K8S節點親和性nodeAffinity

一、nodeAffinity

類似于nodeSelector,根據節點上的标簽來排程Pod到哪些節點

二、排程政策

硬政策（required）：必須滿足,不滿足則Pod處于Pending狀态

軟政策（preferred）：嘗試滿足，但不保證

操作符：In、NotIn、Exists、DoseNotExist、Gt、Lt

三、示例

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​3.1.硬政策​

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affinity:
  nodeAffinity:
    requiredDuringSchedulingIgnoredDuringExecution:
      nodeSelectorTerms:
      - matchExpressions:
        - key: nodeType
          operator: In
          values:
          - dev      

​

​3.2.軟政策​

​

affinity:
  nodeAffinity:
    preferredDuringSchedulingIgnoredDuringExecution:
    - weight: 1
      preference:
        matchExpressions:
        - key: nodeType
          operator: In
          values:
          - test