如何在Nginx服务器中将ASP.NET Core Web API dll文件作为服务运行？

Question

I have an AWS EC2 instance running on Ubuntu 16.04 server. I am running an ASP.NET Core Web API server in this instance.

I have followed this link to host ASP.NET Core on Linux with Nginx . I have followed the tutorial until the Monitoring the app section. Now, i have run the web api dll file using below command and it is listening at http://localhost:5000

dotnet MyWebAPI.dll

I have run this above command by connecting with the EC2 instance using PuTTY . As i have set up the reverse proxy server, so i can hit my endpoint nicely using postman.

But, when i close the PuTTY session, the dll file is not running anymore. As a result, i could not hit the endpoint.

So, what should i do to keep the dll file running on localhost as a service so that it does not stop when i close the PuTTY session?

Answer 1

I could run my application as a service inside the Nginx server. Now, if i close the PuTTY session , the service is still running. I have used systemd to create a service file to start and monitor the underlying web app.

systemd is an init system that provides many powerful features for starting, stopping, and managing processes.

At first, i have created a service file for my web application

sudo nano /etc/systemd/system/my-web-api.service

Then, inside that my-web-api.service file, i have included below configurations:

[Unit] 
Description=My first .NET Core application on Ubuntu 

[Service] 
WorkingDirectory=/home/ubuntu/MyWebAPI 
ExecStart=/usr/bin/dotnet /home/ubuntu/MyWebAPI/MyWebAPI.dll 
Restart=always 
RestartSec=10 # Restart service after 10 seconds if dotnet service crashes 
SyslogIdentifier=offershare-web-app
Environment=ASPNETCORE_ENVIRONMENT=Production 

[Install] 
WantedBy=multi-user.target

Then, i need to enable the service and run it.

sudo systemctl enable my-web-api.service
sudo systemctl start my-web-api.service
sudo systemctl status my-web-api.service

Now, the status command should show the service as running if the configuration is correct. Now, my web application is running, kestrel by default listens on port 5000 , so my application is available on http://localhost:5000 .

Now, if i close the PuTTY session, my web api is still running.

Answer 2

Posting on behalf of @Brudex (this was edited into the question, instead of being posted as an answer - happy to delete this copy if original author posts this him/her-self correctly as an answer)

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You have to use a process manager like supervisor to keep the asp.net file running. Use nginx as a reverse proxy to forward request to your asp.net core application.

Follow to install and setup supervisor to manage ur asp.net apps

1. sudo apt-get install supervisor

2. create a supervisor config like follows

    [program:hellomvc] command=/usr/bin/dotnet /var/aspnetcore/HelloMVC/HelloMVC.dll directory=/var/aspnetcore/HelloMVC/ autostart=true autorestart=true stderr_logfile=/var/log/hellomvc.err.log stdout_logfile=/var/log/hellomvc.out.log environment=HOME=/var/www/,ASPNETCORE_ENVIRONMENT=Production user=www-data stopsignal=INT stopasgroup=true killasgroup=true 

3. Start supervisor with

    sudo service supervisor start 

You can find more information from:
https://docs.microsoft.com/en-us/aspnet/core/host-and-deploy/linux-nginx