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When building cloud-native applications using the Golang microservices framework, the preferred frameworks include: gRPC: suitable for RPC-based microservices, mature and efficient. Go kit: A lightweight framework that provides a modular toolset for building microservices.
Building cloud-native applications using the Golang microservices framework
When building modern cloud-native applications, microservices architecture has become mainstream. This article walks you through building and deploying a simple cloud-native application using the popular Golang microservices framework.
Choose a Microservices Framework
There are several microservices frameworks available for Golang, but the two most popular are:
Set up Golang project
Install Golang and initialize a new project using the following command:
go mod init myapp
Add required dependencies:
go get github.com/grpc-ecosystem/go-grpc-middleware/v2/interceptors/logging
Build microservices
Using gRPC :
import google.golang.org/protobuf/proto import google.golang.org/grpc import google.golang.org/grpc/codes import google.golang.org/grpc/status // 定义服务 type GreeterService struct{} func (s *GreeterService) SayHello(context.Context, *HelloRequest) (*HelloReply, error) { return &HelloReply{Message: "Hello, " + request.GetName()}, nil } func main() { // 创建 gRPC 服务器 server := grpc.NewServer(grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer( grpc_middleware.WithUnaryServerChainCode( func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) { fmt.Printf("Received request for %s", info.FullMethod) return handler(ctx, req) }, ), grpc_middleware.WithUnaryServerChainCode( func(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (resp interface{}, err error) { resp, err = handler(ctx, req) if err != nil { code := status.Code(err) if code == codes.Unknown || code == codes.Internal { err = status.Error(500, err.Error()) } } return }, ), ))) // 注册服务 RegisterGreeterServiceServer(server, &GreeterService{}) }
Using Go kit:
import github.com/go-kit/kit/endpoint import github.com/go-kit/kit/transport/http import github.com/gorilla/mux import net/http // 定义服务端点 var sayHelloEndpoint = MakeSayHelloEndpoint(svc) // 定义 HTTP 处理程序 func SayHelloHandler(w http.ResponseWriter, r *http.Request) { var request HelloRequest if err := json.NewDecoder(r.Body).Decode(&request); err != nil { http.Error(w, err.Error(), http.StatusBadRequest) return } response, err := sayHelloEndpoint(context.Background(), request) if err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } w.Header().Set("Content-Type", "application/json") if err := json.NewEncoder(w).Encode(response); err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } } func main() { r := mux.NewRouter() r.Handle("/hello", http.NewServer(sayHelloEndpoint, decodeSayHelloRequest, encodeSayHelloResponse)) srv := http.Server{ Addr: ":8080", Handler: r, } srv.ListenAndServe() }
Practical case
Create a simple microservice that provides a "Hello" API that can be accessed via HTTP or gRPC.
Deploy to a cloud platform
Use a containerization tool (such as Docker) to containerize the application and deploy it to a cloud platform (such as Kubernetes).
Conclusion
With this article, you should understand how to build and deploy cloud-native applications using the Golang microservices framework.
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