Question

我在使用nodeAntiAffinity时遇到了麻烦...在我的用例中，我需要防止StatefulSet的实例在同一节点上运行，仅此而已。我没有用于节点的标签，该文档需要列出该标签。是否可以完全依赖内置标签“ kubernetes.io/hostname”的唯一值？

我要在StatefulSet中做什么：

door(1,2).
door(1,7).
door(2,1).
door(2,8).
door(3,8).
door(4,8).
door(4,9).
door(5,9).
door(5,6).
door(6,9).
door(7,1).
door(7,8).
door(7,9).
door(7,10).
door(7,11).
door(7,12).
door(7,13).
door(7,14).
door(8,2).
door(8,3).
door(8,4).
door(8,7).
door(9,4).
door(9,5).
door(9,6).
door(9,7).
door(10,7).
door(11,7).
door(12,7).
door(13,7).
door(14,7).
door(14,15).
door(15,16).
door(16,15).
phone(5).
phone(9).
phone(16).


rooms_connected(X, Y) :- door(X, Y), door(Y, X).

path_to_phone(Start, End, Path) :- 
    move(Start, End,[Start], Room), 
    reverse(Room,Path).

move(Start, End, Path, [End|Path]) :- 
    rooms_connected(Start, End),
    phone(End).

move(Start, Middle, Visit, Path) :-
    rooms_connected(Start, End),
    End \== Middle, 
    \+member(End, Visit),
    move(End, Middle, [End|Visit], Path).

文档中的示例说我必须要做的事情：

spec:
  podManagementPolicy: OrderedReady
  affinity:
    nodeAntiAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        topologyKey: "kubernetes.io/hostname"

Answer 1

要防止StatefulSet的实例在同一节点上运行，您需要一个podAntiAffinity，摘自Kubernetes document的zookeeper教程：

  affinity:
    podAntiAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        - labelSelector:
            matchExpressions:
              - key: "app"
                operator: In
                values:
                - zk
          topologyKey: "kubernetes.io/hostname"

StatefulSets中的Node AntiAffinity，如何仅依赖于节点名称而不是查找特定标签？

1 个答案: