charts/loki/templates/backend/hpa.yaml

{{- $isSimpleScalable := eq (include "loki.deployment.isScalable" .) "true" -}}
{{- $autoscalingv2 := .Capabilities.APIVersions.Has "autoscaling/v2" -}}
{{- if and $isSimpleScalable (not .Values.read.legacyReadTarget ) ( .Values.backend.autoscaling.enabled ) }}
{{- if $autoscalingv2 }}
apiVersion: autoscaling/v2
{{- else }}
apiVersion: autoscaling/v2beta1
{{- end }}
kind: HorizontalPodAutoscaler
metadata:
  name: {{ include "loki.backendFullname" . }}
  labels:
    {{- include "loki.backendLabels" . | nindent 4 }}
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: StatefulSet
    name: {{ include "loki.backendFullname" . }}   
  minReplicas: {{ .Values.backend.autoscaling.minReplicas }}
  maxReplicas: {{ .Values.backend.autoscaling.maxReplicas }}
  {{- with .Values.backend.autoscaling.behavior }}
  behavior:
    {{- toYaml . | nindent 4 }}
  {{- end }}
  metrics:
  {{- with .Values.backend.autoscaling.targetMemoryUtilizationPercentage }}
    - type: Resource
      resource:
        name: memory
        {{- if $autoscalingv2 }}
        target:
          type: Utilization
          averageUtilization: {{ . }}
        {{- else }}
        targetAverageUtilization: {{ . }}
        {{- end }}
  {{- end }}
  {{- with .Values.backend.autoscaling.targetCPUUtilizationPercentage }}
    - type: Resource
      resource:
        name: cpu
        {{- if $autoscalingv2 }}
        target:
          type: Utilization
          averageUtilization: {{ . }}
        {{- else }}
        targetAverageUtilization: {{ . }}
        {{- end }}
  {{- end }}
{{- end }}