73cb274160
- Implement multi-server Traefik + Sablier architecture - Add label-based automatic service discovery - Create separate Sablier stack deployment - Add remote server deployment workflow (Option 3) - Add 9 new functions for multi-server management - Remove deprecated config-templates folder - Replace hardcoded private data with placeholders - Update backup timestamp format to YY_MM_DD_hh_mm - Add markup.yml to .gitignore Breaking changes: - Removed Sablier from core docker-compose.yml (now separate stack) - Config templates moved from config-templates/ to docker-compose/core/ - REQUIRED_VARS now dynamic based on deployment type
286 lines
8.8 KiB
Markdown
286 lines
8.8 KiB
Markdown
# Multi-Server Implementation - COMPLETED
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**Implementation Date:** February 4, 2026
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**Status:** ✅ COMPLETE - All changes implemented and validated
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---
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## Implementation Summary
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Successfully implemented multi-server Traefik + Sablier architecture for EZ-Homelab. The system now supports:
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1. **Label-based automatic service discovery** - No manual YAML editing required
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2. **Multi-server Docker provider** - Traefik discovers containers on remote servers via TLS
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3. **Per-server Sablier instances** - Each server controls local lazy loading independently
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4. **Unified domain management** - All services under one DuckDNS wildcard domain
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5. **Secure Docker TLS** - Shared CA certificates for multi-server communication
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---
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## Changes Implemented
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### 1. File Structure Changes
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#### Deleted:
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- ✅ `config-templates/` folder (deprecated)
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#### Created:
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- ✅ `docker-compose/sablier/` - New standalone Sablier stack
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- `docker-compose.yml` - Sablier container with local Docker socket
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- `README.md` - Complete documentation
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#### Modified:
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- ✅ `docker-compose/core/docker-compose.yml` - Removed embedded Sablier service
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- ✅ `scripts/common.sh` - Added 4 new multi-server functions
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- ✅ `scripts/ez-homelab.sh` - Added 5 new functions + updated workflow
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- ✅ `.env.example` - Already contained REMOTE_SERVER_* variables
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---
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### 2. New Functions Added
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#### common.sh (4 functions)
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```bash
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detect_server_role() # Detects if server is core or remote
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generate_traefik_provider_config() # Creates Docker provider config for remote server
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generate_sablier_middleware_config() # Creates Sablier middleware for remote server
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add_remote_server_to_traefik() # Registers remote server with core Traefik
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```
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#### ez-homelab.sh (5 functions)
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```bash
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check_docker_installed() # Pre-flight check for Docker
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set_required_vars_for_deployment() # Dynamic REQUIRED_VARS based on deployment type
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deploy_remote_server() # Complete remote server deployment workflow
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register_remote_server_with_core() # SSH to core server for registration
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deploy_sablier_stack() # Deploy Sablier stack (used by both core and remote)
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```
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---
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### 3. Workflow Changes
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#### main() Function Updates:
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- ✅ Added Docker pre-check before Options 2 and 3
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- ✅ Calls `set_required_vars_for_deployment()` dynamically
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- ✅ Option 2: Sets `REQUIRED_VARS` for core deployment
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- ✅ Option 3: Sets `REQUIRED_VARS` for remote deployment, calls `deploy_remote_server()`
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#### deploy_core() Function Updates:
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- ✅ Automatically deploys Sablier stack after core deployment
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- ✅ Updated config paths from `config-templates/*` to `docker-compose/core/*`
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- ✅ Fixed backup timestamp format: `YY_MM_DD_hh_mm`
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#### Backup Logic Verification:
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- ✅ Backups correctly create from `/opt/stacks/core/` (deployed location, not repo)
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- ✅ Format: `traefik.backup.26_02_04_14_30/`
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---
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## Architecture Overview
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### Core Server (Option 2)
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```
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Core Server
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├── Traefik (discovers all servers)
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│ ├── Local Docker provider (this server)
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│ ├── Remote Docker provider (auto-registered)
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│ └── Dynamic configs in /opt/stacks/core/traefik/dynamic/
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├── Authelia (SSO for all servers)
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├── DuckDNS (wildcard domain)
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└── Sablier (manages local lazy loading)
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```
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### Remote Server (Option 3)
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```
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Remote Server
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├── Docker API (TLS port 2376)
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│ └── Shares CA with core server
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├── Sablier (manages local lazy loading)
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└── Services with Traefik labels
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└── Auto-discovered by core Traefik
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```
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### Service Discovery Flow
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```
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1. Remote server deployed → Docker TLS configured → Sablier deployed
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2. Remote server registers with core → Creates Traefik provider config
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3. Traefik polls remote Docker API → Discovers labeled containers
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4. User accesses https://service.domain.duckdns.org
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5. Core Traefik routes to remote service
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6. SSL certificate issued by core Traefik
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```
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---
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## Required Variables by Deployment Type
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### Core Deployment (Option 2):
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```bash
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SERVER_IP
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SERVER_HOSTNAME
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DUCKDNS_SUBDOMAINS
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DUCKDNS_TOKEN
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DOMAIN
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DEFAULT_USER
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DEFAULT_PASSWORD
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DEFAULT_EMAIL
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```
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### Remote Deployment (Option 3):
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```bash
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SERVER_IP # This remote server
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SERVER_HOSTNAME # This remote server
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DUCKDNS_DOMAIN # Shared domain
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DEFAULT_USER # Local user
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REMOTE_SERVER_IP # Core server IP
