c# - App with identity crashes at startup on Ubuntu server 20.04LTS

Question

I have An application crash while deploying my MVC web application on the server. It works fine on my local visual studio but crashes when started on my Ubuntu 20.04 LTS.

The error is that it doesn't start while it was starting before I added the Identity module ... sudo systemctl stop myapp.service

● myapp .service - myapp app
 Loaded: loaded (/etc/systemd/system/myapp .service; enabled; vendor preset: enabled)
 Active: activating (auto-restart) (Result: exit-code) since Mon 2021-01-11 11:54:21 UTC; 4s ago
Process: 17943 ExecStart=/usr/bin/dotnet /var/www/myapp .be/net5.0/myapp .be.dll (code=exited, status=1/FAILURE)

Main PID: 17943 (code=exited, status=1/FAILURE)

I suspect Identity manager to crash. While it works fine when on hosted on my visual studio windows dev environment The most annoying its that it doesn't crashes it's not even launching showing no error...

My startup.cs file.

using mysite.com.Data;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.HttpOverrides;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Identity.UI;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.AspNetCore.Authentication;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Authentication.OAuth;

namespace mysite.com
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddAuthentication()
                .AddGoogle(options =>
                {
                    //clean this latter know how to implement user secrets.json
                    options.ClientId = "xxxxxx.apps.googleusercontent.com";
                    options.ClientSecret = "xxxxxx";
                })
                .AddFacebook(facebookOptions =>
                {
                    facebookOptions.AppId = Configuration["Authentication:Facebook:AppId"];
                    facebookOptions.AppSecret = Configuration["Authentication:Facebook:AppSecret"];
                })
                ;
            string mySqlConnectionStr = Configuration.GetConnectionString("DefaultConnection");
 
            services.AddDbContextPool<ApplicationDbContext>(options => options.UseMySql(mySqlConnectionStr, ServerVersion.AutoDetect(mySqlConnectionStr)));
            services.AddControllers();
        services.AddDatabaseDeveloperPageExceptionFilter();

            services.AddDefaultIdentity<IdentityUser>(options => options.SignIn.RequireConfirmedAccount = true)
                .AddEntityFrameworkStores<ApplicationDbContext>();
            services.AddControllersWithViews();


        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            app.UseForwardedHeaders(new ForwardedHeadersOptions
            {
                ForwardedHeaders = ForwardedHeaders.XForwardedFor | ForwardedHeaders.XForwardedProto
            });

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseMigrationsEndPoint();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
                app.UseHsts();
            }
            app.UseHttpsRedirection();
            app.UseStaticFiles();

            app.UseRouting();

            app.UseAuthentication();
            app.UseAuthorization();

            app.UseEndpoints(endpoints =>
            {
                endpoints.MapControllerRoute(
                    name: "default",
                    pattern: "{controller=Home}/{action=Index}/{id?}");
                endpoints.MapRazorPages();
            });

 
        }
    }
}

Update 1: Still investigating but I from what I saw on github Etc... Identity might be broken on Linux... So I switched to Windows server and everything works ...

Answer 1

You can run your project with the command below in the terminal

dotnet run

if your project is published, you can use the command below in the terminal

dotnet YourProject.dll

I think you can use Nginx reverse proxy for your .net core project in Linux server

server {
    listen        80;
    server_name   example.com *.example.com;
    location / {
        proxy_pass         http://localhost:5000;
        proxy_http_version 1.1;
        proxy_set_header   Upgrade $http_upgrade;
        proxy_set_header   Connection keep-alive;
        proxy_set_header   Host $host;
        proxy_cache_bypass $http_upgrade;
        proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header   X-Forwarded-Proto $scheme;
    }
}

for more information about Host ASP.NET Core on Linux with Nginx: https://docs.microsoft.com/en-us/aspnet/core/host-and-deploy/linux-nginx?view=aspnetcore-5.0#configure-nginx