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Microservices Architecture Guide

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Service decomposition patterns, API gateway configs, service mesh setup, and observability instrumentation.

📁 24 files

JSONPythonTerraformYAMLMarkdownKubernetesAWS

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📁 File Structure 24 files

microservices-architecture-guide/ ├── LICENSE ├── README.md ├── cloudformation/ │ ├── api-gateway.yaml │ ├── ecs-service-mesh.yaml │ └── observability-stack.yaml ├── docs/ │ ├── architecture.md │ ├── decomposition-patterns.md │ └── observability-guide.md ├── examples/ │ ├── api-gateway-openapi.yaml │ └── service-catalog.json ├── free-sample.zip ├── guide/ │ ├── 01_overview.md │ ├── 02_prerequisites.md │ └── 03_faq.md ├── index.html ├── kubernetes/ │ ├── istio-virtualservice.yaml │ ├── network-policies.yaml │ └── service-deployment.yaml ├── scripts/ │ ├── api_contract_generator.py │ └── service_decomposition_analyzer.py └── terraform/ ├── api-gateway.tf ├── ecs-fargate-service.tf ├── service-mesh.tf └── variables.tf

📖 Documentation Preview README excerpt

Microservices Architecture Guide

Production-ready service decomposition patterns, API gateway configurations, service mesh setup, and observability instrumentation for cloud-native microservices.

Overview

This guide provides battle-tested IaC templates and patterns for building a microservices architecture on AWS. It covers the full stack from service decomposition strategy through deployment, networking (API Gateway + service mesh), and end-to-end observability. Every template is deployable and extensively commented.

What's Included

File	Description
`cloudformation/api-gateway.yaml`	API Gateway with Lambda authorizer, rate limiting, WAF integration
`cloudformation/ecs-service-mesh.yaml`	ECS Fargate services with App Mesh sidecar proxies
`cloudformation/observability-stack.yaml`	CloudWatch, X-Ray, Container Insights, custom dashboards
`terraform/api-gateway.tf`	Terraform API Gateway with OpenAPI integration
`terraform/ecs-fargate-service.tf`	ECS Fargate service module with auto-scaling
`terraform/service-mesh.tf`	App Mesh virtual services, routers, and nodes
`terraform/variables.tf`	Shared variables for all Terraform configurations
`kubernetes/service-deployment.yaml`	K8s Deployment with readiness/liveness probes
`kubernetes/istio-virtualservice.yaml`	Istio traffic management and circuit breaking
`kubernetes/network-policies.yaml`	K8s NetworkPolicy for service isolation
`scripts/service_decomposition_analyzer.py`	Analyzes domain boundaries and suggests decomposition
`scripts/api_contract_generator.py`	Generates OpenAPI specs from service definitions
`docs/architecture.md`	Reference architecture with Mermaid diagrams
`docs/decomposition-patterns.md`	Service decomposition decision framework
`docs/observability-guide.md`	Observability instrumentation guide
`examples/api-gateway-openapi.yaml`	OpenAPI 3.0 spec for a sample API
`examples/service-catalog.json`	Example service registry / catalog
`LICENSE`	MIT License

Architecture at a Glance


┌─────────────────────────────────────────────────────────┐
│                   API Gateway / ALB                      │
│               (Rate limiting, Auth, WAF)                 │
├──────────┬──────────┬───────────┬───────────────────────┤
│          │          │           │                         │
│  User    │  Order   │  Product  │   Payment              │
│  Service │  Service │  Service  │   Service              │
│  (ECS)   │  (ECS)   │  (ECS)   │   (ECS)               │
│          │          │           │                         │
├──────────┴──────────┴───────────┴───────────────────────┤
│              Service Mesh (App Mesh / Istio)             │
│         (mTLS, Circuit Breaking, Retries, Tracing)       │
├─────────────────────────────────────────────────────────┤
│              Observability (X-Ray, CloudWatch)           │
│        (Distributed tracing, Metrics, Structured logs)   │
└─────────────────────────────────────────────────────────┘

Prerequisites

AWS Account with ECS, API Gateway, App Mesh, CloudWatch, X-Ray permissions
AWS CLI v2 configured
Python 3.10+ (for helper scripts)
Terraform >= 1.5 (if using Terraform templates)
kubectl + eksctl (if using Kubernetes templates)

... continues with setup instructions, usage examples, and more.

📄 Code Sample .py preview

scripts/api_contract_generator.py #!/usr/bin/env python3 """ API Contract Generator Generates OpenAPI 3.0 specifications from a service catalog definition. Creates consistent API contracts for microservices with: - Standard error response schemas - Health check endpoints - Pagination patterns - Authentication headers Usage: python3 api_contract_generator.py --catalog examples/service-catalog.json --output api-spec.yaml Python 3.10+ required. No external dependencies (stdlib only). """ from __future__ import annotations import argparse import json import logging import sys from dataclasses import dataclass, field from pathlib import Path from typing import Any logging.basicConfig(level=logging.INFO, format="%(asctime)s [%(levelname)s] %(message)s") logger = logging.getLogger(__name__) @dataclass class ServiceEndpoint: """An API endpoint definition.""" path: str method: str summary: str description: str request_body: dict | None = None response_schema: dict | None = None query_params: list[dict] = field(default_factory=list) requires_auth: bool = True tags: list[str] = field(default_factory=list) @dataclass class ServiceDefinition: """A microservice's API contract definition.""" name: str description: str # ... 366 more lines ...

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