环境介绍
# 关于k8s的集群部署，可以查看我其他博客 [root@master ~]# cat /etc/redhat-release CentOS Linux release 7.6.1810 (Core) [root@master ~]# uname -r 4.4.235-1.el7.elrepo.x86_64 [root@master grafana]# docker --version Docker version 19.03.8, build afacb8b7f0 [root@master ~]# kubectl get nodes NAME STATUS ROLES AGE VERSION 192.168.131.150 Ready,SchedulingDisabled master 53m v1.18.3 192.168.131.151 Ready node 52m v1.18.3 192.168.131.152 Ready node 52m v1.18.3
[root@master ~]# cd /etc/kubernetes/ [root@master kubernetes]# ls [root@master kubernetes]# mkdir prometheusGrafana [root@master kubernetes]# cd prometheusGrafana/
创建node-exporter
[root@master prometheusGrafana]# cat node-exporter.yaml --- apiVersion: apps/v1 kind: DaemonSet metadata: name: node-exporter namespace: kube-system labels: k8s-app: node-exporter spec: selector: matchLabels: k8s-app: node-exporter template: metadata: labels: k8s-app: node-exporter spec: containers: - image: prom/node-exporter name: node-exporter ports: - containerPort: 9100 protocol: TCP name: http --- apiVersion: v1 kind: Service metadata: labels: k8s-app: node-exporter name: node-exporter namespace: kube-system spec: ports: - name: http port: 9100 nodePort: 31672 protocol: TCP type: NodePort selector: k8s-app: node-exporter
[root@master prometheusGrafana]# kubectl label nodes 192.168.131.151 k8s-app=node-exporter node/192.168.131.151 labeled [root@master prometheusGrafana]# kubectl apply -f node-exporter.yaml daemonset.apps/node-exporter created service/node-exporter created
创建Prometheus
[root@master prometheusGrafana]# mkdir ./{prometheus,grafana} [root@master prometheusGrafana]# cd prometheus/ [root@master prometheus]# ls configmap.yaml prometheus.deploy.yaml prometheus.svc.yaml rbac-setup.yaml
[root@master prometheus]# cat configmap.yaml apiVersion: v1 kind: ConfigMap metadata: name: prometheus-config namespace: kube-system data: prometheus.yml: | global: scrape_interval: 15s evaluation_interval: 15s scrape_configs: - job_name: 'kubernetes-apiservers' kubernetes_sd_configs: - role: endpoints scheme: https tls_config: ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token relabel_configs: - source_labels: [__meta_kubernetes_namespace, __meta_kubernetes_service_name, __meta_kubernetes_endpoint_port_name] action: keep regex: default;kubernetes;https - job_name: 'kubernetes-nodes' kubernetes_sd_configs: - role: node scheme: https tls_config: ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token relabel_configs: - action: labelmap regex: __meta_kubernetes_node_label_(.+) - target_label: __address__ replacement: kubernetes.default.svc:443 - source_labels: [__meta_kubernetes_node_name] regex: (.+) target_label: __metrics_path__ replacement: /api/v1/nodes/${1}/proxy/metrics - job_name: 'kubernetes-cadvisor' kubernetes_sd_configs: - role: node scheme: https tls_config: ca_file: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token relabel_configs: - action: labelmap regex: __meta_kubernetes_node_label_(.+) - target_label: __address__ replacement: kubernetes.default.svc:443 - source_labels: [__meta_kubernetes_node_name] regex: (.+) target_label: __metrics_path__ replacement: /api/v1/nodes/${1}/proxy/metrics/cadvisor - job_name: 'kubernetes-service-endpoints' kubernetes_sd_configs: - role: endpoints relabel_configs: - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scrape] action: keep regex: true - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_scheme] action: replace target_label: __scheme__ regex: (https?) - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_path] action: replace target_label: __metrics_path__ regex: (.