Go Architecture Patterns Series: ← Previous: Modular Monolith | Series Overview | Next: Event-Driven Architecture →

What is Microservices Architecture?

Microservices Architecture is an approach where an application is composed of small, independent services that communicate over a network. Each service is self-contained, owns its data, and can be deployed, scaled, and updated independently.

Key Principles:

Service Independence: Each service is deployed and scaled independently
Single Responsibility: Each service handles a specific business capability
Decentralized Data: Each service owns its database
API-First Design: Services communicate through well-defined APIs
Resilience: Services handle failures gracefully
Technology Diversity: Services can use different technologies

Architecture Overview

graph TB subgraph "Client Layer" Client[Web/Mobile Client] end subgraph "API Gateway" Gateway[API Gateway / Load Balancer] end subgraph "Service Mesh" UserService[User Service] ProductService[Product Service] OrderService[Order Service] PaymentService[Payment Service] NotificationService[Notification Service] end subgraph "Data Layer" UserDB[(User DB)] ProductDB[(Product DB)] OrderDB[(Order DB)] PaymentDB[(Payment DB)] end subgraph "Infrastructure" MessageBroker[Message Broker] ServiceRegistry[Service Discovery] ConfigServer[Config Server] end Client --> Gateway Gateway --> UserService Gateway --> ProductService Gateway --> OrderService Gateway --> PaymentService UserService --> UserDB ProductService --> ProductDB OrderService --> OrderDB PaymentService --> PaymentDB OrderService -.->|HTTP/gRPC| UserService OrderService -.->|HTTP/gRPC| ProductService OrderService -.->|HTTP/gRPC| PaymentService OrderService -.->|Async| MessageBroker PaymentService -.->|Async| MessageBroker NotificationService -.->|Subscribe| MessageBroker UserService -.-> ServiceRegistry ProductService -.-> ServiceRegistry OrderService -.-> ServiceRegistry style UserService fill:#e1f5ff style ProductService fill:#fff4e1 style OrderService fill:#e8f5e9 style PaymentService fill:#f3e5f5 style NotificationService fill:#ffe1f5

Service Communication Patterns

sequenceDiagram participant Client participant Gateway participant OrderSvc as Order Service participant UserSvc as User Service participant ProductSvc as Product Service participant PaymentSvc as Payment Service participant Queue as Message Queue participant NotifySvc as Notification Service Client->>Gateway: Create Order Request Gateway->>OrderSvc: POST /orders OrderSvc->>UserSvc: GET /users/{id} UserSvc-->>OrderSvc: User Data OrderSvc->>ProductSvc: GET /products/{id} ProductSvc-->>OrderSvc: Product Data OrderSvc->>ProductSvc: POST /products/reserve ProductSvc-->>OrderSvc: Stock Reserved OrderSvc->>PaymentSvc: POST /payments PaymentSvc-->>OrderSvc: Payment Success OrderSvc->>Queue: Publish OrderCreated Event Queue->>NotifySvc: OrderCreated Event NotifySvc->>NotifySvc: Send Email/SMS OrderSvc-->>Gateway: Order Created Gateway-->>Client: Response

Real-World Use Cases

E-commerce Platforms: Amazon, eBay with separate services for products, orders, payments
Streaming Services: Netflix with services for recommendations, playback, billing
Ride-Sharing Apps: Uber with services for riders, drivers, payments, routing
Financial Systems: Banking apps with separate services for accounts, transactions, loans
Social Media: Twitter with services for posts, timelines, notifications, messages
Cloud Platforms: AWS-like platforms with independent service offerings

Microservices Implementation

Project Structure (Multi-Repository)

microservices/
├── user-service/
│   ├── cmd/
│   │   └── server/
│   │       └── main.go
│   ├── internal/
│   │   ├── domain/
│   │   ├── handlers/
│   │   ├── repository/
│   │   └── service/
│   ├── proto/
│   │   └── user.proto
│   └── go.mod
├── product-service/
│   ├── cmd/
│   │   └── server/
│   │       └── main.go
│   ├── internal/
│   │   ├── domain/
│   │   ├── handlers/
│   │   ├── repository/
│   │   └── service/
│   └── go.mod
├── order-service/
│   ├── cmd/
│   │   └── server/
│   │       └── main.go
│   ├── internal/
│   │   ├── domain/
│   │   ├── handlers/
│   │   ├── repository/
│   │   ├── service/
│   │   └── clients/
│   └── go.mod
└── api-gateway/
    ├── cmd/
    │   └── server/
    │       └── main.go
    └── go.mod

