Docker镜像: Unable to configure HTTPS endpoint.没有指定服务器证书，找不到默认的开发者证书

Question

我正在尝试使用 Docker 容器在 Ubuntu (18.04.3 LTS) 服务器上运行基于 ASP.NET Core 3.1 框架的应用程序。

我创建了以下 docker-compose.yml 文件，以便能够在我的服务器上运行 nginx-proxy 和 private_image_name 镜像。显然，nginx-proxy 是一个代理服务器，它将作为将来自网络的流量路由到我的其他正在运行的镜像的代理。我关注了article用于 nginx-proxy 设置。

version: '3.4'
services:

  nginx-proxy:
    image: jwilder/nginx-proxy
    container_name: nginx-proxy
    ports:
      - 80:80
      - 443:443
    volumes:
      - /var/run/docker.sock:/tmp/docker.sock:ro
      - certificates:/etc/certificates

  private_image_name:
    image: private_image_name:latest
    container_name: private_image_name
    depends_on:
      - nginx-proxy
    environment:
      - VIRTUAL_HOST=sub.domain-example.com
      - ASPNETCORE_ENVIRONMENT=Production
      - ASPNETCORE_URLS=https://+:443;http://+:80
    ports:
      - 51736:80
      - 44344:443
    volumes:
      - storage:/storage
      - /var/run/docker.sock:/tmp/docker.sock:ro
      - certificates:/etc/certificates
      - ${APPDATA}/Microsoft/UserSecrets:/root/.microsoft/usersecrets:ro
      - ${APPDATA}/ASP.NET/Https:/root/.aspnet/https:ro
volumes:
  storage:
  certificates:
networks:
  default:
    external:
      name: nginx-proxy
secrets:
  server.cert:
    file: ./server.cert
  server.key:
    file: ./server.key

server.cert 和 server.key 文件都存储在 /etc/certificates 中。这两个文件都是使用以下命令创建的

sudo openssl req -new -newkey rsa:4096 -days 3650 -nodes -x509 -subj "/C=US/ST=CA/L=SF/O=Docker-demo/CN=app.example.org" -keyout server.key -out server.cert

我尝试通过执行docker-composer up来运行我的两个镜像。但是，nginx-proxy 没有出现任何问题，而 private_image_name 无法运行。以下是我在运行 private_image_name 尝试启动时得到的结果

**WARNING**: The APPDATA variable is not set. Defaulting to a blank string.
Recreating private_image ... done
Attaching to private_image
private_image    | crit: Microsoft.AspNetCore.Server.Kestrel[0]
private_image    |       Unable to start Kestrel.
private_image    | System.InvalidOperationException: Unable to configure HTTPS endpoint. No server certificate was specified, and the default developer certificate could not be found or is out of date.
private_image    | To generate a developer certificate run 'dotnet dev-certs https'. To trust the certificate (Windows and macOS only) run 'dotnet dev-certs https --trust'.
private_image    | For more information on configuring HTTPS see https://go.microsoft.com/fwlink/?linkid=848054.
private_image    |    at Microsoft.AspNetCore.Hosting.ListenOptionsHttpsExtensions.UseHttps(ListenOptions listenOptions, Action`1 configureOptions)
private_image    |    at Microsoft.AspNetCore.Hosting.ListenOptionsHttpsExtensions.UseHttps(ListenOptions listenOptions)
private_image    |    at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.AddressesStrategy.BindAsync(AddressBindContext context)
private_image    |    at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.BindAsync(IServerAddressesFeature addresses, KestrelServerOptions serverOptions, ILogger logger, Func`2 createBinding)
private_image    |    at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServer.StartAsync[TContext](IHttpApplication`1 application, CancellationToken cancellationToken)
private_image    | Unhandled exception. System.InvalidOperationException: Unable to configure HTTPS endpoint. No server certificate was specified, and the default developer certificate could not be found or is out of date.
private_image    | To generate a developer certificate run 'dotnet dev-certs https'. To trust the certificate (Windows and macOS only) run 'dotnet dev-certs https --trust'.
private_image    | For more information on configuring HTTPS see https://go.microsoft.com/fwlink/?linkid=848054.
private_image    |    at Microsoft.AspNetCore.Hosting.ListenOptionsHttpsExtensions.UseHttps(ListenOptions listenOptions, Action`1 configureOptions)
private_image    |    at Microsoft.AspNetCore.Hosting.ListenOptionsHttpsExtensions.UseHttps(ListenOptions listenOptions)
private_image    |    at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.AddressesStrategy.BindAsync(AddressBindContext context)
private_image    |    at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.AddressBinder.BindAsync(IServerAddressesFeature addresses, KestrelServerOptions serverOptions, ILogger logger, Func`2 createBinding)
private_image    |    at Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServer.StartAsync[TContext](IHttpApplication`1 application, CancellationToken cancellationToken)
private_image    |    at Microsoft.AspNetCore.Hosting.GenericWebHostService.StartAsync(CancellationToken cancellationToken)
private_image    |    at Microsoft.Extensions.Hosting.Internal.Host.StartAsync(CancellationToken cancellationToken)
private_image    |    at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token)
private_image    |    at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.RunAsync(IHost host, CancellationToken token)
private_image    |    at Microsoft.Extensions.Hosting.HostingAbstractionsHostExtensions.Run(IHost host)
private_image    |    at private_image.Program.Main(String[] args) in /src/private_image/Program.cs:line 17
private_image exited with code 139

命令 dotnet dev-certs https --trust 仅适用于 Windows 和 macOS。

问题

如何在 Ubuntu 服务器上解决此问题？如何正确地将 SSL 证书附加到 docker 镜像？

此外，当我转到http://server-ip-address时或http://sub.domain-example.com我明白

503 Service Temporarily Unavailable nginx/1.17.5

当我访问https://server-ip-address时或https://sub.domain-example.com我明白

Unable to connect.

Answer 1

一旦您在 nginx 中设置了证书，我就认为在 asp.net core 容器中启用它没有任何意义，因为您的 docker 网络将通过 nginx 对公众可见。

要禁用 Kestrel Https 监听，只需从以下代码中删除 443 端口:

- ASPNETCORE_URLS=https://+:443;http://+:80

替换为:

- ASPNETCORE_URLS=http://+:80