12 KiB
Infrastructure Improvement Recommendations
Based on the infrastructure audit checklist, this document outlines recommended improvements for security, reliability, and operational efficiency.
Table of Contents
- High Priority Improvements
- Security Enhancements
- Reliability & Availability
- Monitoring & Observability
- Automation Opportunities
- Documentation & Knowledge Management
- Capacity Planning
- Cost Optimization
High Priority Improvements
1. Implement Automated Backups
Current State: Manual or ad-hoc backups Target State: Automated, scheduled backups with verification
Action Items:
- Set up automated Proxmox VM/Container backups (see
scripts/backup-proxmox.sh) - Configure automatic backup of VPS configurations
- Implement off-site backup sync (to cloud storage or remote location)
- Schedule regular backup restoration tests
- Set up backup monitoring and alerting
Priority: 🔴 Critical Estimated Effort: 4-8 hours Benefits: Data loss prevention, faster disaster recovery
2. SSL Certificate Auto-Renewal
Current State: Manual certificate management Target State: Automated certificate renewal with monitoring
Action Items:
- Install and configure certbot with auto-renewal
- Set up certbot systemd timer:
systemctl enable certbot.timer - Configure renewal hooks to reload services
- Monitor certificate expiration dates
- Consider wildcard certificates to simplify management
Priority: 🔴 Critical Estimated Effort: 2-4 hours Benefits: Prevent service outages from expired certificates
Implementation:
# Enable auto-renewal
sudo systemctl enable certbot.timer
sudo systemctl start certbot.timer
# Test renewal
sudo certbot renew --dry-run
# Add renewal hook for Pangolin
echo "systemctl reload pangolin" | sudo tee /etc/letsencrypt/renewal-hooks/deploy/reload-pangolin.sh
sudo chmod +x /etc/letsencrypt/renewal-hooks/deploy/reload-pangolin.sh
3. Implement Basic Monitoring
Current State: No centralized monitoring Target State: Uptime monitoring with alerts for critical services
Action Items:
- Deploy Uptime Kuma for service monitoring (lightweight, easy to set up)
- Configure health checks for all public services
- Set up alerting (email, SMS, or Slack)
- Monitor VPS resources (CPU, RAM, disk)
- Monitor Proxmox node resources
- Track Gerbil tunnel status
Priority: 🟠 High Estimated Effort: 4-6 hours Benefits: Early detection of issues, reduced downtime
See MONITORING.md for detailed setup instructions.
Security Enhancements
4. Harden SSH Access
Recommendations:
- Disable password authentication (key-only)
- Change default SSH port on VPS
- Implement fail2ban for brute force protection
- Use SSH certificate authority for easier key management
- Enable 2FA for SSH (Google Authenticator)
Implementation:
# /etc/ssh/sshd_config
PasswordAuthentication no
PubkeyAuthentication yes
PermitRootLogin prohibit-password
Port 2222 # Non-standard port
# Install fail2ban
sudo apt install fail2ban
sudo systemctl enable fail2ban
Priority: 🟠 High Estimated Effort: 2-3 hours
5. Implement Network Segmentation
Current State: Flat network Target State: VLANs separating different service tiers
Recommendations:
- VLAN 10: Management (Proxmox, OMV admin interfaces)
- VLAN 20: Production Services
- VLAN 30: Development/Testing
- VLAN 40: IoT/Untrusted devices
- Configure firewall rules between VLANs
Priority: 🟡 Medium Estimated Effort: 8-12 hours Benefits: Improved security, network isolation, easier troubleshooting
6. Secrets Management
Current State: Credentials in config files or documentation Target State: Centralized secrets management
Recommendations:
- Use environment variables for sensitive data
- Implement Bitwarden/Vaultwarden for password management
- Consider HashiCorp Vault for API keys and certificates
- Encrypt sensitive files with GPG or age
- Never commit secrets to git
Priority: 🟠 High Estimated Effort: 4-6 hours
7. Regular Security Updates
Recommendations:
- Enable unattended-upgrades for security patches
- Schedule monthly maintenance windows for updates
- Subscribe to security mailing lists for critical software
- Implement vulnerability scanning
Implementation:
# Enable automatic security updates
sudo apt install unattended-upgrades
sudo dpkg-reconfigure --priority=low unattended-upgrades
Priority: 🟠 High Estimated Effort: 2-3 hours
Reliability & Availability
8. Implement High Availability for Critical Services
Recommendations:
- Run critical services on both Proxmox nodes
- Set up floating IP or load balancing
- Configure automatic failover
- Use Proxmox HA features for critical VMs
Priority: 🟡 Medium Estimated Effort: 8-16 hours
9. Backup VPS Provider Relationship
Recommendations:
- Document procedures for spinning up with alternate VPS provider
- Keep configuration backups accessible outside primary VPS
- Test VPS migration annually
- Consider multi-region deployment for critical services
Priority: 🟡 Medium Estimated Effort: 4-6 hours
10. UPS and Power Management
Recommendations:
- Install UPS on all Proxmox nodes
- Configure Network UPS Tools (NUT) for graceful shutdown
- Test power failure procedures
- Document power-on sequence after outage
