feat: allow to configure autoscaling

README.md

@@ -55,6 +55,7 @@ please refer to [the official krakend documentation](https://www.krakend.io/docs
 | Key | Type | Default | Description |
 |-----|------|---------|-------------|
 | affinity | object | `{}` | The affinity to use for the krakend pod |
+| autoscaling | object | `{"annotations":{},"behavior":{},"enabled":false,"maxReplicas":3,"minReplicas":1,"targetCPUUtilizationPercentage":50,"targetMemoryUtilizationPercentage":50}` | Configures HorizontalPodAutoscaler for your Deployment |
 | deploymentType | string | `"deployment"` | The deployment type to use for the krakend service Valid values are `deployment` and `rollout` |
 | extraVolumeMounts | array | `[]` | extraVolumeMounts allows you to mount extra volumes to the krakend pod |
 | extraVolumes | array | `[]` | extraVolumes allows you to mount extra volumes to the krakend pod |

templates/hpa.yaml

@@ -0,0 +1,39 @@
+{{- if and (eq .Values.deploymentType "deployment") .Values.autoscaling.enabled }}
+apiVersion: {{ ternary "autoscaling/v2" "autoscaling/v2beta2" (.Capabilities.APIVersions.Has "autoscaling/v2") }}
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "krakend.fullname" . }}
+  labels:
+    {{- include "krakend.labels" . | nindent 4 }}
+  {{- with .Values.autoscaling.annotations }}
+  annotations: {{ toYaml . | nindent 4 }}
+  {{- end }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ include "krakend.fullname" . }}
+  minReplicas: {{ .Values.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.autoscaling.maxReplicas }}
+  metrics:
+  {{- with .Values.autoscaling.targetMemoryUtilizationPercentage }}
+  - type: Resource
+    resource:
+      name: memory
+      target:
+        type: Utilization
+        averageUtilization: {{ . }}
+  {{- end }}
+  {{- with .Values.autoscaling.targetCPUUtilizationPercentage }}
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: {{ . }}
+  {{- end }}
+  {{- with .Values.autoscaling.behavior }}
+  behavior:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+{{- end }}

values.yaml

@@ -274,3 +274,25 @@ networkPolicies:
       # namespace: "namespace2"
       # -- Type of the network policy (ingress or egress)
       # type: "egress"
+
+# -- (object) Configures HorizontalPodAutoscaler for your Deployment
+autoscaling:
+  enabled: false
+  annotations: {}
+  minReplicas: 1
+  maxReplicas: 3
+  targetCPUUtilizationPercentage: 50
+  targetMemoryUtilizationPercentage: 50
+  behavior: {}
+  # scaleDown:
+  #   stabilizationWindowSeconds: 300
+  #   policies:
+  #   - type: Pods
+  #     value: 1
+  #     periodSeconds: 180
+  # scaleUp:
+  #   stabilizationWindowSeconds: 300
+  #   policies:
+  #   - type: Pods
+  #     value: 2
+  #     periodSeconds: 60