Template:Affinity example

   spec:
     affinity:
       nodeAffinity:
         requiredDuringSchedulingIgnoredDuringExecution:
           nodeSelectorTerms:
           - matchExpressions:
             - key: node_group
               operator: In
               values:
               - arm_db
             - key: topology.kubernetes.io/zone
               operator: In
               values:
               - us-east-1a