feat(forgejo-runner): add hpa behavior support

Allows customizing HPA behaviors when autoscaling is enabled.

forgejo-runner/templates/hpa.yaml

@@ -12,6 +12,10 @@ spec:
     name: {{ include "forgejo-runner.fullname" . }}
   minReplicas: {{ .Values.autoscaling.minReplicas }}
   maxReplicas: {{ .Values.autoscaling.maxReplicas }}
+  {{- with .Values.autoscaling.behavior }}
+  behavior:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
   metrics:
     {{- if .Values.autoscaling.targetCPUUtilizationPercentage }}
     - type: Resource

forgejo-runner/values.yaml

@@ -191,6 +191,19 @@ autoscaling:
   enabled: false
   minReplicas: 1
   maxReplicas: 100
+  behavior: {}
+  # scaleDown:
+  #   stabilizationWindowSeconds: 300
+  #   policies:
+  #     - type: Pods
+  #       value: 1
+  #       periodSeconds: 60
+  # scaleUp:
+  #   stabilizationWindowSeconds: 0
+  #   policies:
+  #     - type: Pods
+  #       value: 1
+  #       periodSeconds: 60
   targetCPUUtilizationPercentage: 80
   # targetMemoryUtilizationPercentage: 80