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REMOTE_SERVER_HOSTNAME # Core server hostname
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REMOTE_SERVER_USER # Core server SSH user
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```
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---
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## Testing Checklist
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### Pre-Implementation Tests:
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- ✅ Bash syntax validation (`bash -n scripts/*.sh`)
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- ✅ Docker Compose syntax validation
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- ✅ No errors in VS Code
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### Post-Implementation Tests Required:
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- ⏳ Deploy core server (Option 2)
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- ⏳ Verify Sablier stack auto-deployed
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- ⏳ Verify shared CA generated
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- ⏳ Deploy remote server (Option 3)
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- ⏳ Verify Docker TLS configured
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- ⏳ Verify registration with core
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- ⏳ Deploy test service on remote with labels
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- ⏳ Verify Traefik discovers service
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- ⏳ Verify SSL certificate issued
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- ⏳ Verify lazy loading works
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---
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## Key Implementation Details
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### 1. Sablier Container Name
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- Changed from `sablier-service` to `sablier` (consistent naming)
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- Only connects to local Docker socket (no remote DOCKER_HOST)
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- Each server runs independent Sablier instance
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### 2. REQUIRED_VARS Mechanism
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- Reused existing `validate_and_prompt_variables()` function
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- Made REQUIRED_VARS dynamic via `set_required_vars_for_deployment()`
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- No duplicate validation functions created
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### 3. Docker Pre-Check
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- Added `check_docker_installed()` before deployment options
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- Prevents confusing errors during deployment
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- Guides users to Option 1 if Docker missing
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### 4. Traefik Provider Configuration
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- Auto-generated in `/opt/stacks/core/traefik/dynamic/`
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- Format: `docker-provider-{hostname}.yml`
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- Traefik auto-reloads within 2 seconds
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### 5. Remote Server Registration
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- Uses SSH to run functions on core server
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- Sources common.sh on core to access functions
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- Creates provider and Sablier middleware configs
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- Restarts Traefik to apply changes
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---
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## Files Modified Summary
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| File | Lines Changed | Status |
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|------|---------------|--------|
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| `scripts/common.sh` | +130 | ✅ Complete |
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| `scripts/ez-homelab.sh` | +200 | ✅ Complete |
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| `docker-compose/core/docker-compose.yml` | -38 | ✅ Complete |
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| `docker-compose/sablier/docker-compose.yml` | +19 | ✅ Created |
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| `docker-compose/sablier/README.md` | +77 | ✅ Created |
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| `config-templates/` | Entire folder | ✅ Deleted |
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**Total Lines of Code:** ~430 lines added/modified
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---
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## Documentation Updates Needed
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The following documentation should be updated:
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- [ ] README.md - Add multi-server architecture section
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- [ ] Quick reference guide - Update deployment options
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- [ ] Troubleshooting guide - Add multi-server scenarios
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---
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## Next Steps
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1. **Test on Raspberry Pi 4** - Verify resource constraints handled properly
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2. **Create example service** - Document label structure for remote services
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3. **Update RoadMap.md** - Mark investigation items as complete
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4. **Performance testing** - Verify timeout handling on Pi 4
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---
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## Notes for Future Maintenance
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### Adding New Remote Server:
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1. Run Option 3 on new server
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2. Script automatically registers with core
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3. Deploy services with proper labels
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### Removing Remote Server:
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1. Delete provider config: `/opt/stacks/core/traefik/dynamic/docker-provider-{hostname}.yml`
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2. Delete Sablier config: `/opt/stacks/core/traefik/dynamic/sablier-middleware-{hostname}.yml`
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3. Traefik auto-reloads
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### Debugging:
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- Check Traefik logs: `docker logs traefik`
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- Check dynamic configs: `/opt/stacks/core/traefik/dynamic/`
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- Verify Docker TLS: `docker -H tcp://remote-ip:2376 --tlsverify ps`
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- Check Sablier logs: `docker logs sablier`
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---
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## Implementation Validation
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### Syntax Checks:
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```bash
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✅ bash -n scripts/ez-homelab.sh
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✅ bash -n scripts/common.sh
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✅ docker compose -f docker-compose/core/docker-compose.yml config -q
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✅ docker compose -f docker-compose/sablier/docker-compose.yml config -q
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```
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### Code Quality:
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- ✅ No VS Code errors/warnings
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- ✅ Follows existing code patterns
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- ✅ Reuses existing functions appropriately
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- ✅ Proper error handling
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- ✅ Debug logging included
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- ✅ User-friendly messages
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---
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## Success Criteria - ALL MET ✅
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- [x] Sablier in separate stack (not embedded in core)
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- [x] Container named "sablier" (not "sablier-service")
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- [x] No prompt_for_server_role() function (unnecessary)
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- [x] Reused existing validate_and_prompt_variables()
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- [x] Dynamic REQUIRED_VARS based on deployment type
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- [x] Compose changes in repo files (not script overrides)
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- [x] Backup from /opt/stacks/ (not repo)
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- [x] Timestamp format: YY_MM_DD_hh_mm
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- [x] Docker pre-check before deployment
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- [x] Config-templates folder deleted
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- [x] All functions properly documented
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---
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**Implementation Complete!** 🎉
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Ready for deployment testing on target hardware (Raspberry Pi 4 4GB).
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