In blue-green deployment, what is the purpose of switching user traffic to the green environment?

In blue-green deployment, what is the purpose of switching user traffic to the green environment?

• A. Delete the blue environment.
• B. Synchronize time across environments.
• C. Switch user traffic to green environment to serve production traffic from the newly deployed version.
• D. Remove tests.

Answer: (C)

In blue-green deployment, the main idea is to have two production-like environments, one serving live traffic and the other holding a fresh release. Switching user traffic to the green environment means directing production requests to the environment that already contains the newly deployed version. This lets you release the new version to users with minimal risk and downtime, because the old version remains available in the blue environment as a ready-to-switch back to if issues arise. If problems are detected, you can quickly flip traffic back to the blue environment, achieving a fast rollback. The purpose isn’t to delete the blue environment, synchronize time, or remove tests—the traffic switch is about delivering the new version to users and enabling rapid rollback if needed.

In blue-green deployment, the main idea is to have two production-like environments, one serving live traffic and the other holding a fresh release. Switching user traffic to the green environment means directing production requests to the environment that already contains the newly deployed version. This lets you release the new version to users with minimal risk and downtime, because the old version remains available in the blue environment as a ready-to-switch back to if issues arise. If problems are detected, you can quickly flip traffic back to the blue environment, achieving a fast rollback. The purpose isn’t to delete the blue environment, synchronize time, or remove tests—the traffic switch is about delivering the new version to users and enabling rapid rollback if needed.