Cannot able to run a docker image on Linux Machine for dot net core 2.1 application which is using MySQL db with Pomelo.EntityFrameworkCore.MySql

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Following exception is being thrown when .net core 2.1 API application's docker image is executed(run) on Linux machine

I am using Pomelo.EntityFrameworkCore.MySql to use MySQL Database

When I build and run the api image on windows machine it is running fine, but when I tried to run the same image on linux, following exception is being thrown.

It is the same case when I build and run the image on linux machine.

Not sure what is going wrong.

Microsoft.EntityFrameworkCore.Database.Connection[20004. An error occurred using the connection to database '' on server ''. MySql.Data.MySqlClient.MySqlException (0x80004005): Connect Timeout expired. --- System.ObjectDisposedException: Safe handle has been closed at System.Runtime.InteropServices.SafeHandle.DangerousAddRef(Boolean& success) at System.StubHelpers.StubHelpers.SafeHandleAddRef(SafeHandle pHandle, Boolean& success) Interop.Sys.TryChangeSocketEventRegistration(IntPtr port, SafeHandle socket, SocketEvents currentEvents, SocketEvents newEvents, IntPtr data)

Looking forward for expert help and highly appreciated.

asp.net-core-2.0 asp.net-core asp.net-core-webapi mysql c#
1 Answers

The container/server running MySQL Server is not accessible from your Docker container running your application. As a result, your application is timing out (“Connect Timeout expired”) when attempting to open a database connection.

Make sure your network setup allows your web server to contact the DB server on port 3306.

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