deployment-strategy

Zero-downtime deployment is achieved by using blue-green or canary strategies to gradually shift traffic. This minimizes risk by maintaining a stable environment alongside the new release, ensuring smooth transitions without service interruption.

To implement a canary deployment, gradually route a subset of user traffic to the new version while monitoring health checks and errors. This progressive delivery method allows you to verify stability before a full rollout and ensures a quick rollback if issues arise.

Choose a blue-green deployment when you need an instant switch and rollback capability between two identical environments. Rolling updates progressively replace instances and are better suited for scaling out changes gradually without maintaining a full duplicate environment.

Safely execute a rollback by following predefined procedures to route traffic back to the previous stable version. Using blue-green or canary patterns ensures the rollback is immediate, preventing prolonged downtime or user impact from a failed release.

Feature flags are essential for progressive delivery, allowing you to decouple deployment from release and control feature visibility. They provide risk reduction by enabling targeted rollouts and instant feature toggling without requiring a full deployment rollback.