Adding a Linux Service

Creating Service

Open a new service file in a text editor.

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

Sample contents of the file:

    [Unit]

    Description=Candle Test / Demo Server Built from Develop Branch

    [Service]

    WorkingDirectory=/var/aspnetcore/candle.cloud

    ExecStart=/var/aspnetcore/candle.cloud/Candle.WebApp --listen-url=http://192.168.0.24:5000

    Restart=always

    RestartSec=10  # Restart service after 10 seconds if dotnet service crashes

    SyslogIdentifier=candle-cloud

    User=www-data

    Environment=ASPNETCORE_ENVIRONMENT=Production

    Environment=DOTNET_PRINT_TELEMETRY_MESSAGE=false

    [Install]

    WantedBy=multi-user.target

Save the file and then enable the services.

    sudo systemctl enable candle.service

Start the service and verify that it's running:

    sudo systemctl start candle.service

    sudo systemctl status candle.service

Viewing logs

Since the web app using Kestrel is managed using `systemd`, all events and processes are logged to a centralized journal. However, this journal includes all entries for all services and processes managed by `systemd`. To view the `candle.service`-specific items, use the following command:

    sudo journalctl -fu candle.service

For further filtering, time options such as `--since today`, `--until 1 hour ago` or a combination of these can reduce the amount of entries returned.

    sudo journalctl -fu candle.service --since "2018-5-18" --until "2018-5-30 04:00"