How to deploy and guard golang applications using systemd

Updated: October 23, 2023 14:55:49 Submission: mrr

systemd is a popular daemon manager that can easily manage the start, stop, restart and other operations of the service, so that our applications always stay online, this article describes how to use systemd to deploy and guard golang applications, interested friends take a look at it

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In the age of cloud computing, rapid deployment allows developers to deliver products quickly and respond quickly to user needs. golang has become an indispensable programming language in the cloud computing space in recent years, combining fast compilation and efficient concurrency. But what if the application crashes? To keep the application running continuously, we need to use daemons to monitor and restart the application. This article describes how to use systemd to deploy and guard golang applications.

Install and configure systemd

systemd is one of the most popular initialization and daemon management systems available today. It is responsible for starting system services and daemons, as well as monitoring their status and restarting them if necessary. Before you can use systemd, you must install it.

Install systemd with the following command:

$ sudo apt-get update
$ sudo apt-get install -y systemd

2. Create service files

Before creating the daemon, we need to create a systemd service file. A service file is a text file that contains information describing a service. The location of the service file is in the /etc/systemd/system/ directory. For example, let's create a service file called golang-demo.service:

$ sudo touch /etc/systemd/system/golang-demo.service

Edit the golang-demo.service file:

$ sudo nano /etc/systemd/system/golang-demo.service

Add the following to the file:

[Unit]
Description=My golang app
After=network.target
[Service]
Type=simple
User=ubuntu
Group=ubuntu
ExecStart=/usr/local/bin/golang-demo
[Install]
WantedBy=multi-user.target

Among them,

[Unit]The section contains the service name and description, and when the service should start (innetwork.targetAfter).
[Service]The section describes the details of starting the service, including the users used, groups, and the location of the startup script file.
[Install]The section specifies the target on which systemd should start the service.

Create the golang application

Next, we need to create a golang application called Golang-demo. In terminal, clone a simple go application using the following git command:

$ git clone https://github.com/shalar/golang-demo.git

Go to the project directory and build and compile the application:

$ cd golang-demo
$ go build

We need to move the generated binary golang-demo to the /usr/local/bin directory.

$ sudo mv golang-demo /usr/local/bin/

4. Start the service and test it

Now we are ready to start the service and test it. Use the command to start the service:

$ sudo systemctl start golang-demo.service

To view the status of the service:

$ sudo systemctl status golang-demo.service

If you see active (running), which means the service is running, you can go to http://localhost:8080 with your browser and you should see the output.

Five, boot from the start

As mentioned earlier, in the [Install] section, we specify which target systemd should start the service on. Now, we can use the following command to start up:

$ sudo systemctl enable golang-demo.service

Now, the system automatically starts the service every time it starts.

Vi. Conclusion

This article showed you how to deploy and guard golang applications using systemd. systemd is a popular daemon manager that makes it easy to manage the start, stop, restart of services, etc., to keep our applications always online.

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