From a4bbc8091e803435353df6d37cea10c9d5a0c73a Mon Sep 17 00:00:00 2001
From: Roman Aleksejuk <roman.aleksejuk@teliacompany.com>
Date: Thu, 13 Jun 2024 12:27:15 +0300
Subject: [PATCH] Add back the horizontal pod autoscaler to zitadel

---
 charts/zitadel/templates/hpa.yaml | 37 +++++++++++++++++++++++++++++++
 charts/zitadel/values.yaml        |  9 +++++++-
 2 files changed, 45 insertions(+), 1 deletion(-)
 create mode 100644 charts/zitadel/templates/hpa.yaml

diff --git a/charts/zitadel/templates/hpa.yaml b/charts/zitadel/templates/hpa.yaml
new file mode 100644
index 00000000..adfd077d
--- /dev/null
+++ b/charts/zitadel/templates/hpa.yaml
@@ -0,0 +1,37 @@
+{{- if .Values.autoscaling.enabled }}
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "zitadel.fullname" . }}
+  labels:
+    {{- include "zitadel.labels" . | nindent 4 }}
+    app.kubernetes.io/component: hpa
+  {{- with .Values.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ include "zitadel.fullname" . }}
+  minReplicas: {{ .Values.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.autoscaling.maxReplicas }}
+  metrics:
+    {{- if .Values.autoscaling.targetCPU }}
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.autoscaling.targetCPU }}
+    {{- end }}
+    {{- if .Values.autoscaling.targetMemory }}
+    - type: Resource
+      resource:
+        name: memory
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.autoscaling.targetMemory }}
+    {{- end }}
+{{- end }}
\ No newline at end of file
diff --git a/charts/zitadel/values.yaml b/charts/zitadel/values.yaml
index 21aaa456..0faa24ef 100644
--- a/charts/zitadel/values.yaml
+++ b/charts/zitadel/values.yaml
@@ -234,4 +234,11 @@ pdb:
   annotations: {}
 
 networkPolicies:
-  enabled: true
\ No newline at end of file
+  enabled: true
+
+autoscaling:
+  enabled: true
+  minReplicas: 3
+  maxReplicas: 11
+  targetCPU: 80
+  targetMemory: 80
\ No newline at end of file