第 2 章 指标和 Service Mesh

流程

1. 创建名为 servicemonitor.yml 的 YAML 文件来监控 Istio control plane：

   ServiceMonitor 对象示例

   apiVersion: monitoring.coreos.com/v1
   kind: ServiceMonitor
   metadata:
     name: istiod-monitor
     namespace: istio-system
   spec:
     targetLabels:
     - app
     selector:
       matchLabels:
         istio: pilot
     endpoints:
     - port: http-monitoring
       interval: 30s

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2. 运行以下命令来应用 YAML 文件：

   $ oc apply -f servicemonitor.yml

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3. 创建名为 podmonitor.yml 的 YAML 文件，从 Istio 代理收集指标：

   PodMonitor 对象示例

   apiVersion: monitoring.coreos.com/v1
   kind: PodMonitor
   metadata:
     name: istio-proxies-monitor
     namespace: istio-system 

   1

   
   spec:
     selector:
       matchExpressions:
       - key: istio-prometheus-ignore
         operator: DoesNotExist
     podMetricsEndpoints:
     - path: /stats/prometheus
       interval: 30s
       relabelings:
       - action: keep
         sourceLabels: ["__meta_kubernetes_pod_container_name"]
         regex: "istio-proxy"
       - action: keep
         sourceLabels: ["__meta_kubernetes_pod_annotationpresent_prometheus_io_scrape"]
       - action: replace
         regex: (\d+);(([A-Fa-f0-9]{1,4}::?){1,7}[A-Fa-f0-9]{1,4})
         replacement: '[$2]:$1'
         sourceLabels: ["__meta_kubernetes_pod_annotation_prometheus_io_port","__meta_kubernetes_pod_ip"]
         targetLabel: "__address__"
       - action: replace
         regex: (\d+);((([0-9]+?)(\.|$)){4})
         replacement: '$2:$1'
         sourceLabels: ["__meta_kubernetes_pod_annotation_prometheus_io_port","__meta_kubernetes_pod_ip"]
         targetLabel: "__address__"
       - sourceLabels: ["__meta_kubernetes_pod_label_app_kubernetes_io_name","__meta_kubernetes_pod_label_app"]
         separator: ";"
         targetLabel: "app"
         action: replace
         regex: "(.+);.*|.*;(.+)"
         replacement: "${1}${2}"
       - sourceLabels: ["__meta_kubernetes_pod_label_app_kubernetes_io_version","__meta_kubernetes_pod_label_version"]
         separator: ";"
         targetLabel: "version"
         action: replace
         regex: "(.+);.*|.*;(.+)"
         replacement: "${1}${2}"
       - sourceLabels: ["__meta_kubernetes_namespace"]
         action: replace
         targetLabel: namespace
       - action: replace
         replacement: "the-mesh-identification-string" 

   2

   
         targetLabel: mesh_id

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   1

   指定 PodMonitor 对象必须应用到所有网格命名空间中，包括 Istio control plane 命名空间，因为 OpenShift Container Platform 监控会忽略 ServiceMonitor 和 PodMonitor 对象中的 namespaceSelector spec。

   2

   指定实际的网格 ID。

4. 运行以下命令来应用 YAML 文件：

   $ oc apply -f podmonitor.yml

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5. 在 OpenShift 控制台中，进入 Observe Metrics，并运行查询 istio_requests_total。

   注意

   指标 实施可能需要几分钟时间来返回结果。