Migration

Phase 1 is the safest phase of the migration — by design. No write operation touches the new microservices. Magento remains the source of truth for all data modifications. The only thing Phase 1 does is prove that your microservices can serve reads faster and more reliably than Magento. Answer-first: Phase 1 deploys read-only Go microservices alongside legacy Magento. API Gateway feature flags route read requests to Go with automatic fallback to Magento on failure. Embedded Debezium streams MySQL binary log updates to Redis Streams with sub-2-second sync latency. ...

In Phase 1, both systems existed but only one wrote data: Magento. In Phase 2, both systems write data simultaneously. This is the most technically complex phase — and the one where most migrations introduce data corruption if they don’t have an explicit conflict resolution strategy. Answer-first: Phase 2 implements event-driven dual-write where microservices update PostgreSQL and publish domain events to Dapr PubSub. The sync adapter service updates legacy Magento asynchronously. Concurrent write conflicts are resolved through deterministic conflict resolution policies tailored to specific domain data types. ...

Phase 3 is the final act: 100% of traffic moves to microservices, Magento becomes a passive archive, and the platform runs entirely on Go microservices via GitOps. No PHP in the critical path. No Magento license renewal needed. Answer-first: Phase 3 cutover executes an immediate 100% traffic shift for stable read services and a graduated ramp over 10 days for transactional services. Legacy Magento remains a hot standby for 30 days while automated ArgoCD gitops pipelines handle production deployments. ...