split db and app into two deployments

clusters/default/tools/paperless-ngx/paperless-ngx-db.yml

@@ -0,0 +1,30 @@
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: paperless-ngx-db
+  namespace: tools
+spec:
+  strategy:
+    type: Recreate
+  selector:
+    matchLabels:
+      app: paperless-ngx-db
+  template:
+    metadata:
+      labels:
+        app: paperless-ngx-db
+    spec:
+      containers:
+      - name: paperless-ngx-db
+        image: docker.io/library/redis:8
+        ports:
+        - containerPort: 6379
+        volumeMounts:
+        - name: data
+          mountPath: /data
+          subPath: redis
+      volumes:
+      - name: data
+        persistentVolumeClaim:
+          claimName: paperless-db-longhorn

clusters/default/tools/paperless-ngx/paperless-ngx-svc.yml

@@ -14,3 +14,16 @@ spec:
   ports:
   - port: 8001
     targetPort: 8000
+
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: paperless-ngx-db-service
+  namespace: tools
+spec:
+  selector:
+    app: paperless-ngx-db
+  ports:
+  - port: 6379
+    targetPort: 6379

clusters/default/tools/paperless-ngx/paperless-ngx.yml

@@ -16,15 +16,9 @@ spec:
         app: paperless-ngx
     spec:
       initContainers:
-      - name: paperless-ngx-db
-        image: docker.io/library/redis:8
-        restartPolicy: Always
-        ports:
-        - containerPort: 6379
-        volumeMounts:
-        - name: data
-          mountPath: /data
-          subPath: redis
+      - name: wait-for-redis
+        image: busybox:latest
+        command: ['sh', '-c', 'until nc -z paperless-ngx-db-service 6379; do echo waiting for redis; sleep 2; done;']
       containers:
       - name: paperless-ngx
         image: ghcr.io/paperless-ngx/paperless-ngx:2.20.1
@@ -32,7 +26,7 @@ spec:
         - containerPort: 8000
         env:
         - name: PAPERLESS_REDIS
-          value: "redis://localhost:6379"
+          value: "redis://paperless-ngx-db-service:6379"
         - name: PAPERLESS_URL
           valueFrom:
             secretKeyRef:

clusters/default/tools/paperless-ngx/paperless-pvc.yml

@@ -4,6 +4,21 @@ kind: PersistentVolumeClaim
 metadata:
   name: paperless-longhorn
   namespace: tools
+spec:
+  accessModes:
+    - ReadWriteOnce
+  volumeMode: Filesystem
+  resources:
+    requests:
+      storage: 2Gi
+  storageClassName: longhorn
+
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: paperless-db-longhorn
+  namespace: tools
 spec:
   accessModes:
     - ReadWriteOnce