Building an AI-Powered Workflow Orchestration Stack: Open WebUI, n8n, Qdrant, and PostgreSQL
Many companies want to automate internal workflows with AI. Support tickets, bug reports, documentation search, customer questions, and developer tasks can all be partially automated.
In this guide we will build a simple but powerful AI workflow orchestration system using open-source tools:
- Open WebUI – internal AI interface for employees
- n8n – workflow orchestrator
- Qdrant – semantic search database for AI knowledge
- PostgreSQL – structured data storage
This stack lets you build things like:
- AI-assisted support ticket triage
- Internal company AI assistant
- Automated bug reporting workflows
- AI answering questions using company documentation
Everything here can run on one Linux server.
1. What We Are Building
Imagine a SaaS company workflow:
- A customer submits a support request.
- The system automatically:
- analyzes the request with AI
- searches company documentation
- creates internal tasks
- suggests a reply to support staff
2. Server Requirements
For a small company setup:
Recommended server:
- Ubuntu 22.04
- 16 GB RAM
- 4 CPU cores
- 100 GB disk
Install Docker first.
sudo apt update
sudo apt install docker.io docker-compose -y
3. Docker Compose Setup
version: "3"
services:
postgres:
image: postgres:15
environment:
POSTGRES_USER: ai
POSTGRES_PASSWORD: ai123
POSTGRES_DB: workflows
volumes:
- postgres_data:/var/lib/postgresql/data
ports:
- "5432:5432"
qdrant:
image: qdrant/qdrant
ports:
- "6333:6333"
volumes:
- qdrant_data:/qdrant/storage
n8n:
image: n8nio/n8n
ports:
- "5678:5678"
environment:
- DB_TYPE=postgresdb
- DB_POSTGRESDB_HOST=postgres
- DB_POSTGRESDB_DATABASE=workflows
- DB_POSTGRESDB_USER=ai
- DB_POSTGRESDB_PASSWORD=ai123
depends_on:
- postgres
open-webui:
image: ghcr.io/open-webui/open-webui:main
ports:
- "3000:8080"
volumes:
- openwebui_data:/app/backend/data
volumes:
postgres_data:
qdrant_data:
openwebui_data:
Start everything:
docker compose up -d
4. Access the Tools
Open WebUI: http://SERVER-IP:3000
n8n dashboard: http://SERVER-IP:5678
5. Add an AI Model
Open WebUI needs a model backend. The easiest option is to run Ollama on the host.
Install Ollama (local model server):
curl -fsSL https://ollama.com/install.sh | sh
Run a model:
ollama run llama3
6. Storing Knowledge in Qdrant
AI becomes much more useful when it can search company knowledge.
Examples of documents to store:
- Product documentation
- Support procedures
- API documentation
- Internal manuals
7. Creating the Workflow in n8n
Open the n8n dashboard. Create a new workflow.
Example automation: Webhook → AI Analysis → Knowledge Search → Store Ticket → Suggest Reply
Step 1: Webhook trigger
POST /support-ticket
Step 2: AI analysis
Send ticket text to the AI model.
Step 3: Knowledge search
Query Qdrant for similar documentation.
Step 4: Save ticket
Insert structured data into PostgreSQL.
Step 5: Suggested reply
The AI combines ticket content and documentation results to generate a draft response.
8. Example AI Prompt
You are a SaaS support assistant.
Customer message:
{{ticket_text}}
Relevant documentation:
{{qdrant_results}}
Write a clear support reply.
Do not invent information.
9. Real Company Use Cases
AI documentation assistant
Employees ask questions about internal systems.
Automated support classification
Tickets automatically routed to the correct team.
Developer bug report generation
AI extracts logs and creates developer tickets.
Customer onboarding assistant
AI answers new customer questions using documentation.
10. Why This Stack Works
- Open WebUI – Human interface to AI
- n8n – Automation and orchestration
- Qdrant – AI knowledge memory
- PostgreSQL – Structured business data
11. Final Advice
Start simple. Do not try to automate everything at once.
A good first project is: "AI suggests replies to support tickets."
Once that works, expand to:
- Ticket routing
- Knowledge search
- Developer workflows
This is exactly how many companies introduce AI into real business operations. Small automation steps, built on a solid foundation.