A company has developed a Ruby on Rails content management platform. Currently, OpsWorks has several stacks for dev, staging, and production to deploy and manage the application. Now the company wants to start using Python instead of Ruby and needs a smoother transition without any interruption. The company needs to cut over from the existing Ruby code to the Python code. How should the company manage the new deployment? Choose the correct answer from the options below.

Answer options:

A.Update the existing stack with Python application code and deploy it using the deploy life-cycle action to implement the application code.
B.Create a new stack that contains a new layer with the Python code. To cut over to the new stack, the company should consider using Blue/Green deployment.
C.Create a new stack that contains the Python application code and manage separate deployments of the application via the secondary stack using the deploy lifecycle action to implement the application code.
D.Create a new stack that contains the Python application code and manages separate deployments of the application via the secondary stack.

Answer – B
Blue/green deployment is a technique for releasing applications by shifting traffic between two identical environments running different versions of the application. Blue/green deployments can mitigate common risks associated with deploying software, such as downtime and rollback capability.
Please find the below link on a white paper for blue-green deployments.
https://d0.awsstatic.com/whitepapers/AWS_Blue_Green_Deployments.pdf
Options A, C and D are INCORRECT because the company needs to cut over from the existing Ruby code to the Python code, and these options do not mention the scenario for cutover.