apiVersion: v1
kind: Pod
metadata:
  name: mypod
spec:
  containers:
  - name: demo
    image: ghcr.io/trion-development/echoserver:1
    resources: {}
    ports:
      - containerPort: 3000
  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:
          - key: kubernetes.io/os
            operator: In
            values:
            - linux
    podAntiAffinity:
      preferredDuringSchedulingIgnoredDuringExecution:
      - weight: 1
        podAffinityTerm:
          labelSelector:
            matchExpressions:
            - key: app
              operator: In
              values:
              - myapp
          topologyKey: kubernetes.io/hostname