Allow Dex auto scaling

Signed-off-by: Petr Drastil <petr.drastil@gmail.com>

charts/argo-cd/templates/_helpers.tpl

@@ -67,6 +67,13 @@ Create argocd repo-server name and version as used by the chart label.
 {{- printf "%s-%s" (include "argo-cd.fullname" .) .Values.repoServer.name | trunc 63 | trimSuffix "-" -}}
 {{- end -}}
 
+{{/*
+Create argocd dex-server name and version as used by the chart label.
+*/}}
+{{- define "argo-cd.dex.fullname" -}}
+{{- printf "%s-%s" (include "argo-cd.fullname" .) .Values.dex.name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+
 {{/*
 Create the name of the controller service account to use
 */}}

charts/argo-cd/templates/dex/hpa.yaml

@@ -0,0 +1,28 @@
+{{- if and .Values.dex.enabled .Values.dex.autoscaling.enabled }}
+apiVersion: autoscaling/v2beta1
+kind: HorizontalPodAutoscaler
+metadata:
+  labels:
+    {{- include "argo-cd.labels" (dict "context" . "component" .Values.dex.name "name" (printf "%s-hpa" .Values.dex.name)) | nindent 4 }}
+  name: {{ template "argo-cd.dex.fullname" . }}-hpa
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ template "argo-cd.dex.fullname" . }}
+  minReplicas: {{ .Values.dex.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.dex.autoscaling.maxReplicas }}
+  metrics:
+    {{- with .Values.dex.autoscaling.targetMemoryUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        targetAverageUtilization: {{ . }}
+    {{- end }}
+    {{- with .Values.dex.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: cpu
+        targetAverageUtilization: {{ . }}
+    {{- end }}
+{{- end }}

charts/argo-cd/values.yaml

@@ -220,6 +220,13 @@ dex:
 
   replicas: 1
 
+  autoscaling:
+    enabled: false
+    minReplicas: 1
+    maxReplicas: 5
+    targetCPUUtilizationPercentage: 50
+    targetMemoryUtilizationPercentage: 50
+
   metrics:
     enabled: false
     service: