cloud-migration-planning

SKILL.md

Cloud Migration Planning

Table of Contents

Overview

When to Use

Quick Start

Reference Guides

Best Practices

Overview

Cloud migration planning involves assessing current infrastructure, designing migration strategies, executing migrations with minimal downtime, and validating outcomes. Support lift-and-shift, replatforming, and refactoring approaches for smooth cloud adoption.

When to Use

Moving from on-premises to cloud

Cloud platform consolidation

Legacy system modernization

Reducing data center costs

Improving scalability and availability

Meeting compliance requirements

Disaster recovery enhancement

Technology refresh initiatives

Quick Start

Minimal working example:

# Cloud migration assessment tool
from enum import Enum
from typing import Dict, List, Tuple
from dataclasses import dataclass

class MigrationStrategy(Enum):
    LIFT_AND_SHIFT = "lift_and_shift"  # Rehost
    REPLATFORM = "replatform"          # Rehost with optimizations
    REFACTOR = "refactor"              # Rebuild for cloud
    REPURCHASE = "repurchase"          # Switch to SaaS
    RETIRE = "retire"                  # Decommission

class ApplicationComplexity(Enum):
    LOW = 1
    MEDIUM = 2
    HIGH = 3

@dataclass
class ApplicationAssessment:
    name: str
    complexity: ApplicationComplexity
    dependencies: List[str]
    estimated_effort: int  # days
    business_criticality: int  # 1-10
    current_costs: float  # annual
// ... (see reference guides for full implementation)

Reference Guides

Detailed implementations in the references/ directory:

Guide
Contents

Migration Assessment and Planning
Migration Assessment and Planning

Database Migration Strategies
Database Migration Strategies

Terraform Migration Infrastructure
Terraform Migration Infrastructure

Cutover Validation Checklist
Cutover Validation Checklist

Best Practices

✅ DO

Perform thorough discovery and assessment

Run parallel systems during transition

Test thoroughly before cutover

Have rollback plan ready

Monitor closely post-migration

Document all changes

Train operations team

Maintain previous systems temporarily

❌ DON'T

Rush migration without planning

Migrate without testing

Forget rollback procedures

Ignore dependencies

Skip stakeholder communication

Migrate everything at once

Forget to update documentation

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