diff --git a/SERVER_MIGRATION_README.md b/SERVER_MIGRATION_README.md new file mode 100644 index 0000000..f5d41ee --- /dev/null +++ b/SERVER_MIGRATION_README.md @@ -0,0 +1,394 @@ +# Server Migration Solution + +**Branch:** `feature/server-migration` +**Status:** 🚧 In Development +**Focus:** Windows & Linux server migration (not users/workstations) + +--- + +## 🎯 What's Different? + +This branch is a **specialized fork** of the Auto Domain Migration solution, focused on **server infrastructure migration** rather than user/workstation migration. + +### Main Branch (master) +- βœ… Active Directory user migration +- βœ… Workstation domain joins +- βœ… User profile migration (USMT) +- βœ… File share migration (user data) +- βœ… Group Policy migration + +### This Branch (feature/server-migration) +- πŸ†• Server discovery & assessment +- πŸ†• Application server migration +- πŸ†• Database migration (SQL, PostgreSQL, MySQL, MongoDB) +- πŸ†• Web server migration (IIS, Apache, Nginx) +- πŸ†• Container migration (VM β†’ Kubernetes) +- πŸ†• Minimal downtime strategies + +--- + +## πŸ“š Documentation + +**Start Here:** [`docs/33_SERVER_MIGRATION_STRATEGY.md`](docs/33_SERVER_MIGRATION_STRATEGY.md) + +This document covers: +- Use cases (data center, cloud, server refresh) +- Migration methods (Azure Migrate, ASR, DMS) +- 6-phase workflow +- Server types (Windows & Linux) +- Cost estimates +- Implementation plan (5 weeks) + +--- + +## πŸ—οΈ Architecture + +### Supported Migrations + +**Windows Servers:** +- IIS web servers +- SQL Server databases +- Custom application servers +- Print servers +- Terminal/RDS servers + +**Linux Servers:** +- Apache/Nginx web servers +- PostgreSQL/MySQL/MongoDB databases +- Node.js/Python/Java application servers +- Docker/Podman container hosts +- NFS/Samba file servers + +**Migration Paths:** +- On-premises β†’ Azure +- VMware β†’ Azure +- Physical β†’ Virtual +- VM β†’ Containers +- Windows ↔ Linux + +--- + +## πŸ› οΈ Technology Stack + +### Migration Tools +- **Azure Migrate** - Primary orchestration +- **Azure Site Recovery** - Server replication +- **Database Migration Service** - Database-specific +- **Rsync/Robocopy** - File synchronization + +### Automation (Reused from main) +- **Terraform** - Infrastructure provisioning +- **Ansible** - Configuration management +- **PowerShell** - Windows automation +- **Bash** - Linux automation + +### Monitoring (Reused from main) +- **Prometheus** - Metrics +- **Grafana** - Dashboards +- **Azure Monitor** - Cloud monitoring + +--- + +## πŸš€ Quick Start + +### 1. Switch to This Branch + +```bash +git checkout feature/server-migration +``` + +### 2. Review Strategy Document + +```bash +# Read the comprehensive strategy +cat docs/33_SERVER_MIGRATION_STRATEGY.md +``` + +### 3. Install Prerequisites + +```bash +# Same as main branch +- Ansible 2.15+ +- Terraform 1.6+ +- Azure CLI +- PowerShell 7+ +``` + +### 4. Start with Discovery + +```bash +# Coming soon: Server discovery playbook +ansible-playbook playbooks/server_discovery.yml +``` + +--- + +## πŸ“‹ Implementation Status + +### βœ… Completed +- [x] Branch created +- [x] Strategy document +- [x] Architecture design + +### 🚧 In Progress +- [ ] Remove user/workstation code +- [ ] Create server discovery playbooks +- [ ] Azure Migrate integration +- [ ] Database migration automation +- [ ] Web server migration playbooks + +### πŸ“… Planned (5-week timeline) + +**Week 1: Discovery** +- [ ] Server inventory automation +- [ ] Dependency mapping +- [ ] Assessment reports + +**Week 2: Azure