3.3.4.2. 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

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

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pod pod-s2 在 podAntiAffinity 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

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

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pod pod-s2 无法调度到与 pod-s1 相同的节点上。

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3.3.4.2. Pod 反关联性

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