云容器引擎 CCE-应用扩缩容优先级策略:默认应用扩缩容优先级策略

时间：2024-04-23 19:45:32

云容器引擎 CCE Volcano调度

默认应用扩缩容优先级策略

使用默认应用扩缩容优先级策略的情况下，集群中存在两个默认CR资源：

Balancer CRD对应的CR资源

apiVersion: autoscaling.volcano.sh/v1alpha1
kind: Balancer
metadata:
  name: default-balancer
spec:
  balancerPolicyTemplateName: default-balancerpolicytemplate
  targets:
  - namespaceSelector:
      matchExpressions:
        - key: kubernetes.io/metadata.name
          operator: Exists
  weight: 10

表1 Balancer对象关键参数说明
字段	含义	类型	备注
metadata.name	名称	String	必填字段。
spec. balancerPolicyTemplateName	优先级策略名称	String	必填字段。值为集群中相应BalancerPolicyTemplate CR资源名。
spec.targets	优先级策略作用范围	Slice	必填字段。举例：针对default命名空间下的应用生效 spec: targets: - namespaceSelector: matchLabels: kubernetes.io/metadata.name: default 针对default、other、another多个命名空间下的应用生效 spec: targets: - namespaceSelector: matchExpressions: - key: kubernetes.io/metadata.name operator: In values: - default - other - another 针对所有命名空间下的应用生效 spec: targets: - namespaceSelector: matchExpressions: - key: kubernetes.io/metadata.name operator: Exists 只针对名为xxx-xxx-xxx，类型为Deployment的应用生效 spec: targets: - objectSelectors: - name: xxx-xxx-xxx kind: Deployment 只针对命名空间为default，名为xxx-xxx-xxx类型为Deployment的应用生效 spec: targets: - namespaceSelector: matchLabels: kubernetes.io/metadata.name: default objectSelectors: - name: xxx-xxx-xxx kind: Deployment
spec.weight	优先级策略权重	int32	必填字段。在集群存在多个Balancer 对象资源情况下，某个应用可能存在于多个Balancer对象作用范围的交集中，此时选择weight值大的Balancer对象生效。

BalancerPolicyTemplate CRD对应的CR资源

apiVersion: autoscaling.volcano.sh/v1alpha1
kind: BalancerPolicyTemplate
metadata:
  name: default-balancerpolicytemplate
spec:
  policy:
    policyName: Priority
    priorities:
      priorityGroups:
      - priority: 10
        requirements:
        - key: node.cce.io/billing-mode
          operator: In
          values:
          - post-paid
      - priority: 100
        requirements:
        - key: node.cce.io/billing-mode
          operator: In
          values:
          - pre-paid
      - priority: 1
        requirements:
        - key: kubernetes.io/role
          operator: In
          values:
          - virtual-kubelet
          - bursting

表2 BalancerPolicyTemplate对象关键参数说明
字段	含义	类型	备注
metadata.name	名称	String	必填字段。
spec.policy	优先级策略内容	Struct	必填字段。
spec.policy.policyname	优先级策略名	String	必填字段。当前只支持名为“Priority”的优先级策略。
spec.policy.priorities. priorityGroups	优先级策略中定义的具体优先级	Slice	必填字段。举例：将包周期节点的优先级设置为100 priorityGroups: - priority: 100 requirements: - key: node.cce.io/billing-mode operator: In values: - pre-paid 将按需计费节点的优先级设置为10 priorityGroups: - priority: 10 requirements: - key: node.cce.io/billing-mode operator: In values: - post-paid 将virtual-kubelet/bursting节点的优先级设置为1 priorityGroups: - priority: 1 requirements: - key: kubernetes.io/role operator: In values: - virtual-kubelet - bursting