docs: example of docling-serve deployment in the RQ engine mode (#321)

Signed-off-by: Viktor Kuropiatnyk <[email protected]>
Signed-off-by: Michele Dolfi <[email protected]>
Co-authored-by: Michele Dolfi <[email protected]>

Author: vku-ibm

docs/deploy-examples/docling-serve-rq-workers.yaml

@@ -0,0 +1,192 @@
+# This example deployment configures Docling Serve with a Service and RQ workers
+
+# Create following secret
+# kubectl create secret generic docling-serve-rq-secrets --from-literal=REDIS_PASSWORD=myredispassword --from-literal=RQ_REDIS_URL=redis://:myredispassword@docling-serve-redis-service:6373/
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: docling-serve
+  labels:
+    app: docling-serve
+    component: docling-serve-api
+spec:
+  ports:
+  - name: http
+    port: 5001
+    targetPort: http
+  selector:
+    app: docling-serve
+    component: docling-serve-api
+---
+kind: Deployment
+apiVersion: apps/v1
+metadata:
+  name: docling-serve
+  labels:
+    app: docling-serve
+    component: docling-serve-api
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: docling-serve
+      component: docling-serve-api
+  template:
+    metadata:
+      labels:
+        app: docling-serve
+        component: docling-serve-api
+    spec:
+      restartPolicy: Always
+      containers:
+        - name: api
+          resources:
+            limits:
+              cpu: 1
+              memory: 8Gi
+            requests:
+              cpu: 250m
+              memory: 1Gi
+          env:
+            - name: DOCLING_SERVE_ENABLE_UI
+              value: 'true'
+            - name: DOCLING_SERVE_ENG_KIND
+              value: 'rq'
+            - name: DOCLING_SERVE_ENG_RQ_REDIS_URL
+              valueFrom:
+                secretKeyRef:
+                  name: docling-serve-rq-secrets
+                  key: RQ_REDIS_URL
+          ports:
+            - name: http
+              containerPort: 5001
+              protocol: TCP
+          imagePullPolicy: Always
+          image: 'ghcr.io/docling-project/docling-serve-cpu'
+---
+kind: Deployment
+apiVersion: apps/v1
+metadata:
+  name: docling-serve-rq-workers
+  labels:
+    app: docling-serve-rq-workers
+    component: docling-serve-rq-worker
+spec:
+  replicas: 2
+  selector:
+    matchLabels:
+      app: docling-serve-rq-workers
+      component: docling-serve-rq-worker
+  template:
+    metadata:
+      labels:
+        app: docling-serve-rq-workers
+        component: docling-serve-rq-worker
+    spec:
+      restartPolicy: Always
+      containers:
+        - name: worker
+          resources:
+            limits:
+              cpu: 1
+              memory: 4Gi
+            requests:
+              cpu: 250m
+              memory: 1Gi
+          env:
+            - name: DOCLING_SERVE_ENG_KIND
+              value: 'rq'
+            - name: DOCLING_SERVE_ENG_RQ_REDIS_URL
+              valueFrom:
+                secretKeyRef:
+                  name: docling-serve-rq-secrets
+                  key: RQ_REDIS_URL
+          ports:
+            - name: http
+              containerPort: 5001
+              protocol: TCP
+          imagePullPolicy: Always
+          image: 'ghcr.io/docling-project/docling-serve-cpu'
+          command: ["docling-serve"]
+          args: ["rq-worker"]
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: docling-serve-redis
+  labels:
+    app: docling-serve-redis
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: docling-serve-redis
+  template:
+    metadata:
+      labels:
+        app: docling-serve-redis
+    spec:
+      restartPolicy: Always
+      terminationGracePeriodSeconds: 30
+      containers:
+        - name: redis
+          resources:
+            limits:
+              cpu: 1
+              memory: 1Gi
+            requests:
+              cpu: 250m
+              memory: 100Mi
+          image: redis:latest
+          command: ["redis-server"]
+          args:
+            - "--port"
+            - "6373"
+            - "--dir"
+            - "/mnt/redis/data"
+            - "--appendonly"
+            - "yes"
+            - "--requirepass"
+            - "$(REDIS_PASSWORD)"
+          ports:
+            - containerPort: 6373
+          env:
+            - name: REDIS_PASSWORD
+              valueFrom:
+                secretKeyRef:
+                  name: docling-serve-rq-secrets
+                  key: REDIS_PASSWORD
+          volumeMounts:
+            - name: redis-data
+              mountPath: /mnt/redis/data
+          securityContext:
+            fsGroup: 1004
+            runAsNonRoot: true
+            allowPrivilegeEscalation: false
+            capabilities:
+              drop:
+                - ALL
+            seccompProfile:
+              type: RuntimeDefault
+      volumes:
+        - name: redis-data
+          emptyDir:
+            medium: Memory
+            sizeLimit: 2Gi
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: docling-serve-redis-service
+  labels:
+      app: docling-serve-redis
+spec:
+  type: NodePort
+  ports:
+    - name: redis-service
+      protocol: TCP
+      port: 6373
+      targetPort: 6373
+  selector:
+    app: docling-serve-redis

docs/deployment.md

@@ -225,6 +225,31 @@ curl -X 'POST' \
   }'
 ```
 
+### Multiple workers with RQ
+
+Manifest example: [`docling-serve-rq-workers.yaml`](./deploy-examples/docling-serve-rq-workers.yaml)
+
+This deployment example has the following features:
+
+- Deployment configuration
+- Service configuration
+- Redis deployment
+- Multiple (2 by default) worker Pods
+
+Install the app with:
+
+- create k8s secret:
+
+```sh
+kubectl create secret generic docling-serve-rq-secrets --from-literal=REDIS_PASSWORD=myredispassword --from-literal=RQ_REDIS_URL=redis://:myredispassword@docling-serve-redis-service:6373/
+```
+
+- apply deployment manifest:
+
+```sh
+oc apply -f docs/deploy-examples/docling-serve-rq-workers.yaml
+```
+
 ### Secure deployment with `oauth-proxy`
 
 Manifest example: [docling-serve-oauth.yaml](./deploy-examples/docling-serve-oauth.yaml)