🚀 CI/CD Deployment Strategies

A comprehensive collection of production-ready CI/CD deployment strategies for Next.js applications on VPS servers. Each strategy is battle-tested, secure, and optimized for different use cases.

📚 Table of Contents

• Quick Start
• Deployment Strategies Overview
• Strategy Comparison
• Monorepo Support
• Features
• Testing Status
• Roadmap
• Contributing
• License

🎯 Quick Start

Choose the deployment strategy that fits your needs:

Strategy	Best For	Setup Time	Link
Version 1	Simple apps, fast deployments	⚡ 5 min	v1-do-rsync-pm2
Version 1.5	Mission-critical apps, instant rollbacks	⚡ 5 min	v1.5-do-rsync-atomic-pm2
Version 2	Teams preferring Git-based workflows	⚡ 10 min	v2-do-git-pm2

📦 Deployment Strategies Overview

Version 1: Rsync + PM2 Cluster

Strategy: Build on CI → Rsync artifacts → PM2 zero-downtime reload

• ✅ Fastest deployment (no server-side build)
• ✅ Minimal server footprint (no source code on server)
• ✅ Zero downtime with PM2 cluster mode
• ✅ PR preview deployments support
• ✅ Staging environments support

Use when: You want the fastest, simplest deployment with maximum security.

📖 Full Documentation

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Version 1.5: Atomic Deployment (Rsync + Symlink)

Strategy: Build on CI → Upload to timestamped release → Atomic symlink switch

• ✅ Instant rollbacks (no rebuild needed)
• ✅ Partial failure protection (incomplete uploads don't break site)
• ✅ Release history (keep last 5 releases)
• ✅ Zero downtime deployments
• ✅ PR preview deployments support
• ✅ Staging environments support

Use when: You need instant rollback capability and maximum reliability.

📖 Full Documentation

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Version 2: Git Pull + Server Build

Strategy: GitHub Action triggers → Server pulls code → Server builds app

• ✅ Familiar Git workflow
• ✅ No artifact management needed
• ✅ Server-side builds (good for large monorepos)
• ✅ Automatic dependency updates

Use when: You prefer Git-based workflows and have sufficient server resources.

📖 Full Documentation

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🔍 Strategy Comparison

Security Comparison

Feature	Version 1	Version 1.5	Version 2
Source Code on Server	❌ No	❌ No	⚠️ Yes
SSH Key-Based Auth	✅ Yes	✅ Yes	✅ Yes
Restricted Deploy User	✅ Yes	✅ Yes	✅ Yes
Minimal Attack Surface	✅ Highest	✅ Highest	⚠️ Medium
Secrets Isolation	✅ Build-time	✅ Build-time	⚠️ Server-side

Winner: Version 1 & 1.5 (no source code on server)

Speed Comparison

Metric	Version 1	Version 1.5	Version 2
Deployment Time	⚡ ~30s	⚡ ~35s	🐢 ~2-5 min
Build Location	CI/CD	CI/CD	Server
Network Transfer	Small artifacts	Small artifacts	Full repo
Server CPU Usage	Minimal	Minimal	High (build)

Winner: Version 1 (fastest), Version 1.5 (slightly slower due to release management)

Reliability Comparison

Feature	Version 1	Version 1.5	Version 2
Rollback Speed	🐢 Rebuild required	⚡ Instant (symlink)	🐢 Rebuild required
Partial Failure Protection	⚠️ Medium	✅ High	⚠️ Medium
Release History	❌ No	✅ Yes (5 releases)	❌ No
Zero Downtime	✅ Yes	✅ Yes	✅ Yes

Winner: Version 1.5 (best reliability and rollback capability)

Resource Usage

Resource	Version 1	Version 1.5	Version 2
Server RAM	Low	Low	High (builds)
Server Disk	Low	Medium (releases)	Medium
Server CPU	Low	Low	High (builds)
CI/CD Minutes	Medium	Medium	Low

Winner: Version 1 (lowest resource usage)

Feature Comparison

Feature	Version 1	Version 1.5	Version 2
PR Preview Deployments	✅ Yes (single)	✅ Yes (single)	❌ No
PR Preview (Monorepo)	⚠️ Not implemented	⚠️ Not implemented	❌ No
Staging Environments	✅ Yes (single)	✅ Yes (single)	❌ No
Staging (Monorepo)	⚠️ Not implemented	⚠️ Not implemented	❌ No
Wildcard SSL Support	✅ Yes	✅ Yes	❌ No
Monorepo Support	✅ Yes	✅ Yes	❌ No
Git Pull Monorepo	❌ N/A	❌ N/A	❌ Not implemented

Winner: Version 1 & 1.5 (most features, but monorepo preview/staging missing)

⚠️ Note: PR preview and staging support for monorepos is planned but not yet implemented. See TODO.md for details.

