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ArcDeploy Enhanced Features Documentation

Overview

ArcDeploy Enhanced provides improved deployment capabilities, security hardening, and better error handling based on the latest Hetzner Cloud API best practices and modern cloud-init configurations.

🚀 What's New in Enhanced Version

Enhanced Deployment Script (scripts/deploy-test-server-enhanced.sh)

Key Improvements

Feature Standard Version Enhanced Version
API Error Handling Basic error checking Retry logic with exponential backoff
Rate Limiting No handling Automatic retry on 429 errors
Server Validation Manual type checking API-based validation against current offerings
Cloud-Init Validation File existence check Size, format, and YAML syntax validation
Progress Monitoring Basic status checks Real-time progress with timeout handling
SSH Testing Manual connection Automated connectivity testing
Dry Run Mode Not available Preview changes without execution
Verbose Logging Basic output Detailed debug information

New Command-Line Options

# Enhanced deployment with options
./scripts/deploy-test-server-enhanced.sh [OPTIONS] <server_name> [server_type] [location]

# New options available:
--verbose           # Enable detailed logging
--dry-run          # Preview without executing
--delete <name>    # Delete server with confirmation
--list             # Show all ArcDeploy servers
--status <name>    # Detailed server information
--help             # Comprehensive help system

Advanced Server Type Mapping

# Friendly names map to specific server types
small      → cx11  # 1 vCPU, 4GB RAM  (€4.15/month)
medium     → cx21  # 2 vCPU, 8GB RAM  (€8.25/month)
standard   → cx31  # 2 vCPU, 8GB RAM  (€13.10/month) [RECOMMENDED]
large      → cx41  # 4 vCPU, 16GB RAM (€26.20/month)
xlarge     → cx51  # 8 vCPU, 32GB RAM (€52.40/month)

Enhanced Cloud-Init Configuration (cloud-init-enhanced.yaml)

Security Hardening

  • SSH Configuration: Modern cipher suites, key-only authentication
  • Fail2ban Protection: Advanced rules for SSH, Nginx, and application layers
  • Firewall Rules: UFW with logging and rate limiting
  • System Limits: Optimized file descriptors and process limits
  • Kernel Tuning: Network performance and security parameters

Monitoring & Maintenance

  • Health Checks: Comprehensive system and application monitoring
  • Log Rotation: Automatic log management to prevent disk space issues
  • Automated Maintenance: Weekly security updates and system cleanup
  • Resource Monitoring: Disk, memory, and network usage tracking

Application Enhancements

  • Nginx Security Headers: XSS protection, HSTS, content type validation
  • Rate Limiting: API endpoint protection and DDoS mitigation
  • Service Hardening: Systemd security features and sandboxing
  • Backup Preparation: Directory structure for automated backups

📊 Performance Improvements

API Call Enhancements

# Enhanced retry mechanism
api_call_with_retry() {
    # Handles rate limits (429)
    # Retries on server errors (5xx)
    # Exponential backoff with jitter
    # Detailed error reporting
}

Validation System

# Comprehensive validation pipeline
validate_cloud_init()    # Size and syntax checking
validate_server_type()   # API-based type validation
validate_location()      # Real-time location availability
check_server_name()      # Uniqueness verification

Health Monitoring

# Advanced health checking
/opt/blocklet-server/healthcheck.sh
- Service status monitoring
- Resource usage tracking
- Network connectivity testing
- Automatic service recovery

🔧 Usage Examples

Basic Enhanced Deployment

# Simple deployment with enhanced features
./scripts/deploy-test-server-enhanced.sh my-server

# Preview deployment without execution
./scripts/deploy-test-server-enhanced.sh --dry-run my-server large ash

# Verbose deployment for troubleshooting
./scripts/deploy-test-server-enhanced.sh --verbose my-server standard

Server Management

# List all ArcDeploy servers
./scripts/deploy-test-server-enhanced.sh --list

# Check specific server status
./scripts/deploy-test-server-enhanced.sh --status my-server

# Delete server with confirmation
./scripts/deploy-test-server-enhanced.sh --delete my-server

Environment Configuration

# Required environment variables
export HETZNER_TOKEN="your-hetzner-cloud-api-token"

# Optional SSH key configuration
export ARCDEPLOY_SSH_KEY="your-ssh-key-name"

🛡️ Security Features

SSH Hardening

# Enhanced SSH configuration
Port 2222                    # Non-standard port
PermitRootLogin no          # Root access disabled
PasswordAuthentication no    # Key-only authentication
MaxAuthTries 3              # Brute force protection
Modern cipher suites        # ChaCha20, AES-GCM

Network Security

# Fail2ban configuration
SSH protection:     3 attempts → 2 hour ban
HTTP auth:         6 attempts → 1 hour ban
DDoS protection:   200 req/min → 10 min ban
Application:       5 attempts → 1 hour ban

System Hardening

# Kernel security parameters
IP forwarding disabled
Source routing blocked
ICMP redirects ignored
Martian packet logging
TCP SYN cookies enabled

