Kubernetes node taints

kubectl taint nodes 192.168.204.129 key1=value1:NoExecute
node/192.168.204.129 tainted

If you do not specify a key, you can use

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-hello-deployment3
  namespace: lizhe
  labels:
    app: nginx-hello3
spec:
  replicas: 6
  selector:
    matchLabels:
      app: nginx-hello3
  template:
    metadata:
      labels:
        app: nginx-hello3
    spec:
      tolerations:
      - effect: NoExecute
        operator: Exists
      containers:
      - name: nginx-hello3
        image: nginx
        ports:
        - containerPort: 80

All keys will be ignored

You can see nginx3 running on 129

If a specific key needs to be specified, for example, key = key2 is specified here. In fact, this key2 does not exist, so there is no tolerance

    spec:
      tolerations:
      - effect: NoExecute
        operator: Exists
        key: key2

You can also add value, but you can’t use the operator

The Deployment "nginx-hello-deployment3" is invalid: spec.template.spec.tolerations[0].operator: Invalid value: core.Toleration{Key:"key1", Operator:"Exists", Value:"value2", Effect:"NoExecute", TolerationSeconds:(*int64)(nil)}: value must be empty when `operator` is 'Exists'

    spec:
      tolerations:
      - effect: NoExecute
        key: key1
        value: value2

If you want to tolerate it

    spec:
      tolerations:
      - effect: NoExecute
        key: key1
        value: value1