Supported tags and respective `Dockerfile` links

  [`1.0.0-preview2-sdk`, `latest` (*1.0.0-preview2/debian/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/master/1.0.0-preview2/debian/Dockerfile)

  [`1.0.0-preview2-nanoserver-sdk`, `nanoserver` (*1.0.0-preview2/nanoserver/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/master/1.0.0-preview2/nanoserver/Dockerfile)

  [`1.0.0-preview2.1-sdk` (*1.0.0-preview2.1/debian/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/master/1.0.0-preview2.1/debian/Dockerfile)

  [`1.0.0-preview2.1-nanoserver-sdk` (*1.0.0-preview2.1/nanoserver/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/master/1.0.0-preview2.1/nanoserver/Dockerfile)

  [`1.0.1-runtime`, `1.0-runtime`, `1-runtime`, `runtime` (*1.0/debian/runtime/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/master/1.0/debian/runtime/Dockerfile)

  [`1.0.1-nanoserver-runtime`, `1.0-nanoserver-runtime`, `1-nanoserver-runtime`, `nanoserver-runtime` (*1.0/nanoserver/runtime/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/master/1.0/nanoserver/runtime/Dockerfile)

  [`1.0.1-runtime-deps`, `1.0-runtime-deps`, `1-runtime-deps`, `runtime-deps` (*1.0/debian/runtime-deps/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/master/1.0/debian/runtime-deps/Dockerfile)

  [`1.1.0-preview1-runtime` (*1.1.0-preview1/debian/runtime/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/master/1.1.0-preview1/debian/runtime/Dockerfile)

  [`1.1.0-preview1-nanoserver-runtime` (*1.1.0-preview1/nanoserver/runtime/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/master/1.1.0-preview1/nanoserver/runtime/Dockerfile)

  [`1.1.0-preview1-runtime-deps` (*1.1.0-preview1/debian/runtime-deps/Dockerfile*)](https://github.com/dotnet/dotnet-docker/blob/master/1.1.0-preview1/debian/runtime-deps/Dockerfile)

For more information about these images and their history, please see the relevant Dockerfile (dotnet/dotnet-docker). These images are updated via pull requests to the dotnet/dotnet-docker GitHub repo.

What is .NET Core?

.NET Core is a general purpose development platform maintained by Microsoft and the .NET community on GitHub. It is cross-platform, supporting Windows, macOS and Linux, and can be used in device, cloud, and embedded/IoT scenarios.

.NET has several capabilities that make development easier, including automatic memory management, (runtime) generic types, reflection, asynchrony, concurrency, and native interop. Millions of developers take advantage of these capabilities to efficiently build high-quality applications.

You can use C# to write .NET Core apps. C# is simple, powerful, type-safe, and object-oriented while retaining the expressiveness and elegance of C-style languages. Anyone familiar with C and similar languages will find it straightforward to write in C#.

.NET Core is open source (MIT and Apache 2 licenses) and was contributed to the .NET Foundation by Microsoft in 2014. It can be freely adopted by individuals and companies, including for personal, academic or commercial purposes. Multiple companies use .NET Core as part of apps, tools, new platforms and hosting services.

https://docs.microsoft.com/en-us/dotnet/articles/core/

How to use these Images

Build and run an application with a .NET Core SDK Image

The most straightforward way to use .NET Core with Docker is to use a .NET Core SDK Docker image as both the build and runtime environment.

In your Dockerfile, include the following line to reference the .NET Core SDK:

FROM microsoft/dotnet

For Windows Containers, you should instead include the Nanoserver version of the .NET Core SDK image:

FROM microsoft/dotnet:nanoserver

Add the following additional lines to your Dockerfile, which will both build and run your application in the container. This Dockerfile has been optimized to take advantage of Docker layering, resulting in faster image building for iterative development. The file can be made shorter but wouldn't be better.

WORKDIR /dotnetapp

# copy project.json and restore as distinct layers
COPY project.json .
RUN dotnet restore

# copy and build everything else
COPY . .
RUN dotnet publish -c Release -o out
ENTRYPOINT ["dotnet", "out/dotnetapp.dll"]

This Dockerfile assumes that your application is called dotnetapp. This can be changed to fit your application.

You can then build and run the Docker image:

$ docker build -t my-dotnet-app .
$ docker run -it --rm my-dotnet-app

You can learn more about how to use this image with the dotnetapp-dev sample.

Build and run a simple app within a .NET Core Container

You may want to try out .NET Core by taking advantage of the convenience of a container. Try the following set of commands to create and run a .NET Core application in a minute (depending on your internet speed).

 $ docker run -it --rm microsoft/dotnet
 [now in the container]
 $ mkdir app
 $ cd app
 $ dotnet new
 $ ls
 $ dotnet restore
 $ dotnet run
 $ dotnet bin/Debug/netcoreapp1.0/app.dll
 $ dotnet publish -c Release -o out
 $ dotnet out/app.dll
 $ exit

The steps above are intended to show the basic functions of .NET Core tools. Try running dotnet run twice. You'll see that the second invocation skips compilation. The subsequent command after dotnet run demonstrates that you can run an application directly out of the bin folder, without the additional build logic that dotnet run adds. The last two commands demonstrate the publishing scenario, which prepares an app to be deployed on the same or other machine, with a requirement on only the .NET Core Runtime, not the larger SDK. Naturally, you don't have to exit immediately, but can continue to try out the product as long as you want.

On Windows, the experience is very similar. The commands should be the same, with the exception of the first command (specifically the image name), ls and the directory separators. Try the following command, to replace the first command above:

 $ docker run -it --rm microsoft/dotnet:nanoserver

Build and run an ASP.NET app within a .NET Core Container

You can try similar instructions with an ASP.NET Core app.

$ docker run -p 8000:80 -e "ASPNETCORE_URLS=http://+:80" -it --rm microsoft/dotnet
[now in the container]
$ mkdir app
$ cd app
$ dotnet new -t web
$ dotnet restore
$ dotnet run
$ exit

On your host machine, browse to http://localhost:8000. You should see a default ASP.NET Core site and logging activity in the container.

On Windows, the experience is very similar. Try the following command, to replace the first command above:

$ docker run -p 8000:80 -e "ASPNETCORE_URLS=http://+:80" -it --rm microsoft/dotnet:nanoserver

Please use the images at microsoft/aspnetcore. They are recommended and optimized for ASP.NET core development and production and are built on the images in this repo.

Deploy a pre-built application with the .NET Core Runtime image

For production scenarios, you will want to deploy your application with the .NET Core Runtime. This results in smaller Docker images. The SDK is not needed for production scenarios, only to build and test your application.

In your Dockerfile, include the following line to deploy your pre-built application:

FROM microsoft/dotnet:1.0.1-runtime

For Windows containers, you should instead include the following line in your Dockerfile:

FROM microsoft/dotnet:1.0.1-nanoserver-runtime

The following is a complete Dockerfile example that assumes dotnetapp.dll is the application name and has been published to the out directory.

FROM microsoft/dotnet:1.0.1-runtime
WORKDIR /dotnetapp
COPY out .
ENTRYPOINT ["dotnet", "dotnetapp.dll"]

You can then build and run the Docker image:

$ docker build -t my-dotnet-app .
$ docker run -it --rm my-dotnet-app

You can learn more about how to use this image with the - Development sample.

More Examples using these Images

You can learn more about using .NET Core with Docker with .NET Docker samples:

Development sample using the sdk .NET Core SDK image.
Production sample using the runtime .NET Core image.
Self-contained sample using the runtime-deps base OS image (with native dependencies added).
Preview sample using a Preview sdk .NET Core SDK image.

Windows Container variants are provided at the same locations, above, and use slightly different image tags (for example, 1.0.0-preview2-nanoserver).

See Building Docker Images for .NET Core Applications to learn more about the various Docker images and when to use each for them.

Related Repos

See the following related repos for other application types:

microsoft/aspnetcore for ASP.NET Core applications.
microsoft/aspnet for ASP.NET Web Forms and MVC applications.
microsoft/dotnet-framework for .NET Framework applications (for web applications, see microsoft/aspnet).

Image variants

The microsoft/dotnet images come in different flavors, each designed for a specific use case.

`microsoft/dotnet:<version>-sdk`

This is the defacto image. If you are unsure about what your needs are, you probably want to use this one. It is designed to be used both as a throw away container (mount your source code and start the container to start your app), as well as the base to build other images off of.

It contains the .NET Core SDK which is comprised of two parts:

.NET Core
.NET Core command line tools

Use this image for your development process (developing, building and testing applications).

`microsoft/dotnet:<version>-runtime`

This image contains the .NET Core (runtime and libraries) and is optimized for running .NET Core apps in production.

`microsoft/dotnet:<version>-runtime-deps`

This image contains the operating system with all of the native dependencies needed by .NET Core. This is for self-contained applications.

`microsoft/dotnet:<version>-nanoserver`

There are multiple images for Windows Nanoserver, for .NET Core and Runtime distributions.

For more information on Windows Containers and a getting started guide, please see: Windows Containers Documentation.

License

View license information for the software contained in this image.

.NET Core source code is separately licensed as MIT LICENSE.

Windows Container images are licensed per the Windows license:

MICROSOFT SOFTWARE SUPPLEMENTAL LICENSE TERMS

CONTAINER OS IMAGE

Microsoft Corporation (or based on where you live, one of its affiliates) (referenced as “us,” “we,” or “Microsoft”) licenses this Container OS Image supplement to you (“Supplement”). You are licensed to use this Supplement in conjunction with the underlying host operating system software (“Host Software”) solely to assist running the containers feature in the Host Software. The Host Software license terms apply to your use of the Supplement. You may not use it if you do not have a license for the Host Software. You may use this Supplement with each validly licensed copy of the Host Software.

Supported Docker versions

This image is officially supported on Docker version 1.12.2.

Please see the Docker installation documentation for details on how to upgrade your Docker daemon.

User Feedback

Issues

If you have any problems with or questions about this image, please contact us through a GitHub issue.

Contributing

You are invited to contribute new features, fixes, or updates, large or small; we are always thrilled to receive pull requests, and do our best to process them as fast as we can.

Before you start to code, please read the .NET Core contribution guidelines.

Documentation

You can read documentation for .NET Core, including Docker usage in the .NET Core docs. The docs are also open source on GitHub. Contributions are welcome!

dockermaster/dotnet-docker

Supported tags and respective Dockerfile links