Very simple file upload and download ASP.NET Core application.

Developer notes

Some notes to make development, build and publish easier. Greate source of knowledge is at Microsoft Docs.

Publish to Raspberry

dotnet publish -c Release -r linux-arm

Make ASP.NET Core application a service on Raspberry linux

Create a file at /lib/systemd/system/{service_name}.service (the extension '.service' is required) and paste a content:

[Unit]
Description={description} ASP.NET CORE app
After=multi-user.target

[Service]
Type=simple
WorkingDirectory=/wwwroot/{path_to_directory}
ExecStart=/wwwroot/{path_to_directory}/{executable_name} --server.urls "http://*:{kestrel_port}"
Restart=on-abort

[Install]
WantedBy=multi-user.target

Than enable the new service and start it:

systemctl enable {service_name}

systemctl start {service_name}

After every publish and copy to server, you need to make executable executable:

chmod +x {path_to_executable}

Show linux service logs

sudo journalctl -fu {service_name}.service

or

sudo journalctl -fu {service_name}.service --since "2016-10-18" --until "2016-10-18 04:00"

Register an Nginx website as a proxy for ASP.NET Core application

Create a file in /etc/nginx/sites-available/{website_name} and paste a content:

server {
    listen       80;
    server_name  {domain1} {domain...};

    location / {
        proxy_pass  http://127.0.0.1:{kestrel_port};
    }
}

Note: Sometimes it may be important to use 127.0.0.1 instead of localhost.

Note: If you need web sockets (SignalR etc), see nginx documentation.

Redirect 502 gateway error to some update-like page:

error_page 502 /update.html;

location = /update.html {
    internal;
    root  /{path_to_directory_with_update.html};
}

To make website enabled, create a symbolic link in sites-enabled:

ln -s /etc/nginx/sites-available/{website_name} /etc/nginx/sites-enabled/{website_name}

and than restart/reload Nginx.

nginx -s reload

Access log

Monitor Nginx

In website definition add:

server {
    access_log /var/log/nginx/access_log combined;
    ...
}

Then use:

tail -f /var/log/nginx/access_log

OR install utility ngxtop and use:

ngxtop -f /var/log/nginx/access_log

SSL using Let's Encrypt

https://certbot.eff.org/lets-encrypt/pip-nginx