Dockerize a.NET Core application Estimated reading time: 2 minutes Introduction This example demonstrates how to dockerize an ASP.NET Core application. Why build ASP.NET Core?. Develop and run your ASP.NET Core apps cross-platform on Windows, MacOS, and Linux. Great for modern cloud-based apps, such as web apps, IoT apps, and mobile backends. ASP.NET Core apps can run on or on the full. Designed to provide an optimized development framework for apps that are deployed to the cloud or run on-premises. Modular components with minimal overhead retain flexibility while constructing your solutions Prerequisites This example assumes you already have an ASP.NET Core app on your machine.

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If you are new to ASP.NET you can follow a to initialize a project or clone our. Create a Dockerfile for an ASP.NET Core application. Create a Dockerfile in your project folder.

Add the text below to your Dockerfile for either Linux. The tags below are multi-arch meaning they pull either Windows or Linux containers depending on what mode is set in.

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Read more on. The Dockerfile assumes that your application is called aspnetapp. Change the Dockerfile to use the DLL file of your project. FROM microsoft/dotnet:sdk AS build-env WORKDIR /app # Copy csproj and restore as distinct layers COPY.csproj./ RUN dotnet restore # Copy everything else and build COPY./ RUN dotnet publish -c Release -o out # Build runtime image FROM microsoft/dotnet:aspnetcore-runtime WORKDIR /app COPY -from=build-env /app/out. ENTRYPOINT 'dotnet', 'aspnetapp.dll'. To make your build context as small as possible add a to your project folder and copy the following into it.

Bin obj Build and run the Docker image. Open a command prompt and navigate to your project folder. Use the following commands to build and run your Docker image.