Estrategias de Migración a la Nube para Empresas: Guía Completa

Matriz de Evaluación de Aplicaciones

{
  "application_portfolio": {
    "crm_system": {
      "name": "Customer Relationship Management",
      "technology": "Java Spring Boot",
      "database": "PostgreSQL",
      "dependencies": ["payment_gateway", "email_service"],
      "criticality": "high",
      "complexity": "medium",
      "cloud_readiness": 7,
      "recommended_strategy": "replatform",
      "estimated_effort": "4 months"
    },
    "legacy_mainframe": {
      "name": "Core Banking System",
      "technology": "COBOL",
      "database": "DB2",
      "dependencies": ["all_applications"],
      "criticality": "critical",
      "complexity": "very_high",
      "cloud_readiness": 2,
      "recommended_strategy": "retain",
      "estimated_effort": "24+ months"
    }
  }
}

# terraform/rds-migration.tf
resource "aws_dms_replication_instance" "main" {
  replication_instance_class = "dms.t3.micro"
  replication_instance_id    = "prod-migration-instance"
  
  auto_minor_version_upgrade   = true
  multi_az                    = true
  publicly_accessible        = false
  
  vpc_security_group_ids = [aws_security_group.dms.id]
  replication_subnet_group_id = aws_dms_replication_subnet_group.main.id
  
  tags = {
    Name = "Production DB Migration"
    Environment = "production"
  }
}

resource "aws_dms_endpoint" "source" {
  endpoint_id   = "source-postgres"
  endpoint_type = "source"
  engine_name   = "postgres"
  
  database_name = "production"
  username      = var.source_db_username
  password      = var.source_db_password
  port          = 5432
  server_name   = var.source_db_endpoint
  
  ssl_mode = "require"
}

resource "aws_dms_endpoint" "target" {
  endpoint_id   = "target-rds"
  endpoint_type = "target"
  engine_name   = "postgres"
  
  database_name = aws_db_instance.target.name
  username      = aws_db_instance.target.username
  password      = var.target_db_password
  port          = aws_db_instance.target.port
  server_name   = aws_db_instance.target.endpoint
}

resource "aws_dms_replication_task" "migration" {
  migration_type           = "full-load-and-cdc"
  replication_instance_arn = aws_dms_replication_instance.main.replication_instance_arn
  replication_task_id      = "postgres-migration-task"
  
  source_endpoint_arn = aws_dms_endpoint.source.endpoint_arn
  target_endpoint_arn = aws_dms_endpoint.target.endpoint_arn
  
  table_mappings = jsonencode({
    rules = [
      {
        rule-type = "selection"
        rule-id   = "1"
        rule-name = "1"
        object-locator = {
          schema-name = "public"
          table-name  = "%"
        }
        rule-action = "include"
      }
    ]
  })
}