Add hpa resource (#13)

templates/deployment.yaml

@@ -13,7 +13,9 @@ metadata:
   annotations: {{- include "common.tplvalues.render" ( dict "value" .Values.commonAnnotations "context" $ ) | nindent 4 }}
   {{- end }}
 spec:
+  {{- if not .Values.autoscaling.enabled }}
   replicas: {{ .Values.replicaCount }}
+  {{- end }}
   {{- if .Values.updateStrategy }}
   strategy: {{- toYaml .Values.updateStrategy | nindent 4 }}
   {{- end }}

templates/hpa.yaml

@@ -0,0 +1,44 @@
+{{- /*
+Copyright Broadcom, Inc. All Rights Reserved.
+SPDX-License-Identifier: APACHE-2.0
+*/}}
+
+{{- if .Values.autoscaling.enabled }}
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ template "common.names.fullname" . }}
+  namespace: {{ include "common.names.namespace" . | quote }}
+  labels: {{- include "common.labels.standard" ( dict "customLabels" .Values.commonLabels "context" $ ) | nindent 4 }}
+  {{- if .Values.commonAnnotations }}
+  annotations: {{- include "common.tplvalues.render" ( dict "value" .Values.commonAnnotations "context" $ ) | nindent 4 }}
+  {{- end }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ template "common.names.fullname" . }}
+  minReplicas: {{ .Values.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.autoscaling.maxReplicas }}
+  metrics:
+    {{- if .Values.autoscaling.targetMemory }}
+    - type: Resource
+      resource:
+        name: memory
+        {{- if semverCompare "<1.23-0" (include "common.capabilities.kubeVersion" .) }}
+        targetAverageUtilization: {{ .Values.autoscaling.targetMemory }}
+        {{- else }}
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.autoscaling.targetMemory }}
+        {{- end }}
+    {{- end }}
+    {{- if .Values.autoscaling.targetCPU }}
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.autoscaling.targetCPU }}
+    {{- end }}
+{{- end }}

values.yaml

@@ -194,6 +194,19 @@ replicaCount: 1
 updateStrategy:
   type: RollingUpdate
   rollingUpdate: {}
+## Autoscaling parameters
+## @param autoscaling.enabled Enable autoscaling for NGINX deployment
+## @param autoscaling.minReplicas Minimum number of replicas to scale back
+## @param autoscaling.maxReplicas Maximum number of replicas to scale out
+## @param autoscaling.targetCPU Target CPU utilization percentage
+## @param autoscaling.targetMemory Target Memory utilization percentage
+##
+autoscaling:
+  enabled: false
+  minReplicas: "2"
+  maxReplicas: ""
+  targetCPU: ""
+  targetMemory: ""
 ## Example:
 ## resources:
 ##   requests: