编辑“︁Kubernetes节点亲和性”︁（章节）

== 实际案例 ==
=== 场景：混合环境调度 ===
假设集群中有以下节点：
* 节点A：'''env=prod, zone=us-east-1'''
* 节点B：'''env=dev, zone=us-west-2'''

需要将生产环境的Pod调度到'''env=prod'''且区域为'''us-east-1'''或'''us-east-2'''的节点：
<syntaxhighlight lang="yaml">
affinity:
  nodeAffinity:
    requiredDuringSchedulingIgnoredDuringExecution:
      nodeSelectorTerms:
      - matchExpressions:
        - key: env
          operator: In
          values: ["prod"]
        - key: zone
          operator: In
          values: ["us-east-1", "us-east-2"]
</syntaxhighlight>

=== 权重分配示例 ===
<mermaid>
pie
    title 软性约束权重分配
    "gpu=true (Weight 80)" : 80
    "ssd=true (Weight 20)" : 20
</mermaid>

对应YAML配置：
<syntaxhighlight lang="yaml">
preferredDuringSchedulingIgnoredDuringExecution:
- weight: 80
  preference:
    matchExpressions:
    - key: gpu
      operator: In
      values: ["true"]
- weight: 20
  preference:
    matchExpressions:
    - key: ssd
      operator: In
      values: ["true"]
</syntaxhighlight>