Migrate** +- [ ] Appliance deployment +- [ ] VMware/Hyper-V integration +- [ ] Assessment automation + +**Week 3-4: Migration** +- [ ] ASR replication +- [ ] Database migration (DMS) +- [ ] Application migration +- [ ] Testing automation + +**Week 5: Cutover** +- [ ] Pre-cutover checks +- [ ] Automated failover +- [ ] DNS updates +- [ ] Verification + +--- + +## πŸ’‘ Key Concepts + +### Discovery Phase +Inventory all servers with: +- OS type and version +- CPU, memory, disk +- Installed applications +- Running services +- Network dependencies +- Database connections + +### Replication Phase +Continuous sync from source to target: +- Block-level replication (ASR) +- Application-consistent snapshots +- Monitor replication lag +- Alert on issues + +### Testing Phase +Validate before production cutover: +- Test failover to Azure +- Verify applications work +- Performance testing +- Rollback plan verified + +### Cutover Phase +Minimize downtime with orchestration: +- Stop source services +- Final sync +- Failover to Azure +- Update DNS +- Verify all services + +--- + +## 🎯 Use Cases + +### 1. Data Center Decommission +**Scenario:** Moving 50 servers from aging data center to Azure +**Timeline:** 8-12 weeks +**Downtime:** < 2 hours per server + +### 2. VMware to Azure +**Scenario:** Lift-and-shift VMware VMs to Azure +**Timeline:** 4-8 weeks +**Downtime:** < 30 minutes per VM + +### 3. Server OS Upgrade +**Scenario:** Windows Server 2012 β†’ 2022 +**Timeline:** Side-by-side migration +**Downtime:** During cutover only + +### 4. Database Migration +**Scenario:** SQL Server 2014 β†’ Azure SQL Managed Instance +**Timeline:** 2-4 weeks +**Downtime:** < 1 hour (DMS continuous sync) + +--- + +## πŸ’° Cost Estimates + +| Scale | Servers | Monthly Cost | Notes | +|-------|---------|--------------|-------| +| **Small** | 5-10 | $200-400 | Dev/Test | +| **Medium** | 20-50 | $1,000-2,000 | Production | +| **Large** | 50-100 | $3,000-5,000 | Enterprise | +| **XL** | 100+ | $5,000-10,000 | Multi-site | + +**Migration Costs (temporary):** +- Azure Migrate: Free (180 days) +- ASR: ~$25/server/month +- Data transfer: ~$0.087/GB egress +- Azure Data Box: $300-500 (large datasets) + +--- + +## 🀝 Relationship to Main Branch + +### Shared Components +We reuse these from the main branch: +- βœ… Terraform infrastructure patterns +- βœ… Ansible framework +- βœ… CI/CD pipelines +- βœ… Testing framework +- βœ… Documentation structure +- βœ… Monitoring stack + +### Unique to This Branch +New components for server migration: +- πŸ†• Azure Migrate integration +- πŸ†• Database migration automation +- πŸ†• Web server migration +- πŸ†• Application discovery +- πŸ†• Dependency mapping +- πŸ†• Cutover orchestration + +### Merge Strategy +- **Keep separate:** Different use cases +- **Share modules:** Via Git submodules +- **Cross-reference:** Documentation links +- **Independent evolution:** Both maintained + +--- + +## πŸ“– Documentation + +| Document | Description | +|----------|-------------| +| [33_SERVER_MIGRATION_STRATEGY.md](docs/33_SERVER_MIGRATION_STRATEGY.md) | **START HERE** - Complete strategy | +| Coming: 34_SERVER_MIGRATION_GUIDE.md | Step-by-step implementation | +| Coming: 35_DATABASE_MIGRATION.md | Database-specific guide | +| Coming: 36_WEB_SERVER_MIGRATION.md | Web server patterns | +| Coming: 37_CONTAINER_MIGRATION.md | VM β†’ Container strategy | + +--- + +## πŸ”„ Switching Between Branches + +### Work on User Migration (main) +```bash +git checkout master +# Work on ADMT, user profiles, workstations +``` + +### Work on Server