My application in AspNetCore 3.1, runs locally without any issues with dotnet run. But when running the application in Docker i'm getting the following exception:
System.TypeLoadException: Could not load type 'System.Net.WebProxy' from assembly 'Microsoft.Extensions.Options, Version=3.1.23.0, Culture=neutral, PublicKeyToken=adb9793829ddae60'.\n at[...]
This exception makes no sense, since System.Net.WebProxy isn't part of Microsoft.Extensions.Options and has nothing to do with the library. I'm guessing this isn't the root cause, but I can't find anything to point towards any other issue.
I've tried changing the dependency to use a different version of Microsoft.Extensions.Options and have tried different base images in my dockerfile. Reinstalled dotnet SDK etc. I'm at a total loss.
The following Method is where the application throws.
using MyApp.Model.Extensions;
using MyApp.Wrappers;
using Microsoft.AspNetCore.Http;
using System;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
namespace My.App.Factories
{
public class MyHttpClientFactory : IMyHttpClientFactory
{
public MyHttpClientFactory(IHttpContextAccessor httpContextAccessor)
{
}
[...]
private static HttpClientHandler GetClientHandler(string proxyAddress)
{
WebProxy proxy = null;
if (!string.IsNullOrEmpty(proxyAddress))
{
proxy = new WebProxy(proxyAddress);
}
var httpClientHandler = new HttpClientHandler
{
Proxy = proxy,
UseProxy = proxy != null,
};
return httpClientHandler;
}
}
}
FROM openshift.repo.***.se/***/ubi-dotnet-31-***:latest AS builder
USER 0
ARG configuration=Release
ARG verbosity=normal
WORKDIR /usr/app
COPY . .
RUN dotnet publish \
--runtime linux-x64 \
--configuration ${configuration} \
--output /usr/app/output \
--verbosity ${verbosity} \
/p:PublishTrimmed=true \
/p:PublishSingleFile=false \
./src/My.App
FROM openshift.repo.***.se/***/ubi-dotnet-31-runtime-***:latest
WORKDIR /usr/app
COPY --from=builder /usr/app/output/ ./
USER 1001
EXPOSE 8080
ENV ASPNETCORE_URLS=http://+:8080
ENTRYPOINT ["/usr/app/My.App"]
