Merge pull request #331 from younsl/hpa/behavior

feat: Support HPA spec.behavior for fine-grained scaling policies

Author: pierluigilenoci

helm/oauth2-proxy/Chart.yaml

@@ -1,5 +1,5 @@
 name: oauth2-proxy
-version: 7.16.0
+version: 7.17.0
 apiVersion: v2
 appVersion: 7.11.0
 home: https://oauth2-proxy.github.io/oauth2-proxy/
@@ -31,8 +31,8 @@ maintainers:
 kubeVersion: ">=1.16.0-0"
 annotations:
   artifacthub.io/changes: |
-    - kind: changed
-      description: Updated OAuth2-Proxy image to v7.11.0
+    - kind: added
+      description: Added support for HPA spec.behavior configuration for fine-grained scaling policies
       links:
         - name: Github PR
-          url: https://github.com/oauth2-proxy/manifests/pull/329
+          url: https://github.com/oauth2-proxy/manifests/pull/331

helm/oauth2-proxy/README.md

@@ -120,6 +120,7 @@ The following table lists the configurable parameters of the oauth2-proxy chart
 | `autoscaling.targetCPUUtilizationPercentage`          | Horizontal Pod Autoscaler setting.                                                                                                                                                                                                                               | `80`                                                                                                 |
 | `autoscaling.targetMemoryUtilizationPercentage`       | Horizontal Pod Autoscaler setting.                                                                                                                                                                                                                               | ``                                                                                                   |
 | `autoscaling.annotations`                             | Horizontal Pod Autoscaler annotations.                                                                                                                                                                                                                           | `{}`                                                                                                 |
+| `autoscaling.behavior`                                | Configure HPA behavior policies for scaling. See [docs](https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/#configuring-scaling-behavior)                                                                                                | `{}`                                                                                                 |
 | `alphaConfig.enabled`                                 | Flag to toggle any alpha config-related logic                                                                                                                                                                                                                    | `false`                                                                                              |
 | `alphaConfig.annotations`                             | Configmap annotations                                                                                                                                                                                                                                            | `{}`                                                                                                 |
 | `alphaConfig.serverConfigData`                        | Arbitrary configuration data to append to the server section                                                                                                                                                                                                     | `{}`                                                                                                 |

helm/oauth2-proxy/templates/hpa.yaml

@@ -35,4 +35,15 @@ spec:
           type: Utilization
           averageUtilization: {{ .Values.autoscaling.targetCPUUtilizationPercentage }}
     {{- end }}
+  {{- if .Values.autoscaling.behavior }}
+  behavior:
+    {{- with .Values.autoscaling.behavior.scaleDown }}
+    scaleDown:
+      {{- toYaml . | nindent 6 }}
+    {{- end }}
+    {{- with .Values.autoscaling.behavior.scaleUp }}
+    scaleUp:
+      {{- toYaml . | nindent 6 }}
+    {{- end }}
+  {{- end }}
 {{- end }}

helm/oauth2-proxy/values.yaml

@@ -319,8 +319,28 @@ autoscaling:
   minReplicas: 1
   maxReplicas: 10
   targetCPUUtilizationPercentage: 80
-#  targetMemoryUtilizationPercentage: 80
+  # targetMemoryUtilizationPercentage: 80
   annotations: {}
+  # Configure HPA behavior policies for scaling if needed
+  # Ref: https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale/#configuring-scaling-behavior
+  behavior: {}
+    # scaleDown:
+    #   stabilizationWindowSeconds: 300
+    #   policies:
+    #   - type: Percent
+    #     value: 100
+    #     periodSeconds: 15
+    #   selectPolicy: Min
+    # scaleUp:
+    #   stabilizationWindowSeconds: 0
+    #   policies:
+    #   - type: Percent
+    #     value: 100
+    #     periodSeconds: 15
+    #   - type: Pods
+    #     value: 4
+    #     periodSeconds: 15
+    #   selectPolicy: Max
 
 # Configure Kubernetes security context for pod
 # Ref: https://kubernetes.io/docs/tasks/configure-pod-container/security-context/