+) - source_labels: [__address__, __meta_kubernetes_service_annotation_prometheus_io_port] action: replace target_label: __address__ regex: ([^:]+)(?::\d+)?;(\d+) replacement: $1:$2 - action: labelmap regex: __meta_kubernetes_service_label_(.+) - source_labels: [__meta_kubernetes_namespace] action: replace target_label: kubernetes_namespace - source_labels: [__meta_kubernetes_service_name] action: replace target_label: kubernetes_name - job_name: 'kubernetes-services' kubernetes_sd_configs: - role: service metrics_path: /probe params: module: [http_2xx] relabel_configs: - source_labels: [__meta_kubernetes_service_annotation_prometheus_io_probe] action: keep regex: true - source_labels: [__address__] target_label: __param_target - target_label: __address__ replacement: blackbox-exporter.example.com:9115 - 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-ingresses' kubernetes_sd_configs: - role: ingress relabel_configs: - source_labels: [__meta_kubernetes_ingress_annotation_prometheus_io_probe] action: keep regex: true - source_labels: [__meta_kubernetes_ingress_scheme,__address__,__meta_kubernetes_ingress_path] regex: (.+);(.+);(.+) replacement: ${1}://${2}${3} target_label: __param_target - target_label: __address__ replacement: blackbox-exporter.example.com:9115 - source_labels: [__param_target] target_label: instance - action: labelmap regex: __meta_kubernetes_ingress_label_(.+) - source_labels: [__meta_kubernetes_namespace] target_label: kubernetes_namespace - source_labels: [__meta_kubernetes_ingress_name] target_label: kubernetes_name - job_name: 'kubernetes-pods' kubernetes_sd_configs: - role: pod relabel_configs: - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_scrape] action: keep regex: true - source_labels: [__meta_kubernetes_pod_annotation_prometheus_io_path] action: replace target_label: __metrics_path__ regex: (.+) - source_labels: [__address__, __meta_kubernetes_pod_annotation_prometheus_io_port] action: replace regex: ([^:]+)(?::\d+)?;(\d+) replacement: $1:$2 target_label: __address__ - action: labelmap regex: __meta_kubernetes_pod_label_(.+) - source_labels: [__meta_kubernetes_namespace] action: replace target_label: kubernetes_namespace - source_labels: [__meta_kubernetes_pod_name] action: replace target_label: kubernetes_pod_name
[root@master prometheus]# cat prometheus.deploy.yaml --- apiVersion: apps/v1 kind: Deployment metadata: labels: name: prometheus-deployment name: prometheus namespace: kube-system spec: replicas: 1 selector: matchLabels: app: prometheus template: metadata: labels: app: prometheus spec: containers: - image: prom/prometheus:v2.0.0 name: prometheus command: - "/bin/prometheus" args: - "--config.file=/etc/prometheus/prometheus.yml" - "--storage.tsdb.path=/prometheus" - "--storage.tsdb.retention=24h" ports: - containerPort: 9090 protocol: TCP volumeMounts: - mountPath: "/prometheus" name: data - mountPath: "/etc/prometheus" name: config-volume resources: requests: cpu: 100m memory: 100Mi limits: cpu: 500m memory: 2500Mi serviceAccountName: prometheus volumes: - name: data emptyDir: {} - name: config-volume configMap: name: prometheus-config
[root@master prometheus]# cat prometheus.svc.yaml --- kind: Service apiVersion: v1 metadata: labels: app: prometheus name: prometheus namespace: kube-system spec: type: NodePort ports: - port: 9090 targetPort: 9090 nodePort: 30003 selector: app: prometheus
