feat(add-on): Supporting streamInterval configuration (#541)

http-add-on/README.md

@@ -124,6 +124,7 @@ their default values.
 | `scaler.resources.requests.cpu` | string | `"250m"` |  |
 | `scaler.resources.requests.memory` | string | `"20Mi"` |  |
 | `scaler.service` | string | `"external-scaler"` | The name of the Kubernetes `Service` for the scaler component |
+| `scaler.streamInterval` | int | `200` | Interval in ms for communicating IsActive to KEDA |
 | `scaler.tolerations` | list | `[]` | Tolerations for pod scheduling ([docs](https://kubernetes.io/docs/concepts/scheduling-eviction/taint-and-toleration/)) |
 
 ### Interceptor

http-add-on/templates/scaler/deployment.yaml

@@ -44,6 +44,8 @@ spec:
           value: "{{ .Chart.Name }}-{{ .Values.interceptor.admin.service }}"
         - name: KEDA_HTTP_SCALER_TARGET_ADMIN_PORT
           value: "{{ default 9091 .Values.interceptor.admin.port }}"
+        - name: KEDA_HTTP_SCALER_STREAM_INTERVAL_MS
+          value: "{{ .Values.scaler.streamInterval }}"
         resources:
           {{- toYaml .Values.scaler.resources | nindent 10 }}
       terminationGracePeriodSeconds: 10

http-add-on/values.yaml

@@ -45,6 +45,8 @@ scaler:
   healthPort: 9091
   # -- The number of "target requests" that the external scaler will report to KEDA for the interceptor's scaling metrics. See the [KEDA external scaler documentation](https://keda.sh/docs/2.4/concepts/external-scalers/) for details on target requests.
   pendingRequestsInterceptor: 200
+  # -- Interval in ms for communicating IsActive to KEDA
+  streamInterval: 200
   # -- Node selector for pod scheduling ([docs](https://kubernetes.io/docs/concepts/scheduling-eviction/assign-pod-node/))
   nodeSelector: {}
   # -- Tolerations for pod scheduling ([docs](https://kubernetes.io/docs/concepts/scheduling-eviction/taint-and-toleration/))