Pod Affinity with hosts and zone changes

charts/microservice/examples/affinity.yaml → charts/microservice/examples/affinity_az.values.yaml

@@ -24,9 +24,23 @@ deployment:
       memory: 500Mi
       cpu: 500m
   affinity:
-    enabled: false # Set to false to disable podAntiAffinity
+    enabled: true # Set to false to disable podAntiAffinity
+    preferred:
+      enabled: false
+    required:
+      enabled: true
+
+  hpa:
+    enabled: true
+    minReplicas: 1
+    maxReplicas: 2
+    targetCPU: 80
+    targetMemory: 80
+
   topologySpreadConstraints:
-    enabled: false # Set to false to disable topologySpreadConstraints
+    enabled: true
+    whenUnsatisfiable: "DoNotSchedule" # Options: "DoNotSchedule", "ScheduleAnyway"
+
   volumes:
     enabled: true
     configMaps:

charts/microservice/examples/affinity_hosts.values.yaml

@@ -0,0 +1,53 @@
+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: true # Set to false to disable podAntiAffinity
+    preferred:
+      enabled: false
+    required:
+      enabled: true
+    topologyKey: "topology.kubernetes.io/hostname" 
+
+  hpa:
+    enabled: true
+    minReplicas: 1
+    maxReplicas: 2
+    targetCPU: 80
+    targetMemory: 80
+
+  topologySpreadConstraints:
+    enabled: true
+    whenUnsatisfiable: "DoNotSchedule" # Options: "DoNotSchedule", "ScheduleAnyway"
+    topologyKey: "topology.kubernetes.io/hostname"    
+
+  volumes:
+    enabled: true
+    configMaps:
+      - name: index
+        mountPath: /usr/share/nginx/html
+        data:
+          index.html: |
+            Hello! Opstree

charts/microservice/templates/deployment.yaml

@@ -100,23 +100,32 @@ spec:
       nodeSelector:
         {{- toYaml . | nindent 8 }}
       {{- end }}
-      {{- with .Values.deployment.affinity }}
+           {{- if .Values.deployment.affinity.enabled }}
       affinity:
-        {{- if .Values.deployment.affinity.enabled }}
+        {{- if or .Values.deployment.affinity.preferred.enabled .Values.deployment.affinity.required.enabled }}
         podAntiAffinity:
+          {{- if .Values.deployment.affinity.preferred.enabled }}
           preferredDuringSchedulingIgnoredDuringExecution:
           - weight: 100
             podAffinityTerm:
               labelSelector:
                 matchLabels:
                   app: {{ include "microservice.fullname" . }}
-              topologyKey: topology.kubernetes.io/zone
+              topologyKey: {{ .Values.deployment.affinity.topologyKey }}
+          {{- end }}
+          {{- if .Values.deployment.affinity.required.enabled }}
+          requiredDuringSchedulingIgnoredDuringExecution:
+          - labelSelector:
+              matchLabels:
+                app: {{ include "microservice.fullname" . }}-app
+            topologyKey: {{ .Values.deployment.affinity.topologyKey }}
+          {{- end }}
         {{- end }}
         {{- if .Values.deployment.topologySpreadConstraints.enabled }}
         topologySpreadConstraints:
           - maxSkew: 1
-            topologyKey: "topology.kubernetes.io/zone"
-            whenUnsatisfiable: "DoNotSchedule"
+            topologyKey: {{ .Values.deployment.topologySpreadConstraints.topologyKey }}
+            whenUnsatisfiable: "{{ .Values.deployment.topologySpreadConstraints.whenUnsatisfiable }}"
             labelSelector:
               matchLabels:
                 app: {{ include "microservice.fullname" . }}

charts/microservice/values.yaml

@@ -122,14 +122,13 @@ deployment:
 
   affinity: 
     enabled: true
-
-  topologySpreadConstraints:
-    enabled: true
+    preferred:
+      enabled: true
 
 hpa:
   enabled: true
-  minReplicas: 5
-  maxReplicas: 6
+  minReplicas: 2
+  maxReplicas: 3
   targetCPU: 80
   targetMemory: 80