improve persistence config

hosting/k8s/helm/README.md

@@ -219,12 +219,15 @@ postgres:
 
 ## Persistence
 
-All services support persistent storage and allow you to control the storage class globally or per service:
+All services support persistent storage and allow you to control the storage class globally or per service. Our internal services (Registry) now support the full Bitnami persistence configuration pattern:
+
+### Basic Persistence Configuration
 
 ```yaml
 global:
   storageClass: "fast-ssd" # Default for all services
 
+# Bitnami chart services (simplified configuration)
 postgres:
   primary:
     persistence:
@@ -250,22 +253,66 @@ s3:
     enabled: true
     size: 10Gi
     storageClass: "objectstore-ssd" # Optional: override for S3
+```
 
+### Internal Services - Full Bitnami-Style Configuration
+
+Our internal services (Registry) support the complete Bitnami persistence configuration pattern:
+
+```yaml
+# Registry - Full persistence configuration options
 registry:
   persistence:
     enabled: true
+    # Name to assign the volume
+    volumeName: "data"
+    # Name of an existing PVC to use
+    existingClaim: ""
+    # The path the volume will be mounted at
+    mountPath: "/var/lib/registry"
+    # The subdirectory of the volume to mount to
+    subPath: ""
+    # PVC Storage Class for Registry data volume
+    storageClass: "registry-ssd"
+    # PVC Access Mode for Registry volume
+    accessModes:
+      - "ReadWriteOnce"
+    # PVC Storage Request for Registry volume
     size: 10Gi
-    storageClass: "registry-ssd" # Optional: override for Registry
+    # Annotations for the PVC
+    annotations:
+      backup.velero.io/backup-volumes: "data"
+    # Labels for the PVC
+    labels:
+      app.kubernetes.io/component: "storage"
+    # Selector to match an existing Persistent Volume
+    selector:
+      matchLabels:
+        tier: "registry"
+    # Custom PVC data source
+    dataSource:
+      name: "registry-snapshot"
+      kind: "VolumeSnapshot"
+      apiGroup: "snapshot.storage.k8s.io"
 
 # Shared persistent volume for worker token file
 persistence:
   shared:
     enabled: true
     size: 5Mi
+    accessMode: ReadWriteOnce
+    # accessMode: ReadWriteMany  # Use for cross-node deployment
+    storageClass: ""
+    retain: true # Prevents deletion on uninstall
 ```
 
-- If a per-service `storageClass` is set, it overrides the global value for that service only.
-- If neither is set, the cluster's default StorageClass is used.
+### Persistence Configuration Rules
+
+- **Service-level storageClass** overrides the global value for that service only
+- **Global storageClass** applies to all services that don't specify their own
+- **Cluster default** is used if neither global nor service-level storageClass is set
+- **Internal services** (Registry) support full Bitnami-style configuration
+- **Bitnami chart services** use their respective chart's configuration patterns
 
 ## Monitoring
 
@@ -517,13 +564,13 @@ helm upgrade --install trigger . \
     storageClass: "fast-nvme" # Default for all services
 
   postgres:
-    persistence:
-      primary:
+    primary:
+      persistence:
         size: 500Gi
 
   redis:
-    persistence:
-      master:
+    master:
+      persistence:
         size: 20Gi
 
   clickhouse:
@@ -534,9 +581,14 @@ helm upgrade --install trigger . \
     persistence:
       size: 200Gi
 
+  # Internal services support full Bitnami-style configuration
   registry:
     persistence:
+      enabled: true
       size: 100Gi
+      storageClass: "registry-ssd"
+      annotations:
+        backup.velero.io/backup-volumes: "data"
   ```
 
 ### 🏗️ High Availability (RECOMMENDED)

hosting/k8s/helm/templates/registry.yaml

@@ -70,8 +70,11 @@ spec:
           resources:
             {{- toYaml .Values.registry.resources | nindent 12 }}
           volumeMounts:
-            - name: registry-data
-              mountPath: /var/lib/registry
+            - name: {{ .Values.registry.persistence.volumeName }}
+              mountPath: {{ .Values.registry.persistence.mountPath }}
+              {{- if .Values.registry.persistence.subPath }}
+              subPath: {{ .Values.registry.persistence.subPath }}
+              {{- end }}
             {{- if .Values.registry.auth.enabled }}
             - name: registry-auth
               mountPath: /auth
@@ -84,19 +87,30 @@ spec:
             secretName: {{ include "trigger-v4.fullname" . }}-registry-auth
         {{- end }}
         {{- if not .Values.registry.persistence.enabled }}
-        - name: registry-data
+        - name: {{ .Values.registry.persistence.volumeName }}
           emptyDir: {}
+        {{- else if .Values.registry.persistence.existingClaim }}
+        - name: {{ .Values.registry.persistence.volumeName }}
+          persistentVolumeClaim:
+            claimName: {{ .Values.registry.persistence.existingClaim }}
         {{- end }}
   {{- if .Values.registry.persistence.enabled }}
   volumeClaimTemplates:
     - metadata:
-        name: registry-data
+        name: {{ .Values.registry.persistence.volumeName }}
+        {{- with .Values.registry.persistence.annotations }}
+        annotations:
+          {{- toYaml . | nindent 10 }}
+        {{- end }}
         labels:
           {{- $component := "registry" }}
           {{- include "trigger-v4.componentLabels" (dict "Chart" .Chart "Release" .Release "Values" .Values "component" $component) | nindent 10 }}
+          {{- with .Values.registry.persistence.labels }}
+          {{- toYaml . | nindent 10 }}
+          {{- end }}
       spec:
         accessModes:
-          - ReadWriteOnce
+          {{- toYaml .Values.registry.persistence.accessModes | nindent 10 }}
         resources:
           requests:
             storage: {{ .Values.registry.persistence.size }}
@@ -104,6 +118,14 @@ spec:
         {{- if $storageClass }}
         storageClassName: {{ $storageClass | quote }}
         {{- end }}
+        {{- with .Values.registry.persistence.selector }}
+        selector:
+          {{- toYaml . | nindent 10 }}
+        {{- end }}
+        {{- with .Values.registry.persistence.dataSource }}
+        dataSource:
+          {{- toYaml . | nindent 10 }}
+        {{- end }}
   {{- end }}
 ---
 apiVersion: v1

hosting/k8s/helm/values.yaml

@@ -439,9 +439,33 @@ registry:
   #   runAsNonRoot: true
   #   runAsUser: 1000
 
+  # Persistence configuration (Bitnami-style)
   persistence:
     enabled: true
+    # Name to assign the volume
+    volumeName: "data"
+    # Name of an existing PVC to use
+    existingClaim: ""
+    # The path the volume will be mounted at
+    mountPath: "/var/lib/registry"
+    # The subdirectory of the volume to mount to
+    subPath: ""
+    # PVC Storage Class for Registry data volume
+    storageClass: ""
+    # PVC Access Mode for Registry volume
+    accessModes:
+      - "ReadWriteOnce"
+    # PVC Storage Request for Registry volume
     size: 10Gi
+    # Annotations for the PVC
+    annotations: {}
+    # Labels for the PVC
+    labels: {}
+    # Selector to match an existing Persistent Volume
+    selector: {}
+    # Custom PVC data source
+    dataSource: {}
+
   service:
     type: ClusterIP
     port: 5000