As a DevOps engineer, you are supporting the development team to deploy a new e-commerce software. You have used AWS CodeDeploy to deploy the latest software release to several AWS EC2 instances. In this CodeDeploy application, there are two Deployment groups called Stage and Prod. Currently, the only difference between Stage and Prod is the logging level which can be configured in a file. What is the most efficient way to implement the different logging levels for Deployment groups Stage and Prod?

Answer options:

A.Create two source versions of script files in the BeforeInstall hook. One version has its logging level setting for Deployment Group “Stage”. And the other one has its logging level setting for “Prod”. Choose the relevant source files when creating a new deployment.
B.For the script file in the BeforeInstall hook, use the environment variable DEPLOYMENT_GROUP_NAME to determine the Deployment Group. Then modify the logging level accordingly in the script.
C.In the hook script file, use the environment variable DEPLOYMENT_ID to determine which Deployment Group it is. Then modify the logging level accordingly in the script.
D.Create two script files. One version has its logging level setting for “Stage”. And the other one has its logging level setting for “Prod”. Modify the Deployment Group configurations to use the correct script file.

Correct Answer – B
Since the only difference between Deployment Groups is logging level, the same set of sources files should be used with an environment variable to determine the Deployment Group.
About how to use environment variables in AppSec files, check this link https://docs.aws.amazon.com/codedeploy/latest/userguide/reference-appspec-file-structure-hooks.html.
Option A is incorrect: This is not the best solution as two revisions of files have to be maintained.
Option B is CORRECT: Because DEPLOYMENT_GROUP_NAME is the correct environment variable to determine the Deployment Group. The below code can be used in the script file:
if [ "$DEPLOYMENT_GROUP_NAME" == "Staging" ]
then
//modify the logging level here for Staging deployments.
fi
Option C is incorrect: Because DEPLOYMENT_ID is used to tell the specific deployment that is unsuitable for this case.
Option D is incorrect: Because it should not maintain two versions of files. Besides, Deployment Groups cannot be configured to use script files.