用本教程设置了Prometheus、Link

Answer 1

问题中提供的链接引用了prometheus配置的此ConfigMap。如果使用了ConfigMap，那么普罗米修斯已经配置好刮豆荚了。

对于该配置（请参阅relabel\u configs），让普罗米修斯在以下位置清除pods公开的自定义度量：80/数据/度量，请将这些注释添加到pods部署配置中：

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

有关抓取https等相关设置，请参阅prometheus文档中的库伯内特斯发现配置选项（向下滚动）。

编辑：我是在发布我的答案后才看到埃姆鲁兹·侯赛因的答案的。他的答案目前缺少普罗米修斯的答案。io/scrape：“true”注释，并指定为注释的名称/值分隔符，而不是在yaml或json中无效的注释的名称/值分隔符。

Answer 2

您必须将这三个注释添加到播客中：

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，

- 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配置

- 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__

这里，正在从pod注释中读取\uuuMetrics\u path\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu。

有关如何配置普罗米修斯的更多详细信息，请参见此处。