🏰 Monorepo Support

Both Version 1 and Version 1.5 support monorepo deployments with:

• Path-based filtering (only deploy changed apps)
• Multiple apps on one server (isolated ports and PM2 processes)
• Independent deployments per app
• Shared preview infrastructure (one wildcard SSL cert)

📖 Monorepo Documentation - Version 1
📖 Monorepo Documentation - Version 1.5

✨ Features

All strategies support:

• ✅ Zero-downtime deployments with PM2
• ✅ Cluster mode for maximum performance
• ✅ SSH key-based authentication
• ✅ Restricted deploy users
• ✅ Nginx reverse proxy configuration
• ✅ SSL certificate setup (Let's Encrypt)
• ✅ Firewall configuration (UFW)
• ✅ Automatic PM2 process management

Version 1 & 1.5 additionally support:

• ✅ PR preview deployments (dynamic ports 8500-8999)
• ✅ Staging environments
• ✅ Wildcard SSL certificates (DigitalOcean & Cloudflare)
• ✅ Dynamic Nginx routing based on hostname

✅ Testing Status

Version 1: Rsync + PM2 Cluster

• Single app deployment tested
• Monorepo deployment tested
• PR preview deployment tested
• Staging deployment tested
• Rollback procedure tested
• SSL certificate renewal tested
• PM2 cluster mode verified
• Zero-downtime deployment verified
• Multi-region deployment tested
• Load testing performed

Version 1.5: Atomic Deployment

• Single app deployment tested
• Monorepo deployment tested
• PR preview deployment tested
• Staging deployment tested
• Instant rollback tested
• Partial failure recovery tested
• Release cleanup verified
• SSL certificate renewal tested
• Zero-downtime deployment verified
• Multi-region deployment tested
• Load testing performed

Version 2: Git Pull + Server Build

• Single app deployment tested
• Monorepo deployment tested
• PR preview deployment tested (⚠️ Not implemented)
• Staging deployment tested (⚠️ Not implemented)
• Build failure recovery tested
• Swap space handling verified
• Large repo performance tested
• SSL certificate renewal tested
• Zero-downtime deployment verified
• Multi-region deployment tested
• Load testing performed

Monorepo Versions

Version 1 Monorepo

• Multi-app deployment tested
• Path-based filtering verified
• PR preview deployment tested (⚠️ Not implemented)
• Staging deployment tested (⚠️ Not implemented)
• Independent app deployments verified
• Port isolation tested

Version 1.5 Monorepo

• Multi-app deployment tested
• Path-based filtering verified
• PR preview deployment tested (⚠️ Not implemented)
• Staging deployment tested (⚠️ Not implemented)
• Independent app deployments verified
• Atomic rollback per app tested
• Port isolation tested

🗺️ Roadmap

⚠️ Missing Features (High Priority)

These features are currently missing and should be prioritized:

PR Preview & Staging Support

• PR Preview for Monorepos

  • Version 1 monorepo PR preview workflows
  • Version 1.5 monorepo PR preview workflows
  • Per-app preview deployments in monorepo
  • Preview cleanup automation

• Staging for Monorepos

  • Version 1 monorepo staging workflows
  • Version 1.5 monorepo staging workflows
  • Per-app staging environments

• Version 2 (Git Pull) Missing Features

  • PR preview deployment support
  • Staging deployment support
  • Wildcard SSL certificate setup
  • Dynamic Nginx routing for previews

• Git Pull Monorepo Support

  • Complete monorepo setup script for Git Pull
  • Path-based filtering for Git Pull
  • Multiple apps on one server (Git Pull)
  • PR preview for Git Pull monorepo
  • Staging for Git Pull monorepo

📋 See TODO.md for detailed tracking of all missing features and implementation details.

Planned Features

Containerization & Orchestration

• Docker Support

  • Dockerfile templates for Next.js apps
  • Docker Compose setup for local development
  • Docker-based deployment workflows
  • Multi-stage builds optimization
  • Container registry integration (Docker Hub, GitHub Container Registry)

• Kubernetes Support

  • Kubernetes manifests (Deployment, Service, Ingress)
  • Helm charts for easy deployment
  • Kubernetes deployment workflows
  • Horizontal Pod Autoscaling (HPA)
  • Rolling update strategies
  • ConfigMap and Secret management
  • Service mesh integration (Istio/Linkerd)

• Container Orchestration Alternatives

  • Docker Swarm setup
  • Nomad deployment strategies
  • ECS/EKS deployment guides

Autoscaling & High Availability

• Horizontal Autoscaling

  • PM2-based autoscaling configuration
  • Load balancer setup (Nginx, HAProxy)
  • Multi-server deployment strategies
  • Health check endpoints
  • Auto-scaling based on CPU/memory metrics

• Vertical Autoscaling

  • Dynamic resource allocation
  • Memory optimization strategies
  • CPU optimization strategies

• High Availability

  • Multi-region deployment guides
  • Database replication strategies
  • Session management across servers
  • Failover mechanisms
  • Disaster recovery procedures

