ingress-nginx默认是没有开启监控指标的，需要我们在ingress-nginx controller的svc里面开启10254端口来暴露监控指标 然后进行抓取

ps：kubeadm方式和二进制方式部署的k8s集群都可以用此配置监控Ingress-Ningx Controller

一、prometheus中添加ingress-nginx的服务发现配置

prometheus部署链接：https://blog.csdn.net/qq_44930876/article/details/138163947

    - job_name: 'kubernetes-ingress-controller'
      kubernetes_sd_configs:
      - role: endpoints
      relabel_configs:
      - action: keep
        regex: ingress-nginx;ingress-nginx-controller;metrics
        source_labels:
        - __meta_kubernetes_namespace
        - __meta_kubernetes_service_name
        - __meta_kubernetes_endpoint_port_name
      scheme: http

二、ingress-nginx controller的service添加端口暴露监控指标

apiVersion: v1
kind: Service
...
spec:
  ports:
  - appProtocol: http
    name: http
    port: 80
    protocol: TCP
    targetPort: http
  - appProtocol: https
    name: https
    port: 443
    protocol: TCP
    targetPort: https
  - name: metrics
    port: 10254
    targetPort: 10254
    ...

然后重新apply一下使其ingress-controller生效

完成开启10254端口后就可以在prometheus上看到监控的ingress-nginx目标了

三、grafana添加ingress-nginx controller的监控模版

grafana模版中心ingress-nginx监控模版：https://grafana.com/grafana/dashboards/20275-ingress-nginx-dashboard/

或者直接使用我下载好的：
https://download.csdn.net/download/qq_44930876/89871863

或者直接导入 grafana模版中心的ingress-nginx controller监控模板ID：20275

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