Question

我正在尝试为我的部署副本创建一个 podAffinity，以便部署在我的 GCP 集群内的不同节点中，我已经按照本站点 https://thenewstack.io/implement-node-and-pod-affinity-anti-affinity-in-kubernetes-a-practical-example/ 的文档进行操作，但是在执行 apply 时出现此错误：< /p>

error: error validating ".\\K8s\\6flask-deployment.yaml": error validating data: ValidationError(Deployment.spec.template.spec.affinity.podAntiAffinity.requiredDuringSchedulingIgnoredDuringExecution[0].labelSelector): unknown field "MatchExpressions" in io.k8s.apimachinery.pkg.apis.meta.v1.LabelSelector;

这是我的flask-deployment.yaml。我试图将它也设置在第一个规范之下，但它也不起作用

apiVersion: apps/v1
kind: Deployment
metadata:
  name: flask-deployment
  namespace: flask-app
spec:
  replicas: 2
  selector:
    matchLabels:
      app: flask-app
      deploy: separate
      run: together
  template:
    metadata:
      labels:
        app: flask-app
        deploy: separate
        run: together
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
          - labelSelector:
              MatchExpressions:
                - key: deploy
                  operator: In
                  values:
                  - separate
            topologyKey: kubernetes.io/hostname  
      containers:

是识别错误吗？ kubernetes linter 没有标记任何东西，我一直在与 SO 中和网络上的其他示例进行比较，但我找不到错误

Answer 1

您在 matchExpressions 中指定的任何键值还需要位于 pod labels 的 matchLabels 和 spec 而不是 metadata 部分。它应该如下

apiVersion: apps/v1
kind: Deployment
metadata:
  name: mongodb-deployment
  namespace: flask-app
spec:
  replicas: 2  
  selector:
    matchLabels:
      deploy: separate
  template:
    metadata:
      labels:
        deploy: separate
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
          - labelSelector:
              matchExpressions:
              - key: deploy
                operator: In
                values:
                - separate
            topologyKey: "kubernetes.io/hostname"

使用 podAffinity 和 podAntiaffinity 时验证 matchExpression 时出错

1 个答案: