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# Cloud Migration to AWS

## Context

Supporting Patronus company in its migration to AWS: technical architecture document, technology watch, planning and cost estimation.

## Objectives

- Conduct technology watch on Cloud services
- Produce a Technical Architecture Document (TAD)
- Compare on-premise, IaaS and PaaS models
- Establish a migration schedule (Gantt)
- Estimate human and financial costs

## Evaluated AWS Services

| Service | On-prem Equivalent | Usage |
|---------|-------------------|-------|
| **EC2** | Physical servers | Compute |
| **RDS** | MySQL/PostgreSQL | Managed database |
| **S3** | NAS/SAN | Object storage |
| **CloudFront** | CDN | Content distribution |
| **VPC** | Local network | Network isolation |
| **IAM** | Active Directory | Access management |

## Model Comparison

| Criteria | On-premise | IaaS (EC2) | PaaS (Elastic Beanstalk) |
|----------|------------|------------|--------------------------|
| Control | Total | High | Limited |
| Maintenance | Internal | Shared | AWS |
| Scalability | Limited | Good | Excellent |
| Initial cost | High | Low | Low |
| Recurring cost | Low | Variable | Variable |

## Deliverables

<details>
<summary>View deliverables</summary>

- [Technology Watch](/assets/projets-oc/p13/bene_mael__1_resultat-veille_112025.pdf)
- [Migration Plan](/assets/projets-oc/p13/bene_mael_2_migration_Patronus_112025.pdf)
- [Presentation](/assets/projets-oc/p13/bene_mael_3_diaporama_112025.pdf)

</details>

## Skills Acquired

- Structured technology watch
- Understanding of Cloud models (IaaS/PaaS/SaaS)
- Technical architecture document writing
- Project cost and effort estimation
- Migration planning (Gantt)
- Stakeholder communication (kickoff)
