在docker机器上调试时，MySql连接被拒绝

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DB .

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 . 可能导致什么？

UPD： 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 file ：

MySQL数据库服务器配置文件 . 您可以将其复制到以下选项之一： - “/etc/mysql/my.cnf”设置全局选项， - “〜/ .my.cnf”设置用户特定选项 . 可以使用程序支持的所有长选项 . 使用--help运行程序以获取可用选项列表，并使用--print-defaults查看它实际可以理解和使用的内容 . 有关说明，请参阅http://dev.mysql.com/doc/mysql/en/server-system-variables.html重要信息：可以覆盖此文件中的设置的其他设置！文件必须以“.cnf”结尾，否则将被忽略 . ！includedir /etc/mysql/conf.d/！includedir /etc/mysql/mysql.conf.d/

netstat -tln :