在 kubernetes 集群中部署 pod 时出错

Question

I'm trying to deploy this yaml in my kubernetes cluster into one of my nodes

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment-1
  labels:
    app: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80

But when I try to deploy it with the command, I get this error message

pi@k8s-master-rasp4:~ $ kubectl apply -f despliegue-nginx.yaml -l kubernetes.io/hostname=k8s-worker-1
error: no objects passed to apply

Anyone knows where the problem could be?

Thanks

Answer 1

You are not allowed to use label selector ( -l ) with kubectl apply... .

Use nodeSelector to assign pods to specific nodes:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: nginx-deployment-1
  labels:
    app: nginx
spec:
  replicas: 3
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      nodeSelector:
        kubernetes.io/hostname: k8s-worker-1 # <-- updated here!
      containers:
      - name: nginx
        image: nginx
        ports:
        - containerPort: 80