节点亲和性添加

1、查看标签
kubectl  get nodes --show-labels

2、打标签
kubectl label nodes node1.com kong=true 
kubectl label nodes node2.com kong=true 
kubectl label nodes node3.com kong=true

3、pod添加亲和性
spec:
      affinity:
        nodeAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
            nodeSelectorTerms:
            - matchExpressions:
              - key: kong
                operator: In
                values:
                - "true"
4、删除label
kubectl label nodes node1.com kong-