前言
Kubernetes 是一款开源的容器编排系统,可以帮助用户管理容器化应用程序。而 Prometheus 则是一款开源的监控系统,可以帮助用户监控各种系统和服务。在 Kubernetes 集群中使用 Prometheus 监控系统,可以帮助用户更好地管理和维护 Kubernetes 集群,保证其高可用性和可靠性。本文将介绍如何在 Kubernetes 集群中使用 Prometheus 监控系统。
准备工作
在开始之前,我们需要先准备好以下工具和环境:
- Kubernetes 集群
- Prometheus 监控系统
kube-state-metrics
和node-exporter
组件
部署组件
首先,我们需要部署 kube-state-metrics
和 node-exporter
组件。这两个组件可以帮助我们收集 Kubernetes 集群的状态和节点信息。
部署 kube-state-metrics
kube-state-metrics
是一款开源的 Kubernetes 组件,可以帮助我们收集 Kubernetes 集群的状态信息。我们可以使用以下命令来部署 kube-state-metrics
:
// javascriptcn.com 代码示例 apiVersion: apps/v1 kind: Deployment metadata: name: kube-state-metrics namespace: kube-system spec: replicas: 1 selector: matchLabels: app: kube-state-metrics template: metadata: labels: app: kube-state-metrics spec: containers: - name: kube-state-metrics image: quay.io/coreos/kube-state-metrics:v1.9.7 ports: - name: http-metrics containerPort: 8080
部署 node-exporter
node-exporter
是一款开源的 Prometheus 组件,可以帮助我们收集节点信息。我们可以使用以下命令来部署 node-exporter
:
// javascriptcn.com 代码示例 apiVersion: apps/v1 kind: DaemonSet metadata: name: node-exporter namespace: kube-system spec: selector: matchLabels: app: node-exporter template: metadata: labels: app: node-exporter spec: containers: - name: node-exporter image: prom/node-exporter:v1.2.2 ports: - name: http-metrics containerPort: 9100 volumeMounts: - name: rootfs mountPath: /host/root readOnly: true args: - --path.rootfs=/host/root volumes: - name: rootfs hostPath: path: /
配置 Prometheus
在部署完组件后,我们需要配置 Prometheus 来收集和存储数据。我们可以使用以下命令来创建一个 Prometheus 配置文件:
// javascriptcn.com 代码示例 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 cert_file: /var/run/secrets/kubernetes.io/serviceaccount/client.crt key_file: /var/run/secrets/kubernetes.io/serviceaccount/client.key 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 cert_file: /var/run/secrets/kubernetes.io/serviceaccount/client.crt key_file: /var/run/secrets/kubernetes.io/serviceaccount/client.key bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token relabel_configs: - source_labels: [__meta_kubernetes_node_name] action: replace target_label: instance - job_name: 'node-exporter' kubernetes_sd_configs: - role: node relabel_configs: - source_labels: [__meta_kubernetes_node_name] action: replace target_label: instance static_configs: - targets: ['localhost:9100']
部署 Prometheus
在配置完 Prometheus 后,我们可以使用以下命令来部署 Prometheus:
// javascriptcn.com 代码示例 apiVersion: v1 kind: Service metadata: name: prometheus namespace: kube-system labels: app: prometheus spec: selector: app: prometheus ports: - name: web port: 9090 targetPort: 9090 protocol: TCP --- apiVersion: apps/v1 kind: Deployment metadata: name: prometheus namespace: kube-system spec: replicas: 1 selector: matchLabels: app: prometheus template: metadata: labels: app: prometheus spec: containers: - name: prometheus image: prom/prometheus:v2.29.2 command: - /bin/prometheus args: - --config.file=/etc/prometheus/prometheus.yml - --storage.tsdb.path=/prometheus - --web.console.libraries=/usr/share/prometheus/console_libraries - --web.console.templates=/usr/share/prometheus/consoles ports: - name: web containerPort: 9090 volumeMounts: - name: config mountPath: /etc/prometheus - name: data mountPath: /prometheus - name: console mountPath: /usr/share/prometheus volumes: - name: config configMap: name: prometheus-config - name: data emptyDir: {} - name: console configMap: name: prometheus-console
总结
通过本文的介绍,我们了解了如何使用 Kubernetes 和 Prometheus 监控 K8s 集群。我们可以通过部署 kube-state-metrics
和 node-exporter
组件,以及配置和部署 Prometheus,来收集和存储 Kubernetes 集群的状态和节点信息,保证其高可用性和可靠性。本文的内容详细且有深度和学习以及指导意义,可以帮助读者更好地理解和应用 Kubernetes 和 Prometheus 监控系统。
来源:JavaScript中文网 ,转载请注明来源 本文地址:https://www.javascriptcn.com/post/6565ae6ad2f5e1655dee848e