feat(deploy): add HPA autoscaling rules for all services except email

Add HorizontalPodAutoscaler (autoscaling/v2) using CPU and memory utilization
metrics to all deployment templates: app, static, gitserver, git-hook,
operator, adminrpc. Email-worker is excluded as requested.

- CPU target: 80% average utilization
- Memory target: 80% average utilization
- Each service has per-service min/max replicas in values.yaml
- Operator autoscaling defaults to disabled (enabled: false)
- Conditional via {{ if .Values.<service>.autoscaling.enabled }}

deploy/templates/adminrpc-deployment.yaml

@@ -93,4 +93,35 @@ spec:
   selector:
     app.kubernetes.io/name: {{ include "gitdata.fullname" . }}-adminrpc
     app.kubernetes.io/instance: {{ .Release.Name }}
+{{- if .Values.adminrpc.autoscaling.enabled }}
+---
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "gitdata.fullname" . }}-adminrpc
+  namespace: {{ include "gitdata.namespace" . }}
+  labels:
+    app.kubernetes.io/name: {{ include "gitdata.fullname" . }}-adminrpc
+    app.kubernetes.io/instance: {{ .Release.Name }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ include "gitdata.fullname" . }}-adminrpc
+  minReplicas: {{ .Values.adminrpc.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.adminrpc.autoscaling.maxReplicas }}
+  metrics:
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.adminrpc.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.adminrpc.autoscaling.targetMemoryUtilizationPercentage }}
+{{- end }}
 {{- end }}

deploy/templates/app-deployment.yaml

@@ -108,4 +108,35 @@ spec:
   selector:
     app.kubernetes.io/name: {{ include "gitdata.fullname" . }}-app
     app.kubernetes.io/instance: {{ .Release.Name }}
+{{- if .Values.app.autoscaling.enabled }}
+---
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "gitdata.fullname" . }}-app
+  namespace: {{ include "gitdata.namespace" . }}
+  labels:
+    app.kubernetes.io/name: {{ include "gitdata.fullname" . }}-app
+    app.kubernetes.io/instance: {{ .Release.Name }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ include "gitdata.fullname" . }}-app
+  minReplicas: {{ .Values.app.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.app.autoscaling.maxReplicas }}
+  metrics:
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.app.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.app.autoscaling.targetMemoryUtilizationPercentage }}
+{{- end }}
 {{- end }}

deploy/templates/git-hook-deployment.yaml

@@ -103,4 +103,35 @@ spec:
           persistentVolumeClaim:
             claimName: {{ include "gitdata.fullname" . }}-shared-data
       {{- end }}
+{{- if .Values.gitHook.autoscaling.enabled }}
+---
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "gitdata.fullname" . }}-git-hook
+  namespace: {{ include "gitdata.namespace" . }}
+  labels:
+    app.kubernetes.io/name: {{ include "gitdata.fullname" . }}-git-hook
+    app.kubernetes.io/instance: {{ .Release.Name }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ include "gitdata.fullname" . }}-git-hook
+  minReplicas: {{ .Values.gitHook.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.gitHook.autoscaling.maxReplicas }}
+  metrics:
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.gitHook.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.gitHook.autoscaling.targetMemoryUtilizationPercentage }}
+{{- end }}
 {{- end }}

deploy/templates/gitserver-deployment.yaml

@@ -171,4 +171,35 @@ spec:
   selector:
     app.kubernetes.io/name: {{ $fullName }}-gitserver
     app.kubernetes.io/instance: {{ $.Release.Name }}
+{{- if $svc.autoscaling.enabled }}
+---
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ $fullName }}-gitserver
+  namespace: {{ $ns }}
+  labels:
+    app.kubernetes.io/name: {{ $fullName }}-gitserver
+    app.kubernetes.io/instance: {{ $.Release.Name }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ $fullName }}-gitserver
+  minReplicas: {{ $svc.autoscaling.minReplicas }}
+  maxReplicas: {{ $svc.autoscaling.maxReplicas }}
+  metrics:
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: {{ $svc.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        target:
+          type: Utilization
+          averageUtilization: {{ $svc.autoscaling.targetMemoryUtilizationPercentage }}
+{{- end }}
 {{- end }}

