k8s集群监控（4）-部署node-exporter

2022-11-15 2460

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简介： 部署node-export ，监控节点基础监控，比如内存，IO，磁盘，CPU等

环境准备

系统Centos 7.9

k8s集群：

版本：1.21.5

节点：

192.168.10.201 master

192.168.10.202 work

在k8s集群每个节点上，部署node-export

此案例，只在192.168.10.201 master 节点上，安装了node-export，进行改节点的监控

脚本配置：

deploy-node-exporter.sh

#!/bin/bashwgethttps://github.com/prometheus/node_exporter/releases/download/v1.4.0/node_exporter-1.4.0.linux-amd64.tar.gztarzxfnode_exporter-1.4.0.linux-amd64.tar.gzmvnode_exporter-1.4.0.linux-amd64/usr/local/node_exportercat<<EOF>/usr/lib/systemd/system/node_exporter.service[Unit]Descrption=https://prometheus.io[Service]Restart=on-failureExecStart=/usr/local/node_exporter/node_exporter--collector.systemd.unit-whitelist=(docker|kubelet|kube-proxy|flanneld).service[Install]WantedBy=multi-user.targetEOFsystemctldaemon-reloadsystemctlenablenode_exportersystemctlrestartnode_exporter

执行脚本部署node-export

shdeploy-node-exporter.sh

在prometheus 的configmap中，设置对node-exporter 的监控配置

有关prometheus 的部署，请查看 prometheus部署这篇文章

在这篇文章的部署配置文件中，添加对部署的了node-export的节点

资源监控配置：

prometheus-configmap.yaml 完整配置：

apiVersion: v1
kind: ConfigMap
metadata:  name: prometheus-config
  namespace: kube-system
  labels:    kubernetes.io/cluster-service: "true"    addonmanager.kubernetes.io/mode: EnsureExists
data:  prometheus.yml: |    scrape_configs:    - job_name: prometheus      static_configs:      - targets:        - localhost:9090    - job_name: kubernetes-nodes      static_configs:      - targets: [192.168.10.201:9100]        labels:           node_name: k201    - job_name: kubernetes-apiservers      kubernetes_sd_configs:      - role: endpoints      relabel_configs:      - action: keep        regex: default;kubernetes;https        source_labels:        - __meta_kubernetes_namespace        - __meta_kubernetes_service_name        - __meta_kubernetes_endpoint_port_name      scheme: https      tls_config:        ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt        insecure_skip_verify: true      bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token    - job_name: kubernetes-nodes-kubelet
      kubernetes_sd_configs:      - role: node
      relabel_configs:      - action: labelmap
        regex: __meta_kubernetes_node_label_(.+)
      scheme: https
      tls_config:        ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
        insecure_skip_verify: true      bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
    - job_name: kubernetes-nodes-cadvisor
      kubernetes_sd_configs:      - role: node
      relabel_configs:      - action: labelmap
        regex: __meta_kubernetes_node_label_(.+)
      - target_label: __metrics_path__
        replacement: /metrics/cadvisor
      scheme: https
      tls_config:        ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
        insecure_skip_verify: true      bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
    - job_name: kubernetes-service-endpoints
      kubernetes_sd_configs:      - role: endpoints
      relabel_configs:      - action: keep
        regex: true        source_labels:        - __meta_kubernetes_service_annotation_prometheus_io_scrape
      - action: replace
        regex: (https?)
        source_labels:        - __meta_kubernetes_service_annotation_prometheus_io_scheme
        target_label: __scheme__
      - action: replace
        regex: (.+)
        source_labels:        - __meta_kubernetes_service_annotation_prometheus_io_path
        target_label: __metrics_path__
      - action: replace
        regex: ([^:]+)(?::\d+)?;(\d+)
        replacement: $1:$2
        source_labels:        - __address__
        - __meta_kubernetes_service_annotation_prometheus_io_port
        target_label: __address__
      - action: labelmap
        regex: __meta_kubernetes_service_label_(.+)
      - action: replace
        source_labels:        - __meta_kubernetes_namespace
        target_label: kubernetes_namespace
      - action: replace
        source_labels:        - __meta_kubernetes_service_name
        target_label: kubernetes_name
    - job_name: kubernetes-services
      kubernetes_sd_configs:      - role: service
      metrics_path: /probe
      params:        module:        - http_2xx
      relabel_configs:      - action: keep
        regex: true        source_labels:        - __meta_kubernetes_service_annotation_prometheus_io_probe
      - source_labels:        - __address__
        target_label: __param_target
      - replacement: blackbox
        target_label: __address__
      - source_labels:        - __param_target
        target_label: instance
      - action: labelmap
        regex: __meta_kubernetes_service_label_(.+)
      - source_labels:        - __meta_kubernetes_namespace
        target_label: kubernetes_namespace
      - source_labels:        - __meta_kubernetes_service_name
        target_label: kubernetes_name
    - job_name: kubernetes-pods
      kubernetes_sd_configs:      - role: pod
      relabel_configs:      - action: keep
        regex: true        source_labels:        - __meta_kubernetes_pod_annotation_prometheus_io_scrape
      - action: replace
        regex: (.+)
        source_labels:        - __meta_kubernetes_pod_annotation_prometheus_io_path
        target_label: __metrics_path__
      - action: replace
        regex: ([^:]+)(?::\d+)?;(\d+)
        replacement: $1:$2
        source_labels:        - __address__
        - __meta_kubernetes_pod_annotation_prometheus_io_port
        target_label: __address__
      - action: labelmap
        regex: __meta_kubernetes_pod_label_(.+)
      - action: replace
        source_labels:        - __meta_kubernetes_namespace
        target_label: kubernetes_namespace
      - action: replace
        source_labels:        - __meta_kubernetes_pod_name
        target_label: kubernetes_pod_name

重启prometheus 服务

执行一下命令进行prometheus服务重启：

kubectldelete-fprometheus-configmap.yamlkubectlapply-fprometheus-configmap.yaml

k8s集群监控（4）-部署node-exporter

环境准备

在k8s集群每个节点上，部署node-export

执行脚本部署node-export

在prometheus 的configmap中，设置对node-exporter 的监控配置

重启prometheus 服务

打开prometheus的控制台

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