Golang テクノロジーを使用してフォールトトレラントな分散システムを実装するにはどうすればよいですか?

import (
    "context"
    "fmt"
    "log"
    "sync"

    "github.com/go-playground/validator/v10"
    "github.com/grpc-ecosystem/go-grpc-middleware/retry"
    "google.golang.org/grpc"
)

type Order struct {
    ID          string `json:"id" validate:"required"`
    Description string `json:"description" validate:"required"`
    Price       float64 `json:"price" validate:"required"`
}

// OrderService defines the interface for the order service
type OrderService interface {
    CreateOrder(ctx context.Context, order *Order) (*Order, error)
}

// OrderServiceClient is a gRPC client for the OrderService
type OrderServiceClient struct {
    client OrderService
    mtx    sync.Mutex
}

// NewOrderServiceClient returns a new OrderServiceClient
func NewOrderServiceClient(addr string) (*OrderServiceClient, error) {
    conn, err := grpc.Dial(addr, grpc.WithUnaryInterceptor(grpc_retry.UnaryClientInterceptor()))
    if err != nil {
        log.Fatalf("failed to connect to order service: %v", err)
    }

    serviceClient := OrderServiceClient{
        client: NewOrderServiceClient(conn),
    }

    return &serviceClient, nil
}

// CreateOrder creates an order
func (c *OrderServiceClient) CreateOrder(ctx context.Context, order *Order) (*Order, error) {
    c.mtx.Lock()
    defer c.mtx.Unlock()

    // Validate the order
    if err := validate.New().Struct(order); err != nil {
        return nil, fmt.Errorf("invalid order: %v", err)
    }

    // Create the order with automatic retry
    return c.client.CreateOrder(ctx, order)
}