apiVersion: v1
kind: Namespace
metadata:
  name: paperless
---
# 1. THE AUTOMATED CNPG POSTGRES CLUSTER
apiVersion: postgresql.cnpg.io/v1
kind: Cluster
metadata:
  name: paperless-db
  namespace: paperless
spec:
  instances: 1 # True 3-node HA across your mini-PCs! - edit down to 1, 3 overkill
  imageName: ghcr.io/cloudnative-pg/postgresql:16.4
  storage:
    size: 15Gi
    storageClass: longhorn
  bootstrap:
    initdb:
      database: paperless_prod
      owner: paperless_admin
  #affinity:
  #  enablePodAntiAffinity: true
  #  topologyKey: "kubernetes.io/hostname"
---
# 2. THE SIMPLE INDEPENDENT VALKEY CACHE
apiVersion: apps/v1
kind: Deployment
metadata:
  name: paperless-valkey
  namespace: paperless
spec:
  replicas: 1
  selector:
    matchLabels:
      app: paperless-valkey
  template:
    metadata:
      labels:
        app: paperless-valkey
    spec:
      containers:
        - name: valkey
          image: valkey/valkey:8.0-alpine
          args: ["--maxmemory", "256mb", "--maxmemory-policy", "allkeys-lru"]
          ports:
            - containerPort: 6379
---
apiVersion: v1
kind: Service
metadata:
  name: paperless-valkey-svc
  namespace: paperless
spec:
  ports:
    - port: 6379
  selector:
    app: paperless-valkey
---
# 3. THE PAPERLESS APPLICATION STORAGE
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: paperless-data-pvc
  namespace: paperless
spec:
  accessModes:
    - ReadWriteOnce
  storageClassName: longhorn
  resources:
    requests:
      storage: 30Gi
---
# 4. THE PAPERLESS APPLICATION CORE
apiVersion: apps/v1
kind: Deployment
metadata:
  name: paperless-ngx
  namespace: paperless
spec:
  replicas: 1
  selector:
    matchLabels:
      app: paperless-ngx
  template:
    metadata:
      labels:
        app: paperless-ngx
    spec:
      containers:
        - name: paperless
          image: ghcr.io/paperless-ngx/paperless-ngx:2.14
          ports:
            - containerPort: 8000
          env:
            - name: PAPERLESS_REDIS
              value: "redis://paperless-valkey-svc:6379"
            - name: PAPERLESS_DBENGINE
              value: "postgresql"
            - name: PAPERLESS_DBHOST
              value: "paperless-db-rw" # Automatically routes to the active HA primary pod
            - name: PAPERLESS_DBPORT
              value: "5432"
            - name: PAPERLESS_DBNAME
              value: "paperless_prod"
            - name: PAPERLESS_DBUSER
              value: "paperless_admin"
            - name: PAPERLESS_DBPASS
              valueFrom:
                secretKeyRef:
                  name: paperless-db-app # Automatically created by CNPG using cluster name
                  key: password
            # 👇 FIXES START HERE 👇
            - name: PAPERLESS_URL
              value: "https://paper.needlestack.boo" # Must match your sub-domain exactly (no trailing slash)
            - name: PAPERLESS_ALLOWED_HOSTS
              value: "paper.needlestack.boo" # Add this to let Django trust the incoming Host header
            - name: PAPERLESS_CSRF_TRUSTED_ORIGINS
              value: "https://paper.needlestack.boo" # Must match the full HTTPS URL
            # 👇 INJECT THIS RAW DJANGO OVERRIDE 👇
            - name: DJANGO_CSRF_TRUSTED_ORIGINS
              value: "https://paper.needlestack.boo"
            # 👇 ADD THESE TWO ENTRIES 👇
            - name: PAPERLESS_TRUSTED_PROXIES
              value: "10.42.0.0/16,10.43.0.0/16" # Trusts the internal k3s pod/service CIDR blocks
            - name: PAPERLESS_TIME_ZONE
              value: "Europe/London"
          volumeMounts:
            - name: paperless-storage
              mountPath: /usr/src/paperless/data
      volumes:
        - name: paperless-storage
          persistentVolumeClaim:
            claimName: paperless-data-pvc
---
apiVersion: v1
kind: Service
metadata:
  name: paperless-svc
  namespace: paperless
spec:
  ports:
    - port: 8000
  selector:
    app: paperless-ngx
---
# 5. THE INGRESS NETWORK ROUTING
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: paperless-ingress
  namespace: paperless
  annotations:
    cert-manager.io/cluster-issuer: "letsencrypt-production"
    nginx.ingress.kubernetes.io/backend-protocol: "HTTP"
    # 👇 ADD THESE THREE FOR CSRF / PROXY ALIGNMENT 👇
    nginx.ingress.kubernetes.io/proxy-body-size: "50m" # Essential later for uploading large PDFs!
    nginx.ingress.kubernetes.io/ssl-redirect: "true" # 👈 This handles forcing HTTPS routing safely
spec:
  ingressClassName: nginx
  tls:
    - secretName: paperless-tls-secret
      hosts:
        - paper.needlestack.boo
  rules:
  - host: paper.needlestack.boo
    http:
      paths:
      - path: /
        pathType: Prefix
        backend:
          service:
            name: paperless-svc
            port:
              number: 8000