📈 Monitoring & Alerting

Health Check System

# Automated health monitoring
Service status:     Every 5 minutes
Resource usage:     Disk, memory, network
Application health: HTTP endpoint testing
Network connectivity: External ping tests

Log Management

# Centralized logging
Application logs:   /opt/blocklet-server/logs/
Health check logs:  /opt/blocklet-server/logs/health.log
System logs:        journalctl -u blocklet-server
Security logs:      /var/log/fail2ban.log

Maintenance Automation

# Weekly maintenance (Sundays 2 AM)
Package updates:    Security patches applied
Log rotation:       Prevents disk space issues
Health checks:      System verification
Security scans:     Rootkit detection

🔄 Migration Guide

From Standard to Enhanced

  1. Backup Current Configuration

    # Export current server list
./scripts/deploy-test-server.sh --list > servers-backup.txt

  2. Test Enhanced Script

    # Use dry-run mode first
./scripts/deploy-test-server-enhanced.sh --dry-run test-server

  3. Deploy New Servers

    # Create new servers with enhanced configuration
./scripts/deploy-test-server-enhanced.sh production-server large

  4. Update Existing Servers (Optional)

    # Manually apply cloud-init-enhanced.yaml to existing servers
# or redeploy with enhanced configuration

Configuration Files

# File structure comparison
Standard Version:
├── cloud-init.yaml                 # Basic configuration
├── scripts/deploy-test-server.sh   # Standard deployment

Enhanced Version:
├── cloud-init.yaml                 # Original (unchanged)
├── cloud-init-enhanced.yaml        # Enhanced configuration
├── scripts/deploy-test-server.sh   # Original (unchanged)
├── scripts/deploy-test-server-enhanced.sh  # Enhanced deployment
└── docs/enhanced-features.md       # This documentation

🐛 Troubleshooting

Common Issues

API Rate Limiting

# Enhanced script automatically handles rate limits
# Look for these messages in verbose mode:
Rate limit exceeded, retrying in X seconds...

Server Creation Failures

# Enhanced validation catches issues early:
Server type 'invalid' not available
Cloud-init file too large: X bytes (max: 65536)
Location 'xyz' not available

SSH Connection Issues

# Enhanced script tests SSH automatically:
SSH connection successful!
# OR
SSH connection test failed, but server may still be initializing
Try connecting manually: ssh -p 2222 arcblock@X.X.X.X

Debug Mode

# Enable maximum verbosity
./scripts/deploy-test-server-enhanced.sh --verbose --dry-run my-server

Health Check Debugging

# Manual health check execution
ssh -p 2222 arcblock@YOUR_SERVER_IP
sudo /opt/blocklet-server/healthcheck.sh

# View health check logs
tail -f /opt/blocklet-server/logs/health.log

📚 API Reference

Enhanced API Features

Retry Logic

  • Rate Limit Handling: Automatic retry with exponential backoff
  • Server Error Recovery: Retry on 5xx HTTP status codes
  • Network Error Handling: Retry on connection timeouts
  • Maximum Attempts: Configurable retry limit (default: 3)

Validation Pipeline

  • Server Type Validation: Real-time API checking
  • Location Validation: Current availability verification
  • Cloud-Init Validation: Size and format checking
  • Name Uniqueness: Conflict prevention

Monitoring Integration

  • Progress Tracking: Real-time deployment status
  • Health Verification: Automated service testing
  • Resource Monitoring: System resource checking
  • Error Recovery: Automatic restart capabilities

🏆 Best Practices

Deployment Workflow

  1. Pre-Deployment

    # Validate environment
./scripts/deploy-test-server-enhanced.sh --help

# Test with dry-run
./scripts/deploy-test-server-enhanced.sh --dry-run test-server

  2. Deployment

    # Deploy with monitoring
./scripts/deploy-test-server-enhanced.sh --verbose production-server large ash

  3. Post-Deployment

    # Verify deployment
./scripts/deploy-test-server-enhanced.sh --status production-server

# Test application
curl http://YOUR_SERVER_IP:8080

Security Recommendations

  1. Change Default Password: First login requires password change
  2. Configure SSH Keys: Add your public keys to cloud-init
  3. Review Firewall Rules: Customize UFW rules for your needs
  4. Enable Monitoring: Set up external monitoring for production
  5. Regular Updates: Use automated maintenance or manual updates

Performance Optimization

  1. Server Sizing: Use standard (cx31) for most workloads
  2. Location Selection: Choose closest datacenter to users
  3. Resource Monitoring: Watch disk and memory usage
  4. Log Management: Regular log rotation and cleanup
  5. Health Checks: Monitor application and system health

📞 Support

Getting Help

  • Documentation: /docs/ directory for comprehensive guides
  • Script Help: --help option for command-line reference
  • Health Checks: Built-in system diagnostics
  • Log Analysis: Centralized logging for troubleshooting

Reporting Issues

When reporting issues, include:

  • Command used (with --verbose output)
  • Server configuration details
  • Health check logs
  • System logs (journalctl -u blocklet-server)

ArcDeploy Enhanced - Taking your cloud deployments to the next level! 🚀