Question

How do you implement blue-green deployments in Jenkins for a zero-downtime release? Can you provide a Jenkinsfile example or configuration for managing these deployments?

This question seeks your approach to achieving seamless, zero-downtime releases by using a blue-green deployment strategy within Jenkins. The focus is on setting up a Jenkins pipeline that can direct traffic between two identical production environments and automate the process. You should discuss pipeline configuration, traffic switching, and fallbacks in case of issues with the new version.

Answer 1

To deploy Blue-Green deployment in Jenkins for zero-downtime release:

Deploy to Green: Deploy new version on "green" while "blue" remains live.

Run tests on a green build to ensure stability.

Switch Traffic: Update the load balancer to now send traffic from the blue to the green once tests pass.
Monitor & Rollback: Monitor for problems and when problems exist, roll back traffic to blue.

This setup ensures quick rollback and zero downtime by switching between identical environments.