nodeAffinity-pre-req.yaml

# In this scenario, the node must have a label with the key topology.kubernetes.io/zone and the value of that label must be us-central1-c.
# and The node preferably has a label with the key env and the value will be either test or prod. Here the in preferred condition, 
# Nodes with the highest total score are prioritized when the scheduler makes a scheduling decision for the Pod. so node with the key a env and value with test will pick by scheduler.
apiVersion: v1
kind: Pod
metadata:
  name: node-affinity6
spec:
  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:
          - key: topology.kubernetes.io/zone
            operator: In
            values:
            - us-central1-c
      preferredDuringSchedulingIgnoredDuringExecution:
      - weight: 5
        preference:
          matchExpressions:
          - key: env
            operator: In
            values:
            - test
      - weight: 1
        preference:
          matchExpressions:
           - key: env
             operator: In
             values:
             - prod
  nodeSelector:
    env: dev
  containers:
  - image: nginx
    name: nginx