Advanced CI/CD Features

• PR Preview Deployments - Missing Implementations

  • PR preview support for monorepo (Version 1)
  • PR preview support for monorepo (Version 1.5)
  • PR preview support for Version 2 (Git Pull)
  • PR preview cleanup automation (remove old previews)
  • PR preview comment updates with deployment status
  • Preview deployment health checks

• Staging Deployments - Missing Implementations

  • Staging support for monorepo (Version 1)
  • Staging support for monorepo (Version 1.5)
  • Staging support for Version 2 (Git Pull)
  • Staging environment management
  • Staging to production promotion workflow

• Version 2 (Git Pull) Enhancements

  • PR preview deployments for Git Pull strategy
  • Staging deployments for Git Pull strategy
  • Wildcard SSL support for Git Pull strategy
  • Monorepo support for Git Pull strategy
  • Path-based filtering for monorepo Git Pull
  • Multiple apps on one server (Git Pull)

• Monorepo Enhancements

  • PR preview deployments (Version 1 monorepo)
  • PR preview deployments (Version 1.5 monorepo)
  • Staging deployments (Version 1 monorepo)
  • Staging deployments (Version 1.5 monorepo)
  • Cross-app dependency handling
  • Shared package deployment strategies

• Multi-Environment Support

  • Development environment setup
  • QA environment automation
  • Production environment strategies
  • Environment-specific configurations

• Advanced Deployment Strategies

  • Blue-Green deployments
  • Canary deployments
  • Feature flag integration
  • A/B testing infrastructure

• Monitoring & Observability

  • Application performance monitoring (APM)
  • Log aggregation (ELK, Loki)
  • Metrics collection (Prometheus, Grafana)
  • Error tracking (Sentry, Rollbar)
  • Uptime monitoring
  • Real-time alerting

• Security Enhancements

  • Automated security scanning
  • Dependency vulnerability checks
  • Secrets management (Vault, AWS Secrets Manager)
  • WAF (Web Application Firewall) integration
  • DDoS protection setup
  • Rate limiting strategies

Cloud Platform Integrations

• AWS

  • EC2 deployment guides
  • ECS/EKS integration
  • Lambda@Edge for edge functions
  • CloudFront CDN integration
  • Route53 DNS management

• Google Cloud Platform

  • Compute Engine deployment
  • GKE (Kubernetes Engine) integration
  • Cloud Run serverless option
  • Cloud CDN integration

• Azure

  • Azure VM deployment
  • AKS (Azure Kubernetes Service) integration
  • Azure Container Instances
  • Azure CDN integration

• DigitalOcean

  • Droplet deployment optimization
  • Kubernetes integration
  • App Platform integration
  • Spaces (S3-compatible) integration

• Cloudflare

  • Workers deployment
  • Pages integration
  • Tunnel setup for secure connections
  • DDoS protection configuration

Performance Optimizations

• CDN Integration

  • Cloudflare CDN setup
  • CloudFront configuration
  • Static asset optimization
  • Edge caching strategies

• Caching Strategies

  • Redis caching setup
  • Memcached integration
  • Application-level caching
  • Database query caching

• Database Optimization

  • Connection pooling
  • Read replicas setup
  • Database migration strategies
  • Backup and restore procedures

Developer Experience

• Local Development

  • Docker Compose for local stack
  • Development environment automation
  • Hot reload configurations
  • Local SSL certificate setup

• Testing Integration

  • Unit test integration
  • E2E test automation
  • Performance testing
  • Security testing automation

• Documentation

  • API documentation generation
  • Architecture diagrams
  • Troubleshooting guides
  • Video tutorials

🤝 Contributing

We welcome contributions! This project aims to provide the best CI/CD strategies for Next.js applications.

Please read our Contributing Guide for detailed information on how to contribute.

Quick Start

1. Fork the repository
2. Read CONTRIBUTING.md
3. Create a feature branch (git checkout -b feature/amazing-feature)
4. Make your changes following our coding standards
5. Test thoroughly using our testing guidelines
6. Commit your changes following our commit message format
7. Push and create a Pull Request

Code of Conduct

This project follows a Code of Conduct that all contributors are expected to follow. Please read it before contributing.

Areas Needing Contributions

We especially welcome contributions in:

• 🐳 Docker & Kubernetes implementations
• 📊 Monitoring & Observability setups
• 🔒 Security enhancements and best practices
• ⚡ Performance optimizations
• 📝 Documentation improvements
• 🧪 Testing and test automation
• 🌍 Multi-region deployment strategies
• 📈 Autoscaling configurations
• 🔄 Advanced deployment strategies (blue-green, canary)

📄 License

This project is open source and available under the MIT License.

🙏 Acknowledgments

• PM2 team for the excellent process manager
• Next.js team for the standalone output feature
• Let's Encrypt for free SSL certificates
• All contributors who help improve these deployment strategies

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Need Help? Check the individual strategy READMEs or open an issue for support.

Found a Bug? Please report it so we can fix it for everyone!

Have an Idea? We'd love to hear it! Open an issue or start a discussion.