You have a number of Lambda functions that need to be deployed using AWS CodeDeploy.
The lambda functions have gone through multiple code revisions, and versioning in Lambda is being used to maintain the revisions.
Which of the following must be done to ensure that the right version of the function is deployed in AWS CodeDeploy?
Click on the arrows to vote for the correct answer
A. B. C. D.Answer - A.
The AWS Documentation mentions the following.
If your application uses the AWS Lambda compute platform, the AppSpec file can be formatted with either YAML or JSON.
It can also be typed directly into an editor in the console.
The AppSpec file is used to specify.
The AWS Lambda function version to deploy.
The functions to be used as validation tests.
Option B is incorrect because you cannot specify the version in the BuildSpec file, as it is a collection of build commands and related settings, in YAML format, that CodeBuild uses to run a build.
Option C and D are incorrect because both options do not mention how to use the variable or alias of the Lambda function.
The CodeDeploy AppSpec file should be used to specify the Lambda function version.
Option A is more accurate.
For more information on the application specification files, please refer to the below Link-
https://docs.aws.amazon.com/codedeploy/latest/userguide/application-specification-files.htmlWhen deploying Lambda functions using AWS CodeDeploy, the correct version of the function needs to be specified to ensure that the desired code is deployed. Versioning in Lambda can be used to maintain the revisions of the code, and there are different ways to specify the version to be deployed in CodeDeploy.
Let's review the options provided in the question:
A. Specify the version to be deployed in the AppSpec file.
AWS CodeDeploy uses an AppSpec file to define the deployment instructions for an application. The AppSpec file specifies the source files to be deployed, the destination locations for the files, and any hooks or scripts to be run during the deployment process. It is possible to specify the version of the Lambda function to be deployed in the AppSpec file, using the "LambdaRevision" property. This is a valid option for ensuring that the right version of the function is deployed in CodeDeploy.
B. Specify the version to be deployed in the BuildSpec file.
AWS CodeBuild uses a BuildSpec file to define the build and packaging instructions for a project. The BuildSpec file specifies the build environment, the build commands, and the artifacts to be generated by the build process. It is not possible to specify the version of the Lambda function to be deployed in the BuildSpec file, as this file is used for the build process, not for the deployment process. This option is not valid for ensuring that the right version of the function is deployed in CodeDeploy.
C. Create a Lambda function environment variable called ‘VER' and mention the version that needs to be deployed.
Lambda function environment variables can be used to pass configuration information to the function code. However, setting an environment variable called "VER" with the desired version of the function is not a valid way to ensure that the right version of the function is deployed in CodeDeploy. Environment variables are not used by CodeDeploy to determine which version of the function to deploy.
D. Create an ALIAS for the Lambda function. Mark this as the recent version. Use this ALIAS in CodeDeploy.
An alias is a pointer to a specific version of a Lambda function. By creating an alias and associating it with the desired version of the function, it is possible to ensure that the right version of the function is deployed in CodeDeploy. The alias can be used in the AppSpec file to specify the function to be deployed, and any subsequent updates to the alias will automatically route traffic to the new version. This is a valid option for ensuring that the right version of the function is deployed in CodeDeploy.
In summary, the correct answers for ensuring that the right version of the function is deployed in AWS CodeDeploy are: