add affinity

chart/templates/twistlock_console.yaml

@@ -74,6 +74,15 @@ spec:
       imagePullSecrets:
         {{- toYaml . | nindent 8 }}
       {{- end }}
+      {{- if .Values.affinity }}
+      affinity:
+{{ toYaml .Values.affinity | indent 8 }}
+{{- end }}
+    {{- if .Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml .Values.nodeSelector | indent 8 }}
+      {{- end }}
+
       containers:
       - name: twistlock-console
         image: {{ .Values.console.image.repository }}:{{ .Values.console.image.tag }}

chart/values.yaml

@@ -26,4 +26,7 @@ console:
 
   persistence:
     size: 100Gi
-    accessMode: ReadWriteOnce
\ No newline at end of file
+    accessMode: ReadWriteOnce
+nodeSelector: {}
+affinity: {}
+ 

docs/affinity.md

+# Affinity
+
+* [kubernetes affinity ](https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/#affinity-and-anti-affinity)
+
+Pod constraints for istio operator is implemented following the kubernetes affinity documentation. Istio Operator can constraint a pod using nodeSelector or Affinity/Antti-affinity feature
+
+## nodeSelector 
+in the values.yaml  add nodeSelector like:
+```
+ nodeSelector:
+    <key>: <values> 
+```
+
+## nodeAffinity
+in the values of yaml. add nodeaffinity like:
+
+```
+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
+```
+## podAffinity
+in the values.yaml add pod affinity/antiaffinity like:
+
+```
+affinity:
+    podAffinity:
+      requiredDuringSchedulingIgnoredDuringExecution:
+      - labelSelector:
+          matchExpressions:
+          - key: security
+            operator: In
+            values:
+            - S1
+        topologyKey: topology.kubernetes.io/zone
+    podAntiAffinity:
+      preferredDuringSchedulingIgnoredDuringExecution:
+      - weight: 100
+        podAffinityTerm:
+          labelSelector:
+            matchExpressions:
+            - key: security
+              operator: In
+              values:
+              - S2
+          topologyKey: topology.kubernetes.io/zone
+```
+
+
+

tests/test-values.yml

@@ -2,7 +2,7 @@ istio:
   enabled: true
 
 imagePullSecrets:
-- name: private-registry-mil
+- name: private-registry
 
 console:
   persistence: