Question

How do you handle rollbacks in Jenkins pipelines in case of failed deployments? Could you share a Jenkinsfile with rollback logic for a safer deployment?

Here, you’re asked to detail strategies for rollback automation in Jenkins to ensure smooth recovery when deployments fail. A Jenkinsfile example with rollback logic for safely reverting to a previous version of the application should be provided. Discuss key aspects like detecting failures, managing rollback triggers, and ensuring minimal impact on users.

Answer 1

To manage rollbacks in Jenkins pipelines for deployments that failed, logic should be applied to validate the success of every deployment. In the event of a failed deployment, the pipeline is automatically triggered into a rollback of the previous stable version.

Rollback Strategy
Deploy New Version: This will deploy the newest version of the application.
Verify Deployment: Run the deployment. Report if it fails, which would trigger a rollback.
Roll back to previous version: revert to last successful deployment.

Sample Jenkinsfile with Rollback Logic

Explanation
Deploy the New Version: It deploys the latest version with rollback logic in case of errors.
Test deployment: It tests the deployment; while testing, if there is a failure in a test, it will roll back to the previous version.
This configuration offers a roll-back mechanism that is safe. It will lead to stability due to rolling back at the point of failure to a known good state.