[radar-gateway] Made HorizontalPodAutoscaler configurable

charts/radar-gateway/Chart.yaml

@@ -2,7 +2,7 @@ apiVersion: v2
 appVersion: "0.7.1"
 description: A Helm chart for RADAR-base gateway. REST Gateway to Kafka, for incoming participant data. It performs authentication, authorization, content validation and decompression. For more details of the configurations, see https://github.com/RADAR-base/RADAR-Gateway/blob/master/gateway.yml.
 name: radar-gateway
-version: 1.1.4
+version: 1.1.5
 icon: "http://radar-base.org/wp-content/uploads/2022/09/Logo_RADAR-Base-RGB.png"
 sources:
 - https://github.com/RADAR-base/radar-helm-charts/tree/main/charts/radar-gateway

charts/radar-gateway/README.md

@@ -3,7 +3,7 @@
 # radar-gateway
 [![Artifact HUB](https://img.shields.io/endpoint?url=https://artifacthub.io/badge/repository/radar-gateway)](https://artifacthub.io/packages/helm/radar-base/radar-gateway)
 
-![Version: 1.1.4](https://img.shields.io/badge/Version-1.1.4-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 0.7.1](https://img.shields.io/badge/AppVersion-0.7.1-informational?style=flat-square)
+![Version: 1.1.5](https://img.shields.io/badge/Version-1.1.5-informational?style=flat-square) ![Type: application](https://img.shields.io/badge/Type-application-informational?style=flat-square) ![AppVersion: 0.7.1](https://img.shields.io/badge/AppVersion-0.7.1-informational?style=flat-square)
 
 A Helm chart for RADAR-base gateway. REST Gateway to Kafka, for incoming participant data. It performs authentication, authorization, content validation and decompression. For more details of the configurations, see https://github.com/RADAR-base/RADAR-Gateway/blob/master/gateway.yml.
 
@@ -69,6 +69,10 @@ A Helm chart for RADAR-base gateway. REST Gateway to Kafka, for incoming partici
 | readinessProbe.failureThreshold | int | `3` | Failure threshold for readinessProbe |
 | networkpolicy | object | check `values.yaml` | Network policy defines who can access this application and who this applications has access to |
 | serviceMonitor.enabled | bool | `true` | Enable metrics to be collected via Prometheus-operator |
+| hpa.enabled | bool | `true` | Enable HPA |
+| hpa.maxReplicas | string | `"5"` | Maximum number of replicas |
+| hpa.targetCPU | string | `"50"` | Target CPU utilization percentage |
+| hpa.targetMemory | string | `"1Gi"` | Target Memory utilization percentage |
 | managementportal_url | string | `"http://management-portal:8080/managementportal"` | URL of the management portal application |
 | schemaRegistry | string | `"http://cp-schema-registry:8081"` | Schema Registry URL |
 | max_requests | int | `1000` | Not used. To be confirmed |

charts/radar-gateway/templates/hpa.yaml

@@ -1,24 +1,32 @@
-{{- if semverCompare ">=1.23-0" .Capabilities.KubeVersion.GitVersion -}}
+{{- if .Values.hpa.enabled }}
 apiVersion: autoscaling/v2
-{{- else -}}
-apiVersion: autoscaling/v2beta2
-{{- end }}
 kind: HorizontalPodAutoscaler
 metadata:
   name: {{ include "radar-gateway.fullname" . }}
   labels:
 {{ include "radar-gateway.labels" . | indent 4 }}
 spec:
-  maxReplicas: 5
-  minReplicas: 1
   scaleTargetRef:
     apiVersion: apps/v1
     kind: Deployment
     name: {{ include "radar-gateway.fullname" . }}
+  minReplicas: {{ .Values.replicaCount }}
+  maxReplicas: {{ .Values.hpa.maxReplicas }}
   metrics:
+    {{- if .Values.hpa.targetCPU }}
     - type: Resource
       resource:
         name: cpu
         target:
           type: Utilization
-          averageUtilization: 50
+          averageUtilization: {{ .Values.hpa.targetCPU }}
+    {{- end }}
+    {{- if .Values.hpa.targetMemory }}
+    - type: Resource
+      resource:
+        name: memory
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.hpa.targetMemory }}
+    {{- end }}
+{{- end }}

charts/radar-gateway/values.yaml

@@ -183,6 +183,16 @@ serviceMonitor:
   # -- Enable metrics to be collected via Prometheus-operator
   enabled: true
 
+hpa:
+  # -- Enable HPA
+  enabled: true
+  # -- Maximum number of replicas
+  maxReplicas: "5"
+  # -- Target CPU utilization percentage
+  targetCPU: "50"
+  # -- Target Memory utilization percentage
+  targetMemory: "1Gi"
+
 # -- URL of the management portal application
 managementportal_url: http://management-portal:8080/managementportal
 # -- Schema Registry URL