c# - 将 ASP.NET Core 5.0 部署到 Ubuntu 20.04，出现 500 服务器错误和白屏

Question

我正在尝试在 Ubuntu 20.04 服务器上运行 ASP.Net Core 5.0，并且在一切运行后我得到一个白屏。 FireFox 中的网络选项卡给出 HTTP/1.1 500 Internal Server Error ，所以我在过去两周一直在互联网上搜索，试图在来到 SO 之前解决这个问题。
这是我现在如何配置所有内容的方式。
我创建了一个 Ubuntu 20.04 LTS x64 digital ocean 上的液滴并安装Nginx .
Here是我安装 Nginx 并让它运行的步骤。
安装了所有需要的 Microsoft 软件包，例如 SDK and Runtime
一切都启动并运行，我可以看到正常的 Nginx 欢迎屏幕。创建了一个服务器 block 并添加了一个 Index.html 文件，并且也可以看到它。
然后我创建了一个这样的目录sudo mkdir -p /var/www/myDomainName也给我自己所需的权限
将我的仓库从 GitHub 克隆到新创建的 dir其中有需要的Forwarding Headers如 Microsoft 文档中所述，对 startup.cs 的中间件进行了更改。
我运行 dotnet build命令并获得以下信息。

/var/www/myDomain/src/Presentation/CTA.Web$ dotnet build
Microsoft (R) Build Engine version 16.11.2+f32259642 for .NET
Copyright (C) Microsoft Corporation. All rights reserved.

Determining projects to restore...
All projects are up-to-date for restore.
CTA.Web -> /var/www/myDomain/src/Presentation/CTA.Web/bin/Debug/net5.0/CTA.Web.dll
CTA.Web -> /var/www/myDomain/src/Presentation/CTA.Web/bin/Debug/net5.0/CTA.Web.Views.dll

Build succeeded.
  0 Warning(s)
  0 Error(s)

Time Elapsed 00:00:02.25

然后我运行 dotnet publish命令并获得以下信息

/var/www/myDomain/src/Presentation/CTA.Web$ dotnet publish
Microsoft (R) Build Engine version 16.11.2+f32259642 for .NET
Copyright (C) Microsoft Corporation. All rights reserved.

Determining projects to restore...
All projects are up-to-date for restore.
CTA.Web -> /var/www/myDomain/src/Presentation/CTA.Web/bin/Debug/net5.0/CTA.Web.dll
CTA.Web -> /var/www/myDomain/src/Presentation/CTA.Web/bin/Debug/net5.0/CTA.Web.Views.dll
CTA.Web -> /var/www/myDomain/src/Presentation/CTA.Web/bin/Debug/net5.0/publish/

然后我通过创建和编辑我的服务器 block 来配置服务器，该 block 显示如下:

server {

    server_name myDomain.com www.myDomain.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;
    }

listen [::]:443 ssl ipv6only=on; # managed by Certbot
listen 443 ssl; # managed by Certbot
ssl_certificate /etc/letsencrypt/live/myDomain.com/fullchain.pem; # managed by Certbot
ssl_certificate_key /etc/letsencrypt/live/myDomain.com/privkey.pem; # managed by Certbot
include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}

server {
if ($host = www.myDomain.com) {
    return 301 https://$host$request_uri;
} # managed by Certbot


if ($host = myDomain.com) {
    return 301 https://$host$request_uri;
} # managed by Certbot


   listen 80 ;
   listen [::]:80 ;
#server_name myDomain.com www.myDomain.com;
return 404; # managed by Certbot

我运行 sudo nginx -s reload命令也一样。
在 /etc/systemd/system我创建了一个 myDomain.service 文件并添加了以下内容。

[Unit]
Description=Archery app

[Service]
WorkingDirectory=/var/www/myDomain
ExecStart=/usr/bin/dotnet /var/www/myDomain/src/Presentation/CTA.Web/bin/Debug/net5.0/publish/CTA.Web.dll
Restart=always
RestartSec=10
SyslogIdentifier=archery
User=myUsername
Environment=ASPNETCORE_ENVIRONMENT=Production
Environment=DOTNET_PRINT_TELEMETRY_MESSAGE=false

[Install]
WantedBy=multi-user.target

我运行 3 个命令

sudo systemctl enable myDomain.service    
sudo systemctl start myDomain.service    
sudo systemctl status myDomain.service

这就是我得到的状态

myDomain.service - Archery app
 Loaded: loaded (/etc/systemd/system/myDomain.service; enabled; vendor preset: enabled)
 Active: active (running) since Sun 2021-12-12 02:38:49 UTC; 3 days ago
 Main PID: 28005 (dotnet)
 Tasks: 11 (limit: 1136)
 Memory: 51.7M
 CGroup: /system.slice/myDomain.service
         └─28005 /usr/bin/dotnet /var/www/myDomain/src/Presentation/CTA.Web/bin/Debug/net5.0/publish/CTA.Web.dll

 Dec 15 02:28:27 eComArchery archery[28005]: at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
 Dec 15 02:28:27 eComArchery archery[28005]: at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
 Dec 15 02:28:27 eComArchery archery[28005]: at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
 Dec 15 02:28:27 eComArchery archery[28005]: at Microsoft.AspNetCore.Authentication.AuthenticationMiddleware.Invoke(HttpContext context)
 Dec 15 02:28:27 eComArchery archery[28005]: at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.<Invoke>g__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, >Dec 15 02:28:27 eComArchery archery[28005]: at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.HandleException(HttpContext context, ExceptionDispatchInfo edi)
 Dec 15 02:28:27 eComArchery archery[28005]: at Microsoft.AspNetCore.Diagnostics.ExceptionHandlerMiddleware.<Invoke>g__Awaited|6_0(ExceptionHandlerMiddleware middleware, HttpContext context, >Dec 15 02:28:27 eComArchery archery[28005]: at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequests[TContext](IHttpApplication`1 application)
 Dec 15 02:28:27 eComArchery archery[28005]: info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
 Dec 15 02:28:27 eComArchery archery[28005]: Request finished HTTP/1.1 GET http://example.com/ - - - 500 0 - 32.0811ms

如果还有其他任何人想看到，请告诉我。

Answer 1

请注意，您可能拥有正确的服务器配置，因为内部服务器错误可能来自其他原因。
您必须通过启用日志来查看后台发生的情况。为此，请参阅 How i can logging messages from asp.net core application in specific file on linux?和 Logging in .NET Core and ASP.NET Core知道如何在linux上启用它。
然后你可以找到主要问题。