SAA-C03 Question 129
Select 3A company wants to migrate their existing monolithic application into containers to improve scalability and resource utilization. They are planning to use Amazon ECS with the Fargate launch type. What steps should they take to ensure a successful containerization and deployment of their application?
- A
Refactor the application into smaller microservices to improve scalability and deployability.
- B
Create a Dockerfile to containerize the application and define its runtime environment.
- C
Use AWS CloudFormation to build and manage the container images directly.
- D
Define task definitions in Amazon ECS to specify container configurations, resource requirements, and networking options.
- E
Configure an Amazon EFS volume to store container images during runtime.
Show answer and explanation
Correct answers: A, B, D
Explanation
To migrate an application into containers using Amazon ECS with Fargate, the application should first be refactored into smaller microservices, if necessary, to maximize scalability. A Dockerfile is required to package the application into a container image. Task definitions in ECS are critical to define how containers run within the cluster. AWS CloudFormation and Amazon EFS are valuable but do not directly contribute to building or running the containers themselves, making these options incorrect for this scenario.
- A. Correct.
Refactoring into microservices helps optimize the application for containerization and allows it to take full advantage of container orchestration tools like Amazon ECS.
- B. Correct.
Creating a Dockerfile is essential to containerize the application by defining its runtime environment, dependencies, and instructions for building the container image.
- C. Incorrect.
AWS CloudFormation is used for infrastructure as code and is not used to build or manage container images directly. It can be used to deploy ECS resources but not for creating images.
- D. Correct.
Task definitions in Amazon ECS are crucial for defining how containers should run, including resource allocation, networking, and other configurations.
- E. Incorrect.
Amazon EFS is used for shared storage across applications but is not used to store container images. Container images are stored in Amazon ECR or Docker Hub.