# 安装kube-prometheus https://developer.aliyun.com/article/1380334 ``` kube-promethues 本质就是以下内容的集合： * [Prometheus Operator](https://github.com/prometheus-operator/prometheus-operator) * [Prometheus](https://prometheus.io/) * [Alertmanager](https://github.com/prometheus/alertmanager) * [node-exporter](https://github.com/prometheus/node_exporter) * [Prometheus Adapter for Kubernetes Metrics APIs](https://github.com/DirectXMan12/k8s-prometheus-adapter) * [kube-state-metrics](https://github.com/kubernetes/kube-state-metrics) * [Grafana](https://grafana.com/) ``` # helm安装各种exporter https://github.com/prometheus-community/helm-charts/tree/main/charts Node-Exporter 不支持进程监控，可以加一个Process-Exporter # helm 安装 prometheus 参考:https://artifacthub.io/packages/helm/prometheus-community/prometheus 参考:https://github.com/prometheus-community/helm-charts/tree/main/charts 前提：已有k8s环境 helm repo add prometheus-community https://prometheus-community.github.io/helm-charts helm repo update helm search repo | grep prometheus helm install prometheus prometheus-community/prometheus --namespace monitoring helm uninstall prometheus --namespace monitoring # 安装版本为2.31.1 # 修改存储卷为本地存储 ------------------------------------------------------------------------------------------------------------------------------------------------------ Prometheus 使用 kubernetes_sd_config 做服务发现，请求一般会经过集群的 Apiserver，随着规模的变大，**需要评估下对 Apiserver性能的影响，尤其是Proxy失败的时候**，会导致CPU 升高。 --- ## **在监控Cadvisor、Docker、Kube-Proxy 的 Metric 时，我们一开始选择从 Apiserver Proxy 到节点的对应端口，统一设置比较方便，但后来还是改为了直接拉取节点，Apiserver 仅做服务发现。** # 修改configmap的更新问题 kubectl edit cm -n monitoring prometheus-server 修改成功后，可能10来秒会自动更新 也可以使用reload立即更新 ``` root@k8s2-01:/home/ubuntu# kubectl get svc -n monitoring NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE prometheus-server ClusterIP 10.110.233.127 <none> 80/TCP 5d20h root@k8s2-01:/home/ubuntu# curl -X POST "http://10.110.233.127:80/-/reload" ``` # 配置ingress 参考：https://kubernetes.io/zh/docs/concepts/services-networking/ingress/ ``` root@k8s2-01:/home/ubuntu# kubectl get ingress -n monitoring prometheus-server -o yaml apiVersion: networking.k8s.io/v1 kind: Ingress metadata: annotations: name: prometheus-server namespace: monitoring spec: ingressClassName: nginx rules: - host: prometheus.51sw.cc http: paths: - backend: service: name: prometheus-server port: number: 80 path: / pathType: Prefix ```