I'm trying to connect to a MongoDB container using a .NET core 3.1 webapi container but every time I build and run the webapi container I get the following exception thrown in one of the services when its attempting to get data using C# MongoDB.Driver from the mongo container:
'A timeout occured after 30000ms selecting a server using CompositeServerSelector{ Selectors = MongoDB.Driver.MongoClient+AreSessionsSupportedServerSelector, LatencyLimitingServerSelector{ AllowedLatencyRange = 00:00:00.0150000 } }. Client view of cluster state is { ClusterId : "1", ConnectionMode : "Automatic", Type : "Unknown", State : "Disconnected", Servers : [{ ServerId: "{ ClusterId : 1, EndPoint : "Unspecified/localhost:27017" }", EndPoint: "Unspecified/localhost:27017", State: "Disconnected", Type: "Unknown", HeartbeatException: "MongoDB.Driver.MongoConnectionException: An exception occurred while opening a connection to the server.
---> System.Net.Internals.SocketExceptionFactory+ExtendedSocketException (10061): No connection could be made because the target machine actively refused it. [::1]:27017
at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw(Exception source)
at System.Net.Sockets.Socket.EndConnect(IAsyncResult asyncResult)
at System.Net.Sockets.Socket.<>c.<ConnectAsync>b__274_0(IAsyncResult iar)
--- End of stack trace from previous location where exception was thrown ---
at MongoDB.Driver.Core.Connections.TcpStreamFactory.ConnectAsync(Socket socket, EndPoint endPoint, CancellationToken cancellationToken)
at MongoDB.Driver.Core.Connections.TcpStreamFactory.CreateStreamAsync(EndPoint endPoint, CancellationToken cancellationToken)
at MongoDB.Driver.Core.Connections.BinaryConnection.OpenHelperAsync(CancellationToken cancellationToken)
--- End of inner exception stack trace ---
at MongoDB.Driver.Core.Connections.BinaryConnection.OpenHelperAsync(CancellationToken cancellationToken)
at MongoDB.Driver.Core.Servers.ServerMonitor.HeartbeatAsync(CancellationToken cancellationToken)", LastUpdateTimestamp: "2020-06-07T05:10:17.3502634Z" }] }.'
I can successfully connect to the MongoDB container using MongoDB compass or even using the same web api IIS express instace, the above exception is only thrown when I try to connect using a docker container. I inspected both containers and confirmed that they are both running on the same network.
Here the Dockerfile for the webapi:
FROM mcr.microsoft.com/dotnet/core/aspnet:3.1-nanoserver-1903 AS base
WORKDIR /app
EXPOSE 80
EXPOSE 443
FROM mcr.microsoft.com/dotnet/core/sdk:3.1-nanoserver-1903 AS build
WORKDIR /src
COPY ["API/API.csproj", "API/"]
RUN dotnet restore "API/API.csproj"
COPY . .
WORKDIR "/src/API"
RUN dotnet build "API.csproj" -c Release -o /app/build
FROM build AS publish
RUN dotnet publish "API.csproj" -c Release -o /app/publish
FROM base AS final
WORKDIR /app
COPY --from=publish /app/publish .
ENTRYPOINT ["dotnet", "API.dll"]
MongoDB container is using the latest official MongoDb image. The docker image is run using the following command :
docker run -d -p 27017-27019:27017-27019 --name mongodb mongo:latest
The webapi appsettings.json looks like this:
{
"DatabaseSettings": {
"CollectionName": "collectionName",
"ConnectionString": "mongodb://host.docker.internal:27017",
"DatabaseName": "db"
},
"Logging": {
"LogLevel": {
"Default": "Information",
"Microsoft": "Warning",
"Microsoft.Hosting.Lifetime": "Information"
}
},
"AllowedHosts": "*"
}
The .NET core 3.1 webapi was built following Microsofts tutorial
For further information here is what the Startup.cs file looks like:
public void ConfigureServices(IServiceCollection services)
{
// requires using Microsoft.Extensions.Options
services.Configure<DatabaseSettings>(
Configuration.GetSection(nameof(DatabaseSettings)));
services.AddSingleton<IDatabaseSettings>(sp =>
sp.GetRequiredService<IOptions<DatabaseSettings>>().Value);
services.AddSingleton<EarningsService>();
services.AddCors(o => o.AddPolicy("CorsPolicy", builder =>
{
builder.AllowAnyOrigin()
.AllowAnyMethod()
.AllowAnyHeader();
}));
services.AddControllers();
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
//app.UseHttpsRedirection();
app.UseRouting();
app.UseAuthorization();
app.UseCors("CorsPolicy");
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
I've looked at all of the following questions to try and figure out how to connect:
- Connecting to Mongodb docker container from another docker container
- Nodejs application docker unable to connect to mongodb docker container
- Unable to connect to mongoDB running in docker container
- How to connect to MongoDB running in Docker container?
- https://success.docker.com/article/how-can-i-access-mongodb-container-from-another-container
Any help is greatly appreciated. Thank you!