Service 1: User Service

// user-service/internal/domain/user.go
package domain

import (
    "context"
    "errors"
    "time"
)

type User struct {
    ID        string    `json:"id"`
    Email     string    `json:"email"`
    Name      string    `json:"name"`
    Active    bool      `json:"active"`
    CreatedAt time.Time `json:"created_at"`
}

var (
    ErrUserNotFound = errors.New("user not found")
    ErrUserExists   = errors.New("user already exists")
)

type Repository interface {
    Create(ctx context.Context, user *User) error
    GetByID(ctx context.Context, id string) (*User, error)
    GetByEmail(ctx context.Context, email string) (*User, error)
    Update(ctx context.Context, user *User) error
}

// user-service/internal/service/user_service.go
package service

import (
    "context"
    "fmt"
    "time"

    "user-service/internal/domain"
)

type UserService struct {
    repo domain.Repository
}

func NewUserService(repo domain.Repository) *UserService {
    return &UserService{repo: repo}
}

func (s *UserService) CreateUser(ctx context.Context, email, name string) (*domain.User, error) {
    existing, _ := s.repo.GetByEmail(ctx, email)
    if existing != nil {
        return nil, domain.ErrUserExists
    }

    user := &domain.User{
        ID:        generateID(),
        Email:     email,
        Name:      name,
        Active:    true,
        CreatedAt: time.Now(),
    }

    if err := s.repo.Create(ctx, user); err != nil {
        return nil, fmt.Errorf("failed to create user: %w", err)
    }

    return user, nil
}

func (s *UserService) GetUser(ctx context.Context, id string) (*domain.User, error) {
    return s.repo.GetByID(ctx, id)
}

func (s *UserService) ValidateUser(ctx context.Context, id string) (bool, error) {
    user, err := s.repo.GetByID(ctx, id)
    if err != nil {
        return false, err
    }
    return user.Active, nil
}

func generateID() string {
    return fmt.Sprintf("user_%d", time.Now().UnixNano())
}

// user-service/internal/handlers/http_handler.go
package handlers

import (
    "encoding/json"
    "net/http"

    "github.com/gorilla/mux"
    "user-service/internal/service"
)

type HTTPHandler struct {
    service *service.UserService
}

func NewHTTPHandler(service *service.UserService) *HTTPHandler {
    return &HTTPHandler{service: service}
}

type CreateUserRequest struct {
    Email string `json:"email"`
    Name  string `json:"name"`
}

func (h *HTTPHandler) CreateUser(w http.ResponseWriter, r *http.Request) {
    var req CreateUserRequest
    if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
        respondError(w, http.StatusBadRequest, "invalid request")
        return
    }

    user, err := h.service.CreateUser(r.Context(), req.Email, req.Name)
    if err != nil {
        respondError(w, http.StatusBadRequest, err.Error())
        return
    }

    respondJSON(w, http.StatusCreated, user)
}

func (h *HTTPHandler) GetUser(w http.ResponseWriter, r *http.Request) {
    vars := mux.Vars(r)
    id := vars["id"]

    user, err := h.service.GetUser(r.Context(), id)
    if err != nil {
        respondError(w, http.StatusNotFound, "user not found")
        return
    }

    respondJSON(w, http.StatusOK, user)
}

func (h *HTTPHandler) ValidateUser(w http.ResponseWriter, r *http.Request) {
    vars := mux.Vars(r)
    id := vars["id"]

    valid, err := h.service.ValidateUser(r.Context(), id)
    if err != nil {
        respondError(w, http.StatusNotFound, "user not found")
        return
    }

    respondJSON(w, http.StatusOK, map[string]bool{"valid": valid})
}

func respondJSON(w http.ResponseWriter, status int, data interface{}) {
    w.Header().Set("Content-Type", "application/json")
    w.WriteHeader(status)
    json.NewEncoder(w).Encode(data)
}

func respondError(w http.ResponseWriter, status int, message string) {
    respondJSON(w, status, map[string]string{"error": message})
}

