Taints：避免Pod 调度到特定Node 上

• 带effect的特殊label，对Pod有排斥性
  –硬性排斥NoSchedule
  –软性排斥PreferNoSchedule
• 系统创建的taint附带时间戳
  –effect为NoExecute
  –便于触发对Pod的超时驱逐
• 典型用法：预留特殊节点做特殊用途

给node添加taint
kubectl taint node node-n1 foo=bar:NoSchedule
删除taint
kubectl taint node node-n1 foo:NoSchedule-

apiVersion: v1
kind: Node
metadata:
labels:
beta.kubernetes.io/arch: amd64
beta.kubernetes.io/os: linux
kubernetes.io/hostname: node-n1
name: node-n1
spec:
externalID: node-n1
taints:
-effect: NoSchedule
key: accelerator
timeAdded: null
value: gpu
status: {...}
给node添加taint
kubectltaint