4.3. 为 Cluster Observability Operator 创建 MonitoringStack 对象

流程

1. 为 MonitoringStack 对象配置创建一个 YAML 文件。在本例中，将文件命名为 example-coo-monitoring-stack.yaml。

2. 添加以下 MonitoringStack 对象配置详情：

   MonitoringStack 对象示例

   apiVersion: monitoring.rhobs/v1alpha1
   kind: MonitoringStack
   metadata:
     name: example-coo-monitoring-stack
     namespace: ns1-coo
   spec:
     logLevel: debug
     retention: 1d
     resourceSelector:
       matchLabels:
         k8s-app: prometheus-coo-example-monitor

3. 运行以下命令来应用 MonitoringStack 对象：

   $ oc apply -f example-coo-monitoring-stack.yaml

4. 运行以下命令并检查输出，验证 MonitoringStack 对象是否可用：

   $ oc -n ns1-coo get monitoringstack

   输出示例

   NAME                         AGE
   example-coo-monitoring-stack   81m

5. 运行以下 comand，以从 Prometheus 检索有关活动目标的信息，并过滤输出以仅列出标有 app=prometheus-coo-example-app 的目标。这会验证被发现哪些目标，并由 Prometheus 使用这个特定标签主动监控。

   $ oc -n ns1-coo exec -c prometheus prometheus-example-coo-monitoring-stack-0 -- curl -s 'http://localhost:9090/api/v1/targets' | jq '.data.activeTargets[].discoveredLabels | select(.__meta_kubernetes_endpoints_label_app=="prometheus-coo-example-app")'

   输出示例

   {
     "__address__": "10.129.2.25:8080",
     "__meta_kubernetes_endpoint_address_target_kind": "Pod",
     "__meta_kubernetes_endpoint_address_target_name": "prometheus-coo-example-app-5d8cd498c7-9j2gj",
     "__meta_kubernetes_endpoint_node_name": "ci-ln-8tt8vxb-72292-6cxjr-worker-a-wdfnz",
     "__meta_kubernetes_endpoint_port_name": "web",
     "__meta_kubernetes_endpoint_port_protocol": "TCP",
     "__meta_kubernetes_endpoint_ready": "true",
     "__meta_kubernetes_endpoints_annotation_endpoints_kubernetes_io_last_change_trigger_time": "2024-11-05T11:24:09Z",
     "__meta_kubernetes_endpoints_annotationpresent_endpoints_kubernetes_io_last_change_trigger_time": "true",
     "__meta_kubernetes_endpoints_label_app": "prometheus-coo-example-app",
     "__meta_kubernetes_endpoints_labelpresent_app": "true",
     "__meta_kubernetes_endpoints_name": "prometheus-coo-example-app",
     "__meta_kubernetes_namespace": "ns1-coo",
     "__meta_kubernetes_pod_annotation_k8s_ovn_org_pod_networks": "{\"default\":{\"ip_addresses\":[\"10.129.2.25/23\"],\"mac_address\":\"0a:58:0a:81:02:19\",\"gateway_ips\":[\"10.129.2.1\"],\"routes\":[{\"dest\":\"10.128.0.0/14\",\"nextHop\":\"10.129.2.1\"},{\"dest\":\"172.30.0.0/16\",\"nextHop\":\"10.129.2.1\"},{\"dest\":\"100.64.0.0/16\",\"nextHop\":\"10.129.2.1\"}],\"ip_address\":\"10.129.2.25/23\",\"gateway_ip\":\"10.129.2.1\",\"role\":\"primary\"}}",
     "__meta_kubernetes_pod_annotation_k8s_v1_cni_cncf_io_network_status": "[{\n    \"name\": \"ovn-kubernetes\",\n    \"interface\": \"eth0\",\n    \"ips\": [\n        \"10.129.2.25\"\n    ],\n    \"mac\": \"0a:58:0a:81:02:19\",\n    \"default\": true,\n    \"dns\": {}\n}]",
     "__meta_kubernetes_pod_annotation_openshift_io_scc": "restricted-v2",
     "__meta_kubernetes_pod_annotation_seccomp_security_alpha_kubernetes_io_pod": "runtime/default",
     "__meta_kubernetes_pod_annotationpresent_k8s_ovn_org_pod_networks": "true",
     "__meta_kubernetes_pod_annotationpresent_k8s_v1_cni_cncf_io_network_status": "true",
     "__meta_kubernetes_pod_annotationpresent_openshift_io_scc": "true",
     "__meta_kubernetes_pod_annotationpresent_seccomp_security_alpha_kubernetes_io_pod": "true",
     "__meta_kubernetes_pod_controller_kind": "ReplicaSet",
     "__meta_kubernetes_pod_controller_name": "prometheus-coo-example-app-5d8cd498c7",
     "__meta_kubernetes_pod_host_ip": "10.0.128.2",
     "__meta_kubernetes_pod_ip": "10.129.2.25",
     "__meta_kubernetes_pod_label_app": "prometheus-coo-example-app",
     "__meta_kubernetes_pod_label_pod_template_hash": "5d8cd498c7",
     "__meta_kubernetes_pod_labelpresent_app": "true",
     "__meta_kubernetes_pod_labelpresent_pod_template_hash": "true",
     "__meta_kubernetes_pod_name": "prometheus-coo-example-app-5d8cd498c7-9j2gj",
     "__meta_kubernetes_pod_node_name": "ci-ln-8tt8vxb-72292-6cxjr-worker-a-wdfnz",
     "__meta_kubernetes_pod_phase": "Running",
     "__meta_kubernetes_pod_ready": "true",
     "__meta_kubernetes_pod_uid": "054c11b6-9a76-4827-a860-47f3a4596871",
     "__meta_kubernetes_service_label_app": "prometheus-coo-example-app",
     "__meta_kubernetes_service_labelpresent_app": "true",
     "__meta_kubernetes_service_name": "prometheus-coo-example-app",
     "__metrics_path__": "/metrics",
     "__scheme__": "http",
     "__scrape_interval__": "30s",
     "__scrape_timeout__": "10s",
     "job": "serviceMonitor/ns1-coo/prometheus-coo-example-monitor/0"
   }

   注意

   上面的示例使用 jq 命令行 JSON 处理器 来格式化输出，以方便使用。