feat(HPA): Adds autoscaling config

OSC-1200

- Disabled by default for now.
- Tests to be followed.

Signed-off-by: Dhruv Shah <dhruv.shah@sumologic.com>

Author: dhruv-shah-sumo

deploy/helm/sumologic/templates/logs/otelcol/hpa.yaml

@@ -0,0 +1,41 @@
+{{- if .Values.sumologic.autoscaling.enabled }}
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ template "sumologic.metadata.name.logs.configmap" . }}
+  namespace: {{ template "sumologic.namespace"  . }}
+  labels:
+    app: {{ template "sumologic.labels.app.logs.configmap" . }}
+    {{- include "sumologic.labels.common" . | nindent 4 }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Statefulset
+    name: {{ template "sumologic.metadata.name.logs.service-headless" . }}
+  minReplicas: {{ .Values.sumologic.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.sumologic.autoscaling.maxReplicas }}
+  {{- if .Values.sumologic.autoscaling.behavior }}
+  behavior:
+    {{- toYaml .Values.sumologic.autoscaling.behavior | nindent 4 }}
+  {{- end }}
+  metrics:
+  {{- if .Values.sumologic.autoscaling.targetMemoryUtilizationPercentage }}
+  - type: Resource
+    resource:
+      name: memory
+      target:
+        type: Utilization
+        averageUtilization: {{ .Values.sumologic.autoscaling.targetMemoryUtilizationPercentage }}
+  {{- end }}
+  {{- if .Values.sumologic.autoscaling.targetCPUUtilizationPercentage }}
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: {{ .Values.sumologic.autoscaling.targetCPUUtilizationPercentage }}
+  {{- end }}
+  {{- with .Values.sumologic.autoscaling.additionalMetrics }}
+  {{- toYaml . | nindent 4 }}
+  {{- end }}
+  {{- end }}

deploy/helm/sumologic/values.yaml

@@ -74,7 +74,14 @@ sumologic:
 
   ## Enable autoscaling for components that support it: logs metadata, metrics metadata, metrics collector, otelcol instrumentation, and traces gateway
   autoscaling:
-    enabled: true
+    enabled: false
+    minReplicas: 1
+    maxReplicas: 5
+    targetCPUUtilizationPercentage: 80
+    # targetMemoryUtilizationPercentage: 70
+    behavior: {}
+    additionalMetrics: []
+
 
   ## If you set it to false, it would set EXCLUDE_NAMESPACE=<release-namespace>
   ## and not add the Otelcol logs and Prometheus remotestorage metrics.