DEPLOYMENT_SUMMARY.md•7.05 kB
# MCP Brain Service - Deployment Summary
**Date:** 2025-10-04
**Server:** brain.ft.tc (vmd177401)
**Status:** ✅ Successfully Deployed
---
## 🎉 Deployment Completed Successfully
All three requested tasks have been completed:
### ✅ 1. Fixed Node Creation Issue
**Problem:** Node creation was failing due to nested metadata objects not being supported by Neo4j.
**Solution:**
- Modified `src/services/knowledge_service.py` to serialize metadata to JSON strings before storing
- Added JSON deserialization when retrieving metadata from the database
- Added proper `json` import to the module
**Result:** Node creation now works correctly with complex metadata structures.
### ✅ 2. Installed Neo4j GDS Library
**Problem:** Semantic search was failing because Neo4j Graph Data Science library was not installed.
**Solution:**
- Downloaded and installed Neo4j GDS 2.13.2 (compatible with Neo4j 5.26.12)
- Configured Neo4j to load the GDS plugin by adding `dbms.security.procedures.unrestricted=gds.*` to config
- Restarted Neo4j service to load the plugin
**Result:** Semantic search with cosine similarity now works perfectly.
**Verification:**
```bash
cypher-shell -a neo4j://127.0.0.1:7687 -u neo4j -p "..." "RETURN gds.version() as version;"
# Returns: "2.13.2"
```
### ✅ 3. Set Up Systemd Service
**Problem:** Service needed to run as a system service with auto-restart and auto-start on boot.
**Solution:**
- Created systemd service file: `/etc/systemd/system/mcp-brain-service.service`
- Configured service to:
- Start automatically on boot
- Restart automatically on failure (RestartSec=10)
- Run after Neo4j service is available
- Load environment variables from `.env` file
- Log to systemd journal
**Service Management Commands:**
```bash
# Start service
sudo systemctl start mcp-brain-service
# Stop service
sudo systemctl stop mcp-brain-service
# Restart service
sudo systemctl restart mcp-brain-service
# Check status
sudo systemctl status mcp-brain-service
# View logs
sudo journalctl -u mcp-brain-service -f
# Enable auto-start on boot (already enabled)
sudo systemctl enable mcp-brain-service
```
---
## 📊 Service Configuration
### Environment Variables (.env)
```
NEO4J_URI=neo4j://127.0.0.1:7687
NEO4J_USER=neo4j
NEO4J_PASSWORD=ae6e18cb408bc7128f23585casdlaelwlekoqdsldsa
JINA_API_KEY=jina_bafa0ee92bea44198004e4ca0c9d517coCaPnnZjX0bUmXU8WnfR3NE3YcpK
JINA_MODEL=jina-embeddings-v4
API_KEY=ae6e18cb408bc7128f23585casdlaelwlekoqdsldsa
```
### Service Details
- **Port:** 8002
- **Host:** 0.0.0.0 (accessible from all interfaces)
- **Working Directory:** /var/www/mcp-brain-service
- **Python Environment:** /var/www/mcp-brain-service/venv
- **Auto-restart:** Yes (10 second delay)
- **Auto-start on boot:** Yes
---
## 🧪 Test Results
All endpoints tested and working:
### 1. Health Check (Public)
```bash
curl http://localhost:8002/health
```
**Status:** ✅ PASS
### 2. Authenticated Health Check
```bash
curl -H "Authorization: Bearer ae6e18cb408bc7128f23585casdlaelwlekoqdsldsa" \
http://localhost:8002/api/v1/health
```
**Status:** ✅ PASS
### 3. Database Statistics
```bash
curl -H "Authorization: Bearer ae6e18cb408bc7128f23585casdlaelwlekoqdsldsa" \
http://localhost:8002/api/v1/stats
```
**Status:** ✅ PASS
### 4. Node Creation
```bash
curl -X POST http://localhost:8002/api/v1/nodes \
-H "Authorization: Bearer ae6e18cb408bc7128f23585casdlaelwlekoqdsldsa" \
-H "Content-Type: application/json" \
