# Complete Migration Guide

**Date**: 2025-01-27
**Purpose**: Comprehensive guide for all migration types
**Status**: Complete

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## Overview

This guide provides comprehensive instructions for migrating projects to shared infrastructure, services, and monorepos.

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## Migration Types

### 1. Monitoring Migration

**Purpose**: Migrate projects to shared monitoring stack

**Steps**:
1. Ensure service exposes metrics endpoint
2. Add metrics port to service
3. Create ServiceMonitor resource
4. Apply ServiceMonitor

**Script**: `scripts/migrate-to-monitoring.sh`

**Guide**: See `docs/K8S_MIGRATION_GUIDE.md`

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### 2. Kubernetes Migration

**Purpose**: Migrate projects to shared Kubernetes cluster

**Steps**:
1. Create namespace
2. Create deployment
3. Create service
4. Create ingress
5. Configure monitoring
6. Test deployment

**Script**: `scripts/migrate-to-k8s.sh`

**Guide**: See `docs/K8S_MIGRATION_GUIDE.md`

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### 3. API Gateway Migration

**Purpose**: Migrate projects to unified API gateway

**Steps**:
1. Register service with gateway
2. Configure routes
3. Set up authentication
4. Configure rate limiting
5. Update client applications
6. Test endpoints

**Script**: `scripts/migrate-to-api-gateway.sh`

**Guide**: See `docs/API_GATEWAY_MIGRATION_GUIDE.md`

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### 4. Shared Packages Migration

**Purpose**: Migrate projects to use shared packages

**Steps**:
1. Install shared packages
2. Update imports
3. Remove duplicate code
4. Update configuration
5. Test functionality

**Script**: `scripts/migrate-to-shared-packages.sh`

**Guide**: See `docs/SHARED_PACKAGES_MIGRATION_GUIDE.md`

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### 5. Terraform Migration

**Purpose**: Migrate projects to use shared Terraform modules

**Steps**:
1. Review current infrastructure
2. Identify modules to use
3. Update Terraform configuration
4. Update resource references
5. Test migration
6. Apply changes

**Script**: `scripts/migrate-terraform.sh`

**Guide**: See `docs/TERRAFORM_MIGRATION_GUIDE.md`

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### 6. DBIS Monorepo Migration

**Purpose**: Migrate DBIS projects to monorepo

**Steps**:
1. Set up monorepo structure
2. Migrate projects
3. Set up shared packages
4. Configure CI/CD
5. Test migration

**Script**: `scripts/migrate-dbis-project.sh`

**Guide**: See `docs/DBIS_MONOREPO_MIGRATION_PLAN.md`

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## Migration Checklist

### Pre-Migration
- [ ] Review migration guide
- [ ] Assess project complexity
- [ ] Create backup
- [ ] Set up test environment
- [ ] Prepare rollback plan

### During Migration
- [ ] Follow step-by-step guide
- [ ] Test each step
- [ ] Document changes
- [ ] Verify functionality

### Post-Migration
- [ ] Verify all services
- [ ] Test integrations
- [ ] Update documentation
- [ ] Monitor metrics
- [ ] Train team

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## Best Practices

### Planning
- Start with low-risk projects
- Test in dev/staging first
- Have rollback plan ready
- Communicate with team

### Execution
- Follow guides step-by-step
- Test thoroughly
- Document changes
- Monitor closely

### Post-Migration
- Verify everything works
- Update documentation
- Share learnings
- Optimize as needed

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## Troubleshooting

### Common Issues
- Configuration errors
- Network connectivity
- Resource conflicts
- Permission issues

### Solutions
- Check logs
- Verify configurations
- Review documentation
- Ask for help

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## Support

### Resources
- Migration guides in `docs/`
- Helper scripts in `scripts/`
- Example configurations
- Troubleshooting sections

### Getting Help
- Review documentation
- Check examples
- Review similar migrations
- Ask team members

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**Last Updated**: 2025-01-27