example yaml for pod anti-affinity

pod-antiaffinity.yaml

apiVersion: v1
kind: Pod
metadata:
  name: nginx
  labels:
    nginx: yes
  annotations:
    scheduler.alpha.kubernetes.io/affinity: >
      {
        "nodeAffinity": {
          "requiredDuringSchedulingIgnoredDuringExecution": [
            {
              "labelSelector": {
                "matchExpressions": [
                  {
                    "key": "x-web",
                    "operator": "In",
                    "values": ["yes", "true"]
                  }
                ]
              }
            }
          ]
         },
         "podAntiAffinity": {
           "requiredDuringSchedulingIgnoredDuringExecution": [
             {
               "labelSelector": {
                 "matchExpressions": [
                   {
                     "key": "httpd",
                     "operator": "Exists"
                     "values": ["yes", "true"]
                   }
                 ]
               }
             }
           ]
         }
      }
spec:
  containers:
  - name: nginx
    image: nginx
---
apiVersion: v1
kind: Pod
metadata:
  name: httpd
  labels:
    nginx: yes
  annotations:
    scheduler.alpha.kubernetes.io/affinity: >
      {
        "nodeAffinity": {
          "preferredDuringSchedulingIgnoredDuringExecution": [
            {
              "labelSelector": {
                "matchExpressions": [
                  {
                    "key": "y-web",
                    "operator": "In",
                    "values": ["yes", "true"]
                  }
                ]
              }
            }
          ]
        }
      }
spec:
  containers:
  - name: httpd
    image: httpd