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：
apiVersionv1 kindConfigMap metadata nameprometheus-config namespacekube-system labels kubernetes.io/cluster-service"true" addonmanager.kubernetes.io/modeEnsureExists 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/tokenjob_namekubernetes-nodes-kubelet kubernetes_sd_configsrolenode relabel_configsactionlabelmap regex__meta_kubernetes_node_label_(.+) schemehttps tls_config ca_file/var/run/secrets/kubernetes.io/serviceaccount/ca.crt insecure_skip_verifytrue bearer_token_file/var/run/secrets/kubernetes.io/serviceaccount/token job_namekubernetes-nodes-cadvisor kubernetes_sd_configsrolenode relabel_configsactionlabelmap regex__meta_kubernetes_node_label_(.+) target_label__metrics_path__ replacement/metrics/cadvisor schemehttps tls_config ca_file/var/run/secrets/kubernetes.io/serviceaccount/ca.crt insecure_skip_verifytrue bearer_token_file/var/run/secrets/kubernetes.io/serviceaccount/token job_namekubernetes-service-endpoints kubernetes_sd_configsroleendpoints relabel_configsactionkeep regextrue source_labels__meta_kubernetes_service_annotation_prometheus_io_scrape actionreplace regex(https?) source_labels__meta_kubernetes_service_annotation_prometheus_io_scheme target_label__scheme__ actionreplace regex(.+) source_labels__meta_kubernetes_service_annotation_prometheus_io_path target_label__metrics_path__ actionreplace regex(^+)(?\d+)?;(\d+) replacement$1$2 source_labels__address__ __meta_kubernetes_service_annotation_prometheus_io_port target_label__address__ actionlabelmap regex__meta_kubernetes_service_label_(.+) actionreplace source_labels__meta_kubernetes_namespace target_labelkubernetes_namespace actionreplace source_labels__meta_kubernetes_service_name target_labelkubernetes_name job_namekubernetes-services kubernetes_sd_configsroleservice metrics_path/probe params modulehttp_2xx relabel_configsactionkeep regextrue source_labels__meta_kubernetes_service_annotation_prometheus_io_probe source_labels__address__ target_label__param_target replacementblackbox target_label__address__ source_labels__param_target target_labelinstance actionlabelmap regex__meta_kubernetes_service_label_(.+) source_labels__meta_kubernetes_namespace target_labelkubernetes_namespace source_labels__meta_kubernetes_service_name target_labelkubernetes_name job_namekubernetes-pods kubernetes_sd_configsrolepod relabel_configsactionkeep regextrue source_labels__meta_kubernetes_pod_annotation_prometheus_io_scrape actionreplace regex(.+) source_labels__meta_kubernetes_pod_annotation_prometheus_io_path target_label__metrics_path__ actionreplace regex(^+)(?\d+)?;(\d+) replacement$1$2 source_labels__address__ __meta_kubernetes_pod_annotation_prometheus_io_port target_label__address__ actionlabelmap regex__meta_kubernetes_pod_label_(.+) actionreplace source_labels__meta_kubernetes_namespace target_labelkubernetes_namespace actionreplace source_labels__meta_kubernetes_pod_name target_labelkubernetes_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
打开prometheus的控制台