[root@master prometheus]# cat rbac-setup.yaml apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRole metadata: name: prometheus rules: - apiGroups: [""] resources: - nodes - nodes/proxy - services - endpoints - pods verbs: ["get", "list", "watch"] - apiGroups: - extensions resources: - ingresses verbs: ["get", "list", "watch"] - nonResourceURLs: ["/metrics"] verbs: ["get"] --- apiVersion: v1 kind: ServiceAccount metadata: name: prometheus namespace: kube-system --- apiVersion: rbac.authorization.k8s.io/v1 kind: ClusterRoleBinding metadata: name: prometheus roleRef: apiGroup: rbac.authorization.k8s.io kind: ClusterRole name: prometheus subjects: - kind: ServiceAccount name: prometheus namespace: kube-system
[root@master prometheus]# kubectl apply -f . configmap/prometheus-config created deployment.apps/prometheus created service/prometheus created clusterrole.rbac.authorization.k8s.io/prometheus created serviceaccount/prometheus created clusterrolebinding.rbac.authorization.k8s.io/prometheus created
创建Grafana
[root@master prometheus]# cd ../grafana/ [root@master grafana]# ls grafana-deploy.yaml grafana-ing.yaml grafana-svc.yaml [root@master grafana]# kubectl label nodes 192.168.131.151 app=grafana node/192.168.131.151 labeled
[root@master grafana]# cat grafana-deploy.yaml apiVersion: apps/v1 kind: Deployment metadata: name: grafana-core namespace: kube-system labels: app: grafana component: core spec: replicas: 2 selector: matchLabels: app: grafana template: metadata: labels: app: grafana component: core spec: containers: - image: grafana/grafana:4.2.0 name: grafana-core imagePullPolicy: IfNotPresent # env: resources: # keep request = limit to keep this container in guaranteed class limits: cpu: 100m memory: 100Mi requests: cpu: 100m memory: 100Mi env: # The following env variables set up basic auth twith the default admin user and admin password. - name: GF_AUTH_BASIC_ENABLED value: "true" - name: GF_AUTH_ANONYMOUS_ENABLED value: "false" # - name: GF_AUTH_ANONYMOUS_ORG_ROLE # value: Admin # does not really work, because of template variables in exported dashboards: # - name: GF_DASHBOARDS_JSON_ENABLED # value: "true" readinessProbe: httpGet: path: /login port: 3000 # initialDelaySeconds: 30 # timeoutSeconds: 1 volumeMounts: - name: grafana-persistent-storage mountPath: /var volumes: - name: grafana-persistent-storage emptyDir: {}
[root@master grafana]# cat grafana-ing.yaml apiVersion: extensions/v1beta1 kind: Ingress metadata: name: grafana namespace: kube-system spec: rules: - host: k8s.grafana http: paths: - path: / backend: serviceName: grafana servicePort: 3000
[root@master grafana]# cat grafana-svc.yaml apiVersion: v1 kind: Service metadata: name: grafana namespace: kube-system labels: app: grafana component: core spec: type: NodePort ports: - port: 3000 selector: app: grafana component: core
[root@master grafana]# kubectl apply -f . deployment.apps/grafana-core created ingress.extensions/grafana created service/grafana created
测试
[root@master prometheusGrafana]# kubectl get svc -A NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE default kubernetes ClusterIP 10.68.0.1 <none> 443/TCP 44m kube-system dashboard-metrics-scraper ClusterIP 10.68.145.87 <none> 8000/TCP 41m kube-system grafana NodePort 10.68.162.32 <none> 3000:26421/TCP 5m45s kube-system kube-dns ClusterIP 10.68.0.2 <none> 53/UDP,53/TCP,9153/TCP 41m kube-system kubernetes-dashboard NodePort 10.68.47.65 <none> 443:32507/TCP 41m kube-system metrics-server ClusterIP 10.68.127.89 <none> 443/TCP 41m kube-system node-exporter NodePort 10.68.108.115 <none> 9100:31672/TCP 26m kube-system prometheus NodePort 10.68.103.46 <none> 9090:30003/TCP 14m # 浏览器访问： http://192.168.131.150:31672 # 访问Metrics采集器 http://192.168.131.150:26421 # 访问grafana（默认用户名和密码都是admin） http://192.168.131.150:30003/targets # 访问Prometheus
