Make Firebase and storage optional

README.md

@@ -103,7 +103,7 @@ This starts the backend on port `8000`, the frontend on `3000` and a PostgreSQL
 
 ## Helm Chart
 
-A Helm chart is provided under `charts/xslt-playground` to deploy the frontend and backend on Kubernetes. Before installing, create a secret with your Firebase credentials:
+A Helm chart is provided under `charts/xslt-playground` to deploy the frontend and backend on Kubernetes. By default it expects Firebase credentials and a PostgreSQL database. Before installing, create a secret with your Firebase credentials:
 
 ```bash
 kubectl create secret generic firebase-config \
@@ -115,5 +115,8 @@ Install the chart with:
 
 ```bash
 helm install xslt charts/xslt-playground
+# Disable Firebase or database support if desired
+# helm install xslt charts/xslt-playground --set firebase.enabled=false
+# helm install xslt charts/xslt-playground --set storage.enabled=false
 ```
 

charts/xslt-playground/README.md

@@ -7,16 +7,18 @@ This chart deploys the frontend and backend of xslt-playground.
 Key parameters in `values.yaml`:
 
 - `image.frontend` and `image.backend` – container images.
-- `firebaseSecretName` – name of the secret containing Firebase credentials.
-  - `firebase.credentialsKey` is mounted for the backend and referenced by
-    `GOOGLE_APPLICATION_CREDENTIALS`.
-  - `firebase.configKey` is used for the `VITE_FIREBASE_CONFIG` environment
-    variable of the frontend.
-- `databaseUrl` – connection string used by the backend.
+- `firebase.enabled` – set to `false` to disable Firebase integration entirely.
+  When enabled you must provide a secret named by `firebase.secretName` with the
+  keys `firebase.credentialsKey` and `firebase.configKey`. The backend mounts the
+  credentials file at `firebase.credentialsMountPath` and the frontend reads the
+  config JSON.
+- `storage.enabled` – disable database usage when `false`. If enabled the backend
+  gets `DATABASE_URL` from `storage.databaseUrl`; otherwise the environment
+  variable `DISABLE_DATABASE=true` is set.
 - `ingress` – configure ingress for the frontend service.
 - `hpa` – enable CPU-based autoscaling for both deployments.
 
-Create the secret before installing the chart:
+When `firebase.enabled` is true you must create the secret before installing the chart:
 
 ```bash
 kubectl create secret generic firebase-config \

charts/xslt-playground/templates/backend-deployment.yaml

@@ -21,21 +21,32 @@ spec:
           image: "{{ .Values.image.backend.repository }}:{{ .Values.image.backend.tag }}"
           imagePullPolicy: {{ .Values.image.backend.pullPolicy }}
           env:
+{{- if .Values.storage.enabled }}
             - name: DATABASE_URL
-              value: {{ .Values.databaseUrl | quote }}
+              value: {{ .Values.storage.databaseUrl | quote }}
+{{- else }}
+            - name: DISABLE_DATABASE
+              value: "true"
+{{- end }}
+{{- if .Values.firebase.enabled }}
             - name: GOOGLE_APPLICATION_CREDENTIALS
               value: {{ printf "%s/%s" .Values.firebase.credentialsMountPath .Values.firebase.credentialsKey | quote }}
+{{- end }}
           volumeMounts:
+{{- if .Values.firebase.enabled }}
             - name: firebase
               mountPath: {{ .Values.firebase.credentialsMountPath }}
               readOnly: true
+{{- end }}
           ports:
             - containerPort: {{ .Values.service.backend.port }}
+{{- if .Values.firebase.enabled }}
       volumes:
         - name: firebase
           secret:
-            secretName: {{ .Values.firebaseSecretName }}
+            secretName: {{ .Values.firebase.secretName }}
             items:
               - key: {{ .Values.firebase.credentialsKey }}
                 path: {{ .Values.firebase.credentialsKey }}
+{{- end }}
 

charts/xslt-playground/templates/frontend-deployment.yaml

@@ -23,11 +23,13 @@ spec:
           env:
             - name: VITE_BACKEND_URL
               value: http://{{ include "xslt-playground.fullname" . }}-backend:{{ .Values.service.backend.port }}
+{{- if .Values.firebase.enabled }}
             - name: VITE_FIREBASE_CONFIG
               valueFrom:
                 secretKeyRef:
-                  name: {{ .Values.firebaseSecretName }}
+                  name: {{ .Values.firebase.secretName }}
                   key: {{ .Values.firebase.configKey }}
+{{- end }}
           ports:
             - containerPort: {{ .Values.service.frontend.port }}
           resources: {{- toYaml .Values.resources.frontend | nindent 12 }}

charts/xslt-playground/templates/secret.yaml

@@ -1,11 +1,13 @@
+{{- if .Values.firebase.enabled }}
 apiVersion: v1
 kind: Secret
 metadata:
-  name: {{ .Values.firebaseSecretName }}
+  name: {{ .Values.firebase.secretName }}
   labels:
     {{- include "xslt-playground.labels" . | nindent 4 }}
 type: Opaque
 data:
   {{ .Values.firebase.credentialsKey }}: {{ .Values.firebase.credentials | default "" | b64enc | quote }}
   {{ .Values.firebase.configKey }}: {{ .Values.firebase.config | default "" | b64enc | quote }}
+{{- end }}
 

charts/xslt-playground/values.yaml

@@ -47,12 +47,14 @@ hpa:
     maxReplicas: 5
     targetCPUUtilizationPercentage: 80
 
-firebaseSecretName: firebase-config
 firebase:
+  enabled: true
+  secretName: firebase-config
   credentialsKey: service-account.json
   configKey: firebase-config.json
   credentialsMountPath: /var/secrets/firebase
 
-# Example database URL
-databaseUrl: postgres://postgres:postgres@db/xslt?sslmode=disable
+storage:
+  enabled: true
+  databaseUrl: postgres://postgres:postgres@db/xslt?sslmode=disable