feat(helm): add HPA behavior and startup probe

helm/cosmo/charts/router/README.md

@@ -11,6 +11,7 @@ This is the official Helm Chart for the WunderGraph Cosmo Router.
 | additionalLabels | object | `{}` | Add labels to deployment (metadata.labels) |
 | additionalPodLabels | object | `{}` | Add labels to deployment pod template (spec.template.metadata.labels) |
 | affinity | object | `{}` |  |
+| autoscaling.behavior | object | `{}` |  |
 | autoscaling.enabled | bool | `false` |  |
 | autoscaling.maxReplicas | int | `100` |  |
 | autoscaling.minReplicas | int | `1` |  |
@@ -68,6 +69,7 @@ This is the official Helm Chart for the WunderGraph Cosmo Router.
 | priorityClassName | string | `""` | Set to existing PriorityClass name to control pod preemption by the scheduler |
 | probes.liveness | object | `{"httpGet":{"path":"/health/live","port":"http"},"initialDelaySeconds":10}` | Configure liveness probe |
 | probes.readiness | object | `{"httpGet":{"path":"/health/ready","port":"http"},"initialDelaySeconds":5}` | Configure readiness probe |
+| probes.startup | object | `{}` | Configure startup probe |
 | replicaCount | int | `1` |  |
 | resources | object | `{}` |  |
 | securityContext | object | `{}` |  |

helm/cosmo/charts/router/templates/deployment.yaml

@@ -211,6 +211,10 @@ spec:
           readinessProbe:
             {{- toYaml . | nindent 12 }}
           {{- end }}
+          {{- with .Values.probes.startup }}
+          startupProbe:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
           volumeMounts:
             {{- if .Values.existingConfigmap }}
             - name: router-config

helm/cosmo/charts/router/templates/hpa.yaml

@@ -29,4 +29,8 @@ spec:
           type: Utilization
           averageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
     {{- end }}
+  {{- with .Values.autoscaling.behavior }}
+  behavior:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
 {{- end }}

helm/cosmo/charts/router/values.yaml

@@ -143,6 +143,26 @@ autoscaling:
   maxReplicas: 100
   targetCPUUtilizationPercentage: 80
   # targetMemoryUtilizationPercentage: 80
+  behavior: {}
+    # Configures the HPA scaling behavior. When unset, Kubernetes applies its defaults
+    # (300s scale-down stabilization window, no scale-up window).
+    # Example of a custom scale up and scale down behavior:
+    # scaleUp:
+    #   stabilizationWindowSeconds: 180
+    #   selectPolicy: Min
+    #   policies:
+    #     - type: Pods
+    #       value: 2
+    #       periodSeconds: 60
+    #     - type: Percent
+    #       value: 50
+    #       periodSeconds: 60
+    # scaleDown:
+    #   stabilizationWindowSeconds: 120
+    #   policies:
+    #     - type: Percent
+    #       value: 50
+    #       periodSeconds: 60
 
 nodeSelector: {}
 
@@ -172,6 +192,8 @@ probes:
       path: /health/live
       port: http
     initialDelaySeconds: 10
+  # -- Configure startup probe
+  startup: {}
 
 global:
   helmTests: false