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Blue-Green Deployments

Blue-Green Deployments

2
posts
2023–2024

Vercel's platform supports advanced deployment strategies like blue-green deployments by leveraging immutable deployments, serverless architecture, Skew Protection, Edge Config, and Middleware. This allows for safe, cost-efficient rollouts with minimal infrastructure overhead and granular control over traffic allocation and user experience. The platform also enables innovative strategies like multicolor and shadow rollouts. Skew Protection ensures that clients that loaded the form with the old field name talk to servers with the exact same version which respectively know how to handle that field name.

2024

Releasing safe and cost-efficient blue-green deployments

4/12/2024

This post introduces Vercel's approach to blue-green deployments, highlighting how its platform primitives (Skew Protection, Edge Config, Middleware) address traditional challenges of architectural gaps and infrastructure overhead. It explains the benefits of blue-green deployments (risk reduction, limited exposure, rapid reversion, cache optimization) and details how Vercel's serverless architecture and immutable deployments enable cost-effective, scalable multi-version serving. It also touches upon advanced strategies like multicolor and shadow rollouts.

2023

Introducing Skew Protection

6/21/2023

Introduces Skew Protection, a novel mechanism to eliminate version skew between web clients and servers. This feature ensures that clients that loaded an application with a specific version are routed to servers running that exact same version, preventing errors caused by API changes or client-server version mismatches during deployments. It leverages Vercel's immutable deployments and edge infrastructure to route requests based on a deployment ID encoded in the response HTML. Configuration is available via `next.config.js` for Next.js, with support for other frameworks planned.