kubernetes - K8s 节点标签有键没有值

Question

有时 k8s 节点被标记为 k8s.infra/postgres= 。这是节点的有效标签吗？

我们如何在部署 list 中添加节点关联性的同时使用这种标签？

    spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
            - matchExpressions:
              - key: k8s.infra/postgres
                operator: Exists
                values:
                - 
                - 

Answer 1

Sometimes k8s nodes are labelled as k8s.infra/postgres= . Is this a valid label for a node?

是的，这是一个有效的标签。键的类型是string，值也是string，但值可以是空string:"".

How do we use this kind of label whilst adding node affinities in our Deployment manifests?

运算符 Exists 和 DoesNotExist 只使用 key: 而不是 values: 所以你可以写:

        - matchExpressions:
          - key: k8s.infra/postgres
            operator: Exists