搜索

2.5. Setting up metrics collection

download PDF

To use the metrics exposed by your service, you must configure OpenShift Monitoring to scrape metrics from the /metrics endpoint. You can do this by using a ServiceMonitor custom resource definition (CRD) that specifies how to monitor a service or a PodMonitor CRD that specifies how to monitor a pod. The former requires a Service object, while the latter does not, which allows Prometheus to directly scrape metrics from the metrics endpoint exposed by a pod.

This procedure shows how to create a ServiceMonitor resource for the service.

Prerequisites

  • Log in as a cluster administrator or a user with the monitoring-edit role.

Procedure

  1. Create a YAML file for the ServiceMonitor resource configuration. In this example, the file is called example-app-service-monitor.yaml.
  2. Fill the file with the configuration for creating the ServiceMonitor resource:

    apiVersion: monitoring.coreos.com/v1
    kind: ServiceMonitor
    metadata:
      labels:
        k8s-app: prometheus-example-monitor
      name: prometheus-example-monitor
      namespace: ns1
    spec:
      endpoints:
      - interval: 30s
        port: web
        scheme: http
      selector:
        matchLabels:
          app: prometheus-example-app

    This configuration makes OpenShift Monitoring scrape the metrics exposed by the sample service deployed in "Deploying a sample service", which includes the single version metric.

  3. Apply the configuration file to the cluster:

    $ oc apply -f example-app-service-monitor.yaml

    It will take some time to deploy the ServiceMonitor resource.

  4. You can check that the ServiceMonitor resource is running:

    $ oc -n ns1 get servicemonitor

    Example output

    NAME                         AGE
    prometheus-example-monitor   81m

Additional resources

See the Prometheus Operator API documentation for more information on ServiceMonitor and PodMonitor resources.

Red Hat logoGithubRedditYoutubeTwitter

学习

尝试、购买和销售

社区

关于红帽文档

通过我们的产品和服务,以及可以信赖的内容,帮助红帽用户创新并实现他们的目标。

让开源更具包容性

红帽致力于替换我们的代码、文档和 Web 属性中存在问题的语言。欲了解更多详情,请参阅红帽博客.

關於紅帽

我们提供强化的解决方案,使企业能够更轻松地跨平台和环境(从核心数据中心到网络边缘)工作。

© 2024 Red Hat, Inc.