Versioning and Rollback Strategies
Learn how to version federated remotes safely and roll back a single micro frontend instantly when a deployment goes wrong.
Versioning and Rollback Strategies is a free Micro Frontends Architecture with Module Federation lesson on CoddyKit — lesson 4 of 4. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the Micro Frontends Architecture with Module Federation learning path, one of 4 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Why Versioning Is Hard in MFEs
Each micro frontend deploys independently, yet they run together in the browser. Without disciplined versioning, one bad deploy can break a host that was working moments ago.
Immutable Build Artifacts
The foundation of safe deployment is immutable artifacts: every build produces uniquely named files that are never overwritten.
/cart/2.4.1/remoteEntry.js
/cart/2.4.2/remoteEntry.jsContent Hashing
Adding a content hash to filenames guarantees a changed bundle gets a new URL, so caches and hosts never serve a stale or mismatched file by accident.
/cart/remoteEntry.7f3a9c.jsA Version Manifest
A small manifest maps each remote name to the URL currently in production. The host reads it to discover which remote version to load.
{
"cart": "/cart/2.4.2/remoteEntry.js",
"search": "/search/1.9.0/remoteEntry.js"
}Deploying = Updating the Manifest
Because artifacts are immutable, a deployment is just pointing the manifest to a new version. This makes promotion and rollback a single, fast change.
Instant Rollback
To roll back, point the manifest entry back to the previous version. Since the old artifact still exists, the rollback is immediate and risk-free.
// rollback cart
"cart": "/cart/2.4.1/remoteEntry.js"Canary Releases per Remote
Serve a new remote version to a small percentage of users via the manifest, watch metrics, then ramp to 100% — or roll back instantly if errors spike.
Semantic Versioning of Remotes
Use semver for remotes and especially for shared contracts. A major bump signals a breaking interface change that consumers must coordinate around.
Coordinating Shared Dependencies
Rolling back one remote while others advanced can create shared-dependency mismatches. Keep shared library versions within compatible ranges so any single rollback stays safe.
Automating Rollback in CI/CD
Wire health checks into the pipeline so a failed post-deploy check automatically reverts the manifest, turning rollback into a hands-off safety net.
if ! healthcheck cart; then
promote cart 2.4.1 # auto rollback
fiAuditing Versions
Log every manifest change with who, what, and when. This audit trail is invaluable when diagnosing which deploy introduced a regression.
Quick Check
Test your versioning and rollback knowledge.
Recap
You learned versioning and rollback:
- Use immutable, content-hashed artifacts
- A manifest maps remotes to current versions
- Deploy and rollback by changing the manifest
- Canary per remote and use semver for contracts
- Automate rollback on failed health checks
Disciplined versioning makes independent deploys safe.
Frequently asked questions
Is the “Versioning and Rollback Strategies” lesson free?
Yes — the full text of “Versioning and Rollback Strategies” is free to read here on the web, and the Micro Frontends Architecture with Module Federation course includes 4 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the Micro Frontends Architecture with Module Federation course, upgrade to CoddyKit PRO.
What will I learn in “Versioning and Rollback Strategies”?
Learn how to version federated remotes safely and roll back a single micro frontend instantly when a deployment goes wrong. You practise Micro Frontends Architecture with Module Federation with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start Micro Frontends Architecture with Module Federation?
No prior experience is required. Micro Frontends Architecture with Module Federation on CoddyKit is structured for beginners through advanced learners; this is — lesson 4 of 4, so you can start here or from the beginning and move at your own pace.
How long does the “Versioning and Rollback Strategies” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this Micro Frontends Architecture with Module Federation lesson?
Yes. Every Micro Frontends Architecture with Module Federation lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- Independent Deployment Pipelines
- Automated Builds & Releases
- Hosting & Scaling Federated Apps
- Versioning and Rollback Strategies