How to deploy Go applications in CentOS system

With the development of the Internet and people's increasing demand for dynamics and high performance, the Go language is gradually favored by more and more developers because of its efficiency, simplicity, security and other features. In development, how to deploy is also a very important part. This article will introduce how to deploy Go language applications in CentOS systems.

1. Install the Go environment

First, you need to install the Go environment on the server. You can download the go version suitable for your system from the official website (https://golang.google.cn/dl/) and install it.

wget https://golang.google.cn/dl/go1.16.5.linux-amd64.tar.gz
tar -C /usr/local -zxvf go1.16.5.linux-amd64. tar.gz

2. Configure environment variables

After the installation is complete, you need to configure the system environment variables to use Go globally.

Add the /etc/profile.d/go.sh file and write the following content:

export GOROOT=/usr/local/go # Go installation address
export GOPATH =$HOME/go #GOPATH You can specify
export PATH=$GOROOT/bin:$PATH

according to your own needs and then make it effective.

source /etc/profile.d/go.sh

Execute the go version command to check the version number. If the go version information is output, the installation is successful.

3. Deploying the application

Next, we can start deploying the application.

3.1 Compile the go program

Use the go build command to compile the application.

go build main.go

Among them, main.go is the entry file of the program you want to compile, which can be modified according to your own needs.

3.2 Use systemd to start automatically at boot

For the management of system services, using systemd is a good choice. We can register the go program as a service through systemd, and then implement automatic startup at boot.

3.2.1 Write unit file

In the /etc/systemd/system/ directory, create a new service file named myapp.service and fill in the following content:

[Unit]
Description="my app description"
After=syslog.target

[Service]
Type=simple
User=root
WorkingDirectory=/root /
ExecStart=/root/myapp
Restart=on-failure
RestartSec=5s

[Install]
WantedBy=multi-user.target

where , myapp.service is the name of the service you want to register, the ExecStart item fills in the compiled executable file path, and Restart is the restart option.

3.2.2 Load and start the service

Execute the following systemctl command to load the service file and start the service.

systemctl daemon-reload # Reload the systemd configuration
systemctl start myapp.service # Start the myapp.service service
systemctl status myapp.service # Check the service status and confirm whether it is running

3.2.3 Set auto-start at boot

Use the enable command to set auto-start at boot.

systemctl enable myapp.service

In this way, myapp.service will start automatically after restarting the server next time.

4. Summary

The above are the steps for deploying Go language applications in CentOS systems. Overall, the whole process is very simple.

First install the Go environment, then write the application, use systemd to register as a service and set it to start automatically at boot, and finally restart the server.

The Go language has the characteristics of efficiency, simplicity, and security. It is a language that is very suitable for use in fields such as Web development, data processing, and network programming. In future development, we can also use similar methods to deploy Go programs to the server for use.

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