// user-service/cmd/server/main.go
package main

import (
    "database/sql"
    "log"
    "net/http"
    "os"

    "github.com/gorilla/mux"
    _ "github.com/lib/pq"

    "user-service/internal/handlers"
    "user-service/internal/repository"
    "user-service/internal/service"
)

func main() {
    dbURL := os.Getenv("DATABASE_URL")
    if dbURL == "" {
        dbURL = "postgres://user:pass@localhost/users?sslmode=disable"
    }

    db, err := sql.Open("postgres", dbURL)
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    repo := repository.NewPostgresRepository(db)
    svc := service.NewUserService(repo)
    handler := handlers.NewHTTPHandler(svc)

    router := mux.NewRouter()
    router.HandleFunc("/users", handler.CreateUser).Methods("POST")
    router.HandleFunc("/users/{id}", handler.GetUser).Methods("GET")
    router.HandleFunc("/users/{id}/validate", handler.ValidateUser).Methods("GET")

    router.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
        w.WriteHeader(http.StatusOK)
        w.Write([]byte("OK"))
    })

    port := os.Getenv("PORT")
    if port == "" {
        port = "8081"
    }

    log.Printf("User service starting on port %s", port)
    if err := http.ListenAndServe(":"+port, router); err != nil {
        log.Fatal(err)
    }
}

Service 2: Product Service

// product-service/internal/domain/product.go
package domain

import (
    "context"
    "errors"
    "time"
)

type Product struct {
    ID          string    `json:"id"`
    Name        string    `json:"name"`
    Description string    `json:"description"`
    Price       float64   `json:"price"`
    Stock       int       `json:"stock"`
    CreatedAt   time.Time `json:"created_at"`
}

var (
    ErrProductNotFound   = errors.New("product not found")
    ErrInsufficientStock = errors.New("insufficient stock")
)

type Repository interface {
    Create(ctx context.Context, product *Product) error
    GetByID(ctx context.Context, id string) (*Product, error)
    Update(ctx context.Context, product *Product) error
    ReserveStock(ctx context.Context, id string, quantity int) error
}

// product-service/internal/service/product_service.go
package service

import (
    "context"
    "fmt"
    "time"

    "product-service/internal/domain"
)

type ProductService struct {
    repo domain.Repository
}

func NewProductService(repo domain.Repository) *ProductService {
    return &ProductService{repo: repo}
}

func (s *ProductService) CreateProduct(ctx context.Context, name, desc string, price float64, stock int) (*domain.Product, error) {
    product := &domain.Product{
        ID:          generateID(),
        Name:        name,
        Description: desc,
        Price:       price,
        Stock:       stock,
        CreatedAt:   time.Now(),
    }

    if err := s.repo.Create(ctx, product); err != nil {
        return nil, fmt.Errorf("failed to create product: %w", err)
    }

    return product, nil
}

func (s *ProductService) GetProduct(ctx context.Context, id string) (*domain.Product, error) {
    return s.repo.GetByID(ctx, id)
}

func (s *ProductService) ReserveStock(ctx context.Context, id string, quantity int) error {
    product, err := s.repo.GetByID(ctx, id)
    if err != nil {
        return err
    }

    if product.Stock < quantity {
        return domain.ErrInsufficientStock
    }

    return s.repo.ReserveStock(ctx, id, quantity)
}

func generateID() string {
    return fmt.Sprintf("product_%d", time.Now().UnixNano())
}

// product-service/cmd/server/main.go
package main

import (
    "database/sql"
    "encoding/json"
    "log"
    "net/http"
    "os"

    "github.com/gorilla/mux"
    _ "github.com/lib/pq"

