7.4.3. 移动监控解决方案

流程

1. 将以下 ConfigMap 定义保存为 cluster-monitoring-configmap.yaml 文件：

   apiVersion: v1
   kind: ConfigMap
   metadata:
     name: cluster-monitoring-config
     namespace: openshift-monitoring
   data:
     config.yaml: |+
       alertmanagerMain:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       prometheusK8s:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       prometheusOperator:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       grafana:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       k8sPrometheusAdapter:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       kubeStateMetrics:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       telemeterClient:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       openshiftStateMetrics:
         nodeSelector:
           node-role.kubernetes.io/infra: ""
       thanosQuerier:
         nodeSelector:
           node-role.kubernetes.io/infra: ""

   运行此配置映射会强制将监控堆栈的组件重新部署到基础架构节点。

2. 应用新的配置映射：

   $ oc create -f cluster-monitoring-configmap.yaml

3. 观察监控 pod 移至新机器：

   $ watch 'oc get pod -n openshift-monitoring -o wide'

4. 如果组件没有移到 infra 节点，请删除带有这个组件的 pod:

   $ oc delete pod -n openshift-monitoring <pod>

   已删除 pod 的组件在 infra 节点上重新创建。