# Open Source in Regulated Environments: Migration Summary and Checklist

Date: 2026-05-07

This series connected a simple strategic idea—**reducing lock‑in and increasing control**—to how modern EU rules ask you to prove security, resilience, data respect, and product discipline. Open source is a *means*, not a certificate. The outcome regulators care about is operational: defensible governance, tested recovery, traceable software, and honest data handling.

**Summary**

- **GDPR**: accountability, ROPA, transfers, DPIAs, and security measures survive any migration; self‑hosting shifts evidence collection inward.
- **DORA**: ICT risk, third parties, incidents, and resilience testing apply to financial entities; stacks change, obligations do not.
- **NIS2**: cyber hygiene, supply chain, and reporting expectations intensify; open pipelines need owners and SLAs.
- **EU AI Act**: roles, risk class, documentation, transparency, and oversight follow the use case; open weights do not auto‑exempt deployments.
- **Cyber Resilience Act**: product security lifecycle matters when digital elements hit the market; SBOMs and patching become board‑visible.
- **EU Data Act**: switching, fairness, and interoperability push you toward portable designs and real exit paths.

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### Migration to‑do checklist

**Strategy and ownership**

- [ ] Name a single accountable owner for the migration (business + engineering + security).
- [ ] Define success: compliance posture, cost, exit time, RTO/RPO—not only “we use Linux.”

**Inventory and architecture**

- [ ] Catalogue critical systems, data classes, AI use cases, and third parties affected by the move.
- [ ] Document target architecture: identity, secrets, logging, backup, and network zones.

**Regulatory artefacts**

- [ ] Update **ROPA** / processing records; revisit legal basis and retention.
- [ ] Refresh **transfer analysis** and contracts for new subprocessors or regions.
- [ ] Trigger or update **DPIA** where high‑risk processing or AI changes the picture.
- [ ] Align **DORA / NIS2** risk registers, incident playbooks, and test schedules with the new stack.
- [ ] Classify **AI systems** under the AI Act lens; assign provider/deployer duties and evidence needs.
- [ ] For **in-scope products**, map CRA expectations to your release and vulnerability management process.
- [ ] For **lock‑in risk**, test **Data Act–relevant** switching: exports, APIs, contract exit clauses.

**Engineering discipline**

- [ ] SBOM or dependency inventory integrated into CI; critical CVE SLAs defined.
- [ ] Reproducible builds, signed artifacts, and environment parity (dev/test/prod).
- [ ] Backup/restore and failover exercised on the new platform; results archived.

**Operational readiness**

- [ ] Training for admins; break‑glass access; patching windows; on‑call coverage.
- [ ] Decommission legacy systems and **delete** redundant copies (GDPR “storage limitation” reality check).

If you treat open source as **portability plus evidence**, migrations stop being one‑off projects and become a **capability**: you can adapt when law, vendors, or threat models move—which they will.

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Need help untangling your regulatory obligations - ISO27001, DORA, GDPR, CRA, or the latest from Brussels? I support teams navigating audits, migrations, and compliance transformations. **[Contact me for practical guidance or hands-on support.](https://goldmanmalka.com/about/)**