    "product-service/internal/repository"
    "product-service/internal/service"
)

func main() {
    dbURL := os.Getenv("DATABASE_URL")
    if dbURL == "" {
        dbURL = "postgres://user:pass@localhost/products?sslmode=disable"
    }

    db, err := sql.Open("postgres", dbURL)
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    repo := repository.NewPostgresRepository(db)
    svc := service.NewProductService(repo)

    router := mux.NewRouter()

    router.HandleFunc("/products/{id}", func(w http.ResponseWriter, r *http.Request) {
        vars := mux.Vars(r)
        product, err := svc.GetProduct(r.Context(), vars["id"])
        if err != nil {
            http.Error(w, err.Error(), http.StatusNotFound)
            return
        }
        json.NewEncoder(w).Encode(product)
    }).Methods("GET")

    router.HandleFunc("/products/reserve", func(w http.ResponseWriter, r *http.Request) {
        var req struct {
            ProductID string `json:"product_id"`
            Quantity  int    `json:"quantity"`
        }
        if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
            http.Error(w, err.Error(), http.StatusBadRequest)
            return
        }

        if err := svc.ReserveStock(r.Context(), req.ProductID, req.Quantity); err != nil {
            http.Error(w, err.Error(), http.StatusBadRequest)
            return
        }

        w.WriteHeader(http.StatusOK)
        json.NewEncoder(w).Encode(map[string]string{"status": "reserved"})
    }).Methods("POST")

    router.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
        w.WriteHeader(http.StatusOK)
    })

    port := os.Getenv("PORT")
    if port == "" {
        port = "8082"
    }

    log.Printf("Product service starting on port %s", port)
    if err := http.ListenAndServe(":"+port, router); err != nil {
        log.Fatal(err)
    }
}

Service 3: Order Service (Orchestrator)

// order-service/internal/clients/user_client.go
package clients

import (
    "context"
    "encoding/json"
    "fmt"
    "net/http"
    "time"
)

type UserClient struct {
    baseURL    string
    httpClient *http.Client
}

func NewUserClient(baseURL string) *UserClient {
    return &UserClient{
        baseURL: baseURL,
        httpClient: &http.Client{
            Timeout: 5 * time.Second,
        },
    }
}

func (c *UserClient) ValidateUser(ctx context.Context, userID string) (bool, error) {
    url := fmt.Sprintf("%s/users/%s/validate", c.baseURL, userID)

    req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
    if err != nil {
        return false, err
    }

    resp, err := c.httpClient.Do(req)
    if err != nil {
        return false, fmt.Errorf("failed to call user service: %w", err)
    }
    defer resp.Body.Close()

    if resp.StatusCode != http.StatusOK {
        return false, fmt.Errorf("user service returned status %d", resp.StatusCode)
    }

    var result struct {
        Valid bool `json:"valid"`
    }

    if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
        return false, err
    }

    return result.Valid, nil
}

// order-service/internal/clients/product_client.go
package clients

import (
    "bytes"
    "context"
    "encoding/json"
    "fmt"
    "net/http"
    "time"
)

type Product struct {
    ID    string  `json:"id"`
    Name  string  `json:"name"`
    Price float64 `json:"price"`
    Stock int     `json:"stock"`
}

type ProductClient struct {
    baseURL    string
    httpClient *http.Client
}

func NewProductClient(baseURL string) *ProductClient {
    return &ProductClient{
        baseURL: baseURL,
        httpClient: &http.Client{
            Timeout: 5 * time.Second,
        },
    }
}

func (c *ProductClient) GetProduct(ctx context.Context, productID string) (*Product, error) {
    url := fmt.Sprintf("%s/products/%s", c.baseURL, productID)

    req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
    if err != nil {
        return nil, err
    }

    resp, err := c.httpClient.Do(req)
    if err != nil {
        return nil, fmt.Errorf("failed to call product service: %w", err)
    }
    defer resp.Body.Close()

    if resp.StatusCode != http.StatusOK {
        return nil, fmt.Errorf("product not found")
    }

    var product Product
    if err := json.NewDecoder(resp.Body).Decode(&product); err != nil {
        return nil, err
    }

    return &product, nil
}

func (c *ProductClient) ReserveStock(ctx context.Context, productID string, quantity int) error {
    url := fmt.Sprintf("%s/products/reserve", c.baseURL)

    reqBody := map[string]interface{}{
        "product_id": productID,
        "quantity":   quantity,
    }

    body, err := json.Marshal(reqBody)
    if err != nil {
        return err
    }

    req, err := http.NewRequestWithContext(ctx, "POST", url, bytes.NewBuffer(body))
    if err != nil {
        return err
    }
    req.Header.Set("Content-Type", "application/json")

    resp, err := c.httpClient.Do(req)
    if err != nil {
        return fmt.Errorf("failed to reserve stock: %w", err)
    }
    defer resp.Body.Close()

    if resp.StatusCode != http.StatusOK {
        return fmt.Errorf("failed to reserve stock: status %d", resp.StatusCode)
    }

    return nil
}

// order-service/internal/service/order_service.go
package service

import (
    "context"
    "fmt"
    "time"

