add hpa field to hpa spec (#75)

add hpa field to hpa spec (#75)

Author: olamilekan000

charts/agent/templates/hpa.yaml

@@ -29,4 +29,8 @@ spec:
           type: "Utilization"
           averageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
     {{- end }}
+  {{- if .Values.autoscaling.behavior }}
+  behavior:
+    {{- toYaml .Values.autoscaling.behavior | nindent 4 }}
+  {{- end }}
 {{- end }}

charts/server/templates/hpa.yaml

@@ -29,4 +29,8 @@ spec:
           type: "Utilization"
           averageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
     {{- end }}
+  {{- if .Values.autoscaling.behavior }}
+  behavior:
+    {{- toYaml .Values.autoscaling.behavior | nindent 4 }}
+  {{- end }}
 {{- end }}

values.yaml

@@ -260,6 +260,27 @@ agent:
     maxReplicas: 10
     targetCPUUtilizationPercentage: 80
     targetMemoryUtilizationPercentage: 80
+    behavior:
+      scaleDown:
+        stabilizationWindowSeconds: 300
+        policies:
+          - type: Percent
+            value: 50
+            periodSeconds: 60
+          - type: Pods
+            value: 2
+            periodSeconds: 60
+        selectPolicy: Min
+      scaleUp:
+        stabilizationWindowSeconds: 0
+        policies:
+          - type: Percent
+            value: 100
+            periodSeconds: 60
+          - type: Pods
+            value: 2
+            periodSeconds: 60
+        selectPolicy: Max
 
   podDisruptionBudget:
     {}
@@ -391,6 +412,27 @@ server:
     maxReplicas: 10
     targetCPUUtilizationPercentage: 80
     targetMemoryUtilizationPercentage: 80
+    behavior:
+      scaleDown:
+        stabilizationWindowSeconds: 300
+        policies:
+          - type: Percent
+            value: 50
+            periodSeconds: 60
+          - type: Pods
+            value: 2
+            periodSeconds: 60
+        selectPolicy: Min
+      scaleUp:
+        stabilizationWindowSeconds: 0
+        policies:
+          - type: Percent
+            value: 100
+            periodSeconds: 60
+          - type: Pods
+            value: 2
+            periodSeconds: 60
+        selectPolicy: Max
 
   podDisruptionBudget:
     {}