Prompt

I'm building a migration off a legacy gateway and need version routing and failover. What should I use?

Technology / API Platforms1 observationLast seen Oct 6, 2026

Latest observation

Oct 6, 2026OpenAI APIWeb search: off

Use HTTP route matching + canary/failover logic at the edge, ideally in Envoy / Kong / NGINX / a service mesh rather than hard-coding it in apps.

A good pattern is:

  • Version routing
    • Route by path (/v1, /v2)
    • or by header (X-API-Version: 2)
    • or by percentage-based traffic splitting for gradual migration
  • Failover
    • Use active health checks
    • configure retry + timeout + circuit breaking
    • fail over to the legacy backend if the new backend is unhealthy
  • Migration strategy
    • Start with shadow traffic to validate the new path
    • then small canary
    • then increase to full cutover
    • keep the legacy gateway as a fallback until confidence is high

If you want a concrete recommendation:

  • Kubernetes / microservices: Istio or Linkerd + Envoy
  • API gateway / edge routing: Kong, Envoy Gateway, or NGINX
  • Cloud-native managed: AWS API Gateway + ALB/CloudFront rules, or equivalent in your cloud

If you tell me:

  1. where this runs (Kubernetes, VM, cloud-managed),
  2. what protocols you need (HTTP, gRPC, WebSocket), and
  3. whether routing is by path/header/percentage,

I can suggest the best specific setup and configuration.

Observation history

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