pod Affinity

charts/microservice/Chart.yaml

@@ -7,3 +7,6 @@ appVersion: "0.1.2"
 maintainers:
   - name: ashwani-opstree
   - name: tripathishikha1
+  - name: khushimalhoz
+
+

charts/microservice/examples/affinity.yaml

@@ -0,0 +1,38 @@
+global:
+  namespace: "default"
+  # replicacount: 5
+  fullnameOverride: "webapp"
+
+deployment:
+  image:
+    name: nginx
+    tag: latest
+    pullPolicy: IfNotPresent
+  livenessProbe: 
+    httpGet:
+      path: "/"
+      port: http
+  readinessProbe: 
+    httpGet:
+      path: "/"
+      port: http
+  resources:
+    requests:
+      memory: 100Mi
+      cpu: 100m
+    limits:
+      memory: 500Mi
+      cpu: 500m
+  affinity:
+    enabled: false # Set to false to disable podAntiAffinity
+  topologySpreadConstraints:
+    enabled: false # Set to false to disable topologySpreadConstraints
+  volumes:
+    enabled: true
+    configMaps:
+      - name: index
+        mountPath: /usr/share/nginx/html
+        data:
+          index.html: |
+            Hello! Opstree
+

charts/microservice/examples/deploy-nginx.yaml

@@ -30,4 +30,3 @@ deployment:
         data:
           index.html: |
             Hello! Opstree
-

charts/microservice/templates/deployment.yaml

@@ -102,9 +102,25 @@ spec:
       {{- end }}
       {{- with .Values.deployment.affinity }}
       affinity:
-        {{- toYaml . | nindent 8 }}
-      {{- end }}
-      {{- with .Values.deployment.tolerations }}
-      tolerations:
-        {{- toYaml . | nindent 8 }}
+        {{- if .Values.deployment.affinity.enabled }}
+        podAntiAffinity:
+          preferredDuringSchedulingIgnoredDuringExecution:
+          - weight: 100
+            podAffinityTerm:
+              labelSelector:
+                matchLabels:
+                  app: {{ include "microservice.fullname" . }}
+              topologyKey: topology.kubernetes.io/zone
+        {{- end }}
+        {{- if .Values.deployment.topologySpreadConstraints.enabled }}
+        topologySpreadConstraints:
+          - maxSkew: 1
+            topologyKey: "topology.kubernetes.io/zone"
+            whenUnsatisfiable: "DoNotSchedule"
+            labelSelector:
+              matchLabels:
+                app: {{ include "microservice.fullname" . }}
+            minDomains: 2
+        {{- end }}
       {{- end }}
+

charts/microservice/values.yaml

@@ -120,12 +120,16 @@ deployment:
 
   tolerations: []
 
-  affinity: {}
+  affinity: 
+    enabled: true
+
+  topologySpreadConstraints:
+    enabled: true
 
 hpa:
   enabled: true
-  minReplicas: 1
-  maxReplicas: 1
+  minReplicas: 5
+  maxReplicas: 6
   targetCPU: 80
   targetMemory: 80