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DVA-C02: How to Understand AWS CodeDeploy Hooks for In-Place Deployments

Learn how to use AWS CodeDeploy hooks to customize the deployment process for your applications. This tutorial will explain the run order of the hooks for in-place deployments and how to configure them in your appspec.yml file.

Question

For a deployment using AWS Code Deploy, what is the run order of the hooks for in-place deployments?

A. BeforeInstall -> ApplicationStop -> ApplicationStart -> AfterInstall
B. ApplicationStop -> BeforeInstall -> AfterInstall -> ApplicationStart
C. BeforeInstall -> ApplicationStop -> ValidateService -> ApplicationStart
D. ApplicationStop -> BeforeInstall -> ValidateService -> ApplicationStart

Answer

A. BeforeInstall -> ApplicationStop -> ApplicationStart -> AfterInstall

Explanation

The correct answer is B. ApplicationStop -> BeforeInstall -> AfterInstall -> ApplicationStart. This answer is based on the documentation of AWS CodeDeploy, which states that in an in-place deployment, including the rollback of an in-place deployment, event hooks are run in the following order:

  • ApplicationStop: This event occurs before the existing application is stopped. It is used to gracefully stop tasks that do not stop when the application is stopped, such as tasks that are detached or forked.
  • BeforeInstall: This event occurs before the updated application is installed. It is used to perform tasks such as backing up configuration files or creating directories.
  • AfterInstall: This event occurs after the updated application is installed. It is used to perform tasks such as changing permissions, restarting services, or configuring settings.
  • ApplicationStart: This event occurs after the updated application is started. It is used to perform tasks such as running tests or verifying the status of the application.

The other options are not correct because:

  • Option A: BeforeInstall -> ApplicationStop -> ApplicationStart -> AfterInstall is not the correct order of hooks for in-place deployments. The ApplicationStop hook should be run before the BeforeInstall hook, not after it.
  • Option C: BeforeInstall -> ApplicationStop -> ValidateService -> ApplicationStart is not the correct order of hooks for in-place deployments. The ValidateService hook is not used for in-place deployments, but for blue/green deployments.
  • Option D: ApplicationStop -> BeforeInstall -> ValidateService -> ApplicationStart is not the correct order of hooks for in-place deployments. The ValidateService hook is not used for in-place deployments, but for blue/green deployments.

Therefore, option B is the best answer for this question. I hope this explanation helps you understand the concept of AWS CodeDeploy hooks for in-place deployments better.

The latest AWS Certified Developer – Associate DVA-C02 certification actual real practice exam question and answer (Q&A) dumps are available free, which are helpful for you to pass the AWS Certified Developer – Associate DVA-C02 exam and earn AWS Certified Developer – Associate DVA-C02 certification.

AWS Certified Developer - Associate DVA-C02 Exam Questions and Answers

Alex Lim is a certified IT Technical Support Architect with over 15 years of experience in designing, implementing, and troubleshooting complex IT systems and networks. He has worked for leading IT companies, such as Microsoft, IBM, and Cisco, providing technical support and solutions to clients across various industries and sectors. Alex has a bachelor’s degree in computer science from the National University of Singapore and a master’s degree in information security from the Massachusetts Institute of Technology. He is also the author of several best-selling books on IT technical support, such as The IT Technical Support Handbook and Troubleshooting IT Systems and Networks. Alex lives in Bandar, Johore, Malaysia with his wife and two chilrdren. You can reach him at [email protected] or follow him on Website | Twitter | Facebook

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