Kubernetes学习笔记（十一）：Node Selectors & Affinity

• Node Selectors

pod-definition.yml

spec:
  nodeSelector:
    size: Large  ##生效前需要先标记 node

kubectl label nodes <node-name> <label-key>=<label-value> : 标记node

• Node Affinity

pod-definition.yml

spec:
  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:
          - key: size
            operator: NotIn | In | Exists ## Exists运算符甚至不需要下面的values
            values:
            - Large
            - Medium

Available ：

• requiredDuringSchedulingIgnoredDuringExecution
• preferredDuringSchedulingIgnoredDuringExecution

Planned :

• requiredDuringSchedulingrequiredDuringExecution

DuringScheduling : Pod不存在且是首次创建

	DuringScheduling	DuringExecution
Type1	Required	Ignored
Type2	Preferred	Ignored
Type3	Required	Required