Make pod run on same node

General Discussions
1

How can I make the pods defined by deployment run on the same node, but I don’t want to specify which node it is

2

You can use affinity for that:

In the same document, you can find exactly your use case: Always co-located in the same node

apiVersion: apps/v1
kind: Deployment
metadata:
  name: redis-cache
spec:
  selector:
    matchLabels:
      app: store
  replicas: 3
  template:
    metadata:
      labels:
        app: store
    spec:
      affinity:
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
          - labelSelector:
              matchExpressions:
              - key: app
                operator: In
                values:
                - store
            topologyKey: "kubernetes.io/hostname"
      containers:
      - name: redis-server
        image: redis:3.2-alpine
3

Thanks for your reply！！！
I will try it first