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Jeremy Longshore
Jeremy Longshore

Posted on • Originally published at startaitools.com

Self-Hosting n8n on Contabo VPS: Enterprise Automation for $0/Month

#n8n #selfhosting #automation #devops

We just deployed a production-ready n8n instance at n8n.intentsolutions.io with zero monthly software costs. Here's the complete technical architecture and deployment process.

The Business Case

Before: Paying $20+/month for n8n Cloud
After: $0/month on existing Contabo VPS
Setup Time: 2 hours
ROI: Infinite (one-time setup, zero recurring cost)

Architecture Overview 

┌─────────────────────────────────────┐
│   n8n.intentsolutions.io (DNS)      │
│   ↓                                  │
│   194.113.67.242:443 (HTTPS)        │
│   ↓                                  │
│   Caddy Reverse Proxy               │
│   - Auto SSL (Let's Encrypt)        │
│   - Port 443 (HTTPS)                │
│   ↓                                  │
│   Docker Container: n8n             │
│   - Port 5678 (internal)            │
│   - SQLite database                 │
│   - Persistent data: ./data         │
│   - Backups: ./backups              │
└─────────────────────────────────────┘
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Technical Challenge: Port Conflicts

The server was already running:

  • Port 80: Apache2 (existing web server)
  • Port 443: Needed for n8n HTTPS
  • Port 8080: Caddy file browser

Solution: Configure Caddy with auto_https disable_redirects to handle HTTPS only without requiring port 80:

{
    auto_https disable_redirects
}

n8n.intentsolutions.io:443 {
    reverse_proxy localhost:5678
}
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Docker Configuration

Key decisions for production stability:

Network Mode: host (avoids port mapping conflicts)

services:
  n8n:
    image: n8nio/n8n:latest
    network_mode: "host"
    environment:
      - N8N_HOST=n8n.intentsolutions.io
      - N8N_PROTOCOL=https
      - WEBHOOK_URL=https://n8n.intentsolutions.io/
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Database: SQLite (perfect for single-user/small team)

environment:
  - DB_TYPE=sqlite
  - DB_SQLITE_VACUUM_ON_STARTUP=true
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Workflow Import Process

Imported 15 workflows using n8n CLI:

# Prepare workflows (remove problematic fields)
jq 'del(.id, .versionId, .tags) | . + {active: false}' workflow.json > clean.json

# Copy to container
docker cp workflows/ n8n:/tmp/

# Import via CLI
docker exec -u node n8n n8n import:workflow --separate --input=/tmp/workflows/
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Result: Successfully imported:

  • Daily Energizer Article Generator V4
  • Tech/AI News Pipeline
  • Lead Follow-up System (with Bland.ai integration)
  • AI Blog Journalist
  • Upwork Proposal Generator
  • Disposable Marketplace
  • Gmail Drive Organizer

SSL Certificate Automation

Caddy automatically obtains SSL certificates from Let's Encrypt on first HTTPS request. No manual certificate management required.

Certificate Location: /var/lib/caddy/.local/share/caddy/certificates/

Security Hardening

  1. Basic Authentication: Enabled with secure password
  2. HTTPS Enforced: All traffic over SSL
  3. Firewall: UFW configured for port 443
  4. Environment Variables: Secrets stored in .env (not committed)
  5. API Token: Generated for programmatic access

Performance & Monitoring

Resource Usage:

  • Memory: ~200MB (n8n container)
  • CPU: Minimal (idle workflows)
  • Storage: SSD on Contabo VPS

Monitoring Commands:

# Container health
docker ps | grep n8n

# Logs
docker logs -f n8n

# Disk usage
du -sh data/ backups/
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Cost Comparison

Option Monthly Cost Setup Time Maintenance
n8n Cloud $20-50+ 5 minutes Zero
Self-Hosted $0 2 hours Minimal
Annual Savings $240-600 One-time Backups only

Backup Strategy 

# Weekly backup script
tar -czf "n8n-backup-$(date +%Y%m%d).tar.gz" ./data
mv n8n-backup-*.tar.gz ./backups/

# Cleanup old backups (30 days)
find ./backups/ -name "n8n-backup-*.tar.gz" -mtime +30 -delete
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Lessons Learned

1. Use Existing Infrastructure

We had Caddy already running - adding n8n was just one more config block. Don't deploy redundant services.

2. Network Mode Matters

host networking avoided all port mapping complexity. Sometimes the simple solution is best.

3. SQLite is Underrated

For single-user or small team, SQLite is perfect. No PostgreSQL overhead needed.

4. CLI Import > API

The n8n CLI handled workflow imports reliably. The API had validation issues with exported JSON structure.

Related Posts

Next Steps

  1. Migrate to PostgreSQL (if team grows beyond 5 users)
  2. Set up CI/CD for workflow version control
  3. Configure monitoring/alerts for workflow failures
  4. Implement automated backups to cloud storage

Conclusion

Self-hosting n8n on existing infrastructure eliminated $240-600/year in SaaS costs while maintaining full control over data and workflows. The 2-hour setup investment pays for itself in the first month.

Business Impact:

  • ✅ Zero recurring automation costs
  • ✅ Complete data ownership
  • ✅ Custom domain with SSL
  • ✅ 15 production workflows migrated
  • ✅ Enterprise-grade infrastructure

Repository: n8n-workflows

Want to eliminate your SaaS costs while maintaining enterprise capabilities? Let's talk about self-hosted automation architecture for your business.

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