Example of nodeSelector and nodeAffinity in Kubernetes

example-nodeAffinity-kubernetes.yaml

apiVersion: v1
kind: Pod
metadata:
  name: with-node-affinity
spec:
  affinity:
    nodeAffinity:
      requiredDuringSchedulingIgnoredDuringExecution:
        nodeSelectorTerms:
        - matchExpressions:
          - key: kubernetes.io/e2e-az-name
            operator: In
            values:
            - e2e-az1
            - e2e-az2
      preferredDuringSchedulingIgnoredDuringExecution:
      - weight: 1
        preference:
          matchExpressions:
          - key: another-node-label-key
            operator: In
            values:
            - another-node-label-value
  containers:
  - name: with-node-affinity
    image: k8s.gcr.io/pause:2.0
    
    
TODO: Debug this example
---
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

example-nodeSelector-kubernetes.yaml

---
apiVersion: v1
kind: Pod
metadata:
  name: nginx
  labels:
    env: test
spec:
  containers:
  - name: nginx
    image: nginx
    imagePullPolicy: IfNotPresent
  nodeSelector:
    key1: value1
    key2: value2
...

---
apiVersion: v1
kind: Pod
metadata:
  name: nginx
  labels:
    env: test
spec:
  containers:
  - name: nginx
    image: nginx
    imagePullPolicy: IfNotPresent
  nodeSelector:
    disktype: ssd
...


---

apiVersion: v1
kind: Pod
metadata:
  name: nginx
  labels:
    env: test
spec:
  containers:
  - name: nginx
    image: nginx
  nodeSelector:
    beta.kubernetes.io/instance-type: m3.medium
    example.com/load-balancer: true
---
apiVersion: v1
kind: Pod
metadata:
  name: httpd
  labels:
    env: test
spec:
  containers:
  - name: httpd
    image: httpd
  nodeSelector:
    failure-domain.beta.kubernetes.io/region: us-west-2

https://gist.github.com/devops-school/3da18faede22b18ac7013c404bc10740#file-example-nodeaffinity-kubernetes-yaml-L81

The label for httpd pod should be httpd, correct?