[common] Add common chart from KaH

charts/common/templates/classes/_HorizontalPodAutoscaler.tpl

@@ -0,0 +1,37 @@
+{{/*
+This template serves as a blueprint for horizontal pod autoscaler objects that are created
+using the common library.
+*/}}
+{{- define "common.classes.hpa" -}}
+  {{- if .Values.autoscaling.enabled -}}
+    {{- $hpaName := include "common.names.fullname" . -}}
+    {{- $targetName := include "common.names.fullname" . }}
+---
+apiVersion: autoscaling/v2beta1
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ $hpaName }}
+  labels: {{- include "common.labels" $ | nindent 4 }}
+  annotations: {{- include "common.annotations" $ | nindent 4 }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: {{ include "common.names.controllerType" . }}
+    name: {{ .Values.autoscaling.target | default $targetName }}
+  minReplicas: {{ .Values.autoscaling.minReplicas | default 1 }}
+  maxReplicas: {{ .Values.autoscaling.maxReplicas | default 3 }}
+  metrics:
+    {{- if .Values.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: cpu
+        targetAverageUtilization: {{ .Values.autoscaling.targetCPUUtilizationPercentage }}
+    {{- end }}
+    {{- if .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        targetAverageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    {{- end }}
+  {{- end -}}
+{{- end -}}