Simple Webserver running in background

• Install go. Follow the instructions from: https://go.dev/doc/install

• Make the bash script executable

chmod +x startBackground.sh

• Run the bash script to start the service in background.

bash startBackground.sh

Test by running following HTTP cURL requests:

curl -X GET "http://127.0.0.1:12345/api/v1/ping"

curl -X POST "http://127.0.0.1:12345/api/v1/datetime"

Simple Webserver running as daemon

• Create a daemon service file in the /etc/systemd/system folder.

You can either create a file using editor like nano, and then write the contents there:

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

# Now write/copy the contents from simplewebserver.service file in the root of this repository.

OR, copy the file directly there:

sudo cp simplewebserver.service /etc/systemd/system/simplewebserver.service

• Ensure that the webserver binary is built

go build -o SimpleWebserver

• Ensure that the binary is executable

chmod +x SimpleWebserver

• Start the daemon service

sudo systemctl start simplewebserver

• Check the status of the daemon service

sudo systemctl status simplewebserver

• Stop the daemon service

sudo systemctl stop simplewebserver

• Restart the daemon service

sudo systemctl restart simplewebserver

• Enable the daemon for Simple Webserver, so that it gets started on OS reboot

sudo systemctl enable simplewebserver

• Disable the daemon service, so that it does not get started on reboot

sudo systemctl disable simplewebserver

• In case of any errors, you can debug by checking the logs

sudo journalctl -u simplewebserver # OR, sudo journalctl --unit=simplewebserver

# Or, if you want to tail the log, then use
sudo journalctl -u simplewebserver -f

• Whenever we manually edit the service file using nano/vim, etc, then we need to ensure the daemon is reload and service is restarted.

sudo systemctl daemon-reload

sudo systemctl restart simplewebserver

• To edit the service file, without needing a daemon-reload:

sudo systemctl edit simplewebserver --full

• Get a complete list of systemd service configuration parameters

man systemd.service

OR, visit: https://man7.org/linux/man-pages/man5/systemd.service.5.html