Which solution will meet these requirements?
Use AWS Elastic Beanstalk to host the static content and the PHP application. Configure Elastic Beanstalk to deploy its EC2 instance into a public subnet. Assign a public IP address.
Use AWS Lambda to host the static content and the PHP application. Use an Amazon API Gateway REST API to proxy requests to the Lambda function. Set the API Gateway CORS configuration to respond to the domain name. Configure Amazon ElastiCache for Redis to handle session information.
Keep the backend code on the EC2 instance. Create an Amazon ElastiCache for Redis cluster that has Multi-AZ enabled. Configure the ElastiCache for Redis cluster in cluster mode. Copy the frontend resources to Amazon S3. Configure the backend code to reference the EC2 instance.
Configure an Amazon CloudFront distribution with an Amazon S3 endpoint to an S3 bucket that is configured to host the static content. Configure an Application Load Balancer that targets an Amazon Elastic Container Service (Amazon ECS) service that runs AWS Fargate tasks for the PHP application. Configure the PHP application to use an Amazon ElastiCache for Redis cluster that runs in multiple Availability Zones.
Explanations:
While Elastic Beanstalk can manage the application, deploying into a public subnet with a public IP may not provide high availability. Elastic Beanstalk is suitable for deployment but does not utilize managed services like S3 for static content or ElastiCache for Redis, which are better suited for high availability.
Using AWS Lambda and API Gateway is a serverless approach, but it is not optimal for a PHP application, which typically requires a more persistent execution environment. Additionally, using Lambda for session management could complicate state management and lead to issues with session persistence, even with ElastiCache.
This option retains the EC2 instance for backend code, which does not fully utilize AWS managed services for high availability. Although ElastiCache for Redis is included for session management, relying on EC2 instances does not guarantee high availability and scalability as much as container or serverless solutions would.
This option leverages AWS managed services effectively. Amazon S3 for static content, CloudFront for content delivery, and an Application Load Balancer with ECS (Fargate) for the PHP application provides high availability. The use of ElastiCache for Redis in multiple Availability Zones enhances reliability and scalability, aligning with best practices for high availability.
I would say the answer is:
Configure an Amazon CloudFront distribution with an Amazon S3 endpoint to an S3 bucket that is configured to host the static content. Configure an Application Load Balancer that targets an Amazon Elastic Container Service (Amazon ECS) service that runs AWS Fargate tasks for the PHP application. Configure the PHP application to use an Amazon ElastiCache for Redis cluster that runs in multiple Availability Zones.