Migration (this branch) +```bash +git checkout feature/server-migration +# Work on Azure Migrate, databases, web servers +``` + +### Keep Both Updated +```bash +# On feature/server-migration +git merge master --no-commit +# Review conflicts, keep shared components updated +``` + +--- + +## πŸ›£οΈ Roadmap + +### Phase 1: Foundation (Current) +- [x] Create branch +- [x] Strategy document +- [ ] Remove user-specific code +- [ ] Adapt infrastructure code + +### Phase 2: Discovery (Week 1-2) +- [ ] Server inventory automation +- [ ] Dependency mapping +- [ ] Azure Migrate integration + +### Phase 3: Migration (Week 3-5) +- [ ] ASR automation +- [ ] Database migration +- [ ] Web server migration +- [ ] Application patterns + +### Phase 4: Polish (Week 6-8) +- [ ] Complete documentation +- [ ] Training materials +- [ ] Test coverage +- [ ] CI/CD integration + +### Phase 5: Production (Week 9+) +- [ ] Real-world testing +- [ ] Customer deployments +- [ ] Feedback integration +- [ ] Continuous improvement + +--- + +## πŸ€” FAQ + +### Q: Can I use both solutions? +**A:** Yes! Main branch for users/workstations, this branch for servers. + +### Q: Will this branch merge back to main? +**A:** No, they're maintained separately. Different use cases. + +### Q: What about hybrid scenarios? +**A:** Use both! Migrate users (main) and servers (this) in parallel. + +### Q: Can I contribute to both? +**A:** Absolutely! Improvements to shared components benefit both. + +### Q: Which branch should I use? +**A:** +- **main:** Migrating users, workstations, AD objects +- **feature/server-migration:** Migrating servers, databases, applications + +--- + +## πŸ“ž Support + +### Questions? +- Open an issue on GitHub +- Tag with `server-migration` label +- Reference this branch + +### Contributing? +- Fork this branch +- Submit PR to `feature/server-migration` +- Follow contribution guidelines + +--- + +## πŸŽ‰ Vision + +**Build the most comprehensive server migration solution for Azure:** +- βœ… Automated discovery +- βœ… Intelligent assessment +- βœ… Minimal downtime +- βœ… Zero data loss +- βœ… Complete automation +- βœ… Enterprise-grade + +**From idea to production in 5 weeks!** πŸš€ + +--- + +**Current Status:** Branch created, strategy complete, ready to build! + +**Next Step:** Remove user-specific code and start building server discovery. + +**Version:** 1.0 +**Last Updated:** January 2025 +**Branch:** feature/server-migration + diff --git a/docs/33_SERVER_MIGRATION_STRATEGY.md b/docs/33_SERVER_MIGRATION_STRATEGY.md new file mode 100644 index 0000000..9a6e417 --- /dev/null +++ b/docs/33_SERVER_MIGRATION_STRATEGY.md @@ -0,0 +1,579 @@ +# Server Migration Strategy + +**Version:** 1.0 +**Last Updated:** January 2025 +**Branch:** feature/server-migration +**Status:** 🚧 Design Phase + +--- + +## πŸ“‹ Overview + +This is a specialized fork of the Auto Domain Migration solution, focused exclusively on **server migration** (both Windows and Linux) rather than user/workstation migration. + +### Key Differences from Domain Migration + +| Domain Migration (main) | Server Migration (this branch) | +|-------------------------|--------------------------------| +| Focus on users & workstations | Focus on servers & services | +| ADMT for AD objects | Server-to-server replication | +| User profile migration | Application & data migration | +| Desktop applications | Server roles & services | +| Group Policy | Server configuration | +| File shares (user data) | Databases, web servers, etc. | + +--- + +## 🎯 Use Cases + +### 1. Data Center