Set up golang daemon

When developing and deploying Go applications, we often need to configure them as daemon processes so that they can run in the background and start automatically when the system starts. This article will explain how to set up a Go application as a daemon so that you can easily control and manage your application.

1. Using systemd

systemd is a daemon system and system manager that can be used to manage and monitor system processes in Linux systems. After installing systemd and configuring your Go application as a Systemd service, you can use the systemctl command to start, stop, and reload your service.

Here are the simple steps on how to configure a Go application as a Systemd service:

1. Create the systemd service file

Use your favorite text editor Create a new file in your browser and copy and paste the following into the file:

[Unit]
Description=My Go Service
After=network.target

[Service]
User=
Group=
ExecStart=
Restart=always

[Install]
WantedBy=multi-user.target

Please note to replace the following parameters:

• Description: Description of the service.
• User: The user to run the application.
• Group: The group to which the user of the application belongs.
• ExecStart: The absolute path of the Go application.
• Restart: Automatically restart the service after it is stopped.

2. Save the file as a .service file

Save the file as "mygo.service" and place it in the "/etc/systemd/system" directory. This will enable Systemd to load the service file on startup.

3. Reload Systemd

Run the following command to reload Systemd and make it aware of the new service file:

sudo systemctl daemon-reload

4. Start the service

Run the following command to start the service:

sudo systemctl start mygo.service

5.Check the service status

Run the following command To check if your service is running:

sudo systemctl status mygo.service

If the status is "running", it means the service is running.

2. Using supervisor

Supervisor is an application that manages and monitors processes on Unix systems. It can easily manage your Go applications and also supports features such as automatic restart and logging output.

Here are the steps on how to set up Supervisor to guard Go applications on Ubuntu:

1. Install Supervisor

sudo apt-get install supervisor

2. Create Supervisor Configuration

Use your favorite text editor to create a new file and copy and paste the following content into the file:

[program:mygo]
command=/usr/bin/go run /path/to/your/go/app
user=
autostart=true
autorestart=true
stderr_logfile=/var/log /mygo.err.log
stdout_logfile=/var/log/mygo.out.log

Please note to replace the following parameters:

• program: The name of the Supervisor program.
• command: The absolute path to the Go application.
• user: The user to run the application.
• stderr_logfile: The file path for recording error logs.
• stdout_logfile: The file path for recording standard output logs.

3. Save the file as a .conf file

Save the file as "mygo.conf" and place it in the "/etc/supervisor/conf.d" directory middle.

4. Reload Supervisor

Run the following command to reload Supervisor and make it aware of the new supervisor service file:

sudo supervisorctl reread

5. Start the service

Run the following command to start the service:

sudo supervisorctl start mygo

6. Check the service status

Run the following command to check your Whether the service is running:

sudo supervisorctl status mygo

If the status is "running", it means the service is running.

Summary

Whether you choose to use systemd or Supervisor, they are powerful tools for managing and monitoring Linux processes. Configuring Go applications as daemons using these tools helps you conveniently control and manage your applications and ensure that they start automatically at system startup.

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