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NEW QUESTION: 1
You recently encountered a major bug in your web application during a deployment cycle. During this failed deployment, it took the team four hours to roll back to a previously working state, which left customers with a poor user experience. During the post-mortem, you team discussed the need to provide a quicker, more robust way to roll back failed deployments. You currently run your web application on Amazon EC2 and use Elastic Load Balancingforyour load balancing needs.
Which technique should you use to solve this problem?
A. Createdeployable versioned bundles of your application. Store the bundle on AmazonS3. Re-deploy your web application on Elastic Beanstalk and enable the ElasticBeanstalk auto - rollbackfeature tied to Cloud Watch metrics that definefailure.
B. UsingElastic BeanStalk redeploy your web application and use the Elastic BeanStalkAPI to trigger a FailedDeployment API call to initiate a rollback to theprevious version.
C. Createdeployable versioned bundles of your application. Store the bundle on AmazonS3. Use an AWS OpsWorks stack to redeploy your web application and use AWSOpsWorks application versioningto initiate a rollback during failures.
D. Usean AWS OpsWorks stack to re-deploy your web application and use AWS OpsWorksDeploymentCommand to initiate a rollback during failures.
Answer: D
Explanation:
Explanation
The AWS Documentation mentions the following
AWS DeploymentCommand has a rollback option in it. Following commands are available for apps to use:
deploy: Deploy App.
Ruby on Rails apps have an optional args parameter named migrate. Set Args to {"migrate":["true"]) to migrate the database.
The default setting is {"migrate": ["false"]).
The "rollback" feature Rolls the app back to the previous version.
When we are updating an app, AWS OpsWorks stores the previous versions, maximum of upto five versions.
We can use this command to roll an app back as many as four versions.
Reference Link:
* http://docs