Migration +- Physical to virtual (P2V) +- VMware to Azure +- On-premises to cloud +- Data center consolidation + +### 2. Cloud Migration +- Lift-and-shift to Azure +- AWS β†’ Azure migration +- GCP β†’ Azure migration +- Multi-cloud consolidation + +### 3. Server Refresh +- Windows Server 2012 β†’ 2022 +- CentOS β†’ Rocky Linux +- Ubuntu 18.04 β†’ 22.04 +- OS upgrade migrations + +### 4. Platform Migration +- Windows β†’ Linux +- Linux β†’ Windows +- Physical β†’ Containers +- VM β†’ Kubernetes + +--- + +## πŸ—οΈ Architecture + +### Server Types to Migrate + +#### Windows Servers +- **Domain Controllers** (already covered in main) +- **File Servers** (already covered via SMS) +- **Web Servers** (IIS) +- **Database Servers** (SQL Server, PostgreSQL) +- **Application Servers** (custom apps) +- **Email Servers** (Exchange - future) +- **Print Servers** +- **Terminal Servers / RDS** + +#### Linux Servers +- **Web Servers** (Apache, Nginx) +- **Database Servers** (PostgreSQL, MySQL, MongoDB) +- **Application Servers** (Node.js, Python, Java) +- **Container Hosts** (Docker, Podman) +- **File Servers** (NFS, Samba) +- **DNS/DHCP Servers** +- **Monitoring Servers** (Prometheus, Grafana) + +--- + +## πŸ”§ Migration Methods + +### Method 1: Azure Migrate (Recommended) +**Best for:** VMware/Hyper-V to Azure + +**Features:** +- Agentless discovery +- Dependency mapping +- Performance-based sizing +- Cost estimation +- Automated replication +- Test migrations +- Minimal downtime cutover + +**Tools:** +- Azure Migrate appliance +- Azure Site Recovery +- Database Migration Service + +--- + +### Method 2: Azure Site Recovery (ASR) +**Best for:** Disaster recovery + migration + +**Features:** +- Continuous replication +- Application-consistent snapshots +- Orchestrated failover +- Supports physical & virtual +- Cross-platform (Windows/Linux) + +**Limitations:** +- Requires agent on source +- Network requirements +- Licensing considerations + +--- + +### Method 3: Database Migration Service +**Best for:** Database-only migrations + +**Supports:** +- SQL Server β†’ Azure SQL +- PostgreSQL β†’ Azure PostgreSQL +- MySQL β†’ Azure MySQL +- MongoDB β†’ Cosmos DB +- Oracle β†’ Azure SQL (future) + +**Features:** +- Minimal downtime +- Schema conversion +- Data validation +- Continuous sync + +--- + +### Method 4: Lift-and-Shift (Manual) +**Best for:** Simple servers, special cases + +**Steps:** +1. Build target server +2. Install applications +3. Migrate data (rsync/robocopy) +4. Migrate configuration +5. Update DNS +6. Cutover + +--- + +## πŸ“Š Migration Workflow + +``` +β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” +β”‚ Phase 1: Discovery & Assessment β”‚ +β”‚ β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”‚ +β”‚ β”‚ Inventory β”‚β†’β”‚ Assess β”‚β†’β”‚ Plan β”‚ β”‚ +β”‚ β”‚ Servers β”‚ β”‚ Readinessβ”‚ β”‚ Waves β”‚ β”‚ +β”‚ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β”‚ +β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ + ↓ +β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” +β”‚ Phase 2: Preparation β”‚ +β”‚ β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”‚ +β”‚ β”‚ Build β”‚β†’β”‚ Configureβ”‚β†’β”‚ Test β”‚ β”‚ +β”‚ β”‚ Target β”‚ β”‚ Network β”‚ β”‚ Connectivity β”‚ β”‚ +β”‚ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β”‚ +β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ + ↓ +β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” +β”‚ Phase 3: Replication β”‚ +β”‚ β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”‚ +β”‚ β”‚ Initial β”‚β†’β”‚ Delta β”‚β†’β”‚ Monitor β”‚ β”‚ +β”‚ β”‚ Sync β”‚ β”‚ Sync β”‚ β”‚ Lag β”‚ β”‚ +β”‚ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β”‚ +β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ + ↓ +β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” +β”‚ Phase 4: Testing β”‚ +β”‚ β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”‚ +β”‚ β”‚ Test β”‚β†’β”‚ Validate β”‚β†’β”‚ Performanceβ”‚ β”‚ +β”‚ β”‚ Failover β”‚ β”‚ Data β”‚ β”‚ Test β”‚ β”‚ +β”‚ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β”‚ +β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ + ↓ +β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” +β”‚ Phase 5: Cutover β”‚ +β”‚ β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”‚ +β”‚ β”‚ Final β”‚β†’β”‚ Failover β”‚β†’β”‚ Verify β”‚ β”‚ +β”‚ β”‚ Sync β”‚ β”‚ (DNS) β”‚ β”‚ Services β”‚ β”‚ +β”‚ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β”‚ +β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ + ↓ +β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” +β”‚ Phase 6: Decommission β”‚ +β”‚ β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”Œβ”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β” β”‚ +β”‚ β”‚ Monitor β”‚β†’β”‚ Cleanup β”‚β†’β”‚ Document β”‚ β”‚ +β”‚ β”‚ 30 days β”‚ β”‚ Source β”‚ β”‚ Changes β”‚ β”‚ +β”‚ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ β”‚ +β””β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”€β”˜ +``` + +--- + +## πŸ› οΈ Technology Stack + +### Discovery & Assessment +- **Azure Migrate** - Server discovery & assessment +- **Ansible** - Inventory collection +- **Nmap** - Network scanning +- **Custom scripts** - Deep discovery + +### Migration Tools +- **Azure Migrate** - Orchestration +- **Azure Site Recovery** - Server replication +- **Database Migration Service** - Database migration +- **Azure Data Box** - Large data transfers +- **Rsync** - Linux file sync +- **Robocopy** - Windows file copy + +### Automation +- **Ansible** - Configuration management +- **Terraform** - Infrastructure provisioning +- **PowerShell** - Windows automation +- **Bash** - Linux automation + +### Monitoring +- **Azure Monitor** - Cloud monitoring +- **Prometheus** - Metrics +- **Grafana** - Dashboards +- **Custom scripts** - Replication lag + +--- + +## πŸ“ Proposed Changes from Main Branch + +### Files to Keep (Reuse) +``` +βœ… terraform/ (Infrastructure - adapt) +βœ… ansible/roles/discovery/ (Server discovery) +βœ… docs/training/ (Training materials) +βœ… .github/workflows/ (CI/CD pipelines) +βœ… tests/ (Test framework) +``` + +### Files to Remove/Replace +``` +❌ ansible/files/ADMT-Functions.psm1 (User migration) +❌ ansible/roles/admt_* (ADMT-specific) +❌ ansible/roles/usmt_* (User state migration) +❌ scripts/ad-test-data/ (AD user data) +❌ scripts/Generate-TestFileData.ps1 (User files) +``` + +### New Files to Create +``` +πŸ†• ansible/roles/server_discovery/ +πŸ†• ansible/roles/azure_migrate/ +πŸ†• ansible/roles/application_migration/ +πŸ†• ansible/roles/database_migration/ +πŸ†• ansible/playbooks/server_migration/ +πŸ†• scripts/azure-migrate/ +πŸ†• scripts/server-assessment/ +πŸ†• docs/34_SERVER_MIGRATION_GUIDE.md +``` + +--- + +## 🎯 Initial Implementation Plan + +### Phase 1: Discovery (Week 1) +**Goal:** Inventory all servers and dependencies + +**Tasks:** +1. Create server discovery playbook + - OS type and version + - CPU, memory, disk + - Network interfaces + - Installed applications + - Running services + - Open ports + - Dependencies + +2. Build dependency mapping + - Application dependencies + - Database connections + - API calls + - File share dependencies + - Authentication dependencies + +3. Assessment reporting + - Migration readiness score + - Sizing recommendations + - Cost estimation + - Risk assessment + +--- + +### Phase 2: Azure Migrate Integration (Week 2) +**Goal:** Integrate with Azure Migrate service + +**Tasks:** +1. Deploy Azure Migrate appliance + - Terraform for appliance VM + - Configuration automation + - Credential management + +2. Automated discovery + - VMware integration + - Hyper-V integration + - Physical server discovery + - Import to Azure Migrate + +3. Assessment automation + - Export assessment results + - Parse recommendations + - Generate migration plan + +--- + +### Phase 3: Migration Automation (Week 3-4) +**Goal:** Automate server replication and cutover + +**Tasks:** +1. Replication orchestration + - Enable replication via ASR + - Monitor replication status + - Alert on issues + +2. Database migration + - DMS setup + - Schema validation + - Data sync monitoring + +3. Application migration + - IIS configuration export/import + - Apache/Nginx config migration + - Application dependencies + +4. Testing automation + - Test failover execution + - Validation scripts + - Performance testing + +--- + +### Phase 4: Cutover Automation (Week 5) +**Goal:** Minimize downtime with automated cutover + +**Tasks:** +1. Pre-cutover checks + - Replication lag < threshold + - All dependencies ready + - Rollback plan verified + +2. Cutover orchestration + - Stop source services + - Final sync + - Failover to Azure + - Update DNS + - Start target services + - Verify functionality + +3. Post-cutover + - Monitoring setup + - Documentation + - Source cleanup (after 30 days) + +--- + +## πŸ’° Cost Comparison + +| Tier | Servers | Monthly Cost | Components | +|------|---------|--------------|------------| +| **Demo** | 5-10 | $200-400 | Basic VMs, no HA | +| **Production** | 20-50 | $1,000-2,000 | HA VMs, managed services | +| **Enterprise** | 100+ | $5,000-10,000 | Full redundancy, premium | + +**Migration Costs:** +- Azure Migrate: Free (first 180 days) +- Azure Site Recovery: ~$25/server/month during migration +- Data transfer: ~$0.087/GB (egress from on-prem) +- Azure Data Box: $300-500 (for large data sets) + +--- + +## πŸŽ“ Server Types - Detailed Strategies + +### Web Servers + +**Windows (IIS):** +```powershell +# Export IIS configuration +WebAdministration\Export-IISConfiguration -Path C:\Temp\IIS-Export + +# On target: Import configuration +Import-IISConfiguration -Path C:\Temp\IIS-Export +``` + +**Linux (Apache/Nginx):** +```bash +# Backup configuration +tar -czf /tmp/webserver-config.tar.gz /etc/nginx /etc/apache2 /var/www + +# On target: Restore +tar -xzf /tmp/webserver-config.tar.gz -C / +``` + +--- + +### Database Servers + +**SQL Server:** +- Use Azure Database Migration Service +- Minimal downtime (continuous sync) +- Validation built-in + +**PostgreSQL/MySQL:** +- pg_dump / mysqldump for schema +- Logical replication for data +- Azure Database Migration Service + +**MongoDB:** +- mongodump / mongorestore +- Azure Cosmos DB migration tool +- Continuous sync option + +--- + +### Application Servers + +**Strategy:** +1. Inventory dependencies +2. Install dependencies on target +3. Deploy application +4. Migrate configuration +5. Migrate data +6. Test thoroughly +7. Cutover + +**Tools:** +- Ansible for configuration +- Git for application code +- Rsync/Robocopy for data +- Custom scripts for validation + +--- + +## πŸ“Š Success Metrics + +### Migration Metrics +- **Servers migrated:** Target count +- **Success rate:** > 95% +- **Downtime per server:** < 2 hours (goal: < 30 min) +- **Data loss:** Zero +- **Rollbacks required:** < 5% + +### Performance Metrics +- **Application response time:** Within 10% of baseline +- **Database performance:** Within 10% of baseline +- **Network latency:** Acceptable for users + +### Business Metrics +- **Cost savings:** Compare old vs new infrastructure +- **Time to migrate:** Days/weeks (vs months manually) +- **User impact:** Minimize complaints + +--- + +## πŸš€ Next Steps + +### Immediate (This Branch) +1. βœ… Create strategy document (this file) +2. πŸ”² Remove user/workstation-specific code +3. πŸ”² Create server discovery playbook +4. πŸ”² Build Azure Migrate integration +5. πŸ”² Create server migration playbooks +6. πŸ”² Update documentation + +### Short Term (1-2 weeks) +1. πŸ”² Implement discovery automation +2. πŸ”² Build assessment reports +3. πŸ”² Create dependency mapping +4. πŸ”² Test with sample servers + +### Medium Term (1 month) +1. πŸ”² Full Azure Migrate integration +2. πŸ”² Database migration automation +3. πŸ”² Web server migration automation +4. πŸ”² Application migration patterns + +### Long Term (2-3 months) +1. πŸ”² Container migration (VM β†’ Kubernetes) +2. πŸ”² Multi-cloud support +3. πŸ”² Zero-downtime migrations +4. πŸ”² Automated rollback + +--- + +## 🀝 Relationship to Main Branch + +### Shared Components +- Terraform infrastructure patterns +- Ansible framework +- CI/CD pipelines +- Testing framework +- Documentation structure +- Training materials format + +### Divergent Components +- Migration methodology (server vs user) +- Tools (Azure Migrate vs ADMT) +- Discovery focus (apps/services vs users) +- Testing approach (service validation vs user experience) + +### Merge Strategy +- Keep branches separate (different use cases) +- Share common modules via Git submodules +- Cross-reference documentation +- Maintain both solutions independently + +--- + +## πŸ“š Resources + +### Microsoft Documentation +- [Azure Migrate](https://docs.microsoft.com/azure/migrate/) +- [Azure Site Recovery](https://docs.microsoft.com/azure/site-recovery/) +- [Database Migration Service](https://docs.microsoft.com/azure/dms/) + +### Tools +- [Azure Migrate Appliance](https://aka.ms/migrate/appliance) +- [Movere (Discovery)](https://www.movere.io/) +- [Service Map](https://docs.microsoft.com/azure/azure-monitor/vm/service-map) + +### Community +- [Azure Migration Forum](https://techcommunity.microsoft.com/t5/azure-migration/bd-p/AzureMigration) +- [Reddit r/AZURE](https://reddit.com/r/AZURE) + +--- + +## βœ… Checklist for This Branch + +### Code Cleanup +- [ ] Remove ADMT-Functions.psm1 +- [ ] Remove USMT roles +- [ ] Remove AD test data scripts +- [ ] Keep discovery role (adapt for servers) +- [ ] Keep infrastructure code (adapt) + +### New Code +- [ ] Server discovery playbook +- [ ] Azure Migrate integration +- [ ] ASR automation +- [ ] Database migration scripts +- [ ] Web server migration +- [ ] Application migration patterns + +### Documentation +- [ ] Server migration guide +- [ ] Tool selection matrix +- [ ] Migration runbooks (per server type) +- [ ] Troubleshooting guide +- [ ] Cost estimation guide + +### Testing +- [ ] Server discovery tests +- [ ] Migration validation tests +- [ ] Rollback tests +- [ ] Performance tests + +--- + +**Status:** 🚧 Initial planning complete - Ready to implement! + +**Version:** 1.0 +**Last Updated:** January 2025 +**Branch:** feature/server-migration + +**Let's build a specialized server migration solution!** πŸš€ +