A new task page for assigining a pod to nodes using node affinity (#19265)

* Example for required node affinity tasks

Example for required node affinity tasks

* Create pod-nginx-preffered-affinity.yaml

* task for assigning pods nodes using node affinity

A new task for assigning pods nodes using node affinity

* Correcting syntax and spelling

Correcting syntax and spelling

* Correcting syntax and spelling

Correcting syntax and spelling

* fix for review comment 

Fix for review comment

* Adding min k8s server version

Adding min k8s server version

* Correcting small style issues

Correcting small style issues. This will also retrigger new build.

content/en/examples/pods/pod-nginx-preferred-affinity.yaml

@@ -0,0 +1,19 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: nginx
+spec:
+  affinity:
+    nodeAffinity:
+      preferredDuringSchedulingIgnoredDuringExecution:
+      - weight: 1
+        preference:
+          matchExpressions:
+          - key: disktype
+            operator: In
+            values:
+            - ssd          
+  containers:
+  - name: nginx
+    image: nginx
+    imagePullPolicy: IfNotPresent

content/en/examples/pods/pod-nginx-required-affinity.yaml

@@ -0,0 +1,18 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: nginx
+spec:
+  affinity:
+    nodeAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+        nodeSelectorTerms:
+        - matchExpressions:
+          - key: disktype
+            operator: In
+            values:
+            - ssd            
+  containers:
+  - name: nginx
+    image: nginx
+    imagePullPolicy: IfNotPresent