查看node节点标签

$ kubectl get nodes --show-labels
node5.production.k8s   Ready    <none>   123d     v1.17.0   beta.kubernetes.io/arch=amd64,beta.kubernetes.io/os=linux,kubernetes.io/arch=amd64,kubernetes.io/hostname=node5.production.k8s,kubernetes.io/os=linux

deployment以nodeSelector作为调度规则

imagePullSecrets:
- name: zzmed-registry
volumes:
- hostPath:
  name: local-app-log
    path: /log/app
nodeSelector:
        kubernetes.io/hostname: node5.production.k8s

添加污点

$ kubectl taint node node5.production.k8s node-for=cronjob:NoSchedule

查看污点

$ kubectl describe nodes node5.production.k8s|grep -i taint
Taints:             node-for=cronjob:NoSchedule

删除污点

$ kubectl taint node node5.production.k8s node-for-
node/node5.production.k8s untainted

deployment以污点作为调度规则

imagePullSecrets:
- name: zzmed-registry
tolerations:
- effect: NoSchedule
  key: node-for
  operator: Equal
  value: cronjob
volumes:
- hostPath:
  path: /log/app
  name: local-app-log