04 - taints-tolerations.md

Taints and Tolerations

• Example:

  • kubectl taint nodes worker01 disk=ssh:NoSchedule
    • NoSchedule will not be schedule on it
  • kubectl taint nodes worker01 disk=ssh:PreferNoSchedule
    • PreferNoSchedule will try to avoid schedule on it
  • kubectl taint nodes worker01 disk=ssh:NoExecute
    • NoExecute will evict all the pods that don't have the taint

• Remove taint:

  • kubectl taint nodes worker01 disk=ssh:NoExecute-

• POD:

  apiVersion: v1
  kind: Pod
  metadata:
    name: nginx
  spec:
    containers:
    - name: nginx
      image: nginx
    tolerations:
    - key: "example-key"
      operator: "Exists"
      effect: "NoSchedule"