Golang 마이크로서비스 개발을 통해 어떤 핵심 문제를 해결할 수 있나요?

package main

import (
    "fmt"
    "net/http"
)

func handler(w http.ResponseWriter, r *http.Request) {
    fmt.Fprintf(w, "Hello, World!")
}

func main() {
    http.HandleFunc("/", handler)
    http.ListenAndServe(":8080", nil)
}

package main

import (
    "fmt"
    "net/http"
    "os"
    "os/signal"
    "syscall"
    "time"
)

func main() {
    srv := &http.Server{
        Addr: "localhost:8080",
        Handler: http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
            fmt.Fprintf(w, "Hello, World!")
        }),
    }

    go func() {
        if err := srv.ListenAndServe(); err != nil {
            fmt.Println(err)
        }
    }()

    c := make(chan os.Signal, 1)
    signal.Notify(c, syscall.SIGINT, syscall.SIGTERM)
    <-c

    ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
    defer cancel()
    srv.Shutdown(ctx)

    fmt.Println("Server gracefully stopped.")
}

package main

import (
    "fmt"
    "net/http"

    "github.com/hashicorp/consul/api"
)

func main() {
    config := api.DefaultConfig()
    client, err := api.NewClient(config)
    if err != nil {
        fmt.Println(err)
        return
    }

    services, _, err := client.Catalog().Service("my-service", "", nil)
    if err != nil {
        fmt.Println(err)
        return
    }

    if len(services) == 0 {
        fmt.Println("No services found.")
        return
    }

    for _, service := range services {
        fmt.Println(service.Address, service.ServicePort)
    }

    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        // 发送请求到服务
    })
    http.ListenAndServe(":8080", nil)
}