如何为普罗米修斯操作员创建ServiceMonitor？ [英] How to create a ServiceMonitor for prometheus-operator?

问题描述

最近，普罗米修斯算子被提升为稳定舵图(https://github.com/helm/charts/tree/master/stable/prometheus-operator)。

我想了解如何在K8S集群中通过Prometheus-OPERATOR添加自定义应用程序进行监控。举个例子，比如GitLab Runner，它默认提供9252的指标(https://docs.gitlab.com/runner/monitoring/#configuration-of-the-metrics-http-server)。

我有一个基本的YAML，它显然不起作用，但也没有提供任何关于哪些不起作用的反馈：

apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: gitlab-monitor
  # Change this to the namespace the Prometheus instance is running in
  namespace: default
  labels:
    app: gitlab-runner-gitlab-runner
    release: prometheus
spec:
  selector:
    matchLabels:
      app: gitlab-runner-gitlab-runner
  namespaceSelector:
    # matchNames:
    # - default
    any: true
  endpoints:
  - port: http-metrics
    interval: 15s

这是普罗米修斯配置：

> kubectl get prometheus -o yaml

...
serviceMonitorNamespaceSelector: {}
serviceMonitorSelector:
  matchLabels:
    release: prometheus
...

所以选择器应该匹配。我所说的"不工作"是指端点不会出现在普罗米修斯的用户界面中。

推荐答案

多亏了Peter，他告诉我这个想法在原则上并不完全正确，我找到了缺失的环节。由于servicemonitor确实监控服务(哈哈)，我错过了创建一个不属于GitLab掌舵图的服务的部分。最后，这个YAML帮了我的忙，指标显示在普罗米修斯中：

# Service targeting gitlab instances
apiVersion: v1
kind: Service
metadata:
  name: gitlab-metrics
  labels:
    app: gitlab-runner-gitlab-runner
spec:
  ports:
  - name: metrics # expose metrics port
    port: 9252 # defined in gitlab chart
    targetPort: metrics
    protocol: TCP
  selector:
    app: gitlab-runner-gitlab-runner # target gitlab pods
---
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  name: gitlab-metrics-servicemonitor
  # Change this to the namespace the Prometheus instance is running in
  # namespace: default
  labels:
    app: gitlab-runner-gitlab-runner
    release: prometheus
spec:
  selector:
    matchLabels:
      app: gitlab-runner-gitlab-runner # target gitlab service
  endpoints:
  - port: metrics
    interval: 15s

很高兴知道：metricstargetPort在GitLab跑步者图表中定义。

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