第 2 章 配置 Cluster Observability Operator 以监控服务

流程

1. 创建名为 prometheus-coo-example-app.yaml 的 YAML 文件，其中包含命名空间、部署和服务的以下配置详情：

   apiVersion: v1
   kind: Namespace
   metadata:
     name: ns1-coo
   ---
   apiVersion: apps/v1
   kind: Deployment
   metadata:
     labels:
       app: prometheus-coo-example-app
     name: prometheus-coo-example-app
     namespace: ns1-coo
   spec:
     replicas: 1
     selector:
       matchLabels:
         app: prometheus-coo-example-app
     template:
       metadata:
         labels:
           app: prometheus-coo-example-app
       spec:
         containers:
         - image: ghcr.io/rhobs/prometheus-example-app:0.4.2
           imagePullPolicy: IfNotPresent
           name: prometheus-coo-example-app
   ---
   apiVersion: v1
   kind: Service
   metadata:
     labels:
       app: prometheus-coo-example-app
     name: prometheus-coo-example-app
     namespace: ns1-coo
   spec:
     ports:
     - port: 8080
       protocol: TCP
       targetPort: 8080
       name: web
     selector:
       app: prometheus-coo-example-app
     type: ClusterIP

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2. 保存该文件。

3. 运行以下命令，将配置应用到集群：

   $ oc apply -f prometheus-coo-example-app.yaml

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4. 运行以下命令验证 pod 是否正在运行，并观察输出：

   $ oc -n ns1-coo get pod

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   输出示例

   NAME                                      READY     STATUS    RESTARTS   AGE
   prometheus-coo-example-app-0927545cb7-anskj   1/1       Running   0          81m

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