12.2. 使用 worker 延迟配置集

要实现 worker 延迟配置集来处理网络延迟，请编辑 node.config 对象以添加配置集的名称。当延迟增加或减少时，您可以随时更改配置集。

您必须一次移动一个 worker 延迟配置集。例如，您无法直接从 Default 配置集移到 LowUpdateSlowReaction worker 延迟配置集。您必须首先从 default worker 延迟配置集移到 MediumUpdateAverageReaction 配置集，然后将其移到 LowUpdateSlowReaction。同样，当返回到默认配置集时，必须首先从低配置集移到中型配置集，然后再进入默认值。

注意

您还可以在安装 OpenShift Container Platform 集群时配置 worker 延迟配置集。

流程

从默认的 worker 延迟配置集移动：

  1. 移到中型 worker 延迟配置集：

    1. 编辑 node.config 对象： 

      $ oc edit nodes.config/cluster

    2. 添加 spec.workerLatencyProfile: MediumUpdateAverageReaction ：

      node.config 对象示例

      apiVersion: config.openshift.io/v1
kind: Node
metadata:
  annotations:
    include.release.openshift.io/ibm-cloud-managed: "true"
    include.release.openshift.io/self-managed-high-availability: "true"
    include.release.openshift.io/single-node-developer: "true"
    release.openshift.io/create-only: "true"
  creationTimestamp: "2022-07-08T16:02:51Z"
  generation: 1
  name: cluster
  ownerReferences:
  - apiVersion: config.openshift.io/v1
    kind: ClusterVersion
    name: version
    uid: 36282574-bf9f-409e-a6cd-3032939293eb
  resourceVersion: "1865"
  uid: 0c0f7a4c-4307-4187-b591-6155695ac85b
spec:
  workerLatencyProfile: MediumUpdateAverageReaction 1

# ...

      1
      指定中型 worker 延迟策略。

      随着更改被应用，每个 worker 节点上的调度都会被禁用。

  2. 可选：移到低 worker 延迟配置集：

    1. 编辑 node.config 对象： 

      $ oc edit nodes.config/cluster

    2. 将 spec.workerLatencyProfile 值更改为 LowUpdateSlowReaction ：

      node.config 对象示例

      apiVersion: config.openshift.io/v1
kind: Node
metadata:
  annotations:
    include.release.openshift.io/ibm-cloud-managed: "true"
    include.release.openshift.io/self-managed-high-availability: "true"
    include.release.openshift.io/single-node-developer: "true"
    release.openshift.io/create-only: "true"
  creationTimestamp: "2022-07-08T16:02:51Z"
  generation: 1
  name: cluster
  ownerReferences:
  - apiVersion: config.openshift.io/v1
    kind: ClusterVersion
    name: version
    uid: 36282574-bf9f-409e-a6cd-3032939293eb
  resourceVersion: "1865"
  uid: 0c0f7a4c-4307-4187-b591-6155695ac85b
spec:
  workerLatencyProfile: LowUpdateSlowReaction 1

# ...

      1
      指定使用低 worker 延迟策略。

      随着更改被应用，每个 worker 节点上的调度都会被禁用。

验证

  • 当所有节点都返回到 Ready 条件时，您可以使用以下命令查看 Kubernetes Controller Manager 以确保应用它： 

    $ oc get KubeControllerManager -o yaml | grep -i workerlatency -A 5 -B 5

    输出示例

    # ...
    - lastTransitionTime: "2022-07-11T19:47:10Z"
      reason: ProfileUpdated
      status: "False"
      type: WorkerLatencyProfileProgressing
    - lastTransitionTime: "2022-07-11T19:47:10Z" 1
      message: all static pod revision(s) have updated latency profile
      reason: ProfileUpdated
      status: "True"
      type: WorkerLatencyProfileComplete
    - lastTransitionTime: "2022-07-11T19:20:11Z"
      reason: AsExpected
      status: "False"
      type: WorkerLatencyProfileDegraded
    - lastTransitionTime: "2022-07-11T19:20:36Z"
      status: "False"
# ...

    1
    指定配置集被应用并激活。

要将低配置集改为中型，或将中型更改为低，编辑 node.config 对象，并将 spec.workerLatencyProfile 参数设置为适当的值。