    "order-service/internal/clients"
    "order-service/internal/domain"
)

type OrderService struct {
    repo          domain.Repository
    userClient    *clients.UserClient
    productClient *clients.ProductClient
}

func NewOrderService(
    repo domain.Repository,
    userClient *clients.UserClient,
    productClient *clients.ProductClient,
) *OrderService {
    return &OrderService{
        repo:          repo,
        userClient:    userClient,
        productClient: productClient,
    }
}

func (s *OrderService) CreateOrder(ctx context.Context, userID string, items []domain.OrderItem) (*domain.Order, error) {
    // Validate user via User Service
    valid, err := s.userClient.ValidateUser(ctx, userID)
    if err != nil {
        return nil, fmt.Errorf("failed to validate user: %w", err)
    }
    if !valid {
        return nil, fmt.Errorf("user is not valid")
    }

    // Validate products and calculate total
    var total float64
    for i, item := range items {
        product, err := s.productClient.GetProduct(ctx, item.ProductID)
        if err != nil {
            return nil, fmt.Errorf("failed to get product: %w", err)
        }

        items[i].Price = product.Price
        total += product.Price * float64(item.Quantity)
    }

    // Reserve stock via Product Service
    for _, item := range items {
        if err := s.productClient.ReserveStock(ctx, item.ProductID, item.Quantity); err != nil {
            return nil, fmt.Errorf("failed to reserve stock: %w", err)
        }
    }

    order := &domain.Order{
        ID:        generateID(),
        UserID:    userID,
        Items:     items,
        Total:     total,
        Status:    "pending",
        CreatedAt: time.Now(),
    }

    if err := s.repo.Create(ctx, order); err != nil {
        return nil, fmt.Errorf("failed to create order: %w", err)
    }

    return order, nil
}

func generateID() string {
    return fmt.Sprintf("order_%d", time.Now().UnixNano())
}

// order-service/cmd/server/main.go
package main

import (
    "database/sql"
    "encoding/json"
    "log"
    "net/http"
    "os"

    "github.com/gorilla/mux"
    _ "github.com/lib/pq"

    "order-service/internal/clients"
    "order-service/internal/domain"
    "order-service/internal/repository"
    "order-service/internal/service"
)

func main() {
    dbURL := os.Getenv("DATABASE_URL")
    if dbURL == "" {
        dbURL = "postgres://user:pass@localhost/orders?sslmode=disable"
    }

    userServiceURL := os.Getenv("USER_SERVICE_URL")
    if userServiceURL == "" {
        userServiceURL = "http://localhost:8081"
    }

    productServiceURL := os.Getenv("PRODUCT_SERVICE_URL")
    if productServiceURL == "" {
        productServiceURL = "http://localhost:8082"
    }

    db, err := sql.Open("postgres", dbURL)
    if err != nil {
        log.Fatal(err)
    }
    defer db.Close()

    repo := repository.NewPostgresRepository(db)
    userClient := clients.NewUserClient(userServiceURL)
    productClient := clients.NewProductClient(productServiceURL)
    svc := service.NewOrderService(repo, userClient, productClient)

    router := mux.NewRouter()

    router.HandleFunc("/orders", func(w http.ResponseWriter, r *http.Request) {
        var req struct {
            UserID string              `json:"user_id"`
            Items  []domain.OrderItem  `json:"items"`
        }

        if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
            http.Error(w, err.Error(), http.StatusBadRequest)
            return
        }

        order, err := svc.CreateOrder(r.Context(), req.UserID, req.Items)
        if err != nil {
            http.Error(w, err.Error(), http.StatusBadRequest)
            return
        }

        w.Header().Set("Content-Type", "application/json")
        w.WriteHeader(http.StatusCreated)
        json.NewEncoder(w).Encode(order)
    }).Methods("POST")

    router.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
        w.WriteHeader(http.StatusOK)
    })

    port := os.Getenv("PORT")
    if port == "" {
        port = "8083"
    }

    log.Printf("Order service starting on port %s", port)
    if err := http.ListenAndServe(":"+port, router); err != nil {
        log.Fatal(err)
    }
}

