Strangler Fig Migrations: From Observability to Shutdown
Free Download
Get the ebook instantly. Review the outline, enter your work email, and open the download in one step.
Incrementally migrating to new infrastructure by building observability before cutting traffic. A complete walkthrough using auth extraction as the running example.
- File type
- PDF Download
- Pages
- 46 pages
- File size
- 2.0 MB
The strangler fig pattern trades big-bang risk for incremental progress by building the new system around the old one, shifting traffic slowly, and only decommissioning legacy when proven. The core insight: you can’t migrate what you can’t observe. Before touching any traffic, establish baselines for normal operation — metrics, response patterns, error rates. With strangler fig, each increment is a small bet. A failure at 5% traffic is containable; at 100% it becomes an outage. Big-bang migrations have single points of failure; strangler fig delivers value incrementally while you learn.
Auth extraction is the hardest extraction — if you can migrate auth, you can migrate anything.
This complete guide teaches you:
- Migration unit selection: service boundaries and endpoint-level increments
- Instrumentation: collecting baseline metrics before cutting any traffic
- Traffic splitting: routing strategies and percentage-based rollout
- Comparison testing: validating new system responses match legacy
- Incident response during migration: rollback triggers and circuit breakers
- Legacy decommissioning: cleanup, data archival, and final cutover
- Real-world walkthroughs: auth, payments, and reporting services
Download Your Strangler Fig Migration Guide now to migrate without big-bang risk.
Instant Access
Get The Ebook
Fill out the form below to receive your pdf instantly.