Priority: 🟠 High (if not already implemented) Estimated Effort: 3-4 hours (plus hardware cost)
Monitoring & Observability
11. Comprehensive Monitoring Stack
Recommendations:
- Deploy Prometheus for metrics collection
- Set up Grafana for visualization
- Configure Loki for log aggregation
- Implement Alertmanager for alerting
- Create dashboards for key metrics
Dashboards to Create:
- VPS resource utilization
- Proxmox cluster overview
- Storage capacity trends
- Service uptime and response times
- Gerbil tunnel status
Priority: 🟡 Medium Estimated Effort: 12-16 hours See: MONITORING.md
12. Centralized Logging
Recommendations:
- Aggregate logs from all services to central location
- Implement log retention policies
- Set up log-based alerts for errors
- Create log analysis dashboards
Priority: 🟡 Medium Estimated Effort: 6-8 hours
Automation Opportunities
13. Infrastructure as Code
Current State: Manual configuration Target State: Automated, version-controlled infrastructure
Recommendations:
- Document VPS setup as Ansible playbooks
- Use Terraform for DNS and cloud resources
- Create Proxmox VM templates with cloud-init
- Version control all automation
Priority: 🟡 Medium Estimated Effort: 16-24 hours Benefits: Reproducible infrastructure, faster recovery, documentation
14. Automated Health Checks
Recommendations:
- Create scheduled health check scripts (see
scripts/health-check.sh) - Automated service restart on failure
- Self-healing for common issues
- Integration with monitoring system
Priority: 🟡 Medium Estimated Effort: 4-6 hours
15. Certificate Management Automation
Recommendations:
- Automate certificate deployment to all services
- Automated service reloads after certificate renewal
- Certificate expiration monitoring
- Automated DNS validation for wildcard certs
Priority: 🟠 High Estimated Effort: 3-4 hours
Documentation & Knowledge Management
16. Living Documentation
Current State: Basic documentation Target State: Comprehensive, up-to-date documentation
Action Items:
- Complete infrastructure audit checklist
- Create RUNBOOK.md with operational procedures
- Create DISASTER-RECOVERY.md
- Create SERVICES.md
- Fill in all service details in SERVICES.md
- Document network topology diagram
- Create quick reference cards for common tasks
- Schedule quarterly documentation reviews
Priority: 🟠 High Estimated Effort: Ongoing
17. Runbook Automation
Recommendations:
- Convert manual procedures to scripts where possible
- Create interactive troubleshooting guides
- Document lessons learned from incidents
- Share knowledge across team
Priority: 🟡 Medium Estimated Effort: Ongoing
Capacity Planning
18. Resource Monitoring and Trending
Recommendations:
- Track resource utilization over time
- Set up alerts for capacity thresholds (80%, 90%)
- Create capacity planning reports
- Plan for growth based on trends
Metrics to Track:
- CPU utilization per node
- RAM usage per node
- Storage growth rate (OMV)
- Network bandwidth utilization
- Number of VMs/containers
Priority: 🟡 Medium Estimated Effort: 4-6 hours (plus ongoing)
19. Resource Right-Sizing
Recommendations:
- Review VM/container resource allocations
- Identify over-provisioned VMs
- Identify resource-constrained VMs
- Adjust allocations based on actual usage
Priority: 🟢 Low Estimated Effort: 2-4 hours
Cost Optimization
20. VPS Cost Review
Recommendations:
- Compare current VPS pricing with alternatives
- Consider reserved instances or annual billing
- Evaluate if all VPS resources are utilized
- Review bandwidth usage and overage costs
Priority: 🟢 Low Estimated Effort: 2-3 hours
21. Power Consumption Optimization
Recommendations:
- Enable CPU power management features
- Schedule non-critical services for off-peak hours
- Consider shutting down development VMs overnight
- Monitor power consumption
Priority: 🟢 Low Estimated Effort: 3-4 hours
Implementation Roadmap
Phase 1: Critical (Weeks 1-2)
- Automated backups with off-site storage
- SSL certificate auto-renewal
- SSH hardening and fail2ban
- Basic uptime monitoring
Phase 2: High Priority (Weeks 3-6)
- Comprehensive monitoring stack
- Security updates automation
- Secrets management
- Documentation completion
- Health check automation
Phase 3: Medium Priority (Weeks 7-12)
- Network segmentation with VLANs
- High availability for critical services
- Infrastructure as Code implementation
- Centralized logging
- Capacity planning processes
Phase 4: Ongoing
- Regular security audits
- Documentation maintenance
- Performance optimization
- Cost reviews
- DR testing
Success Metrics
Track the following to measure improvement:
| Metric | Current | Target |
|---|---|---|
| Mean Time To Recovery (MTTR) | _____ | < 1 hour |
| Backup success rate | _____ | 100% |
| Service uptime | _____ | 99.9% |
| Certificate renewal failures | _____ | 0 |
| Security patches applied within | _____ | 7 days |
| Unplanned outages per month | _____ | < 1 |
| Time to detect issues | _____ | < 5 minutes |
Notes
- Prioritize improvements based on your specific needs and risk tolerance
- Review and update this document quarterly
- Track implementation progress
- Measure impact of improvements
Last Updated: _____________ Next Review: _____________ Version: 1.0