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16.9.3.2. Pod 反关联性

以下示例演示了具有匹配标签和标签选择器的 pod 的 pod 反关联性。

  • pod pod-s1 具有标签 security:s1

    $ cat pod-s1.yaml
    apiVersion: v1
    kind: Pod
    metadata:
      name: pod-s1
      labels:
        security: s1
    spec:
      containers:
      - name: ocp
        image: docker.io/ocpqe/hello-pod
  • pod pod-s2podAntiAffinity 下具有标签选择器 security:s1

    $ cat pod-s2.yaml
    apiVersion: v1
    kind: Pod
    metadata:
      name: pod-s2
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
          - labelSelector:
              matchExpressions:
              - key: security
                operator: In
                values:
                - s1
            topologyKey: kubernetes.io/hostname
      containers:
      - name: pod-antiaffinity
        image: docker.io/ocpqe/hello-pod
  • pod pod-s2 无法调度到与 pod-s1 相同的节点上。