c# - 在 docker 机器上调试时 MySql 连接被拒绝

Question

然后我在 IIS Express 上运行调试一切正常。

我通过 Ssh.NET 库通过 ssh 连接到数据库。

PasswordConnectionInfo connectionInfo = new PasswordConnectionInfo("here is remote ip", 22, "ssh login here", "password for ssh")
{
    Timeout = TimeSpan.FromSeconds(30)
};
var client = new SshClient(connectionInfo);
client.Connect();
ForwardedPortLocal portForward = new ForwardedPortLocal("127.0.0.1", 22, "127.0.0.1", 3306);
client.AddForwardedPort(portForward);
portForward.Start();

services.AddDbContext<WhetherContext>(options =>
            options.UseMySQL(Configuration.GetConnectionString("Server=127.0.0.1;Port=22;Database=MyDb;Uid=MySqlDatabaseLogin;Pwd=DbPassword;SslMode=none;")));

当我在 docker-machine 上运行它时，它会在尝试使用上下文时抛出异常。

我使用 Linux 容器。可能是什么原因造成的？

更新: Dockerfile

FROM microsoft/aspnetcore:2.0 AS base
RUN curl -sL https://deb.nodesource.com/setup_8.x
RUN bash -
RUN apt-get -y update
RUN apt-get install -y build-essential nodejs
RUN ln -s /usr/bin/nodejs /usr/bin/node
WORKDIR /app
EXPOSE 80

FROM microsoft/aspnetcore-build:2.0 AS build
WORKDIR /src
COPY *.sln ./
COPY WhetherService/WhetherService.csproj WhetherService/
RUN dotnet restore
COPY . .
WORKDIR /src/WhetherService
RUN dotnet build -c Release -o /app


FROM build AS publish
RUN dotnet publish -c Release -o /app

FROM base AS final
WORKDIR /app
COPY --from=publish /app .
ENTRYPOINT ["dotnet", "WhetherService.dll"]

docker-compose.yml

version: '3'

services:
  whetherservice:
    image: alexandrs/whetherservice
    build:
     context: .
     dockerfile: WhetherService/Dockerfile

docker-compose.ci.build.yml

version: '3'

services:
  ci-build:
    image: microsoft/aspnetcore-build:1.0-2.0
    volumes:
       - .:/src
    working_dir: /src
    command: /bin/bash -c "dotnet restore ./WhetherService.sln && dotnet publish ./WhetherService.sln -c Release -o ./obj/Docker/publish"

/etc/mysql/my.cnf文件:

The MySQL database server configuration file.

You can copy this to one of: - "/etc/mysql/my.cnf" to set global options, - "~/.my.cnf" to set user-specific options.

One can use all long options that the program supports. Run program with --help to get a list of available options and with --print-defaults to see which it would actually understand and use.

For explanations see http://dev.mysql.com/doc/mysql/en/server-system-variables.html

• IMPORTANT: Additional settings that can override those from this file! The files must end with '.cnf', otherwise they'll be ignored.

!includedir /etc/mysql/conf.d/

!includedir /etc/mysql/mysql.conf.d/

netstat -tln :

Answer 1

从您提供的信息来看，您似乎只是忘记将远程 mysql 连接到图像。这样做的方法是在远程服务器上打开一个端口进行监听，然后在运行该程序的 docker 镜像中，您需要使用带有该远程服务器的主机名或 IP 地址的 conn 字符串进行连接。