Avoiding Application Version Limit in Elastic Beanstalk

Answer - D.

The AWS Documentation mentions.

Each time you upload a new version of your application with the Elastic Beanstalk console or the EB CLI, Elastic Beanstalk creates an application version.

If you don't delete versions that you no longer use, you will eventually reach the application version limit and be unable to create new versions of that application.

You can avoid hitting the limit by applying an application version lifecycle policy to your applications.

A lifecycle policy tells Elastic Beanstalk to delete application versions that are old, or to delete application versions when the total number of versions for an application exceeds a specified number.

For more information on Elastic Beanstalk lifecycle policies please see the below link:

http://docs.aws.amazon.com/elasticbeanstalk/latest/dg/applications-lifecycle.html

As a DevOps engineer responsible for deploying multiple versions of your application in Elastic Beanstalk, you need to ensure that you do not cross the application version limit to maintain a stable environment. Elastic Beanstalk offers a number of features to manage application versions, including lifecycle policies, which is the ideal way to manage versions.

Lifecycle policies allow you to define rules for managing application versions. You can specify the maximum number of versions to keep and the actions to take when you reach that limit. This can include deleting the oldest versions automatically, or archiving them to Amazon S3.

To create a lifecycle policy in Elastic Beanstalk, you need to perform the following steps:

1. Open the Elastic Beanstalk console.
2. Select the environment for which you want to create a lifecycle policy.
3. Choose Configuration > Instance Refresh and Lifecycle.
4. Under Lifecycle Policy, select Add policy.
5. Define the policy by setting the maximum number of versions to keep and the actions to take when you reach that limit.
6. Save the policy.

Once you create a lifecycle policy, Elastic Beanstalk will automatically manage the application versions according to the defined policy, which helps to ensure that you do not cross the version limit. This eliminates the need to manually delete older versions or create custom scripts or lambda functions to manage versions.

Option A, creating a lambda function to delete older versions, is a possible solution but requires additional development work and maintenance. Option B, creating a script to delete older versions, is also a possible solution but requires manual intervention to execute the script. Option C, using AWSConfig to delete older versions, is not applicable in this scenario as AWSConfig is a service that helps monitor and record configuration changes but does not manage application versions.

In conclusion, using lifecycle policies in Elastic Beanstalk is the ideal way to ensure that you do not cross the application version limit and automate version management.