Docker Compose Setup

version: '3.8'

services:
  user-service:
    build: ./user-service
    ports:
      - "8081:8081"
    environment:
      - DATABASE_URL=postgres://user:pass@user-db:5432/users?sslmode=disable
      - PORT=8081
    depends_on:
      - user-db

  product-service:
    build: ./product-service
    ports:
      - "8082:8082"
    environment:
      - DATABASE_URL=postgres://user:pass@product-db:5432/products?sslmode=disable
      - PORT=8082
    depends_on:
      - product-db

  order-service:
    build: ./order-service
    ports:
      - "8083:8083"
    environment:
      - DATABASE_URL=postgres://user:pass@order-db:5432/orders?sslmode=disable
      - USER_SERVICE_URL=http://user-service:8081
      - PRODUCT_SERVICE_URL=http://product-service:8082
      - PORT=8083
    depends_on:
      - order-db
      - user-service
      - product-service

  user-db:
    image: postgres:15
    environment:
      - POSTGRES_USER=user
      - POSTGRES_PASSWORD=pass
      - POSTGRES_DB=users

  product-db:
    image: postgres:15
    environment:
      - POSTGRES_USER=user
      - POSTGRES_PASSWORD=pass
      - POSTGRES_DB=products

  order-db:
    image: postgres:15
    environment:
      - POSTGRES_USER=user
      - POSTGRES_PASSWORD=pass
      - POSTGRES_DB=orders

Best Practices

Service Boundaries: Define clear service boundaries based on business capabilities
API Contracts: Use API versioning and maintain backward compatibility
Service Discovery: Implement service registry for dynamic service location
Circuit Breakers: Prevent cascading failures with circuit breaker pattern
Distributed Tracing: Implement tracing to debug cross-service calls
Health Checks: Provide health endpoints for monitoring
Configuration Management: Externalize configuration
Security: Implement service-to-service authentication

Common Pitfalls

Distributed Monolith: Services too tightly coupled, defeating the purpose
Chatty Services: Too many synchronous calls between services
Shared Database: Multiple services accessing the same database
Ignoring Network Failures: Not handling network errors gracefully
No Service Versioning: Breaking changes without versioning
Data Consistency Issues: Not handling eventual consistency
Over-Engineering: Creating too many small services

When to Use Microservices Architecture

Use When:

Application is large and complex with multiple domains
Different services need independent scaling
Teams are distributed and need autonomy
Different services require different technologies
Need to deploy services independently
Organization can handle distributed systems complexity

Avoid When:

Starting a new project with unclear requirements
Team lacks distributed systems expertise
Application is simple and doesn’t need scaling
Organization can’t support the operational overhead
Real-time consistency is critical across all operations

Advantages

Independent Deployment: Deploy services without affecting others
Technology Flexibility: Use different technologies per service
Scalability: Scale individual services based on demand
Team Autonomy: Teams can work independently on services
Fault Isolation: Failures contained to individual services
Easier Testing: Test services in isolation
Better Resource Utilization: Optimize resources per service

Disadvantages

Increased Complexity: Distributed systems are inherently complex
Network Overhead: Inter-service communication adds latency
Data Consistency: Eventual consistency is harder to reason about
Operational Overhead: More services to deploy and monitor
Debugging Challenges: Harder to trace issues across services
Testing Complexity: Integration testing is more difficult
Deployment Complexity: Need orchestration tools like Kubernetes

Microservices Architecture provides powerful benefits for large, complex applications but comes with significant operational complexity. Choose wisely based on your organization’s needs and capabilities.

Go Architecture Patterns Series: ← Previous: Modular Monolith | Series Overview | Next: Event-Driven Architecture →

What is Microservices Architecture?#

Architecture Overview#

Service Communication Patterns#

Real-World Use Cases#

Microservices Implementation#

Project Structure (Multi-Repository)#

Service 1: User Service#

Service 2: Product Service#

Service 3: Order Service (Orchestrator)#

Docker Compose Setup#

Best Practices#

Common Pitfalls#

When to Use Microservices Architecture#

Advantages#

Disadvantages#