Blue-Green Deployment - CI/CD Glossary Definition

Blue-green deployment switches traffic between two full environments for instant cutover and rollback.

A blue-green deployment runs two identical environments (blue and green); the new version is deployed to the idle one and traffic is switched over at once, enabling instant rollback.

You deploy and verify the new version on the idle environment, then flip the router; if something breaks you flip back, avoiding the partial-state risk of an in-place update.

Related guides