无法连接 docker 容器内的 SQLServer

Question

I'm creating a container, which has an .net core application, based on the official microsoft image.

I'm getting the following error when the application try to connect to SQL server, it only happens inside the container: A connection was successfully established with the server, but then an error occurred during the pre-login handshake. (provider: SSL Provider, error: 31 - Encryption(ssl/tls) handshake failed)

My application uses the following packages for communcicate with sqlserver:

• System.Data.SqlClient 4.8.2
• Dapper 2.0.78

My connectionstring looks like this:

Data Source=xxx.xxx.xxx.xxx;Initial Catalog=XXXXXXXX;User ID=XXXXX;Password=XXXX;MultipleActiveResultSets=True;Connect Timeout=60;TrustServerCertificate=true

My docker Version isthe latest avaliable at the time: "Docker version 20.10.2, build 2291f61" is running on windows and this is how i'm creating the docher image:

FROM mcr.microsoft.com/dotnet/sdk:3.1 AS build-env
WORKDIR /prj

COPY . .
RUN dotnet publish myapp.csproj -o /app 

FROM mcr.microsoft.com/dotnet/aspnet:3.1
WORKDIR /app

RUN update-ca-certificates --fresh

COPY --from=build-env /app .
ENTRYPOINT ["dotnet", "myapp.dll"]

I've been googling for some time now, and I didn't found a solution that works for me, can some one help?

Answer 1

This error typically occurs in client environments like docker image containers, Unix clients, or Windows clients where TLS 1.2 is the minimum supported TLS protocol.

Configure TLS/SSL settings in the docker image/client environment to connect with TLS 1.0.

MinProtocol = TLSv1 
CipherString = DEFAULT@SECLEVEL=1