K8S---Node的隔离与恢复

Node的隔离与恢复

使用yaml文件进行隔离和恢复调度

可能会报错，不建议使用

# 隔离调度
# unschedule_node.yaml

apiVersion: v1
kind: Node
metadata:
  name: k8s-node1
  labels:
    kubernetes.io/hostname: k8s-node1
spec:
  unschedulable: true

# 对node状态进行修改
# kubectl replace -f unschedule_node.yaml
# 观察node状态，是否包含 SchedulingDisabled
# kubectl get nodes

# 报错
# The Node "k8s-node1" is invalid: spec.podCIDRs: Forbidden: node updates may not change podCIDR except from "" to valid


---

# 恢复调度
# unschedule_node.yaml

apiVersion: v1
kind: Node
metadata:
  name: k8s-node1
  labels:
    kubernetes.io/hostname: k8s-node1
spec:
  unschedulable: false

# 对node状态进行修改
# kubectl replace -f unschedule_node.yaml
# 观察node状态，是否包含 SchedulingDisabled
# kubectl get nodes

# 报错
# The Node "k8s-node1" is invalid: spec.podCIDRs: Forbidden: node updates may not change podCIDR except from "" to valid

使用kubectl patch实现node的隔离和恢复调度

隔离
kubectl patch node k8s-node1 -p ‘{“spec”:{“unschedulable”:true}}’

恢复
kubectl patch node k8s-node1 -p ‘{“spec”:{“unschedulable”:false}}’

使用cordon和uncordon进行隔离和恢复调度

隔离
kubectl cordon k8s-node1

恢复
kubectl uncordon k8s-node1