Explain how to deploy Golang services

Golang is a widely used programming language that is popular for its object-oriented, efficient performance and easy deployment. In this article, we will explain how to deploy Golang services.

1. Environment configuration

To deploy Golang service, we first need to install and configure the Golang environment. The official Golang website provides installation packages for Windows, MacOS, Linux and other operating systems. For Linux environments, most distributions have built-in or provided Golang package management tools. After the installation is complete, we need to configure the environment variables and add the Golang executable file to the PATH environment variable.

2. Write code

After completing the environment configuration, we need to write Golang code. In Golang, you can use standard libraries or third-party libraries to implement different functions. In this article, we take a simple HTTP service as an example, using the net/http package of the Golang standard library to handle requests and return a simple "Hello World" string as a response.

package main

import (
    "fmt"
    "net/http"
)

func main() {
    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprint(w, "Hello World")
    })

    if err := http.ListenAndServe(":8080", nil); err != nil {
        panic(err)
    }
}

3. Compile the code

After completing the code writing, we need to compile it into an executable file to deploy to the server. Golang comes with its own compilation tool go build, which can compile the code into an executable file. Execute the following command in the terminal to compile the code:

go build -o app main.go

where "app" is the executable file we want to get name, main.go is the name of the code file we wrote.

4. Deployment service

After completing the compilation of the code, we can deploy the executable file to the server. The simplest way is to use the scp command to upload the executable file to the server, and then run the file on the server. Execute the following command in the terminal to upload the executable file to the server:

scp app user@server:/path/to/app

where, " user" is the username on the server, "server" is the IP address or domain name of the server, and "/path/to/app" is the destination path to which we wish to upload the file.

Execute the following command on the server to start the Golang service:

./app

5. Use the system service management tool

If we want the Golang service to run automatically when the server starts, or to automatically restart when the service crashes, we can use the system service management tool to manage the Golang service. Different operating systems may use different tools. Here we take systemd as an example to introduce how to configure and manage Golang services.

First, we need to create a systemd service configuration file. Execute the following command in the terminal to create a service configuration file named "golang.service":

sudo nano /etc/systemd/system/golang.service

Add the following content to the file:

[Unit]
Description=Golang Service
After=network.target

[Service]
User=user
ExecStart=/path/to/app
Restart=always

[Install]
WantedBy=multi-user.target

where "user" is the user name on the server, and "/path/to/app" is the path to the Golang executable file we uploaded to the server.

After completing the above configuration, run the following command to start the service:

sudo systemctl start golang

Execute the following command to view the service status:

sudo systemctl status golang

Execute the following command to stop the service:

sudo systemctl stop golang

Execute the following The command can restart the service:

sudo systemctl restart golang

Through the above steps, we have completed the deployment and management of the Golang service and let our application run on the server run efficiently and stably.

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