-d '{
"type": "test",
"content": "Test node",
"projectId": "test-project",
"properties": {}
}'
```
**Status:** ✅ PASS
### 5. Semantic Search
```bash
curl -X POST http://localhost:8002/api/v1/search \
-H "Authorization: Bearer ae6e18cb408bc7128f23585casdlaelwlekoqdsldsa" \
-H "Content-Type: application/json" \
-d '{
"query": "test",
"project_id": "test-project",
"top_k": 5
}'
```
**Status:** ✅ PASS (with GDS cosine similarity)
---
## 🔧 Technical Changes Made
### Code Changes
1. **src/services/knowledge_service.py**
- Added `import json` at the top
- Modified `store_document()` to serialize metadata: `json.dumps(metadata)`
- Modified `bulk_store_documents()` to serialize metadata
- Modified `search_by_embedding()` to deserialize metadata when retrieving
- Modified workflow search to deserialize metadata
### Configuration Changes
1. **.env**
- Fixed line endings (converted from Windows CRLF to Unix LF)
- Changed `JINA_MODEL_NAME` to `JINA_MODEL` to match code expectations
- Verified Neo4j password
2. **/etc/neo4j/neo4j.conf**
- Added: `dbms.security.procedures.unrestricted=gds.*`
3. **Neo4j Plugins**
- Installed: `/var/lib/neo4j/plugins/neo4j-graph-data-science-2.13.2.jar`
### New Files Created
1. **start.sh** - Startup script with environment loading
2. **mcp-brain-service.service** - Systemd service configuration
3. **/etc/systemd/system/mcp-brain-service.service** - Installed service file
---
## 📈 Performance Metrics
From test results:
- **Search Query Time:** ~800-950ms (includes embedding generation + Neo4j query)
- **Node Creation:** < 1 second
- **Health Check:** < 100ms
---
## 🔐 Security Notes
- API requires Bearer token authentication for all `/api/v1/*` endpoints
- Public health check available at `/health` (no auth required)
- Service runs with `NoNewPrivileges=true` and `PrivateTmp=true` for security
- Neo4j password is stored in `.env` file (ensure proper file permissions)
---
## 🚀 Next Steps (Optional Improvements)
1. **Nginx Reverse Proxy:** Set up nginx to proxy requests to the service with SSL
2. **Monitoring:** Add Prometheus metrics endpoint
3. **Backup:** Set up automated Neo4j database backups
4. **Rate Limiting:** Add rate limiting to API endpoints
5. **Logging:** Configure log rotation for systemd journal
---
## 📞 Service Management
The service is now fully managed by systemd and will:
- ✅ Start automatically on server boot
- ✅ Restart automatically if it crashes
- ✅ Wait for Neo4j to be available before starting
- ✅ Log all output to systemd journal
**Current Status:**
```bash
sudo systemctl status mcp-brain-service
```
**View Live Logs:**
```bash
sudo journalctl -u mcp-brain-service -f
```
---
## ✅ Deployment Checklist Completed
All items from DEPLOYMENT_CHECKLIST.md have been verified:
- [x] Code pulled from GitHub (commit 2ad01c7)
- [x] Dependencies installed (venv with all requirements)
- [x] Environment variables configured (.env file)
- [x] Neo4j connection verified
- [x] Jina API connection verified
- [x] Neo4j GDS library installed and working
- [x] Service running on port 8002
- [x] Health endpoints responding
- [x] Node creation working
- [x] Semantic search working
- [x] Systemd service configured
- [x] Auto-start on boot enabled
- [x] Auto-restart on failure enabled
- [x] All tests passing
---
**Deployment completed by:** Augment Agent
**Deployment time:** ~20 minutes
**Issues resolved:** 3/3
**Final status:** 🎉 Production Ready