You have a web application hosted on EC2 instances. There are application changes which happen to the web application on a quarterly basis. Which of the following are example of Blue Green deployments which can be applied to the application? Choose 2 answers from the options given below

Answer options:

A.Deploy the application to an elastic beanstalk environment. Have a secondary elastic beanstalk environment in place with the updated application code. Use the swap URL’s feature to switch onto the new environment.
B.Place the EC2 instances behind an ELB. Have a secondary environment with EC2 Instances and ELB in another region. Use Route53 with geo-location to route requests and switch over to the secondary environment.
C.Deploy the application using Opswork stacks. Have a secondary stack for the new application deployment. Use Route53 to switch over to the new stack for the new application update.
D.Deploy the application to an elastic beanstalk environment. Use the Rolling updates feature to perform a Blue Green deployment.

Answer – A and C
The AWS Documentation mentions the following
AWS Elastic Beanstalk is a fast and simple way to get an application up and running on AWS.6 It’s perfect for developers who want to deploy code without worrying about managing the underlying infrastructure. Elastic Beanstalk supports Auto Scaling and Elastic Load Balancing, both of which enable blue/green deployment. Elastic Beanstalk makes it easy to run multiple versions of your application and provides capabilities to swap the environment URLs, facilitating blue/green deployment.
AWS OpsWorks is a configuration management service based on Chef that allows customers to deploy and manage application stacks on AWS.7 Customers can specify resource and application configuration, and deploy and monitor running resources. OpsWorks simplifies cloning entire stacks when you’re preparing blue/green environments.
For more information on Blue Green deployments, please refer to the below link:
https://d0.awsstatic.com/whitepapers/AWS_Blue_Green_Deployments.pdf