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Create a Systemd Service

Create .service File​

  • Set "User" and "Group"
  • Set executable's path to "ExecStart"
  • Change your executable's ownership to "User" and "Group" you set.
sudo vi /etc/systemd/system/servicename.service

[Unit]  
Description=Service Name Description  
Wants=network-online.target  
After=network-online.target

[Service]  
User=user  
Group=group  
Type=simple  
ExecStart=exec-path

[Install]  
WantedBy=multi-user.target

Service Actions​

Start/Stop/Restart​

systemctl start/stop/restart servicename

Automatically start on boot​

systemctl enable servicename

Directives​

After​

"After" directive means that your service must be started after the given-keyword is ready. [1]

After= ensures that the listed unit is fully started up before the configured unit is started. [1]

Restart​

By default, systemd does not restart your service if the program exits for whatever reason

Restart=always  
Restart=on-failure

You could also use on-failure to only restart if the exit status is not 0.

By default, systemd attempts a restart after 100ms. You can specify the number of seconds to wait before attempting a restart, using:

RestartSec=1

By default, when you configure Restart=always as we did, systemd gives up restarting your service if it fails to start more than 5 times within a 10 seconds interval. Forever.

If you set it to restart after 3 seconds, then you can never reach 5 failed retries within 10 seconds.

The simple fix that always works is to set StartLimitIntervalSec=0. This way, systemd will attempt to restart your service forever. [2]

Source​

Unknown (2023-09-13 14:01:18)
#linux #systemd