3.10.4. 配置 descheduler 策略

流程

1. 编辑 KubeDescheduler 对象：

   $ oc edit kubedeschedulers.operator.openshift.io cluster -n openshift-kube-descheduler-operator

2. 在 spec.strategies 部分中指定一个或多个策略 。

   apiVersion: operator.openshift.io/v1beta1
   kind: KubeDescheduler
   metadata:
     name: cluster
     namespace: openshift-kube-descheduler-operator
   spec:
     deschedulingIntervalSeconds: 3600
     strategies:
       - name: "LowNodeUtilization" 1
         params:
          - name: "CPUThreshold"
            value: "10"
          - name: "MemoryThreshold"
            value: "20"
          - name: "PodsThreshold"
            value: "30"
          - name: "MemoryTargetThreshold"
            value: "40"
          - name: "CPUTargetThreshold"
            value: "50"
          - name: "PodsTargetThreshold"
            value: "60"
          - name: "NumberOfNodes"
            value: "3"
       - name: "RemoveDuplicates" 2
         params:
          - name: "ExcludeOwnerKinds"
            value: "ReplicaSet"
       - name: "RemovePodsHavingTooManyRestarts" 3
         params:
          - name: "PodRestartThreshold"
            value: "10"
          - name: "IncludingInitContainers"
            value: "false"
       - name: "RemovePodsViolatingInterPodAntiAffinity" 4
       - name: "PodLifeTime" 5
         params:
          - name: "MaxPodLifeTimeSeconds"
            value: "86400"

   1

   LowNodeUtilization 策略提供额外的参数，如 CPUThreshold 和 MemoryThreshold，您可以选择进行配置。

   2

   RemoveDuplicates 策略提供了一个可选参数 ExcludeOwnerKinds。

   3

   RemovePodsHavingTooManyRestarts 策略要求设置 PodRestartThreshold 参数。它还提供可选的 InudingInitContainers 参数。

   4

   RemovePodsViolatingInterPodAntiAffinity、RemovePodsViolatingNodeAffinity 和 RemovePodsViolatingNodeTaints 策略 没有可以配置的额外参数。

   5

   PodLifeTime 策略需要设置 MaxPodLifeTimeSeconds 参数。

   您可以启用多个策略，且指定策略的顺序并不重要。

3. 保存文件以使改变生效。