Question

我使用目标框架dnxcore50在ASP.NET Core中创建了WebAPI项目。我的解决方案中有四个项目。

WebAPI - 包含API方法
Core - 包含IRepository，IDataContext接口和基类，以便与dapper与Postgresql进行通信
DataAccess - 包含域
域 - 包含域模型

我的应用程序正在使用Postgresql数据库来存储数据，而在应用程序端，我使用dapper和npgsql nuget包与Postgresql进行数据库操作。

所有内容都在Windows环境中运行，之后我尝试使用Ubuntu 14.04并面临“超时问题”＃39;在select中执行npgsql查询时，我通过使用github issue中提到的解决方案解决了这个问题，之后一切都在Ubuntu机器中完美运行。

所以，我想让我们尝试在docker中运行WebAPI，为此我创建了docker镜像也成功运行了但不幸的是当我调用select API方法调用时，我得到一些新的（与ubuntu 14.04相比）错误域存储库，使用dapper和npgsql来从Postgrespl中选择数据。

fail: Microsoft.AspNet.Server.Kestrel[13]
      An unhandled exception was thrown by the application.
      System.IO.FileNotFoundException: Could not load file or assembly 'System.Net.Security, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.

      File name: 'System.Net.Security, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' ---> System.IO.FileNotFoundException: Could not load the specified file.
      File name: 'System.Net.Security'
         at System.Runtime.Loader.AssemblyLoadContext.LoadFromAssemblyName(AssemblyName assemblyName)
         at System.Runtime.Loader.AssemblyLoadContext.Resolve(IntPtr gchManagedAssemblyLoadContext, AssemblyName assemblyName)
         at Npgsql.NpgsqlConnector.RawOpen(NpgsqlTimeout timeout)
         at Npgsql.NpgsqlConnector.Open(NpgsqlTimeout timeout)
         at Npgsql.NpgsqlConnector.Open()
         at Npgsql.NpgsqlConnectorPool.GetPooledConnector(NpgsqlConnection Connection)
         at Npgsql.NpgsqlConnectorPool.RequestConnector(NpgsqlConnection connection)
         at Npgsql.NpgsqlConnection.OpenInternal(NpgsqlTimeout timeout)
         at Npgsql.NpgsqlConnection.Open()

以下是解决方案中使用的一些project.json文件和docker文件。

核心project.json文件

{
  "version": "1.0.0-*",
  "description": "Core Class Library",
  "authors": [ "Jignesh" ],
  "tags": [ "" ],
  "projectUrl": "",
  "licenseUrl": "",
  "dependencies": {
    "Dapper": "1.50.0-beta8",
    "Dapper.Contrib": "1.50.0-beta8",
    "Npgsql": "3.1.0-alpha6",
    "System.Net.Security": "4.0.0-beta-*",
    "Microsoft.NETCore.Platforms": "1.0.1-beta-*"
  },
  "frameworks": {
    "dnxcore50": {}
  }
}

Docker文件

FROM jignesh/aspnet:1.0.0-rc1-update2-coreclr

RUN printf "deb http://ftp.us.debian.org/debian jessie main\n" >> /etc/apt/sources.list

# Add the PostgreSQL PGP key to verify their Debian packages.
# It should be the same key as https://www.postgresql.org/media/keys/ACCC4CF8.asc
RUN apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys B97B0AFCAA1A47F044F244A07FCC7D46ACCC4CF8

# Add PostgreSQL's repository. It contains the most recent stable release
# of PostgreSQL, ``9.3``.
RUN echo "deb http://apt.postgresql.org/pub/repos/apt/ precise-pgdg main" > /etc/apt/sources.list.d/pgdg.list

# Install ``python-software-properties``, ``software-properties-common`` and PostgreSQL 9.3
# There are some warnings (in red) that show up during the build. You can hide
# them by prefixing each apt-get statement with DEBIAN_FRONTEND=noninteractive
RUN apt-get update && apt-get install -y python-software-properties software-properties-common postgresql-9.3 postgresql-client-9.3 postgresql-contrib-9.3

COPY . /app
WORKDIR /app/src/WebAPI
RUN ["dnu", "restore"]

EXPOSE 5002/tcp

ENTRYPOINT ["dnx", "-p", ".", "web"]

注意 jignesh / aspnet是我为1.0.0-rc1-update2-coreclr创建的本地docker镜像文件，因为hub.docker.com没有。

global.json

{
  "projects": [
    "wrap",
    "src",
    "test"
  ],
  "sdk": {
        "version": "1.0.0-rc1-update2",
        "runtime": "coreclr",
        "architecture": "x64"
  }
}

有人可以帮忙吗？我该怎么做才能解决这个问题。

如果需要更多信息，请与我们联系。

其他信息

ubuntu中的dnx版本信息

Microsoft .NET Execution environment
 Version:      1.0.0-rc1-16609
 Type:         CoreClr
 Architecture: x64
 OS Name:      Linux
 OS Version:   ubuntu 14.04
 Runtime Id:   ubuntu.14.04-x64

docker中的dnx版本信息

Microsoft .NET Execution environment
 Version:      1.0.0-rc1-16609
 Type:         CoreClr
 Architecture: x64
 OS Name:      Linux
 OS Version:   8 debian
 Runtime Id:   ubuntu.14.04-x64

Answer 1

如https://github.com/StackExchange/StackExchange.Redis/issues/350中所述，我在dockerfile中将RUN ["dnu", "restore"]行更改为RUN ["dnu", "restore","--runtime=ubuntu.14.04-x64"]，问题得到解决。

注意 aspnet docker image已经有了行ENV DNX_RUNTIME_ID ubuntu.14.04-x64，但不知道为什么这只是不够并且需要在dnu restore中设置运行时。

无论如何，我很高兴在dnu restore中添加运行时解决了我的问题。

System.IO.FileNotFoundException：无法加载文件或程序集＆System; Net.Net.Security，版本= 4.0.0.0

1 个答案: