AWS Architecture Overview

This diagram illustrates a robust, scalable, and secure AWS-based architecture for our API service. The architecture leverages various AWS services to ensure high availability, performance, and security.

Cloud Architecture

Key Components

Networking

• VPC (Virtual Private Cloud): Provides an isolated network environment.
  • Public Subnet: Houses public-facing components.
  • Private Subnet: Contains the core application and data services, isolated from direct internet access.
• NAT Gateway: Allows outbound internet access from the private subnet.
• Application Load Balancer (ALB): Distributes incoming traffic across multiple targets in the private subnet.

Compute and Container Services

• ECS Fargate Service: Runs containerized applications without managing the underlying infrastructure.
• Public ECR Registry: Stores and manages Docker container images used by the ECS service.

Database and Caching

• RDS PostgreSQL: Managed relational database service for persistent data storage.
• ElastiCache Redis: In-memory caching to improve application performance.

Messaging and AI

• Amazon MQ (RabbitMQ): Managed message broker service for application decoupling.
• AWS Bedrock: Provides access to foundation models for AI and machine learning capabilities.

Security and Access Management

• Secrets Manager: Securely stores and manages sensitive information like API keys and database credentials.
• IAM Roles & Policies: Manages fine-grained access controls for AWS services and resources.

DNS and Routing

• Route 53: Manages domain names and routes incoming requests to the Application Load Balancer.

Data Flow

1. Internet traffic is routed through Route 53 to the Application Load Balancer.
2. The ALB forwards requests to the ECS Fargate service in the private subnet.
3. The ECS service interacts with various backend services (RDS, Redis, RabbitMQ, AWS Bedrock) as needed.
4. For outbound requests (e.g., pulling Docker images), traffic goes through the NAT Gateway.

Security Considerations

• The architecture follows AWS best practices for security, including the use of public and private subnets.
• Sensitive services are placed in the private subnet, inaccessible directly from the internet.
• IAM roles and policies ensure least-privilege access to AWS resources.
• Secrets Manager is used for secure storage and retrieval of sensitive information.

This architecture provides a scalable, secure, and highly available environment for hosting and managing API services, leveraging AWS's managed services to reduce operational overhead and improve reliability.