AWS Certified Solutions Architect - Associate
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A solutions architect is implementing a complex Java application with a MySQL database. The Java application must be deployed on Apache Tomcat and must be highly available.
What should the solutions architect do to meet these requirements?
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A
Deploy the application in AWS Lambda. Configure an Amazon API Gateway API to connect with the Lambda functions.
B
Deploy the application by using AWS Elastic Beanstalk. Configure a load-balanced environment and a rolling deployment policy.
C
Migrate the database to Amazon ElastiCache. Configure the ElastiCache security group to allow access from the application.
D
Launch an Amazon EC2 instance. Install a MySQL server on the EC2 instance. Configure the application on the server. Create an AMI. Use the AMI to create a launch template with an Auto Scaling group.
Explanation:
Explanation
Correct Answer: B
Why Option B is correct:
- AWS Elastic Beanstalk is specifically designed for deploying and managing web applications (including Java/Tomcat applications) with minimal infrastructure management.
- Load-balanced environment ensures high availability by distributing traffic across multiple instances.
- Rolling deployment policy allows for zero-downtime deployments, maintaining application availability during updates.
- Elastic Beanstalk automatically handles capacity provisioning, load balancing, auto-scaling, and application health monitoring.
- For the MySQL database, the architect would typically use Amazon RDS for MySQL (managed database service) which provides high availability, automated backups, and easy scaling.
Why other options are incorrect:
Option A (AWS Lambda):
- Lambda is serverless compute for event-driven applications, not suitable for complex Java applications requiring Apache Tomcat.
- Lambda has limitations on execution time (15 minutes max), memory, and doesn't support traditional Java web application deployment patterns.
- Not designed for long-running applications with persistent connections.
Option C (Amazon ElastiCache):
- ElastiCache is an in-memory caching service (Redis/Memcached), not a relational database replacement for MySQL.
- This option only addresses the database aspect incorrectly and doesn't address the Java/Tomcat application deployment requirements.
Option D (EC2 with manual setup):
- While this could work, it requires significant manual configuration and management.
- Installing MySQL on EC2 instances doesn't provide the same level of high availability, automated backups, and managed services as Amazon RDS.
- The approach is more complex and error-prone compared to using managed services like Elastic Beanstalk and RDS.
- Auto Scaling groups help with availability but don't provide the same level of application management as Elastic Beanstalk.
Key AWS Services for this scenario:
- AWS Elastic Beanstalk - For deploying and managing the Java/Tomcat application
- Amazon RDS for MySQL - For the managed MySQL database with high availability
- Application Load Balancer - For distributing traffic across instances
- Auto Scaling - For automatically adjusting capacity based on demand
This combination provides a highly available, scalable, and managed solution that meets all requirements with minimal operational overhead.
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