Deployment Strategies
Canary and Blue-Green Deployments
These rollout patterns help teams ship safely, reduce downtime, and spot problems before they affect everyone.
Canary Deployment
Release gradually
A canary deployment sends a small slice of live traffic to the new version first. If metrics, logs, and user behavior look healthy, you slowly increase traffic until the new version serves everyone.
Why teams use it
It lowers risk because issues show up early, while the impact is still limited to a small audience.
Tradeoffs
Canary rollouts need strong observability and traffic controls so you can compare old and new versions with confidence.
Blue-Green Deployment
Switch environments
A blue-green deployment keeps two full environments running: one live and one idle. You deploy the new version to the idle environment, test it, then switch production traffic over in one step.
Why teams use it
It makes rollback fast because the previous environment is still available if the new one has trouble.
Tradeoffs
Running two environments can cost more, and switching everything at once still needs careful validation.
When to use each
Choose canary deployments when you want to validate a release with real traffic in small steps. Choose blue-green deployments when you want a clean environment switch and a straightforward rollback path.