deploy/templates/operator-deployment.yaml

@@ -114,4 +114,35 @@ roleRef:
   kind: Role
   name: {{ include "gitdata.fullname" . }}-operator
   apiGroup: rbac.authorization.k8s.io
+{{- if .Values.operator.autoscaling.enabled }}
+---
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "gitdata.fullname" . }}-operator
+  namespace: {{ include "gitdata.namespace" . }}
+  labels:
+    app.kubernetes.io/name: {{ include "gitdata.fullname" . }}-operator
+    app.kubernetes.io/instance: {{ .Release.Name }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ include "gitdata.fullname" . }}-operator
+  minReplicas: {{ .Values.operator.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.operator.autoscaling.maxReplicas }}
+  metrics:
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.operator.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        target:
+          type: Utilization
+          averageUtilization: {{ .Values.operator.autoscaling.targetMemoryUtilizationPercentage }}
+{{- end }}
 {{- end }}

deploy/templates/static-deployment.yaml

@@ -117,4 +117,35 @@ spec:
   selector:
     app.kubernetes.io/name: {{ $fullName }}-static
     app.kubernetes.io/instance: {{ .Release.Name }}
+{{- if $svc.autoscaling.enabled }}
+---
+apiVersion: autoscaling/v2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ $fullName }}-static
+  namespace: {{ $ns }}
+  labels:
+    app.kubernetes.io/name: {{ $fullName }}-static
+    app.kubernetes.io/instance: {{ .Release.Name }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ $fullName }}-static
+  minReplicas: {{ $svc.autoscaling.minReplicas }}
+  maxReplicas: {{ $svc.autoscaling.maxReplicas }}
+  metrics:
+    - type: Resource
+      resource:
+        name: cpu
+        target:
+          type: Utilization
+          averageUtilization: {{ $svc.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        target:
+          type: Utilization
+          averageUtilization: {{ $svc.autoscaling.targetMemoryUtilizationPercentage }}
+{{- end }}
 {{- end }}

deploy/values.yaml

@@ -150,6 +150,13 @@ app:
       cpu: 100m
       memory: 256Mi
 
+  autoscaling:
+    enabled: true
+    minReplicas: 3
+    maxReplicas: 20
+    targetCPUUtilizationPercentage: 80
+    targetMemoryUtilizationPercentage: 80
+
   livenessProbe:
     path: /health
     port: 8080
@@ -217,6 +224,13 @@ static:
   tolerations: []
   affinity: {}
 
+  autoscaling:
+    enabled: true
+    minReplicas: 2
+    maxReplicas: 10
+    targetCPUUtilizationPercentage: 80
+    targetMemoryUtilizationPercentage: 80
+
 # =============================================================================
 # Gitserver – git daemon / SSH + HTTP server
 # =============================================================================
@@ -277,6 +291,13 @@ gitserver:
   tolerations: []
   affinity: {}
 
+  autoscaling:
+    enabled: true
+    minReplicas: 2
+    maxReplicas: 10
+    targetCPUUtilizationPercentage: 80
+    targetMemoryUtilizationPercentage: 80
+
 # =============================================================================
 # Email worker – processes outgoing email queue
 # =============================================================================
@@ -361,6 +382,13 @@ gitHook:
   tolerations: []
   affinity: {}
 
+  autoscaling:
+    enabled: true
+    minReplicas: 2
+    maxReplicas: 10
+    targetCPUUtilizationPercentage: 80
+    targetMemoryUtilizationPercentage: 80
+
 # =============================================================================
 # Migrate – database migration Job (runOnce)
 # =============================================================================
@@ -399,6 +427,13 @@ operator:
   tolerations: []
   affinity: {}
 
+  autoscaling:
+    enabled: false
+    minReplicas: 2
+    maxReplicas: 5
+    targetCPUUtilizationPercentage: 80
+    targetMemoryUtilizationPercentage: 80
+
 # =============================================================================
 # Admin RPC – internal gRPC service for admin operations (k8s internal only)
 # =============================================================================
@@ -429,3 +464,10 @@ adminrpc:
   nodeSelector: {}
   tolerations: []
   affinity: {}
+
+  autoscaling:
+    enabled: true
+    minReplicas: 1
+    maxReplicas: 5
+    targetCPUUtilizationPercentage: 80
+    targetMemoryUtilizationPercentage: 80