A brief analysis of how to use Golang to build local services and deploy them

About golang local deployment service

With the continuous development of Internet technology, the demand for high-concurrency and high-traffic services is also increasing. Golang is an emerging server-side programming language. It has the characteristics of high efficiency, high concurrency, easy development, and rapid iteration. It has gradually become the preferred language for Internet enterprises to develop services. In this article, we will introduce how to use Golang to build and deploy local services.

Step one: Install the Golang environment

First, we need to install the Golang development environment. You can download the corresponding installation package from the official website (https://golang.org/dl/), or use the command line to install:

wget https://golang.google.cn/dl/go1.16.4.linux-amd64.tar.gz
tar -xzvf go1.16.4.linux-amd64.tar.gz

Next, move the decompressed folder to the location you want to install Directory. Then, we need to configure Golang environment variables, which can be done by modifying configuration files such as .bashrc or .bash_profile (.bashrc file under Ubuntu system).

export PATH=$PATH:/usr/local/go/bin
export GOPATH=$HOME/go
export PATH=$PATH:$GOPATH/bin

After configuring the environment variables, use the following command to verify whether the installation is successful:

go version

If the version number is output, it means that Golang is installed successfully!

Step 2: Write Golang service

We will write a simple Golang service and listen to port 8080. Use the following command in the command line to create a new project:

mkdir go-service
cd go-service
go mod init example.com/go-service

Then, create the main.go file under the go-service folder and edit the following code:

package main

import (
    "fmt"
    "net/http"
)

func main() {
    http.HandleFunc("/", handler)
    fmt.Println("Starting server at http://localhost:8080")
    http.ListenAndServe(":8080", nil)
}

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

Save and exit the file, run the following command to start the web service:

go run main.go

Now, we can enter http://localhost:8080 in the browser to access the service and see the "Hello, World!" output.

Step Three: Deploy using Golang

Services that have successfully run locally can be deployed. If you need to deploy the service on a computer or server, you need to compile the code first and run The following command:

go build main.go

After successful compilation, an executable file named main will be generated. Execute the following command (running in the background by default) to start the service on the server:

./main &

Use the following command to check whether the process is started:

ps -ef | grep main

Enter the IP address of the server in the browser to access it service and see the output of "Hello, World!"

Summary

Through the above steps, we have completed the process of Golang local service deployment. To put it simply, it means installing the Golang environment, writing Golang services, and using Golang for deployment. As an emerging programming language, Golang has the advantages of high efficiency, high concurrency, and ease of development, and is increasingly favored by Internet companies. This article introduces the process of deploying local services. For users who need to deploy services to the server, they need to first compile the code into an executable file and then run it on the server.

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