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EZ-Homelab/docs/multi-server-deployment.md

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# Multi-Server Deployment with On-Demand Services
## Overview
This guide explains the **current multi-server architecture** where:
- **Core Server**: Handles external traffic (ports 80/443); runs DuckDNS, Traefik (multi-provider), Authelia
- **Additional Servers**: Run Sablier (lazy loading) with direct port exposure; no local Traefik
- **Manual Routing**: Core Traefik routes to IP:PORT combinations via YAML configuration files
- **Independent Management**: Each server manages its own containers with lazy loading
> **Note**: This document describes the current simplified architecture. Additional servers are "headless" - they expose ports directly without local reverse proxy.
## Architecture Diagram
```
┌─────────────────────────────────────────────────────────────────┐
│ 🌐 PUBLIC INTERNET │
│ HTTPS Traffic (Ports 80/443 forwarded from router) │
└─────────────────────────────┬────┬──────────────────────────────┘
│ |
HTTP(S) ▼ HTTPS
| |
┌─────────────────────────────┼────┼──────────────────────────────┐
│ CORE SERVER │ | │
| ▼ |
│ ┌───────────────┐ ┌──────────┐ ┌────────────────┐ │
│ │ Core Services │ │ Traefik │ │ Local Services │ │
│ │ Authelia │ ---- │ │ ---- │ │ │
│ │ DuckDNS │ │ │ │ │ │
│ └───────────────┘ └────┬─────┘ └────────────────┘ │
│ │ │
│ ┌──────────────┼────────────┐ │
│ │ Routes: │ │
│ │ • Local (labels) │ │
│ │ • Remote (YAML files) │ │
| | | |
| └──────────────┬────────────┘ |
| | |
└───────────────────────────────┼─────────────────────────────────┘
HTTP (internal network) │
No SSL/TLS encryption │
┌───────────────────────────────┼─────────────────────────────────┐
│ ADDITIONAL SERVER │
| |
│ ┌───────────────┐ ┌────────────────┐ ┌────────────────┐ │
│ │ Sablier │ │ Your Apps │ │ Dockge | |
│ │ lazy loading │ │ expose ports │ │ | |
│ │ │ │ │ │ | |
│ └───────────────┘ └────────────────┘ └────────────────┘ │
└─────────────────────────────────────────────────────────────────┘
```
### Traffic Flow Summary
1. **Internet → Core**: HTTPS (ports 80/443 forwarded from router)
2. **Core → Additional**: HTTP (internal network, no encryption needed)
3. **Additional → Core**: HTTP (direct response to core Traefik)
# Deployment Process
## Step 1: Deploy Core Server
On the core server, run `ez-homelab.sh`
* Use Option 1 to Install Prerequisites
* Then Option 2 to Deploy Core Server
This deploys: DuckDNS, Traefik(core), Authelia, Dashboards & Infrastructure
From Dockge you can start/stop any of the stacks or containers.
**Port Forwarding**:
- Forward ports 80 & 443 from your router
- Only this server requires port forwarding
## Step 2: Deploy Additional Server
On the additional server, run `ez-homelab.sh`
* Use Option 1 to Install Prerequisites
* Then Option 3 to Deploy Additional Server
This deploys: Sablier (lazy loading), Dashboards & Infrastructure
From Dockge you can start/stop any of the stacks or containers.
**No Port Forwarding Required**:
- Services are accessed through core server
## How It Works
### Traffic Flow
1. **User accesses** `https://sonarr.yourdomain.duckdns.org` (HTTPS from internet)
2. **Core Traefik** receives HTTPS request:
- Checks Authelia for authentication (SSO)
- Routes to additional server: `http://192.168.1.100:8989` (HTTP internally)
3. **Additional server** receives direct HTTP request:
- Service container receives request on exposed port
- If stopped, Sablier starts the container
- Shows loading page while container starts
4. **Service responds** directly back to core Traefik via HTTP, then HTTPS to user
### Key Points
- **External Traffic**: Always HTTPS (SSL/TLS encrypted)
- **Internal Traffic**: Always HTTP (no encryption needed on local network)
- **No Double Encryption**: Core Traefik terminates SSL, forwards plain HTTP internally
### Service Registration
When you deploy an additional server:
1. Services are deployed with exposed ports (no Traefik labels)
2. Core server creates YAML route files pointing to IP:PORT
3. Core Traefik loads routes automatically
4. Services become accessible at `https://servicename.hostname.yourdomain.duckdns.org`
### Key Benefits
- **Simplified Architecture**: No local Traefik on additional servers
- **Direct Port Access**: Services expose ports directly (no reverse proxy overhead)
- **Centralized Access**: All services accessed through one domain
- **Unified SSO**: Authelia on core server protects all services
- **Local Lazy Loading**: Sablier manages containers on each server independently