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.NET Samples

Featured Tags

  • dotnetapp (Dockerfile)
    • docker pull mcr.microsoft.com/dotnet/samples:dotnetapp
    • docker pull mcr.microsoft.com/dotnet/samples:dotnetapp-chiseled
  • aspnetapp (Dockerfile)
    • docker pull mcr.microsoft.com/dotnet/samples:aspnetapp
    • docker pull mcr.microsoft.com/dotnet/samples:aspnetapp-chiseled

About

These images contain sample .NET and ASP.NET Core applications.

Watch discussions for Docker-related .NET announcements.

Usage

The .NET Docker samples show various ways to use .NET and Docker together. See Building Docker Images for .NET Applications to learn more.

Container sample: Run a simple application

You can quickly run a container with a pre-built .NET Docker image, based on the .NET console sample.

Type the following command to run a sample console application:

docker run --rm mcr.microsoft.com/dotnet/samples

Container sample: Run a web application

You can quickly run a container with a pre-built .NET Docker image, based on the ASP.NET Core sample.

Type the following command to run a sample web application:

docker run -it --rm -p 8000:8080 --name aspnetcore_sample mcr.microsoft.com/dotnet/samples:aspnetapp

After the application starts, navigate to http://localhost:8000 in your web browser. You can also view the ASP.NET Core site running in the container from another machine with a local IP address such as http://192.168.1.18:8000.

Note: ASP.NET Core apps (in official images) listen to port 8080 by default, starting with .NET 8. The -p argument in these examples maps host port 8000 to container port 8080 (host:container mapping). The container will not be accessible without this mapping. ASP.NET Core can be configured to listen on a different or additional port.

See Hosting ASP.NET Core Images with Docker over HTTPS to use HTTPS with this image.

Image Variants

.NET container images have several variants that offer different combinations of flexibility and deployment size. The Image Variants documentation contains a summary of the image variants and their use-cases.

Distroless images

.NET distroless container images contain only the minimal set of packages .NET needs, with everything else removed. Due to their limited set of packages, distroless containers have a minimized security attack surface, smaller deployment sizes, and faster start-up time compared to their non-distroless counterparts. They contain the following features:

  • Minimal set of packages required for .NET applications
  • Non-root user by default
  • No package manager
  • No shell

.NET offers distroless images for Azure Linux and Ubuntu (Chiseled).

Related Repositories

.NET:

.NET Framework:

Full Tag Listing

Linux amd64 Tags

Tags Dockerfile OS Version
dotnetapp-9.0 Dockerfile Alpine
dotnetapp-chiseled-9.0 Dockerfile Ubuntu
aspnetapp-9.0 Dockerfile Alpine
aspnetapp-chiseled-9.0 Dockerfile Ubuntu
dotnetapp-8.0, dotnetapp, latest Dockerfile Alpine
dotnetapp-chiseled-8.0, dotnetapp-chiseled Dockerfile Ubuntu
aspnetapp-8.0, aspnetapp Dockerfile Alpine
aspnetapp-chiseled-8.0, aspnetapp-chiseled Dockerfile Ubuntu

Linux arm64 Tags

Tags Dockerfile OS Version
dotnetapp-9.0 Dockerfile Alpine
dotnetapp-chiseled-9.0 Dockerfile Ubuntu
aspnetapp-9.0 Dockerfile Alpine
aspnetapp-chiseled-9.0 Dockerfile Ubuntu
dotnetapp-8.0, dotnetapp, latest Dockerfile Alpine
dotnetapp-chiseled-8.0, dotnetapp-chiseled Dockerfile Ubuntu
aspnetapp-8.0, aspnetapp Dockerfile Alpine
aspnetapp-chiseled-8.0, aspnetapp-chiseled Dockerfile Ubuntu

Linux arm32 Tags

Tags Dockerfile OS Version
dotnetapp-9.0 Dockerfile Alpine
dotnetapp-chiseled-9.0 Dockerfile Ubuntu
aspnetapp-9.0 Dockerfile Alpine
aspnetapp-chiseled-9.0 Dockerfile Ubuntu
dotnetapp-8.0, dotnetapp, latest Dockerfile Alpine
dotnetapp-chiseled-8.0, dotnetapp-chiseled Dockerfile Ubuntu
aspnetapp-8.0, aspnetapp Dockerfile Alpine
aspnetapp-chiseled-8.0, aspnetapp-chiseled Dockerfile Ubuntu

Nano Server 2022 amd64 Tags

Tag Dockerfile
dotnetapp-9.0-nanoserver-ltsc2022, dotnetapp-9.0 Dockerfile
aspnetapp-9.0-nanoserver-ltsc2022, aspnetapp-9.0 Dockerfile
dotnetapp-8.0-nanoserver-ltsc2022, dotnetapp-nanoserver-ltsc2022, dotnetapp-8.0, dotnetapp, latest Dockerfile
aspnetapp-8.0-nanoserver-ltsc2022, aspnetapp-nanoserver-ltsc2022, aspnetapp-8.0, aspnetapp Dockerfile

Nano Server, version 1809 amd64 Tags

Tag Dockerfile
dotnetapp-9.0-nanoserver-1809, dotnetapp-9.0 Dockerfile
aspnetapp-9.0-nanoserver-1809, aspnetapp-9.0 Dockerfile
dotnetapp-8.0-nanoserver-1809, dotnetapp-nanoserver-1809, dotnetapp-8.0, dotnetapp, latest Dockerfile
aspnetapp-8.0-nanoserver-1809, aspnetapp-nanoserver-1809, aspnetapp-8.0, aspnetapp Dockerfile

Tags not listed in the table above are not supported. See the Supported Tags Policy. See the full list of tags for all supported and unsupported tags.

Support

These sample images are not intended for production use and may be subject to breaking changes or removal at any time. They are provided as a starting point for developers to experiment with and learn about .NET in a containerized environment.

Lifecycle

Image Update Policy

  • Base Image Updates: Images are re-built within 12 hours of any updates to their base images (e.g. debian:bookworm-slim, windows/nanoserver:ltsc2022, etc.).
  • .NET Releases: Images are re-built as part of releasing new .NET versions. This includes new major versions, minor versions, and servicing releases.
  • Critical CVEs: Images are re-built to pick up critical CVE fixes as described by the CVE Update Policy below.
  • Monthly Re-builds: Images are re-built monthly, typically on the second Tuesday of the month, in order to pick up lower-severity CVE fixes.
  • Out-Of-Band Updates: Images can sometimes be re-built when out-of-band updates are necessary to address critical issues. If this happens, new fixed version tags will be updated according to the Fixed version tags documentation.

CVE Update Policy

.NET container images are regularly monitored for the presence of CVEs. A given image will be rebuilt to pick up fixes for a CVE when:

  • We detect the image contains a CVE with a CVSS score of "Critical"
  • AND the CVE is in a package that is added in our Dockerfile layers (meaning the CVE is in a package we explicitly install or any transitive dependencies of those packages)
  • AND there is a CVE fix for the package available in the affected base image's package repository.

Please refer to the Security Policy and Container Vulnerability Workflow for more detail about what to do when a CVE is encountered in a .NET image.

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License