You are planning to build a serverless application with microservices using AWS Code Build. This application will be using AWS Lambda. How will you specify AWS SAM CLI & Application package within the build spec file of an AWS CodeBuild?

Answer options:

A.Use aws-sam-cli in the install phase & sam package in the build phase of the BuildSpec file.
B.Use aws-sam-cli in the pre-build phase & sam package in the post_build phase of the BuildSpec file.
C.Use aws-sam-cli in the install phase & sam package in the pre_build phase of the BuildSpec file.
D.Use aws-sam-cli in the pre-build phase & sam package in the install phase of the BuildSpec file.

Correct Answer – A
AWS SAM CLI needs to be installed during the install phase of AWS CodeBuild, while AWS SAM package needs to be specified in the Build section, creating a zip file of code & upload to Amazon S3.
Refer page 149 on the below link:
https://docs.aws.amazon.com/codepipeline/latest/userguide/codepipeline-user.pdf
Option B is incorrect as AWS-sam-cli needs to be installed in the install phase & not in the pre-build phase.
Option C is incorrect as the sam package needs to be specified in the post-build section & not in the pre-build phase.
Option D is incorrect as AWS-sam-cli needs to be installed in the install phase & not in the pre-build phase. sam package needs to be specified in the post-build section & not in the install phase.
 For more information on using AWS SAM with AWS CodeBuild, refer to the following URLs-
https://aws.amazon.com/blogs/devops/building-and-testing-polyglot-applications-using-aws-codebuild/
https://docs.aws.amazon.com/serverless-application-model/latest/developerguide/sam-cli-command-reference-sam-build.html